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タイトル: | Accelerated discovery of cathode materials with prolonged cycle life for lithium-ion battery. |
著者: | Nishijima, Motoaki Ootani, Takuya Kamimura, Yuichi Sueki, Toshitsugu Esaki, Shogo Murai, Shunsuke https://orcid.org/0000-0002-4597-973X (unconfirmed) Fujita, Koji https://orcid.org/0000-0002-1700-0889 (unconfirmed) Tanaka, Katsuhisa https://orcid.org/0000-0002-1409-2802 (unconfirmed) Ohira, Koji Koyama, Yukinori Tanaka, Isao https://orcid.org/0000-0002-4616-118X (unconfirmed) |
著者名の別形: | 西島, 主明 藤田, 晃司 田中, 勝久 田中, 功 |
キーワード: | Chemical sciences Inorganic chemistry Materials science |
発行日: | 1-Aug-2014 |
出版者: | Nature Publishing Group |
誌名: | Nature communications |
巻: | 5 |
論文番号: | 4553 |
抄録: | Large-scale battery systems are essential for efficiently utilizing renewable energy power sources from solar and wind, which can generate electricity only intermittently. The use of lithium-ion batteries to store the generated energy is one solution. A long cycle life is critical for lithium-ion battery when used in these applications; this is different from portable devices which require 1, 000 cycles at most. Here we demonstrate a novel co-substituted lithium iron phosphate cathode with estimated 70%-capacity retention of 25, 000 cycles. This is found by exploring a wide chemical compositional space using density functional theory calculations. Relative volume change of a compound between fully lithiated and delithiated conditions is used as the descriptor for the cycle life. On the basis of the results of the screening, synthesis of selected materials is targeted. Single-phase samples with the required chemical composition are successfully made by an epoxide-mediated sol-gel method. The optimized materials show excellent cycle-life performance as lithium-ion battery cathodes. |
記述: | 革新的材料設計手法により超長寿命2次電池開発に成功 -多数の高精度計算データを活用して材料開発を大幅に加速-. 京都大学プレスリリース. 2014-07-30. |
著作権等: | © 2014 Macmillan Publishers Limited. 許諾条件により本文は2015-02-02に公開. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 This is not the published version. Please cite only the published version. |
URI: | http://hdl.handle.net/2433/189272 |
DOI(出版社版): | 10.1038/ncomms5553 |
PubMed ID: | 25080933 |
関連リンク: | https://www.kyoto-u.ac.jp/ja/research-news/2014-07-30 |
出現コレクション: | 学術雑誌掲載論文等 |
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