ABE Yusuke

写真a

Affiliation

Graduate School of Engineering Science  Department of Mathematical Science and Electrical-Electronic-Computer Engineering  Electrical and Electronic Engineering Course 

Mail Address

E-mail address

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Research Interests 【 display / non-display 】

  • Energy storage and conversion

  • Secondary battery

  • Lithium-ion battery

  • Biomass

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Graduating School 【 display / non-display 】

  • 2013.04
    -
    2017.03

    Akita University   Faculty of Engineering and Resource Science   Department of Electrical and Electronic Engineering   Graduated

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Graduate School 【 display / non-display 】

  • 2021.04
    -
    2023.09

    Akita University    Doctor's Degree Program  Completed

  • 2017.04
    -
    2019.03

    Akita University  Graduate School, Division of Science and Engineering  Department of Mathematical Science and Electrical-Electronic-Computer Engineering  Master's Degree Program  Completed

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Degree 【 display / non-display 】

  • Akita University -  Master (Engineering)

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Campus Career 【 display / non-display 】

  • 2024.04
    -
    Now

    Akita University   Graduate School of Engineering Science   Department of Mathematical Science and Electrical-Electronic-Computer Engineering   Electrical and Electronic Engineering Course   Assistant Professor  

  • 2021.04
    -
    2024.03

    Akita University   the Joint Research Center for Electric Architecture   Specially-appointed Assistant Professor  

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Research Areas 【 display / non-display 】

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Power engineering  / Secondary battery

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Qualification acquired 【 display / non-display 】

  • Electric Works Specialist (third kind)

  • Energy Manager (heat management and electricity management)

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Research Achievements 【 display / non-display 】

    ◆Original paper【 display / non-display 】

  • High-current-density cyclability of lithium-ion batteries with LiCoO2/LiMn0.6Fe0.4PO4 composite cathodes

    Yusuke Abe, Cheng Jie Chng, Seiji Kumagai

    Journal of Appled Electrochemistry ( SPRINGER NATURE )  56   98   2026.04  [Refereed]

    Research paper (journal)   Domestic Co-author

    Composite cathode active materials serve as remarkable lithium-ion reservoirs to achieve high energy density, high power, and cyclic durability in lithium-ion batteries (LIBs). In this study, the cycling stability of LIBs was investigated using composite cathodes fabricated by mixing LiCoO2 and LiMn0.6Fe0.4PO4 at different active material mass ratios. For composite cathodes with a LiCoO2 content > 40, the corresponding LIBs exhibited excellent cycle stability and high average working potential. In particular, for the composite cathode containing a balanced mass ratio of LiCoO2 and LiMn0.6Fe0.4PO4 (i.e., 40:40) the corresponding LIB achieved 81% specific energy retention (~ 200 Wh kg− 1), even after 500 charge–discharge cycles under high-current-density conditions (i.e., 8 C cycling). This was attributed to the modulation of the lithium-ion deintercalation/intercalation depth in LiCoO2 upon mixing with LiMn0.6Fe0.4PO4, thereby limiting the process to a shallower depth, and suppressing LiCoO2 degradation in the composite cathode. The combination of the high working potential of LiCoO2 and the ~ 4.1 V-class working potential derived from the manganese oxidation–reduction of LiMn0.6Fe0.4PO4 led to a sustained high cell voltage, contributing to a high specific energy in the corresponding LIB. Overall, these results reveal that a blend strategy is effective in the development of high-power LIBs with enhanced cycling stability.

    DOI

  • Thermally Controlled Dual Stabilization Mechanisms of Modified Kenaf-Derived Lignin-Based Aqueous Binders for Silicon Electrodes

    Tasuki Hozumi , Reiichi Chiba, Masanori Ikeda, Daisuke Tashima , Yusuke Abe, Seiji Kumagai, Takuya Egcuhi

    Sustainable Energy & Fuels ( ROYAL SOCIETY OF CHEMISTRY )    2026.03  [Refereed]

