LiFeO2-Incorporated Li2MoO3 as a Cathode Additive for Lithium-Ion Battery Safety

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• 作者：Kyu-Sung Park ; Dongmin Im ; Anass Benayad ; Anthony Dylla ; Keith J. Stevenson ; John B. Goodenough
• 刊名：Chemistry of Materials
• 出版年：2012
• 出版时间：July 24, 2012
• 年：2012
• 卷：24
• 期：14
• 页码：2673-2683
• 全文大小：639K
• 年卷期：v.24,no.14(July 24, 2012)
• ISSN：1520-5002

文摘

Li₂MoO₃, with a Mo(IV)/Mo(VI) redox couple, has been tested as a cathode additive to make lithium-ion batteries safe under abnormal discharge conditions. Its high charging capacity and sloping discharge voltage below 3.4 V vs Li⁺/Li effectively prevents the Cu anode current collector from oxidative dissolution at the overdischarge condition. However, molybdenum dissolution from the electrochemically charged Li₂MoO₃ quickly deteriorates the battery performance at 45 掳C. A solid solution of Li₂MoO₃ with LiFeO₂ has stabilized the crystalline structure at the charged states and suppressed the Mo(VI) dissolution. The addition of 10 wt % 0.9Li₂MoO₃鈥?.1LiFeO₂ to LiCoO₂ electrode enables long-term, high-temperature cycling in the operating voltage range of 0.0鈥?.3 V vs graphite.

Keywords:

m%5C-ion+battery&qsSearchArea=searchText">lithium-ion battery; overdischarge; Li₂MoO₃; Mo dissolution; LiFeO₂