Serizawa, Nobuyuki

写真a

Affiliation

Faculty of Science and Technology, Department of Applied Chemistry (Yagami)

Position

Associate Professor

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Career 【 Display / hide 】

  • 2009.04
    -
    2017.03

    Central Research Institute of Electric Power Industry, Materials Science Research Laboratory

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Academic Background 【 Display / hide 】

  • 2003.04
    -
    2007.03

    Keio University, Faculty of Science and Technology, Department of Applied Chemistry

    University, Graduated

  • 2007.04
    -
    2009.03

    Keio University, Graduate School of Science and Technology, School of Science for Open and Environmental Systems

    Graduate School, Completed, Master's course

  • 2012.04
    -
    2015.03

    Keio University, Graduate School of Science and Technology, School of Integrated Design Engineering

    Graduate School, Completed, Doctoral course

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Academic Degrees 【 Display / hide 】

  • 博士（工学）, 慶應義塾大学大学院, Coursework

    水晶振動子電極による局所物性のその場測定を組み合わせたイオン液体中における金属の電気化学的析出・溶解に関する研究

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Research Areas 【 Display / hide 】

  • Nanotechnology/Materials / Energy chemistry

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Research Keywords 【 Display / hide 】

  • Plating

  • Ionic liquids

  • Energy conversion & storage

  • Electrochemistry

  • Battery

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Books 【 Display / hide 】

  • イオン液体の実用展開に向けた最新動向

    芹澤信幸，片山 靖, シーエムシー出版, 2022.08

    Scope: イオン液体中におけるレドックス反応と電池への応用,  Contact page： 106-113

  • Lithium Metal Anode

    Tachikawa N., Serizawa N., Katayama Y., Next Generation Batteries: Realization of High Energy Density Rechargeable Batteries, 2021.01

    　View Summary

    Deposition and dissolution of lithium metal have been investigated in an equimolar mixture of lithium bis(trifluoromethylsulfonyl)amide (LiTFSA) and glyme [triglyme (G3) or tetraglyme (G4)] solvate ionic liquid. The limiting current for deposition of lithiumwas not observed probably because of the high concentration of lithium species and a decrease in the local viscosity by the liberation of glyme. On the other hand, the dissolution of lithium was limited due to an increase in the local viscosity by the formation of [Li(TFSA)2]–. The formation of solid electrolyte interphase (SEI) was suggested to form by the cathodic decomposition of the solvate ionic liquids by electrochemical quartz crystal microbalance. Lithium phosphorous oxynitride (LiPON) thin film was found to act as the artificial SEI, which prevented the cathodic decomposition of the solvate ionic liquids and enabled the deposition and dissolution of lithium. The cycle performance of deposition and dissolution of lithiumwas found to be improved by coating a Cu substratewith vapor-grown carbon fiber.

  • Design and New Energy Application of Ionic Liquids

    Seki Shiro, Ono Shimpei, Serizawa Nobuyuki, Umebayashi Yasuhiro, Tsuzuki Seiji, Ueno Kazuhide, Watanabe Masayoshi, The Royal Society of Chemistry, 2018.09

    　View Summary

    <p>New electrochemical application using room-temperature ionic liquids (ILs) are introduced, such as lithium secondary batteries, electrochemical double layer capacitors, and novel types of electrical devices for sustainable and renewal energy society. ILs have so many combinations, owing to many cation/anion species. In this chapter, we introduce properties from fundamental (general and special physicochemical properties) to electrochemical applications of ILs. We also discuss importance of molecular design and application target of ILs.</p>

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Papers 【 Display / hide 】

  • The Local Changes in the Physicochemical Properties during Electrode Reactions in a Chlorocuprate Ionic Liquid

    Serizawa N., Kuwahara S., Li X., Katayama Y.

