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Affiliation |
Graduate School of Engineering Science Department of Mathematical Science and Electrical-Electronic-Computer Engineering Electrical and Electronic Engineering Course |
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Mail Address |
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ABE Yusuke
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Research Interests 【 display / non-display 】
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Energy storage and conversion
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Secondary battery
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Lithium-ion battery
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Biomass
Graduating School 【 display / non-display 】
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2013.04-2017.03
Akita University Faculty of Engineering and Resource Science Department of Electrical and Electronic Engineering Graduated
Graduate School 【 display / non-display 】
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2021.04-2023.09
Akita University Doctor's Degree Program Completed
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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
Campus Career 【 display / non-display 】
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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
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2021.04-2024.03
Akita University the Joint Research Center for Electric Architecture Specially-appointed Assistant Professor
Research Areas 【 display / non-display 】
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Power engineering / Secondary battery
Qualification acquired 【 display / non-display 】
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Electric Works Specialist (third kind)
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Energy Manager (heat management and electricity management)
Thesis for a degree 【 display / non-display 】
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Yusuke ABE
2023.09
Single author
Research Achievements 【 display / non-display 】
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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.
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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.
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Hard carbon/graphite/nano-silicon ternary composite anode for high-performance Li-ion capacitors
Cheng Jie Chng, Yusuke Abe, Seiji Kumagai
Journal of Power Sources ( ELSEVIER ) 642 236930 2025.04 [Refereed]
Research paper (journal) Domestic Co-author
Previously, a hard carbon (HC)/graphite (Gr) composite carbon (CC) anode for Li-ion capacitors (LICs) was noted to demonstrate outstanding cycling and rate performances. In this study, nano-Si was integrated into the CC matrices to develop a high-energy-density ternary composite anode for LICs. A twice-repeated prelithiation method was applied to stabilize the solid electrolyte interphase and eliminate the irreversible capacity of the composite anodes. This approach leveraged the high specific capacity of Si to enhance energy density, the amorphous carbon in HC to buffer the volume expansion of Si during charging, and the high electrical conductivity of Gr to improve rate performance. The ternary composite anodes were subjected to electrochemical characterization across a wider voltage range to maximize their energy density and assess durability under extreme conditions. The optimal CC:nano-Si mass ratio for the composite anode was determined through comparative studies. The composite anode with a CC:nano-Si mass ratio of 80:20 achieved a maximum energy density of 129.3 Wh kg-1 and an outstanding energy density retention rate of 88.4 % after 10,000 cycles at 2.0–4.0 V. The etention rate was 90.1 % after an accelerated aging test involving additional 5000 cycles at 1.5–4.2 V.
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Takuya EGUCHI, Taiki NAGANUMA, Reiichi CHIBA, Kimitaka WATANABE, Yusuke ABE, Seiji KUMAGAI
International Journal of the Society of Materials Engineering for Resources ( 日本素材物性学会 ) 27 ( 1 ) 663 2024.11 [Refereed]
Research paper (journal) Domestic Co-author
Biochar produced from bio-waste of cellulose-extracted kenaf residue was utilized as a conductive additive for electrodes in electric double-layer capacitors (EDLCs). The EDLC cells were assembled using electrodes with varying mixing ratios of kenaf-derived carbon (KC), and hydrocarbons-derived carbon black (CB) which had been industrially utilized as the conductive additive. Although the sole use of KC could not provide a sufficient electronic conduction in the EDLC electrodes, the combinational use of KC and CB attained a formation of stable conductive path therein. The energy density of the EDLC cell utilizing electrodes composed of KC and CB at a mixing ratio of 50:50 in mass under the use of 8 M KOH electrolytic solution and the cell voltage range of 0−1.0 V was found to be approximately equivalent to that of electrodes composed solely of CB, particularly at power densities below 100 W kg−1. Through the application of KC to the conductive electrode additive, we discovered new potential uses for kenaf residue.
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Cheng Jie Chng, Yusuke Abe, Seiji Kumagai
Advanced Energy and Sustainability Research ( WILEY ) 6 ( 1 ) 2400238 2024.09 [Refereed]
Research paper (journal) Domestic Co-author
The current energy density of Li-ion capacitors (LICs) is unfavorable for industrial applications, due to the asymmetrical electrochemical kinetics between the anode and cathode. Herein, the energy density of composite anode materials is increased by optimizing the mass ratio between graphite (Gr) and nano-Si to enable the solid electrolyte interface (SEI) to effectively buffer the large volume changes of Si during lithiation/delithiation. A twice-repeated prelithiation method is used to stabilize the SEI and eliminate the irreversible capacity of the composite anodes. Variation of the Gr:nano-Si mass ratio of the composite anode from 0 to 40 mass% shows that, although the LIC with a Gr:nano-Si mass ratio of 80:20 (Gr80Si20) exhibits the highest energy density (91.9 Wh kg−1), its energy density deteriorates drastically after 10 000 cycles, retaining only 34.8% of its initial energy density. Conversely, the LIC with the composite anode with a Gr:nano-Si mass ratio of 60:40 (Gr60Si40) has slightly lower energy density (87.3 Wh kg−1) but demonstrates outstanding cycling performance with energy density retention of 87.2% after 10 000 cycles. These findings highlight the potential of incorporating Gr/nano-Si composite anodes into LICs for high-energy-density industrial applications.
◆Original paper【 display / non-display 】
Grant-in-Aid for Scientific Research 【 display / non-display 】
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Grant-in-Aid for Scientific Research(A)
Project Year： 2025.04 - 2028.03
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Grant-in-Aid for Scientific Research(B)
Project Year： 2022.04 - 2025.03
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Grant-in-Aid for Research Activity start-up
Project Year： 2021.08 - 2023.03
Presentations 【 display / non-display 】
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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
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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
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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
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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
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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