関研究室 | 研究成果

研究成果：関志朗

IF付き学術論文

2023

[115]H.Watanabe, Y.Sugiura, S.Seki, J.Han, I.Shitanda, M.Itagaki, Y.Umebayashi 'Discharge Behavior within Lithium−Sulfur Batteries Using Li−Glyme Solvate Ionic Liquids' The Journal of Physical Chemistry C (2023)

2022

[114]S.Uchiyama, S.Uemura, K.Hiraoka, Y.Kimura, S.Seki 'Corrosion and degradation behavior of aluminum and copper refrigerant piping' Materials and Corrosion, 74, 344-351 (2022)
[113]H.Miyauchi, K.Inaba, K.Takahashi, N.Arai, Y.Umebayashi, S.Seki 'Li+ Transport Properties of Sulfolane-based Gel Polymer Electrolyte and Effective Suppression of Lithium Polysulfide Dissolution in Lithium–Sulfur Batteries' Sustainable Energy & Fuels, 6, 4218-4266 (2022)
[112]K.Machida, H.Miyauchi, Y.Ushioda, K.Takahashi, S.Seki 'Investigation for Charge-Discharge Operations of Li4Ti5O12-Sulfur Batteries by Suitable Choice of Materials and Cell Preparation Processes' Electrochemistry,90/6, 067006-1-067006-4 (2022)
[111]Y.Yokomaku, K.Hiraoka, K.Inaba, S.Seki 'Solid Gel Electrolytes with Highly Concentrated Liquid Electrolyte in Polymer Networks and Their Physical and Electrochemical Properties and Application to Sodium Secondary Batteries' Journal of The Electrochemical Society, 169, 040535 (2022)

2021

[110]S.Wakita, Y.Sugahara, M.Nakamura, S.Kobayashi, K.Matsuda, C.Takasaki, M.Kimura, Y.Kida, M.Uehara, E.Tabata, K.Hiraoka, S.Seki, V.Matoska, P.O.Bauer, F.Oyama 'Mouse Acidic Chitinase Effectively Degrades Random-Type Chitosan to Chitooligosaccharides of Variable Lengths under Stomach and Lung Tissue pH Conditions' Molecules, 26, 6706-1-6706-13 (2021)
[109]K.Hiraoka, M.Inoue, K.Takahashi, K.Hayamizu, M.Watanabe, S.Seki 'Analysis of Ionic Transport and Electrode Interfacial Reaction, and NMR One-Dimensional Imaging of Ether-based Polymer Electrolytes' Journal of The Electrochemical Society, 168/ 060501 (2021)
[108]Y.Ushioda, K.Takahashi, M.Watanabe, S.Seki 'Experimental Methods for Assembly of Dendrite-Free Lithium-Sulfur Batteries' Chemistry Letters, 50, 1217-1219, (2021)
[107]S.Tsuzuki, T.Kaneko, K.Sodeyama, Y.Umebayashi, W.Shinoda, S.Seki, K.Ueno, K.Dokko, M.Watanabe 'Thermodynamic Aspect of Sulfur, Polysulfide Anion and Lithium Polysulfide: Plausible Reaction Path During Discharge of Lithium–Sulfur Battery' Physical Chemistry Chemical Physics, 23, 6832-6840 (2021)

2020

[106]K.Hiraoka, M.Kato, T.Kobayashi, S.Seki 'Polyether / Na3Zr2Si2PO12 Composite Solid Electrolytes for All-solid-state Sodium Batteries' The Journal of Physical Chemistry C, 124, 21948-21956 (2020)
[105]T.Saito, K.Nishikawa, T.Nakamura, S.Seki 'Precise Analysis of Resistance Components and Estimation of Number of Particles in Li-ion Battery Electrode Sheet Using LiCoO2 Single Particle Electrochemical Properties' 124, 16758-16762 (2020)
[104]K.Takahashi, A.Yokoo, Y.Kaneko, T.Abe, S.Seki 'Fluoride Ion Conductive Polymer Electrolytes for All-solid-state Fluoride Shuttle Batteries' 88/4, 310-313 (2020)
[103]N.Arai, H.Watanabe, E.Nozaki, S.Seki, S.Tsuzuki, K.Ueno, K.Dokko, M.Watanabe, Y.Kameda, Y.Umebayashi 'Speciation Analysis and Thermodynamic Criterion of Solvate Ionic Liquids; Whether Ionic Liquids or Super-Concentrated Solutions?' The Journal of Physical Chemistry Letters, 11, 4517-4523 (2020)
[102]M.Kato, K.Hiraoka, S.Seki 'Investigation of the Ionic Conduction Mechanism of Polyether/Li7La3Zr2O12 Composite Solid Electrolytes by Electrochemical Impedance Spectroscopy' Journal of The Electrochemical Society, 167, 070559-1-070559-8 (2020)
[101]S.Tsuzuki, T.Nakamura, T.Morishita, W.Shinoda, S.Seki, Y.Umebayashi, K.Ueno, K.Dokko, M.Watanabe 'Effects of Anion on Liquid Structures of Ionic Liquids at Graphene Electrode Interface Analyzed by Molecular Dynamics Simulations' Batteries & Supercaps, 3, 658-667 (2020)

