Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10656883 | Electrochimica Acta | 2018 | 27 Pages |
Abstract
Mo doped Ni-rich LiNi0.8Co0.1Mn0.1O2 cathode materials have been synthesized via coprecipitation followed by high-temperature solid state method. The effect of Mo doping on the structure, morphology, and electrochemical performances of Ni-rich cathode material has been investigated. The results reveal that Mo doping may promote the formation of surface rock salt phase and expand the Li+ diffusion channels for Ni-rich material. Benefit from which, the further transition of layered to rock salt structure during cycling has been alleviated. As a result, the optimal Mo doped material, with 1â¯wt% doping, exhibits enhanced cycling stability with superior electrochemistry performances, that is high reversible capacity of 215.7â¯mAh gâ1 at 0.1C, and 184.1â¯mAh gâ1 at 1C with an excellent 100th capacity retention of 92.4%. Even the cut-off voltage raises to 4.5â¯V, the 100th capacity retention of Mo-doped material still reaches as high as 85.2%. The results indicate that fabricating the Ni-rich materials with a surface rock salt phase is an effective strategy towards better structure stability and electrochemical performances.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Yuefeng Su, Yongqing Yang, Lai Chen, Yun Lu, Liying Bao, Gang Chen, Zhiru Yang, Qiyu Zhang, Jing Wang, Renjie Chen, Shi Chen, Feng Wu,