    Journal of the Electrochemical Society 172 ( 4 )  2025.04

    ISSN  00134651

    　View Summary

    The physicochemical and electrochemical properties of an ionic liquid consisting of the dichlorocuprate anion, [CuCl2]-, were investigated. The equimolar mixture of CuCl and 1-butyl-1-methylpyrrolidinium chloride (BMPCl) was found to yield an ionic liquid at 298 K composed predominantly of BMP+ and [CuCl2]-. Fine deposits of metallic Cu were obtained on a glassy carbon electrode by potentiostatic and galvanostatic reduction of [CuCl2]- in CuCl-BMPCl (50.0-50.0 mol%). The overpotential for Cu nucleation was larger on a glassy carbon electrode than on a Pt electrode. The electrochemical deposition and dissolution of Cu were analyzed using an electrochemical quartz crystal microbalance. The local viscosity and density of the electrolyte near the electrode/electrolyte interface increased during both deposition and dissolution of Cu, probably reflecting the shift in the electrolyte composition to the local basic and acidic conditions, respectively.

  • Formation and Breakdown of the Solid-electrolyte Interphase in a Bis(fluorosulfonyl)amide-based Ionic Liquid in the Presence of Lithium Ion

    Sho Okazaki, Nobuyuki Serizawa, Yasushi Katayama

    Electrochemistry ((公社)電気化学会)  92 ( 4 ) 043006 2024.04

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  13443542

    　View Summary

    The formation and breakdown of the solid electrolyte interphase (SEI) on a Pt electrode were investigated in 1-butyl-1-methylpyrrolidinium bis(fluorosulfonyl)amide (BMPFSA) containing a high concentration of LiFSA using a ferrocene/ferrocenium couple as a redox probe. The formation of the SEI was confirmed at the potential more negative than −1.1 V vs. Ag|Ag(I). However, the SEI was found to disappear at the open circuit potential. The SEI was suggested to form by the dissolution and/or dispersion of the decomposition products in the electrolyte.

  • Electrode Reactions of Copper Species in a Bis(fluorosulfonyl)amide Ionic Liquid

    Nobuyuki Serizawa, Takumi Hisada, Yasushi Katayama

    Electrochemistry ((公社)電気化学会)  92 ( 4 ) 043009 2024.04

    Research paper (scientific journal), Joint Work, Lead author, Corresponding author, Accepted,  ISSN  13443542

    　View Summary

    The electrode reactions of copper species were investigated in an amide-type ionic liquid, 1-butyl-1-methylpyrrolidinium bis(fluorosulfonyl) amide (BMPFSA). The anodic current assignable to the dissolution of Cu to form monovalent Cu(I) complex was observed at −0.42 V vs. Ag|Ag(I). A pair of anodic and cathodic current peaks attributable to Cu(II)/Cu(I) was observed at 0.5 V, suggesting that a 4 V class redox flow battery combined with a Li metal anode is expected using the redox reaction of Cu(II)/Cu(I) in BMPFSA as the cathode reaction. The electrodeposition of Cu and the quasi-reversible redox reaction of Cu(II)/Cu(I) were affected by the electrode materials.

  • Formation and Aging of the Solid Electrolyte Interphase on Lithium in Bis(fluorosulfonyl)amide-Type Ionic Liquids

    Serizawa N., Yamashita R., Katayama Y.

    Journal of Physical Chemistry C (Journal of Physical Chemistry C)  127 ( 22 ) 10434 - 10444 2023.04

    Research paper (scientific journal), Joint Work, Lead author, Corresponding author, Accepted,  ISSN  19327447