2019

[100]N.Arai, H.Watanabe, T.Yamaguchi, S.Seki, K.Ueno, K.Dokko, M.Watanabe, Y.Kameda, R.Buchner, Y.Umebayashi 'Dynamic Chelate Eﬀect on the Li+‑Ion Conduction in Solvate Ionic Liquids' The Journal of Physical Chemistry C, 123, 30228-30233 (2019)
[99]K.Takahashi, Y.Ishino, W.Murata, Y.Umebayashi, S.Tsuzuki, M.Watanabe, H.Takaba, S.Seki 'Physicochemical compatibility of highly-concentrated solvate ionic liquids and a low-viscosity solvent' RSC Advances, 9,24922-24927 (2019)
[98]Y.Ishino, K.Takahashi, W.Murata, Y.Umebayashi, S.Tsuzuki, M.Watanabe, M.Kamaya, S.Seki 'Effect of Electrolyte Composition on Performance and Stability of Lithium-sulfur Batteries' Energy Technology, 1900197-1-1900197-4 (2019)
[97]S.Seki, N.Serizawa, S.Ono, K.Takei, K.Hayamizu, S.Tsuzuki, Y.Umebayashi 'Densities, Viscosities, and Refractive Indices of Binary Room-Temperature Ionic Liquids with Common Cations/Anions' Jounal of Chemical Engineering, 64, 433-441 (2019)

2018

[96]K.Hayamizu, S.Seki, T.Haishi 'Li NMR Diffusion Studies in Micrometre-space for Perovskite-type Li0.33La0.55TiO3 (LLTO) Influenced by Grain Boundaries' Solid State Ionics, 326, 37-47 (2018)
[95]K.Hayamizu, S.Seki, T.Haishi 'Non-uniform Lithium-ion Migration on Micrometre Scale for Garnet- and NASICON-type Solid Electrolytes Studied by 7Li PGSE-NMR Diffusion Spectroscopy' Physical Chemistry Chemical Physics, 20, 17615-17623 (2018)
[94] S. Seki, K. Hayamizu, S. Tsuzuki, K. Takahashi, Y. Ishino, M. Kato, E. Nozaki, H. Watanabe, Y. Umebayashi ‘Density, Viscosity, Ionic Conductivity, and Self-Diffusion Coefficient of Organic Liquid Electrolytes. 1. Propylene Carbonate + Li, Na, Mg and Ca Cation Salts’ Journal of The Electrochemical Society, 165, A542-A546 (2018).

＞ 2017年以前

2017

[93] S. Maeda, Y. Kameda, Y. Amo, T. Usuki, K. Ikeda, T. Otomo, M. Yanagisawa, S. Seki, N. Arai, H. Watanabe, Y. Umebayashi ‘Local Structure of Li+ in Concentrated Ethylene Carbonate Solutions Studied by Low-frequency Raman Scattering and Neutron Diffraction with 6Li/7Li Isotopic Substitution Methods’ The Journal of Physical Chemistry B, 121, 10979-10987 (2017).
[92] E. Tabata, A. Kashimura, S. Wakita, M. Ohno, M. Sakaguchi, Y. Sugahara, Y. Imamura, S. Seki, H. Ueda, V. Matoska, P. O. Bauer, F. Oyama* ‘Protease resistance of porcine acidic mammalian chitinase under gastrointestinal conditions implies that chitin-containing organisms can be sustainable dietary resources’ Scientific Reports, 7, 12963-1-12963-11 (2017).
[91] M. Saito,* S. Kosaka,T. Fujinami, Y. Tachikawa, H. Shiroishi, D. Streich, E.J.Berg, P. Novak, S. Seki ‘A New Concept of an Air-Electrode Catalyst for Li2O2 Decomposition Using MnO2 Nanosheets on Rechargeable Li-O2 Batteries’ Electrochimica Acta, 252, 192-199 (2017).
[90] M. Saito,* S. Kawaharasaki, K. Ito, S. Yamada, K. Hayamizu, S. Seki ‘Strategies for fast ion transport in electrochemical capacitor electrolytes from diffusion coefficients, ionic conductivity, viscosity, density and interaction energies based on HSAB theory’ RSC Advances, 7, 14528-14535 (2017).
[89] S. Seki,* N. Serizawa, K. Takei, Y. Umebayashi, S. Tsuzuki, M. Watanabe ‘Long-cycle-life lithium-sulfur batteries with lithium solvate ionic liquid’ Electrochemistry, 85, 680-682 (2017).
[88] S. Tsuzuki,* T. Mandai, S. Suzuki, W. Shinoda, T. Nakamura, T. Morishita, K. Ueno, S. Seki, Y. Umebayashi, K. Dokko,* M. Watanabe ‘Effect of the cation on the stability of cation?glyme complexes and their interactions with the [TFSA] anion’ Physical Chemistry Chemical Physics, 19, 18262-18272 (2017).
[87] S. Seki* ‘Solvent-free 4V-class all-solid-state lithium-ion polymer secondary batteries’ Chemistry Select, 2, 3848?3853 (2017).
[86] M. Saito,* S. Kawaharasaki, K. Ito, S. Yamada, K. Hayamizu, S. Seki ‘Strategies for fast ion transport in electrochemical capacitor electrolytes from diffusion coefficients, ionic conductivity, viscosity, density and interaction energies based on HSAB theory’ RSC Advances, 7, 14528-14535 (2017).
[85] K. Hayamizu,* S. Seki, T. Haishi ‘Lithium ion micrometer diffusion in a garnet-type cubic Li7La3Zr2O12 (LLZO) studied using 7Li NMR spectroscopy’ The Journal of Chemical Physics, 146, 024701 (2017).