    Research paper (journal)   Domestic Co-author

    Silicon (Si) is a promising anode material for lithium-ion batteries due to its high lithium storage capacity; however, severe volume expansion during charge–discharge cycling causes electrode degradation and rapid capacity fading. While binders are essential for maintaining electrode integrity, high-performance binders are often costly, complex to process, and dependent on organic solvents. Aqueous binders derived from natural polymers therefore represent attractive alternatives in terms of cost, sustainability, and environmental compatibility. Although chemically modified lignin binders are promising for Si electrodes, previous studies have only suggested the existence of two distinct thermal treatment approaches—low- and high-temperature processing—and no study has systematically compared these two methods. Herein, we report a modified kenaf-derived lignin copolymerized with polyacrylamide (KL-PAM) as an aqueous binder for Si electrodes and systematically investigate the effect of thermal treatment temperature on its stabilization mechanisms. Low-temperature-treated KL-PAM electrodes at 200 °C accommodated Si volume expansion through binder flexibility and adhesion, whereas high-temperature-treated electrodes were stabilized by carbonization-induced hardening of KL-PAM, which also enhanced electronic conductivity. As a result, high-temperature-treated electrodes at 600 °C exhibited superior rate capability, while capacity retention was comparable between the two regimes. Intermediate-temperature treatment was ineffective, leading to binder failure. This study clarifies thermally controlled dual stabilization mechanisms of lignin-based binders and provides guidance for the development of sustainable binders for Si electrodes in lithium-ion batteries.

    DOI

  • Fabrication of heat-treated waste solar panel glass/graphite composites as negative electrode active materials for lithium-ion batteries

    Takuya Eguchi, Reiichi Chiba, Tashima Daisuke, Yusuke Abe, Seiji Kumagai

    Journal of Materials Science ( SPRINGER NATURE )  61   8097 - 8109   2026.02  [Refereed]

    Research paper (journal)   Domestic Co-author

    Waste solar panel (WSP) glass powder is mixed with graphite and heat-treated to develop a composite negative electrode active material for lithium-ion batteries (LIBs). WSP was categorized as soda-lime glass with a relatively low softening point of ~ 700 °C. WSP and graphite were heat treated, which promoted sintering, forming a compact and conductive composite structure. Electrochemical tests were performed to compare the potential shifts and redox peaks of the fabricated electrodes. The sintered WSP–graphite (WSPG) exhibited improved Li-ion diffusivity and enhanced electronic conductivity, both of which are essential for achieving stable electrochemical performance. Electrochemical tests showed that heat-treated WSPG electrodes exhibited reduced potential shifts and sharper redox peaks compared to those of untreated samples, indicating more efficient lithiation–delithiation processes. However, excessive heat-treatment temperatures deteriorated the crystallinity of graphite, increasing irreversible capacity and decreasing specific capacity. The WSPG sintered at 1200 °C (WSPG1200) displayed the best electrochemical performance with a high specific capacity of 319 mAh/g. These results indicate that appropriate heat treatment effectively optimizes the balance between particle sintering and structural integrity. Although the specific capacity of WSPG1200 is slightly lower than that of graphite, utilizing waste glass in electrode materials offers an environment-friendly and resource-efficient approach. This study demonstrated the feasibility of upcycling WSP glass into high-performance LIB negative electrode materials, highlighting a sustainable strategy for circular material utilization in energy storage applications.

    DOI

  • Accelerated aging of electric double-layer capacitor cells under increased cell voltage and temperature

    Seiji Kumagai, Yugo Kanamoto, Cheng Jie Chng, Yusuke Abe, Mahmudul Kabir, Takuya Eguchi, Daisuke Tashima

    Journal of Energy Storage ( ELSEVIER )  137   118522   2025.09  [Refereed]

    Research paper (journal)   Domestic Co-author

    Electric double-layer capacitors (EDLCs) have promising automotive applications owing to their high power density, long cycle life, and enhanced safety. To meet the stringent requirements for severe conditions and long lifetimes, their aging behavior under increased applied voltage and operating temperature should be explored. Herein, EDLC cells were evaluated by cycling and floating tests to determine the accelerated aging factors for aging indices (specific capacitance decrease and internal resistance increase) under increased voltage and temperature. The cells were assembled using well-known materials, namely YP-50F activated carbon, polytetrafluoroethylene binder, tetraethylammonium tetrafluoroborate/propylene carbonate non-aqueous electrolyte, and a paper-based separator. The aging tests were performed under standard (3.0 V/25 °C), high-voltage (3.5 V/25 °C), and high-temperature (3.0 V/60 °C) conditions. The specific decrease in specific capacitance and specific increase in internal resistance were proportional to the square roots of the number of cycles and floating time in the early stage of aging (>80 % capacitance decrease and <1.5-fold internal resistance increase). Through linear regression analyses of these relationships, the accelerated aging factors under increased voltage and temperature were determined. The cell voltage increase from 3.0 to 3.5 V accelerated the specific capacitance decrease and internal resistance increase 2.8 and 13.6 times, respectively, in the cycling test and 16.2 and 17.3 times, respectively, in the floating test. Accelerated aging induced by the temperature increase from 25 to 60 °C was moderate in comparison. The floating test under the high-voltage (3.5 V) condition at 25 °C shortened the testing time by ∼1/16.

