Boosting cell performance of LiNi0.8Co0.1Mn0.1O2 cathode material via structure design

• 作者: Lin-bo Tang Yang Liu Han-xin Wei Cheng Yan Zhen-jiang He Yun-jiao Li Jun-chao Zheng
• 来源期刊: 能源化学
• 年，卷（期）: 2021,（4）
• 页码范围: 114-123
• 页数: 10页
• 语种: 英文

摘要

Ni-rich cathodes exhibit appealing properties,such as high capacity density,low cost,and prominent energy density.However,the inferior ionic conductivity and bulk structural degradation become bottle-necks for Ni-rich cathodes and severely limit their commercial utilization.Traditional coating and doping methods suffer fatal drawbacks in functioning as a unit and cannot radically promote material perfor-mance to meet the needs of Li-ion batteries(LIBs).Herein,we successfully devised an ingenious and facile synthetic method to establish Ni-rich oxides with a La2Zr2O7 coating and Zr doping.The coating layer improves the ion diffusion kinetics and enhances Li-ion transportation while Zr doping effectively sup-presses the phase transition of LiNi0.8Co0.1Mno.1O2 cathode.Owing to the synergetic effect of Zr doping and La2Zr2O7 coating,the modified material shows prominent initial discharge capacity of 184.7 mAh g-1 at 5℃and maintains 177.5 mAh g-1 after 100 cycles at 1℃.Overall,the proposed feasible electrode design method can have a far-reaching impact on further fabrication of advanced cathodes for high-performance LIBs.