2016

[84] M. Saito,* K. Takahashi, K. Ueno, S. Seki ‘Electrochemical charge/discharge properties of Li pre-doped Si nanoparticles for use in hybrid capacitor systems’ Journal of The Electrochemical Society, 163, A3140-A3145 (2016).
[83] S. Saito, H. Watanabe, Y. Hayashi, M. Matsugami, S. Tsuzuki, S. Seki, J. N. C. Lopes, R. Atkin, K. Ueno, K. Dokko, M. Watanabe, Y. Kameda,* Y. Umebayashi* ‘Li+ local structure in Li?tetraglyme solvate ionic liquid revealed by neutron total scattering experiments with 6/7Li isotopic substitution technique’ The Journal of Physical Chemistry Letters, 7, 2832-2837 (2016).
[82] S. Seki,* N. Serizawa, K. Takei, S. Tsuzuki, Y. Umebayashi, Y. Katayama, T. Miura, K. Dokko, M. Watanabe ‘Effects of Non-equimolar Lithium Salt Glyme Solvate Ionic Liquid on the Control of Interfacial Degradation in Lithium Secondary Batteries’ RSC Advances, 6, 33043-33047 (2016).
[81] S. Saito, H. Watanabe, K. Ueno, T. Mandai, S. Seki, S. Tsuzuki, Y. Kameda, K. Dokko, M. Watanabe, Y. Umebayashi* ‘Li+ Local Structure in Hydrofluoroether Diluted Li-Glyme Solvate Ionic Liquid’ The Journal of Physical Chemistry B, 120, 3378-3387 (2016).
[80] S. Ono,* K. Miwa, S. Seki ‘Determination of optimal ionic liquid for organic single-crystal field-effect transistors’ Applied Physics Letters, 108, 063301 (2016).

2015

[79] T. Yamaguchi,* T. Yonezawa, K. Yoshida, T. Yamaguchi, M. Nagao, A. Faraone, S. Seki ‘Relationship between Structural Relaxation, Shear Viscosity, and Ionic Conduction of LiPF6/Propylene Carbonate Solutions’ The Journal of Physical Chemistry B, 119, 15675-15682 (2015).
[78] H. Moon, T. Mandai, R. Tatara, K. Ueno, A. Yamazaki, K. Yoshida, S. Seki, K. Dokko*, M. Watanabe* ‘Solvent activity in electrolyte solutions controls electrochemical reactions in Li-ion and Li-sulfur batteries’ The Journal of Physical Chemistry C, 119, 3957-3970 (2015).
[77] S. Tsuzuki,* W. Shinoda, M. Matsugami, Y. Umebayashi, K. Ueno, T. Mandai, S. Seki, K. Dokko, M. Watanabe ‘Structures of [Li(glyme)]+ complexes and their interactions with anions in equimolar

2014

[76] K. Fujii,* S. Seki, K. Ohara, Y. Kameda, H. Doi, S. Saito, Y. Umebayashi ‘High-energy X-ray diffraction and MD simulation study on the ion-ion iteractions in 1-Ethyl-3-methylimidazolium bis(fluorosulfonyl)amide’ Journal of Solution Chemistry, 43, 1655-1668 (2014).
[75] K. Hayamizu,* S. Tsuzuki, S. Seki ‘Transport and electrochemical properties of three quaternary ammonium ionic liquids and lithium salts doping effects studied by NMR spectroscopy’ Journal of Chemical Engineering Data, 59, 1944-1954 (2014).
[74] S. Seki,* S. Tsuzuki, K. Hayamizu, N. Serizawa, S. Ono, K. Takei, H. Doi, Y. Umebayashi ‘Static and transport properties of alkyltrimethylammonium cation-based room-temperature ionic liquids’ The Journal of Physical Chemistry B, 118, 4590-4599 (2014).

2013

[73] K. Fujii, H. Hamano, H. Doi, X. Song, S. Tsuzuki,* K. Hayamizu, S. Seki, Y. Kameda, K. Dokko, M. Watanabe, Y. Umebayashi* ‘Unusual Li+ ion solvation structure in bis(fluorosulfonyl)amide based ionic liquid’ The Journal of Physical Chemistry C, 117, 19314-19324 (2013).
[72] N. Serizawa,* S. Seki, K. Takei, H. Miyashiro, K. Yoshida, K. Ueno, N. Tachikawa, K. Dokko, Y. Katayama, M. Watanabe, T. Miura ‘EQCM measurement of deposition and dissolution of lithium in glyme-Li salt molten complex’ Journal of The Electrochemical Society, 160, A1529-A1533 (2013).
[71] S. Seki,* N. Serizawa, K. Takei, K. Dokko, M. Watanabe ‘Charge / discharge performances of glyme - lithium salt equimolar complex electrolyte for lithium secondary batteries’ Journal of Power Sources, 243, 323-327 (2013).
[70] K. Dokko, N. Tachikawa, K. Yamauchi, M. Tsuchiya, A. Yamazaki, E. Takashima, J. Park, K. Ueno, S. Seki, N. Serizawa, M. Watanabe* ‘Solvate ionic liquid electrolyte for Li-S batteries’ Journal of The Electrochemical Society, 160, A1304-A1310 (2013).
[69] S. Tsuzuki,* W. Shinoda, S. Seki, Y. Umebayashi, K. Yoshida, K. Dokko, M. Watanabe ‘Intermolecular interactions in Li+-glyme and Li+-glyme?TFSA? complexes: Relationship with physicochemical properties of [Li(glyme)][TFSA] ionic liquids’ CHEMPHYSCHEM, 14, 1993-2001 (2013).
[68] K. Fujii,* M. Shibayama, T. Yamaguchi, K. Yoshida, T. Yamaguchi, S. Seki, H. Uchiyama, A. Q. R. Baron, Y. Umebayashi ‘Collective dynamics of room-temperature ionic liquids and their Li ion solutions studied by high-resolution inelastic X-ray scattering’ Journal of Chemical Physics, 138, 151101 (2013).

