Surface and Interface Issues in Spinel LiNi0.5Mn1.5O4: Insights into a Potential Cathode Material for High Energy Density Lithium Ion Batteries

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• 作者：Jun Ma ; Pu Hu ; Guanglei Cui ; Liquan Chen
• 刊名：Chemistry of Materials
• 出版年：2016
• 出版时间：June 14, 2016
• 年：2016
• 卷：28
• 期：11
• 页码：3578-3606
• 全文大小：2185K
• 年卷期：0
• ISSN：1520-5002

文摘

Spinel LiNi_0.5Mn_1.5O₄ with high operating voltage (∼4.7 V vs Li/Li⁺), high theoretical capacity of 148 mAh g^–1, fast lithium ion diffusion kinetics, and potentially low cost is the most potential candidate material for high energy density LIBs used in plug-in hybrid electric vehicles and pure electric vehicles. However, the high operating voltage of LiNi_0.5Mn_1.5O₄ challenges the electrochemical stability of other components in the batteries and induces diverse interfacial side reactions, leading to irreversible capacity loss, poor cycling performance, and safety issues, especially at the elevated temperatures. Thus, a basic understanding of the intrinsic surface properties of LiNi_0.5Mn_1.5O₄ and the mechanism of interfacial interactions between each component in the electrochemical system is a critical requirement for developing substantial enhancements of LiNi_0.5Mn_1.5O₄-based batteries. In this review, we summarize the surface/interface reactions and challenges in the whole cell system of LiNi_0.5Mn_1.5O₄-based LIBs. Perspectives and strategies for LiNi_0.5Mn_1.5O₄-based high energy density batteries used in PHEV/EVs are also proposed at last.