    DOI

  • Cycling stability of lithium-ion batteries with pressure-treated NCM811 cathodes

    Yusuke Abe, Yuki Kumagai, Mahmudul Kabir, Seiji Kumagai

    Electrochemistry Communications ( ELSEVIER )  178   108002   2025.07  [Refereed]

    Research paper (journal)   Domestic Co-author

    This study developed an effective approach for improving the cycling performance of NCM811-based lithium-ion batteries (LIBs) at a charge rate of 5C. The charge–discharge performance of LIBs with pressure-treated NCM811 cathodes was investigated. The cathode coating, comprising NCM811, acetylene black, and polyvinylidene fluoride, was compressed at pressures of 10–40 MPa. Galvanostatic charge–discharge tests revealed that a treatment pressure of 40 MPa improved the storage performance at ≥5C under the LIB full-cell configuration. After pressure treatment, NCM811-based LIBs exhibited excellent cycling stability over 500 charge–discharge cycles at 5C. After 500 cycles, energy-dispersive X-ray analysis confirmed that the dissolution of transition metals from the NCM811 cathode and their deposition at the graphite anode were inhibited. High-pressure treatment modified the morphology of the NCM811 cathodes, resulting in favorable electrochemical properties. The proposed NCM811 electrodes are promising for the development of power-type LIBs with high energy densities and long cycle lifetimes.

    DOI

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Grant-in-Aid for Scientific Research 【 display / non-display 】

  • Grant-in-Aid for Scientific Research(A)

    Project Year： 2025.04  -  2028.03 

  • Grant-in-Aid for Scientific Research(B)

    Project Year： 2022.04  -  2025.03 

  • Grant-in-Aid for Research Activity start-up

    Project Year： 2021.08  -  2023.03 

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Presentations 【 display / non-display 】

  • Effect of charge-discharge current densities on the cycling stability of lithiumion　batteries with LiCoO2/LiMn0.6Fe0.4PO4 composite active materials

    Yusuke Abe, Yusuke Misawa, Hiroyasu Segawa, Seiji Kumagai

    The 10th Internatinal Conference on Materials Engineering for Resources (ICMR2025 AKITA)  (秋田拠点センターALVE，日本)  2025.10  -  2025.10 

  • Impact of Type of Anode Material on the Charging and Discharging　Performance of Lithium-ion Battery Using Ni-rich Densified Cathode

    Yusuke Abe, Yuki Kumagai, Eito Takahashi, Seiji Kumagai

    The International Council of Electrical Engineering Conference 2024  (北九州国際会議場，日本)  2024.07  -  2024.07 

  • Electrochemical impedance analysis of graphite/hard carbon composite anode for Li-ion capacitor

    チェン　チェン　ジェ，マ　シンウ，安部　勇輔，熊谷　誠治

    2023年電気関係学会東北支部連合大会  (岩手県立大学)  2023.09  -  2023.09 

  • Rice Husk as a Worthful Source of Battery Materials for High-performance Li-ion Battery Anodes

    Yusuke Abe, Masaki Nemoto, Masahiro Tomioka, Seiji Kumagai

    The Ninth International Conference on Materials Engineering for Resources  (オンライン開催（Zoom）)  2021.10  -  2021.10 

  • Rice Husk-based Cathode and Anode Active Materials of Lithium-ion Capacitor

    Seiji Kumagai, Yusuke Abe, Tomoaki Saito, Hiroaki Fujiwara, Naoki Sawa, Takuya Eguchi, Masahiro Tomioka, Mahmudul Kabir, Disuke Tashima

    6th International Conference on Advanced Capacitors  (Ueda, Japan)  2019.11  -  2019.11 

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Academic Activity 【 display / non-display 】

  • 2024.11
    　
    　

  • 2024.06
    　
    　

  • 2023.06
    　
    　

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