材料科学
涂层
溶解
电化学
阴极
化学工程
图层(电子)
复合材料
氧化物
相(物质)
电极
冶金
工程类
物理化学
有机化学
化学
作者
Tanxin Wang,Mingliang Yuan,Yue Liu,Hanhui Liu,Shuai Xie,Jingjun Liu,Junqing Yan
标识
DOI:10.1016/j.ceramint.2021.10.116
摘要
The high-Ni layered metal oxide, LiNi0.8Co0.1Mn0.1O2 (LNCM811), has received widespread attention in the energy field because of its high specific capacity, but its large-scale applications are hindered due to severe capacity fading. Herein, a uniform and thin Li2O–B2O3–LiBr-glass (LBBrO-glass) coating was deposited on LNCM811 by a liquid-phase coating and thermal treatment method. The experimental results suggested that the LBBrO-glass coating acted as a protective layer that inhibited transition metal dissolution and side reactions, which helped improve the electrochemical properties of LNCM811. Remarkably, after 200 cycles, the 2 wt% coating ([email protected]) delivered a superior capacity retention of 88.9%, while only 71.8% was obtained for the pristine material (LNCM811). The discharge capacity of [email protected] was 163.5 mAh g−1 at 5C, while it was only 139 mAh g−1 for the pristine material.
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