Výsledky vyhledávání - "Motoyuki Hirooka"

Akademický článek

High Energy Density 'Bezel-less' Lithium-ion Battery Using Solvate Ionic Liquid-based Quasi-solid-state Electrolyte

Autor: Atsushi UNEMOTO, Motoyuki HIROOKA, Eiji SEKI, Jun KAWAJI, Takefumi OKUMURA

Publikováno v: Electrochemistry, Vol 88, Iss 4, Pp 321-324 (2020)

We propose a novel “bezel-less” lithium-ion battery (LIB) structure that enhances the volumetric energy density of LIB. This structure reduces the extra-space volume for seal and accumulation of current collectors, eliminating the bezel part by 1

Externí odkaz: https://doaj.org/article/e6412fd1cb374e969f448177c5bb3be8

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High Energy Density 'Bezel-less' Lithium-ion Battery Using Solvate Ionic Liquid-based Quasi-solid-state Electrolyte

Autor: Eiji Seki, Takefumi Okumura, Atsushi Unemoto, Jun Kawaji, Motoyuki Hirooka

Publikováno v: Electrochemistry, Vol 88, Iss 4, Pp 321-324 (2020)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82f357784b3965485d4e7b83d77939b9
https://doi.org/10.5796/electrochemistry.19-00076

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Local Lithium-Ion Transport of a Ternary Sulfolane-Lithium Bis(trifluoromethanesulfonyl)amide-Carbonate Electrolyte: Experimental and First-Principles Molecular Dynamics Analysis toward Quasi-Solid-State Lithium-Ion Battery

Autor: Jun Kawaji, Atsushi Unemoto, Eiji Seki, Motoyuki Hirooka, Tamio Ikeshoji, Kazuhide Ueno, Kaoru Dokko, Masayoshi Watanabe, Takefumi Okumura

Publikováno v: Journal of The Electrochemical Society. 169:020534

The ion coordination and local ion transport of the ternary electrolyte containing sulfolane (SL), lithium bis(trifluoromethanesulfonyl)amide (LiTFSA), and a carbonate solvent were investigated by combining the electrochemical measurement and first-p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9da056bc8cb3303a676dc57b461b7953
https://doi.org/10.1149/1945-7111/ac5065

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Correlation between capacity loss and increase in polarization in 5 V lithium-insertion material of Li[Ni1/2Mn3/2]O4

Autor: Makoto Eguchi, Kingo Ariyoshi, Motoyuki Hirooka

Publikováno v: Solid State Ionics. 371:115752

The 5 V lithium-insertion material of Li[Ni1/2Mn3/2]O4 (LiNiMO) is a promising positive electrode material for lithium-ion batteries. Therefore, several approaches toward improving the cyclability of LiNiMO have been undertaken. To understand the ori

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b843dbfa8ad730dcc41104493cf5ba9a
https://doi.org/10.1016/j.ssi.2021.115752

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Non-Destructive Analysis of Crystal Structure Changes of Component Materials in Cylindrical Lithium-Ion Batteries at Elevated Temperature By Synchrotron Radiation x-Ray Diffraction Measurement

Autor: Masahiro Shikano, Atsushi Unemoto, Takefumi Okumura, Makoto Abe, Kentaro Kuratani, Ken Okada, Yoshiyasu Saito, Jun Kawaji, Motoyuki Hirooka, Hironori Kobayashi

Publikováno v: ECS Meeting Abstracts. :179-179

Temperature is one of the important factors for lithium-ion battery (LIB) which accelerates degradation of the performance. In many cases, degradation mechanism is studied by post-mortem analysis with destruction of degraded LIBs to obtain their comp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5d8585f629c7a4e03017634ad62eb295
https://doi.org/10.1149/ma2020-022179mtgabs

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Study of Lithium Ion Battery Manufacturing Process Using Quasi-Solid Electrolyte Sheet

Autor: Naoe Kazuaki, Kaga Yusuke, Eiji Seki, Motoyuki Hirooka, Etsuko Nishimura, Amasaki Shimpei

Publikováno v: ECS Meeting Abstracts. :327-327

Introduction In conventional lithium ion battery (LIB), organic electrolyte exhibiting a high volatility and flammability is applied. Therefore, energy storage system with the LIB possesses a lot of auxiliary components for ensuring its safety, which

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::18e40d8cb6c0468c25b9c9617e5c6e17
https://doi.org/10.1149/ma2020-022327mtgabs

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Improvement of float charge durability for LiCoO2 electrodes under high voltage and storage temperature by suppressing O1-Phase transition

Autor: Kingo Ariyoshi, Masayuki Yamada, Takefumi Okumura, Tomohito Sekiya, Yoshitomo Omomo, Motoyuki Hirooka, Yusuke Yamada, Hideaki Katayama

Publikováno v: Journal of Power Sources. 463:228127

To produce electronic devices with high functionality and longer operating times, the energy density of lithium-ion batteries (LIBs) has to be increased while maintaining a long battery life and high reliability. The energy density of LIBs can be inc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c30ccd6e5bb1481237069ac20f9d71a6
https://doi.org/10.1016/j.jpowsour.2020.228127

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Examining the Long-Term Cyclabilities of Li[Ni_1/2Mn_3/2]O_4 and Li[Li_0.1Al_0.1Mn_1.8]O_4 Using a Full-Cell Configuration Including LTO-Counter Electrodes with Extra Capacity

Autor: Kingo Ariyoshi, Motoyuki Hirooka, Makoto Eguchi

Publikováno v: Journal of The Electrochemical Society. 167(6):060532

In this study, a novel cell configuration was developed for evaluating the cyclabilities of lithium insertion materials. In this cell, the Li[Li_1/3Ti_5/3]O_4 (LTO) counter electrode has excess capacity on both the charge and discharge sides (EQ-LTO)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6d5ac95ce3540ac6e58cc473b8f75768
https://dlisv03.media.osaka-cu.ac.jp/il/meta_pub/G0000438repository_19457111-167-6-060532

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Degradation mechanism of LiCoO2 under float charge conditions and high temperatures

Autor: Hideaki Katayama, Yoshitomo Omomo, Yusuke Yamada, Tomohito Sekiya, Takefumi Okumura, Motoyuki Hirooka, Kingo Ariyoshi, Masayuki Yamada

Publikováno v: Electrochimica Acta. 320:134596

Lithium-ion batteries (LIBs) consisting of LiCoO2 and graphite electrodes exhibit a trade-off relationship between their reversible capacity and cycle/calendar life in terms of the charge cut-off voltage. That is to say, a higher charge cut-off volta

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fdbea03ca1cc8e40031585ed91801c51
https://doi.org/10.1016/j.electacta.2019.134596

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