2012

[67] K. Hayamizu,* S. Tsuzuki, S. Seki, Y. Umebayashi ‘Multinuclear NMR studies on translational and rotational motion for two ionic liquids composed of BF4 anion’ The Journal of Physical Chemistry B, 116, 11284-11291 (2012).
[66] S. Seki,* Y. Ohno, Y. Mita, N. Serizawa, K. Takei, H. Miyashiro ‘Imidazolium-based room-temperature ionic liquid for lithium secondary batteries - relationships between lithium salt concentration and battery performance characteristics’ ECS Electrochemistry Letters, 1, A77-A79 (2012).
[65] S. Seki,* S. Tsuzuki,* K. Hayamizu, Y. Umebayashi, N. Serizawa, K. Takei, H. Miyashiro ‘Comprehensive property of refractive index for room-temperature ionic liquids’ Journal of Chemical Engineering Data, 57, 2211-2216 (2012).
[64] S. Seki,* N. Serizawa, K. Hayamizu, S. Tsuzuki, Y. Umebayashi, K. Takei, H. Miyashiro ‘Physicochemical and electrochemical properties of 1-ethyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate and 1-ethyl-3-methylimidazolium tetracyanoborate’ Journal of The Electrochemical Society, 159, A967-A971 (2012).
[63] T. Sakanoue,* K. Sawabe, Y. Yomogida, T. Takenobu, S. Seki, S. Ono* ‘Optically pumped amplified spontaneous emission in an ionic liquid-based polymer light-emitting electrochemical cell’ Applied Physics Letters, 100, 263301 (2012).
[62] T. Yamaguchi,* K. Mikawa, S. Koda, N. Serizawa, S. Seki, K. Fujii, Y. Umebayashi ‘Effects of lithium salts on shear relaxation spectra of pyrrolidinium-based ionic liquids’ The Journal of Physical Chemistry B, 116, 7322-7327 (2012).

2011

[61] Y. Umebayashi,* H. Hamano, S. Seki, B. Minofar, K. Fujii, K. Hayamizu, S. Tsuzuki, Y. Kameda, S. Kohara, M. Watanabe ‘Liquid structure of and Li+ ion solvation in bis(trifluoromethanesulfonyl)amide based ionic liquids composed of 1-ethyl-3-methylimidazolium and N-methyl-N-propylpyrrolidinium cations’ The Journal of Physical Chemistry B, 115, 12179-12191 (2011).
[60] K. Hayamizu,* S. Tsuzuki, S. Seki, Y. Umebayashi ‘Nuclear magnetic resonance studies on the rotational and translational motions of ionic liquids composed of 1-ethyl-3-methylimidazolium cation and bis(trifluoromethanesulfonyl)amide and bis(fluorosulfonyl)amide anions and their binary systems including lithium salts’ Journal of Chemical Physics, 135, 084505 (2011).
[59] K. Yoshida, M. Nakamura, Y. Kazue, N. Tachikawa, S. Tsuzuki, S. Seki, K. Dokko, M. Watanabe* ‘Oxidative-stability enhancement and charge transport mechanism in glyme-lithium salt equimolar complexes’ Journal of the American Chemical Society, 133, 13121-13129 (2011).
[58] N. Serizawa,* S. Seki, S. Tsuzuki, K. Hayamizu, Y. Umebayashi, K. Takei, H. Miyashiro ‘Physicochemical and electrochemical properties of room-temperature ionic liquids composed of cations with N-P bonds and their application in lithium secondary battery’ Journal of The Electrochemical Society, 158, A1023-A1070 (2011).
[57] S. Seki,* K. Takei, H. Miyashiro, M. Watanabe ‘Physicochemical and electrochemical properties of glyme-LiN(SO2F)2 complex for safe lithium-ion secondary battery electrolyte’ Journal of The Electrochemical Society, 158, A769-A774 (2011).
[56] K. Hayamizu,* S. Tsuzuki, S. Seki ‘Temperature-dependent 11B spin?lattice relaxation time for BF4 and CF3BF3 anions in room-temperature ionic liquids’ Magnetic Resonance in Chemistry, 49, 6-8 (2011).
[55] K. Hayamizu,* S. Tsuzuki, S. Seki ‘Temperature-dependent 11B spin?lattice relaxation time for BF4 and CF3BF3 anions in room-temperature ionic liquids’ Magnetic Resonance in Chemistry, 49, 6-8 (2011).

