尖晶石型镍锰酸锂具有高工作电压、高安全性以及低成本等优点成为近年来锂离子电池正极材料研究的热点之一,但其自身存在Mn溶解导致结构破坏和循环性能衰减较快的缺点。重点阐述了通过晶型结构控制、离子掺杂和表面包覆等改性方法提高镍锰酸锂材料结构稳定性和循环性能的研究进展。最后,展望了镍锰酸锂材料未来研究的重点和发展趋势。
Spinel-type lithium nickel manganese oxide has become one of the hot spots in the research of lithium-ion battery cathode materials in recent years due to its advantages of high working voltage,high safety,and low cost.However,it has the disadvantages of structural failure and fast decay of cycling performance caused by Mn dissolution.This paper focused on the research progress on improving the structural stability and cycling performance of lithium nickel manganese oxide materials by modification methods such as crystal structure control,ion doping and surface coating.Finally,the focus and development trend of lithium nickel manganese oxide materials in the future were prospected.
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基金资助
广东省科技计划项目(2017B010119002);佛山市科技计划项目(1920001001421)