CVClient

松尾 吉晃

マツオ ヨシアキ  (Yoshiaki Matsuo)

基本情報

所属
兵庫県立大学 大学院 工学研究科 応用化学専攻 教授
学位
博士(工学)(京都大学)

J-GLOBAL ID
200901041808616048
researchmap会員ID
1000195336

外部リンク

経歴

 1

委員歴

 11

論文

 140
  • Junichi Inamoto, Shoya Enoki, Tatsuki Miyamoto, Akane Inoo, Yoshiaki Matsuo
    ACS Applied Energy Materials 2024年11月25日  
  • Yoshiaki Matsuo, Akane Inoo, Junichi Inamoto
    ChemistryOpen 2024年8月  査読有り招待有り
    <jats:title>Abstract</jats:title><jats:p>In this review, fundamental aspects of the electrochemical intercalation of anions into graphite have been first summarized, and then described the electrochemical preparation of covalent‐type GICs and application of graphite as the cathode of dual‐ion battery. Electrochemical overoxidation of anion GICs provides graphite oxide and covalent‐fluorine GICs, which are key functional materials for various applications including energy storage devices. The reaction conditions to obtain fully oxidized graphite has been mentioned. Concerning the application of graphite for the cathode of dual‐ion battery, it stably delivers about 110 mA h g<jats:sup>−1</jats:sup> of reversible capacity in usual organic electrolyte solutions. The combination of anion and solvent as well as the concentration of the anions in the electrolyte solutions greatly affect the performance of graphite cathode such as oxidation potential, rate capability, cycling properties, etc. The interfacial phenomenon is also important, and fundamental studies of charge transfer resistance, anion diffusion coefficient, and surface film formation behavior have also been summarized. The use of smaller anions, such as AlCl<jats:sub>4</jats:sub><jats:sup>−</jats:sup>, Br<jats:sup>−</jats:sup> can increase the capacity of graphite cathode. Several efforts on the structural modification of graphite and development of electrolyte solutions in which graphite cathode delivers higher capacity were also described.</jats:p>
  • Junichi Inamoto, Shoya Enoki, Akane Inoo, Noriyuki Tamura, Yoshiaki Matsuo
    Carbon 216 118512-118512 2024年1月14日  査読有り
  • Akira Heya, Akinori Fujibuchi, Masahiro Hirata, Yoshiaki Matsuo, Junichi Inamoto, Kazuhiro KANDA, Koji Sumitomo
    Japanese Journal of Applied Physics 2023年11月16日  査読有り
    <jats:title>Abstract</jats:title> <jats:p>The effects of soft X-ray irradiation and atomic hydrogen annealing (AHA) on the reduction of graphene oxide (GO) to obtain graphene were investigated. To clarify the interaction between soft X-rays and GO, soft X-rays of 300 eV and 550 eV were used for C 1s and O 1s inner-shell electron excitation, respectively at the NewSUBARU synchrotron radiation facility. Low-temperature reduction of the GO film was achieved by using soft X-ray at temperatures below 150 °C at 300 eV, and 60 °C at 550 eV. O-related peaks in X-ray photoelectron spectroscopy, such as the C–O–C peak, were smaller at 550 eV than those at 300 eV. This result indicates that excitation of the core–shell electrons of O enhances the reduction of GO. Soft X-rays preferentially break C–C and C–O bonds at 300 and 550 eV, respectively.</jats:p>
  • Junichi Inamoto, Koki Aga, Akane Inoo, Yoshiaki Matsuo
    Journal of The Electrochemical Society 2023年6月1日  査読有り
    <jats:title>Abstract</jats:title> <jats:p>Graphene-like graphite (GLG) is a promising anode material for sodium-ion batteries, and is believed to have unique kinetic properties compared to hard carbon due to its different intercalation mechanism. In this study, electrochemical impedance spectroscopy was used to investigate the kinetic properties of sodium-ion intercalation in GLG. Our results indicate that the activation energies for interfacial sodium-ion transfer in GLGs were nearly identical to those reported for graphite, regardless of the heat treatment temperature applied to the GLGs. Furthermore, these activation energies were lower than those observed for hard carbon, suggesting better sodium-ion intercalation kinetics. In addition, the diffusion coefficient of sodium ions in the GLG was similar to that of graphite, with the highest value observed for GLG800, the GLG heat-treated at the highest temperature of 800°C. This may indicate that the diffusion coefficient increases with the presence of nanopores in the graphene layer of GLG. It has also been reported that GLG800 is superior in terms of reversible capacity and working potential compared to GLGs synthesized at other temperatures. Consequently, the results clearly demonstrate that GLG800 has the best electrochemical properties in terms of both thermodynamics and kinetics among the GLGs investigated in this study.</jats:p>

MISC

 39

書籍等出版物

 9

講演・口頭発表等

 8

担当経験のある科目(授業)

 5

共同研究・競争的資金等の研究課題

 21