2010

[54] S. Tsuzuki,* K. Hayamizu, S. Seki* ‘Origin of the low-viscosity of [emim][(FSO2)2N] ionic liquid and its lithium salt mixture: Experimental and theoretical study of self-diffusion coefficients, conductivities, and intermolecular interactions’ The Journal of Physical Chemistry B, 114, 16329-16336 (2010).
[53] K. Hayamizu,* S. Tsuzuki, S. Seki, K. Fujii, M. Suenaga, Y. Umebayashi ‘Studies on the translational and rotational motions of ionic liquids composed of N-methyl-N-propyl-pyrrolidinium (P13) cation and bis(trifluoromethanesulfonyl)amide and bis(fluorosulfonyl)amide anions and their binary systems including lithium salts’ Journal of Chemical Physics, 133, 194505 (2010).
[52] Y. Umebayashi,* S. Mori, K. Fujii, S. Tsuzuki,* S. Seki, K. Hayamizu, S. Ishiguro ‘Raman spectroscopic studies and ab initio calculations on conformational isomerism of 1-butyl-3-methylimidazolium bis-(trifluoromethanesulfonyl)amide solvated to a lithium ion in ionic liquids: Effects of the second solvation sphere of the lithium ion’ The Journal of Physical Chemistry B, 114, 6513-6521 (2010).
[51] S. Seki,* T. Kobayashi, N. Serizawa, Y. Kobayashi, K. Takei, H. Miyashiro, K. Hayamizu, S. Tsuzuki, T. Mitsugi, Y. Umebayashi, M. Watanabe ‘Electrolyte properties of 1-alkyl-2,3,5-trimethylpyrazolium cation-based room-temperature ionic liquids for lithium secondary batteries’ Journal of Power Sources, 195, 6207-6211 (2010).
[50] T. Kobayashi,* S. Seki, Y. Mita, H. Miyashiro, N. Terada, T. Kojima ‘AC impedance analysis for 10 Ah-class lithium-ion batteries’ Electrochemistry, 78, 416-419 (2010).
[49] Y. Mita,* S. Seki, N. Terada, N. Kihira, K. Takei, H. Miyashiro ‘Accelerated test methods for life estimation of high-power lithium-ion batteries’ Electrochemistry, 78, 384-386 (2010).
[48] S. Seki,* T. Kobayashi, Y. Kobayashi, K. Takei, H. Miyashiro, K. Hayamizu, S. Tsuzuki, T. Mitsugi, Y. Umebayashi ‘Effects of cation and anion on physical properties of room-temperature ionic liquids’ Journal of Molecular Liquids, 152, 9-13 (2010).

2009

[47] Y. Umebayashi, J-C. Jiang, K-H. Lin, Y-L. Shan, K. Fujii, S. Seki, S. Ishiguro, S. H. Lin, H-C. Chang* ‘Solvation and microscopic properties of ionic liquid/acetonitrile mixtures probed by high-pressure infrared spectroscopy’ Journal of Chemical Physics, 130, 234502 (2009).
[46] S. Ono,* K. Miwa, S. Seki, J. Takeya ‘High-performance organic field-effect transistors with binary ionic liquids’ Organic Electronics, 10, 1579-1582 (2009).
[45] S. Ono,* K. Miwa, S. Seki, J. Takeya ‘High-performance organic field-effect transistors with ionic liquids’ Electrochemistry, 77, 617-619 (2009).
[44] S. Seki,* N. Kihira, T. Kobayashi, Y. Kobayashi, Y. Mita, K. Takei, H. Miyashiro, S. Kuwabata ‘Functionalized room-temperature ionic liquids for lithium secondary battery electrolyte materials’ Electrochemistry, 77, 690-692 (2009).
[43] A. Usami,* S. Seki, Y. Mita, H. Kobayashi, H. Miyashiro, N. Terada ‘Temperature dependence of open-circuit voltage in dye-sensitized solar cells’ Solar Energy Materials and Solar Cells, 93, 840-842 (2009).
[42] S. Seki,* K. Hayamizu, S. Tsuzuki, K. Fujii, Y. Umebayashi, T. Mitsugi, T. Kobayashi, Y. Ohno, Y. Kobayashi, Y. Mita, H. Miyashiro, S. Ishiguro ‘Relationships between center atom species (N, P) and ionic conductivity, viscosity, density, self-diffusion coefficient of quaternary cation room-temperature ionic liquids’ Physical Chemistry Chemical Physics, 11, 3509-3514 (2009).
[41] Y. Umebayashi,* T. Mitsugi, K. Fujii, S. Seki, K. Chiba, H. Yamamoto, J. N. C. Lopes,* A. A. H. Padua,* M. Takeuchi, R. Kanzaki, S. Ishiguro ‘Raman spectroscopic study, DFT calculations and MD simulations on the conformational isomerism of N-alkyl-N-methylpyrrolidinium bis-(trifluoromethanesulfonyl) amide ionic liquids’ The Journal of Physical Chemistry B, 113, 4338-4346 (2009).
[40] Y. Umebayashi, J-C. Jiang, Y-L. Shan, K-H. Lin, K. Fujii, S. Seki, S. Ishiguro, S. H. Lin, H-C. Chang* ‘Structural change of ionic association in ionic liquid/ water mixtures: A high-pressure infrared spectroscopic study’ Journal of Chemical Physics, 130, 124503 (2009).
[39] G. Kobayashi, A. Yamada,* S. Nishimura, R. Kanno, Y. Kobayashi, S. Seki, Y. Ohno, H. Miyashiro ‘Systematic shift of the M3+/M2+ (M = Mn, Fe) redox potential and their kinetics in Lix(MnyFe1-y)PO4’ Journal of Power Sources, 189, 397-401 (2009).
[38] S. Ono,* K. Miwa, S. Seki, J. Takeya* ‘A comparative study of organic single-crystal transistors gated with various ionic-liquid electrolytes’ Applied Physics Letters, 94, 063301 (2009).

