ジャーナル論文 New insight into designing a thick-sintered cathode for Li-ion batteries: the impact of excess lithium in LiCoO2 on its electrode performance
Shinichi Takeno (author) (この著者で検索)
;
Taiki Suematsu (author) (この著者で検索)
;
Ryusei Kunisaki (author) (この著者で検索)
; ORCID SAMURAI ;
Ken Watanabe (author) (この著者で検索)
ORCID https://orcid.org/0000-0001-7374-7322 (unauthenticated)
ORCID ; ORCID SAMURAI ; ORCID SAMURAI ; ORCID SAMURAI ; ORCID SAMURAI ;
Kohichi Suematsu (author) (この著者で検索)
;
Kengo Shimanoe (author) (この著者で検索)
d4ta07377k.pdf
Download file (635KB)
Download as zip (431KB)
コレクション

引用
Shinichi Takeno, Taiki Suematsu, Ryusei Kunisaki, Gen Hasegawa, Ken Watanabe, Naoaki Kuwata, Kazutaka Mitsuishi, Tsuyoshi Ohnishi, Kazunori Takada, Kohichi Suematsu, Kengo Shimanoe. New insight into designing a thick-sintered cathode for Li-ion batteries: the impact of excess lithium in LiCoO2 on its electrode performance. Journal of Materials Chemistry A. 2024, (), . https://doi.org/10.1039/d4ta07377k

説明:

(abstract)

Increasing the capacity of Li-ion batteries is one of the critical issues that must be addressed. A thick and dense electrode using an active material sintered disk is expected to have a high capacity because the volume of the active material is 100% in the cathode. This study focused on LiCoO2, the most well-known active material for the cathode, to improve the properties of the sintered cathode. We investigated the impact of excess Li on various properties. We found that the degree of c-axis orientation in the sintered disk decreased as excess Li increased. In addition, results of 7Li-MAS-NMR suggest the presence of defects resulting from excess Li when the Li excess reached 5.1% or more. The discharge capacity of the LiCoO2 sintered cathode increased as the amount of excess Li increased, and a maximum discharge capacity of 11.2 mA h cm−2 was obtained when the Li excess amount was 7.3%. This result was attributed to the significant improvement in the Li-ion conductivity of LiCoO2 by both the decrease in the degree of c-axis orientation and the introduction of defects due to excess Li. Notably, introducing defects derived from excess Li enhances the Li-ion conductivity. Thus, tuning the amount of excess Li for the LiCoO2 sintered cathode was crucial in enhancing its electrochemical performance as an electrode.

権利情報:

キーワード: Li-ion battery

刊行年月日: 2024-12-06

出版者: Royal Society of Chemistry (RSC)

掲載誌:

  • Journal of Materials Chemistry A (ISSN: 20507488)

研究助成金:

  • Japan Science and Technology Corporation JPMJGX23S22
  • National Institute for Materials Science
  • Japan Society for the Promotion of Science 22K04739
  • Japan Science and Technology Corporation JPMJAL1301
  • Japan Science and Technology Corporation JPMJFS2132
  • Advanced Low Carbon Technology Research and Development Program

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1039/d4ta07377k

関連資料:

その他の識別子:

連絡先:

更新時刻: 2024-12-24 13:58:53 +0900

MDRでの公開時刻: 2025-02-17 18:32:29 +0900

ファイル名 サイズ
ファイル名 d4ta07377k.pdf (サムネイル)
application/pdf 		サイズ 635KB 詳細