A modified co-precipitation process to coat LiNi1/3Co1/3Mn1/3O2 onto LiNi0.8Co0.1Mn0.1O2 for improving the electrochemical performance

作者：Lu, Xibin; Li, Xinhai^*; Wang, Zhixing; Guo, Huajun; Yan, Guochun; Yin, Xing

来源：Applied Surface Science, 2014, 297: 182-187.

DOI：10.1016/j.apsusc.2014.01.121

• Li-ion battery
• Coating
• LiNi0.8Co0.1Mn0.1O2
• LiNi1/3Co1/3Mn1/3O2

A modified LiNi1/3Co1/3Mn1/3O2-coating process is introduced to improve the electrochemical performance of LiNi0.8Co0.1Mn0.1O2 (LNCM811). The coating process is carried on a precursor, Ni0.8Co0.1Mn0.1(OH) 2 (NCM811), rather than on LNCM811. Unlike the electro-inert metal oxide coatings, the LiNi1/3Co1/3Mn1/3O2 (LNCM111) layer is electrochemically active and able to relieve reactions between the highly delithiated Li1-mu Ni0.8Co0.1Mn0.1O2 and the electrolyte on account of the decrease of nickel content in outer layer. The LNCM111-coated LNCM811 material shows superior electrochemical performance, with an initial discharge capacity of 153 mAh g(-1) and capacity retention of 90% after 100 cycles at 2C rate between 2.8 and 4.3 V at 60 degrees C.

• 出版日期2014-4-1
• 单位中南大学