    　View Summary

    The formation and aging of the solid electrolyte interphase (SEI) formed on a Li and Cu electrode in two bis(fluorosulfonyl)amide (FSA-)-type ionic liquids (ILs), 1-methyl-1-butylpyrrolidinium bis(fluorosulfonyl)amide and 1-methyl-1-methoxyethylpyrrolidinium bis(fluorosulfonyl)amide, containing a high concentration of LiFSA were investigated using electrochemical impedance spectroscopy, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and scanning electron microscopy. The intensity of peaks corresponding to the decomposition of the electrolyte in XPS spectra changed with time. The thicknesses of the SEI formed on a Cu electrode in both ILs were estimated to be 20-100 nm by TEM observation. The resistance of SEI increased with the lapse of time although the change in the thickness of the SEI was small, suggesting the aging of the SEI in the ILs was considered to depend on the composition of the SEI rather than the thickness of the SEI. The Li deposits shrank during dissolution. The Li anode became sparse and porous after deposition and dissolution cycles, probably due to the inhomogeneous reaction through the aged SEI. The SEI formation on the surface of the porous deposits was considered to lead to an increase in the polarization and the isolation of the deposits, i.e., the formation of “dead lithium”.

  • Redox Reactions of Ag(I)/Ag and Ferrocenium/Ferrocene in 1-Butyl-1-methylpyrrolidinium Bis(fluorosulfonyl)amide Ionic Liquid

    Kato S., Serizawa N., Katayama Y.

    Journal of the Electrochemical Society (Journal of the Electrochemical Society)  170 ( 4 )  2023.04

    ISSN  00134651

    　View Summary

    The electrode reactions of Ag(I)/Ag and ferrocenium/ferrocene (Fc+/Fc) were investigated in an ionic liquid, 1-butyl-1-methylpyrrolidinium bis(fluorosulfonyl)amide (BMPFSA). The potential of Ag(I)/Ag depended on the logarithm of the concentration of Ag(I), as predicted by the Nernst equation, indicating the Ag(I)/Ag can be used as a reference electrode reaction in BMPFSA. The reversible electrode reaction of Fc+/Fc was observed in BMPFSA by cyclic voltammetry. The donor number of BMPFSA was estimated to be 13 from the difference in the formal potentials of Ag(I)/Ag and Fc+/Fc, indicating the coordination ability of FSA- was slightly stronger than that of bis(trifluoromethylsulfonyl)amide (TFSA-). The diffusion coefficients (D) of Fc and Fc+ were (5.7 ± 0.7) and (3.3 ± 0.2) × 10-7 cm2 s-1, respectively. The ratio of D of Fc+ against that of Fc was smaller than those in TFSA--type ionic liquids, reflecting the higher charge density of FSA-. The standard rate constant (k 0) of Fc+/Fc was estimated to be (5.4 ± 1.1) × 10-3 cm s-1. The apparent activation energy for k 0 was close to the activation energy for D, suggesting the electrode reaction of Fc+/Fc can be regarded as the outer sphere electron transfer reaction with a very small reorganization energy.

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Papers, etc., Registered in KOARA 【 Display / hide 】

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Reviews, Commentaries, etc. 【 Display / hide 】

  • Electropolishing and the Mass Transfer During the Electrochemical Anodic Dissolution of Metals in Ionic Liquids

    Nobuyuki Serizawa, Yasushi Katayama

    Journal of the Surface Finishing Society of Japan 73 ( 7 ) 353 - 358 2022.07

    Article, review, commentary, editorial, etc. (scientific journal), Joint Work, Lead author,  ISSN  0915-1869

  • アドミッタンス解析法を用いた電気化学水晶振動子マイクロバランス測定

    芹澤　信幸, 片山　靖

    電気化学 89   292 - 298 2021.09

    Article, review, commentary, editorial, etc. (scientific journal), Joint Work

  • イオン液体中における金属電析と金属ナノ粒子の電解生成

    芹澤　信幸，片山　靖

    電気化学 88 ( 2 ) 121 - 128 2020.06

    Article, review, commentary, editorial, etc. (scientific journal), Joint Work

  • 電気化学QCMによるイオン液体中における金属析出・溶解反応の解析

    Nobuyuki Serizawa, Yasushi Katayama

    表面技術 69 ( 1 ) 10 - 15 2018.01

    Article, review, commentary, editorial, etc. (scientific journal), Joint Work

  • イオン液体を用いた電気化学デバイスの研究・開発

    関 志朗，芹澤信幸，小野新平

    化学工業 64 ( 2 ) 17 - 22 2013.02

    Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media), Joint Work

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Presentations 【 Display / hide 】