2008

[37] T. Uemura, R. Hirahara, Y. Tominari, S. Ono, S. Seki, J. Takeya* ‘Electronic functionalization of solid-to-liquid interfaces between organic semiconductors and ionic liquids: Realization of very high performance organic single-crystal transistors’ Applied Physics Letters, 92, 263305 (2008).
[36] K. Hayamizu,* S. Tsuzuki, S. Seki ‘Molecular motions and ion diffusions of the room-temperature ionic liquid 1,2-dimethyl-3-propylimidazolium bis(trifluoromethylsulfonyl)amide (DMPImTFSA) studied by1H, 13C, and 19F NMR ’ The Journal of Physical Chemistry A, 112, 12027-12036 (2008).
[35] A. Shirai, K. Fujii, S. Seki, Y. Umebayashi, S. Ishiguro, Y. Ikeda* ‘Solvation of lithium ion in N,N-diethyl-N-methyl-N-(2-methoxyethyl)ammonium bis(trifluoromethanesulfonyl)amide using raman and multinuclear NMR spectroscopy’ Analytical Sciences, 24, 1291-1296 (2008).
[34] S. Seki,* Y. Umebayashi, S. Tsuzuki, K. Hayamizu, Y. Kobayashi, Y. Ohno, T. Kobayashi, Y. Mita, H. Miyashiro, N. Terada, S. Ishiguro ‘Phase transition and conductive acceleration of phosphonium-cation based room-temperature ionic liquid’ Chemical Communications, 5541-5543 (2008).
[33] S. Seki,* Y. Kobayashi, H. Miyashiro, Y. Ohno, Y. Mita, N. Terada, P. Charest, A. Guerfi, K. Zaghib ‘Compatibility of N-methyl-N-propylpyrrolidinium cation room-temperature ionic liquid electrolytes and graphite electrodes’ The Journal of Physical Chemistry C, 112, 16708-16713 (2008).
[32] K. Fujii, S. Seki, S. Fukuda, T. Takamuku, S. Kohara, Y. Kameda, Y. Umebayashi, S. Ishiguro* ‘Liquid structure and conformation of a low-viscosity ionic liquid, N-methyl-N-propyl-pyrrolidinium bis(fluorosulfonyl) imide studied by high-energy X-ray scattering’ Journal of Molecular Liquids, 143, 64-69 (2008).
[31] Y. Kobayashi,* S. Seki, Y. Mita, Y. Ohno, H. Miyashiro, P. Charest, A. Guerfi, K. Zaghib ‘High reversible capacities of graphite and SiO/graphite with solvent-free solid polymer electrolyte for lithium-ion batteries’ Journal of Power Sources, 185, 542-548 (2008).
[30] S. Tsuzuki,* K. Hayamizu, S. Seki, Y. Ohno, Y. Kobayashi, H. Miyashiro ‘Quaternary ammonium room-temperature ionic liquid including an oxygen atom in side chain / lithium salt binary electrolytes: Ab initio molecular orbital calculations of interactions between ions’ The Journal of Physical Chemistry B, 112, 9914-9920 (2008).
[29] S. Seki,* Y. Kobayashi, H. Miyashiro, Y. Ohno, Y. Mita, A. Usami, N. Terada, K. Hayamizu, S. Tsuzuki, M. Watanabe ‘Quaternary ammonium room-temperature ionic liquid / lithium salt binary electrolytes: Electrochemical study’ Journal of The Electrochemical Society, 155, A421-A427 (2008).
[28] S. Ono,* S. Seki, R. Hirahara, Y. Tominari, J. Takeya ‘High-mobility, low-power, and fast-switching organic field-effect transistors with ionic liquids’ Applied Physics Letters, 92, 103313 (2008).
[27] K. Hayamizu,* S. Tsuzuki, S. Seki, Y. Ohno, H. Miyashiro, Y. Kobayashi ‘Quaternary ammonium room-temperature ionic liquid including an oxygen atom in side chain / lithium salt binary electrolytes: Ionic conductivity and 1H, 7Li, and 19F NMR studies on diffusion coefficients and local motions’ The Journal of Physical Chemistry B, 112, 1189-1197 (2008).
[26] Y. Kobayashi,* Y. Mita, S. Seki, Y. Ohno, H. Miyashiro, M. Nakayama, M. Wakihara ‘Configurational entropy of lithium manganese oxide and related materials, LiCryMn2-yO4 (y=0, 0.3)’ Journal of The Electrochemical Society, 155, A14-A19 (2008).

