材料科学
阴极
电化学
工程物理
纳米技术
电极
物理化学
工程类
化学
作者
Xiaoyu Zhang,Jia Xu,Xueting Liu,Fangyuan Cheng,Peng Wei,Yue Xu,Shixiong Sun,Lin He,Yue Shen,Qing Li,Chun Fang,Jiantao Han
标识
DOI:10.1016/j.ensm.2022.01.056
摘要
Nickel-rich layered oxides are considered to be one of the most promising candidates of cathode material for the next generation Li-ion batteries (LIBs) due to their high specific capacity. However, the capacity fading and poor rate capability caused by the interface instability and structure degradation hinder their commercial applications. Herein, we propose a one-step strategy to stabilize the nickel-rich cathode material through a synergistic effect of surface engineering and lattice doping. The interfacial structure stability is improved by a uniform nano-coating of Gd 2 O 3 &LiGdO 2 with an ultra-high electronic conductivity, the lattice degradation and grain cracks have been suppressed by gradient Gd-doping. It exhibits a distinguish discharge capacity of 62.68 mAh g − 1 at a super high rate of 50 C within the voltage range of 2.7 - 4.5 V, as well as suppresses the capacity decay at high temperature.
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