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Research Projects of Competitive Funds, etc. 【 Display / hide 】

  • 「基礎電気化学」アプローチによる活イオンリッチ反応場の追跡

    2023.04
    -
    2026.03

    学術変革領域研究(B), Principal investigator

  • Electrochemical quartz crystal microbalance measurements of the electrode reactions in lithium secondary batteries

    2019.04
    -
    2022.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, Grant-in-Aid for Early-Career Scientists , Principal investigator

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Awards 【 Display / hide 】

  • 功労賞

    2022.03, 電気化学会関東支部

    Type of Award： Award from Japanese society, conference, symposium, etc.

  • 溶融塩奨励賞

    2020.11, 電気化学会 溶融塩委員会, リチウムイオンを含むアミド系イオン液体 中におけるニトロキシラジカルの酸化還元反応

    Type of Award： Award from Japanese society, conference, symposium, etc.

  • TAKUMI賞

    2013.11, 電力中央研究所, 水晶振動子の新たな利用法の開拓：電極近傍の電解質イオン液体のダイナミクス解析手法の開発

    Type of Award： Other

  • 国際会議論文発表奨励賞

    2008.12, 慶應義塾大学大学院理工学研究科, EQCM measurement of Ag deposition in an amide-type room-temperature ionic liquid

    Type of Award： Keio commendation etc.

    　View Description

    Pacific Rim Meeting on Electrochemical and Solid-State Science 2008での発表に関する受賞

  • ポスター賞

    2008.03, 社団法人 電気化学会, イミド系室温イオン液体中におけるAg(I)/Ag電極反応

    Type of Award： Award from Japanese society, conference, symposium, etc.

    　View Description

    電気化学会第75回大会におけるポスター発表に関する受賞

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Courses Taught 【 Display / hide 】

  • SEMINAR IN APPLIED CHEMISTRY

    2025

  • NANO SCALE SCIENCE JOINT SEMINAR

    2025

  • MATERIAL DESIGN SCIENCE JOINT SEMINAR

    2025

  • LABORATORIES IN SCIENCE AND TECHNOLOGY

    2025

  • LABORATORIES IN APPLIED CHEMISTRY C

    2025

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Courses Previously Taught 【 Display / hide 】

  • 応用化学実験C

    Keio University

    2017.04
    -
    2018.03
    , 

    Autumn Semester, Laboratory work/practical work/exercise

  • 理工学基礎実験

    Keio University

    2017.04
    -
    2018.03
    , 

    Spring Semester, Laboratory work/practical work/exercise

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Social Activities 【 Display / hide 】

  • サイエンスメンター

    日本科学協会

    2018.09
    -
    2019.08
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Memberships in Academic Societies 【 Display / hide 】

  • 表面技術協会, 

    2018.09
    -
    Present

  • イオン液体研究会, 

    2017.10
    -
    Present

  • 電池技術委員会, 

    2017.06
    -
    Present

  • 溶融塩委員会, 

    2017.06
    -
    Present

  • The lectrochemical Society, 

    2017.04
    -
    Present

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Committee Experiences 【 Display / hide 】

  • 2021.01
    -
    2024.01

    事務局長, 電気化学会溶融塩委員会

  • 2020.12
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    2022.03

    事務局長, 第62回電池討論会実行委員会

  • 2025.03
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    Present

    会誌編集幹事, （公社）電気化学会

  • 2024.03
    -
    2025.03

    会誌編集副幹事, （公社）電気化学会

  • 2022.03
    -
    2024.03

    代議員, 電気化学会

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