2007

[25] T. Nakamura,* K. Sakumoto, M. Okamoto, S. Seki, Y. Kobayashi, T. Takeuchi, M. Tabuchi, Y. Yamada ‘Electrochemical study on Mn2+-substitution in LiFePO4 olivine compound’ Journal of Power Sources, 174, 435-441 (2007).
[24] K. Fujii, S. Seki, S. Fukuda, R. Kanzaki, T. Takamuku, Y. Umebayashi, S. Ishiguro* ‘Anion conformation of low-viscosity room-temperature ionic liquid, 1-ethyl-3-methylimidazolium bis(fluorosulfonyl) imide’ The Journal of Physical Chemistry B, 111, 12829-12833 (2007).
[23] T. Nakamura,* K. Sakumoto, S. Seki, Y. Kobayashi, M. Tabuchi, Y. Yamada ‘Apparent diffusion constant and electrochemical reaction in LiFe1-xMnxPO4 olivine cathodes’ Journal of The Electrochemical Society, 154, A1118-A1123 (2007).
[22] S. Seki,* Y. Mita, H. Tokuda, Y. Ohno, A. Usami, Y. Kobayashi, M. Watanabe, N. Terada, H. Miyashiro ‘Effects of alkyl chain in imidazolium-type room-temperature ionic liquids as lithium secondary battery electrolytes’ Electrochemical and Solid-State Letters, 10, A237-A240 (2007).
[21] Y. Kobayashi, Y. Mita,* S. Seki, Y. Ohno, H. Miyashiro, N. Terada ‘Comparative study of lithium secondary batteries using nonvolatile safety electrolytes’ Journal of The Electrochemical Society, 154, A677-A681 (2007).
[20] S. Seki,* Y. Ohno, Y. Kobayashi, H. Miyashiro, A. Usami, Y. Mita, H. Tokuda, M. Watanabe, K. Hayamizu, S. Tsuzuki, M. Hattori, N. Terada ‘Imdazolium-based room-temperature ionic liquid for lithium secondary batteries ? Effects of lithium salt concentration’ Journal of The Electrochemical Society, 154, A173-A177 (2007).

2006

[19] K. Hayamizu,* S. Seki, H. Miyashiro, Y. Kobayashi ‘Direct in situ observation of dynamic transport for electrolyte components by NMR combined with electrochemical measurements’ The Journal of Physical Chemistry B, 110, 22302-22305 (2006).
[18] S. Seki,* Y. Kobayashi, H. Miyashiro, Y. Ohno, A. Usami, Y. Mita, N. Kihira, M. Watanabe, N. Terada ‘Lithium secondary batteries using modified-imidazolium room-temperature ionic liquid’ The Journal of Physical Chemistry B, 110, 10228-10230 (2006).
[17] S. Seki,* Y. Kobayashi, H. Miyashiro, A. Usami, Y. Mita, N. Terada, T. Iwahori ‘Improvement in high-voltage performance of all-solid-state lithium polymer batteries by mixing inorganic electrolyte with cathode materials’ Journal of The Electrochemical Society, 153, A1073-A1076 (2006).
[16] H. Tokuda, S. Tabata, S. Seki, M. Watanabe* ‘Design of polymer electrolytes to realize high lithium-ionic conductivity with fast charge-transfer reaction’ Kobunshi Ronbunshu, 63, 1-10 (2006).
[15] H. Miyashiro,* Y. Kobayashi, S. Seki, Y. Ohno ‘Research and development of all-solid-state lithium polymer secondary batteries’ Kobunshi Ronbunshu, 63, 139-148 (2006).
[14] H. Miyashiro,* Y. Kobayashi, T. Nakamura, S. Seki, Y. Mita, A. Usami ‘Basic properties of all-solid-state lithium polymer secondary batteries using LiFePO4’ Electrochemistry, 74, 321-325 (2006).
[13] S. Seki,* Y. Kobayashi, H. Miyashiro, Y. Ohno, Y. Mita, A. Usami, M. Watanabe, N. Terada ‘Highly reversible lithium metal secondary battery using the room temperature ionic liquid / lithium salt mixture and surface-coated cathode active material’ Chemical Communications, 544-545 (2006).
[12] H. Miyashiro,* A. Yamanaka, M. Tabuchi, S. Seki, M. Nakayama, Y. Ohno, Y. Kobayashi, Y. Mita, A. Usami, M. Wakihara ‘Improvement of degradation at elevated temperature and at high SOC storage by ZrO2 coating on LiCoO2’ Journal of The Electrochemical Society, 153, A348-A353 (2006).

2005

[11] H. Miyashiro,* Y. Kobayashi, S. Seki, Y. Mita, A. Usami, M. Nakayama, M. Wakihara ‘Fabrication of all-solid-state lithium polymer secondary batteries using Al2O3-coated LiCoO2’ Chemistry of Materials, 17, 5603-5605 (2005).
[10] H. Miyashiro,* S. Seki, Y. Kobayashi, Y. Ohno, Y. Mita, A. Usami ‘All-solid-state lithium polymer secondary battery with LiNi0.5Mn1.5O4 by mixing of Li3PO4’ Electrochemistry Communications, 7, 1083-1086 (2005).
[9] M. Tabuchi,* A. Nakashima, K. Ado, H. Sakaebe, H. Kobayashi, H. Kageyama, K. Tatsumi, Y. Kobayashi, S. Seki, A. Yamanaka ‘The effect of preparation condition and dopant on the electrochemical property for Fe-substituted Li2MnO3’ Journal of Power Sources, 146, 287-293 (2005).
[8] Y. Kobayashi,* S. Seki, A. Yamanaka, H. Miyashiro, Y. Mita, T. Iwahori ‘Development of high-voltage and high-capacity all-solid-state lithium secondary batteries’ Journal of Power Sources, 146, 719-722 (2005).
[7] S. Seki,* Y. Kobayashi, H. Miyashiro, A. Yamanaka, Y. Mita, T. Iwahori ‘Degradation mechanism analysis of all solid-state lithium polymer secondary batteries by using the impedance measurement’ Journal of Power Sources, 146, 741-744 (2005).
[6] S. Seki,* Y. Kobayashi, H. Miyashiro, Y. Ohno, Y. Mita, A. Usami, N. Terada, M. Watanabe ‘Reversibility of lithium secondary battery using room temperature ionic liquid and lithium metal’ Electrochemical and Solid-State Letters, 8, A577-A578 (2005).
[5] Y. Kobayashi,* S. Seki, M. Tabuchi, H. Miyashiro, Y. Mita, T. Iwahori ‘High-performance genuine lithium polymer battery obtained by fine-ceramic-electrolyte coating of LiCoO2’ Journal of The Electrochemical Society, 152, A1985-A1988 (2005).
[4] S. Seki,* Y. Kobayashi, H. Miyashiro, Y. Mita, T. Iwahori ‘Fabrication of high-voltage, high-capacity all-solid-state lithium polymer secondary batteries by application of polymer electrolyte / inorganic electrolyte composite concept’ Chemistry of Materials, 17, 2041-2045 (2005).
[3] S. Seki, M. A. B. H. Susan, T. Kaneko, H. Tokuda, A. Noda, M. Watanabe* ‘Distinct difference in ionic transport behavior in polymer electrolytes depending on matrix polymers and incorporated salts’ The Journal of Physical Chemistry B, 109, 3886-3892 (2005).

