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タイトル: | Stabilization of the Electronic Structure at the Cathode/Electrolyte Interface via MgO Ultra-thin Layer during Lithium-ions Insertion/Extraction |
著者: | YAMAMOTO, Kentaro https://orcid.org/0000-0002-8739-4246 (unconfirmed) ORIKASA, Yuki TAKAMATSU, Daiko KOYAMA, Yukinori MORI, Shinichiro MASESE, Titus MORI, Takuya MINATO, Taketoshi TANIDA, Hajime URUGA, Tomoya OGUMI, Zempachi UCHIMOTO, Yoshiharu https://orcid.org/0000-0002-1491-2647 (unconfirmed) |
著者名の別形: | 折笠, 有基 |
キーワード: | Lithium Ion Battery Surface Coating Interfacial Structure Operando Measurement |
発行日: | Oct-2014 |
出版者: | Electrochemical Society of Japan |
誌名: | Electrochemistry |
巻: | 82 |
号: | 10 |
開始ページ: | 891 |
終了ページ: | 896 |
抄録: | Degradation mechanism of surface coating effects at the cathode/electrolyte interface is investigated using thin-film model electrodes combined with operando X-ray absorption spectroscopy (XAS). MgO-coated LiCoO[2] thin-film electrodes prepared via pulsed laser deposition at room temperature and high temperature are used as model systems. The MgO coating improves the durability of the cathode during high-potential cycling. Operando total reflection fluorescence XAS reveals that initial deterioration due to reduction of Co ions at the surface of the uncoated-LiCoO[2] thin film upon electrolyte immersion is inhibited by the MgO coating. Operando depth-resolved XAS reveals that the MgO coating suppresses drastic distortions of local structure at the LiCoO[2] surface as observed in the uncoated-LiCoO[2] during charging process. The electronic and local structure changes at the electrode/electrolyte interface for two types of surface coating morphologies are discussed. |
著作権等: | © 2014 The Electrochemical Society of Japan This is not the published version. Please cite only the published version. 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。 |
URI: | http://hdl.handle.net/2433/191119 |
DOI(出版社版): | 10.5796/electrochemistry.82.891 |
出現コレクション: | 学術雑誌掲載論文等 |
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