A new approach to improve the high-voltage cyclic performance of Li-rich layered cathode material by electrochemical pre-treatment
A new approach to improve the high-voltage cyclic performance of Li-rich layered cathode material by electrochemical pre-treatment
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DOI：
10.1016/j.jpowsour.2008.04.086
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发表时间：
2008-08-15
影响因子：
9.2
通讯作者：
Sato, Yuichi
中科院分区：
文献类型：
--
作者：
Ito, Atsushi;Li, Decheng;Sato, Yuichi
采用共沉淀法制备了富锂镍锰钴氧化物Li[Ni0.17Li0.2Co0.07Mn0.56]O-2，并研究了其高电位循环行为。当在 4.5 V 以上工作时，所制备的材料在最初的几个循环中表现出快速的容量衰减，这可以通过预循环处理得到显着改善。通过分步预循环处理，经过50次循环后，其在4.8-2 V范围内的可逆容量可从200 mAh g(-1)增加到250 mAh g(-1)。 (C) 2008 Elsevier B.V. 保留所有权利。
Lithium-rich nickel-manganese-cobalt oxide, Li[Ni0.17Li0.2Co0.07Mn0.56]O-2, was prepared by a co-precipitation method, and its cyclic behavior at a high potential was investigated. The as-prepared material shows a rapid capacity fading in its initial several cycles when it was operated above 4.5 V, which could be significantly improved through a pre-cycling treatment. Its reversible capacity in the range of 4.8-2 V could be increased from 200 to 250 mAh g(-1) after 50 cycle through a stepped pre-cycling treatment. (C) 2008 Elsevier B.V. All rights reserved.