2004

[2] S. Seki, S. Tabata, S. Matsui, M. Watanabe* ‘Effect of binder polymer structures used in composite cathodes on interfacial charge transfer processes in lithium polymer batteries’ Electrochimica Acta, 50, 379-383 (2004).

2003

[1] S. M. A. Karim, R. Nomura, F. Sanda, S. Seki, M. Watanabe, T. Masuda* ‘Synthesis and properties of ion-conducting poly(anthrylacetylene) derivatives’ Macromolecules, 36, 4786-4789 (2003).

著書

[6] S. Seki, S. Ono, N. Serizawa, Y. Umebayashi, S. Tsuzuki, K. Ueno, M. Watanabe RSC book, Smart Material Series, Ionic Liquid Devices, Chapter 14 (2018).
[5] K. Fujii，S. Seki，H. Doi，Y. Umebayashi Ionic Liquids: Electrochemical Fundamentals and Applications, Springer, Chapter 10 (2015).
[4] S. Seki，M. Watanabe New Frontiers in Electrochemical Sciences and Technology, Springer, Chapter 6 (2013).
[3] 関志朗リチウムイオン電池の部材開発と用途別応用, シーエムシー出版、第3章1項 (2011).
[2] Y. Kobayashi, S. Seki, N. Terada Encyclopedia of Electrochemical Power Sources, Elsevier, pp375-382, (2009).
[1] 関志朗、宮代一最新リチウムイオン二次電池　～安全性向上および高機能化に向けた材料開発,、情報機構、第3章第3節第3項.

総説・解説

[12] 関志朗、高橋圭太朗、平岡紘次、釜谷美則、高羽洋充、梅林泰弘高性能蓄電池の開発に資する分析・分光技術, Jasco Report, pp20-28, 64/1 (2022)
[11] 澤橋保、関志朗従来の電池容量を凌駕するリチウム硫黄電池の開発及び全固体電池への挑戦, 鉱山, pp17-25, 800 (2022)
[10] 関　志朗、高橋　圭太朗、石野　優貴、宮内　響大容量蓄電を実現するリチウム硫黄電池の開発及び電解質の固体化による全固体電池への展開, 化学工業, pp386-390, 72/6 (2021)
[9] 関志朗、高橋圭太朗、石野優貴、加藤優輝、平岡紘次、齊藤貴洋、高羽洋充、渡邉正義目的・用途に応じた高性能蓄電池用電解質の設計, 分離技術, pp236-240, 20 (2018)
[8] 関志朗, 渡邉正義安全性の向上に資する固体電解質を用いたリチウム二次電池, 膜, pp108-113, 38 (2013)
[7] 小野新平，坂上知，関志朗イオン液体を利用した有機半導体デバイスの開発，表面科学, pp204-209, 34 (2013).
[6] 関志朗，渡邉正義安全性の向上に資する固体電解質を用いたリチウム二次電池，膜, pp108-113, 38 (2013).
[5] 関志朗，芹澤信幸，小野新平イオン液体を用いた電気化学デバイスの研究・開発，化学工業, pp101-106, 64 (2013).
[4] 関志朗多様な分子構造を有するイオン液体のリチウム二次電池への適用，化学工業, pp827-833, 62 (2011).
[3] 関志朗，小野新平，小林陽，宮代一，早水紀久子，都築誠二，渡邉正義電気化学デバイス用途へのイオン液体の研究・開発，溶融塩及び高温化学, pp266-274, 51 (2008).
[2] 関志朗，宮代一，三田裕一高安全・高性能電池を実現する「イオン液体」，OHM, pp2-3 (2007).
[1] 関志朗，川野竜司，渡邉正義イオン液体とクリーンエネルギー変換・貯蔵，化学と工業, pp760-763, 9 (2006).

受賞歴

[5] 第一回エヌエフ基金　研究開発奨励賞 (2013).
[4] 電力中央研究所　材料科学研究所　所長表彰 (2012).
[3] 社団法人電気化学会進歩賞・佐野賞 (2011).
[2] 社団法人電気化学会論文賞 (2010).
[1] 社団法人電気化学会溶融塩委員会溶融塩奨励賞 (2008).

研究成果：関 志朗

IF付き学術論文

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

著書

総説・解説

受賞歴

研究成果：関志朗