Mo–F Co-Doping LiNi<sub>0.83</sub>Co<sub>0.11</sub>Mn<sub>0.06</sub>O<sub>2</sub> Stabilizes the Structure and Induces Compact Primary Particle To Improve the Electrochemical Performance
Guorong Hu, Yinjia Zhang, Jingyao Zeng, Zijun Fang, Yanbing Cao, Zhongdong Peng, Xin Fu Tan, Ke Du
Abstract
The Li + /Ni 2+ cation disorder, material pulverization, surface phase transition, and transition metal (TM) ion dissolution are important issues that plague nickel-rich layered oxide cathode materials. In this paper, doping LiNi 0.83 Co 0.11 Mn 0.06 O 2 with Mo 6+ cation and F – anion effectively alleviates the above problems. The Mo 6+ reduces the cations mixing, and the strong electronegativity of F strengthens the bonding with transition metal ions to resist HF corrosion. Furthermore, compact primary particles with interfused and radially aligned morphology induced by Mo–F co-doping reduce stress damage during cycling. The enhancement of electrochemical performance by Mo–F co-doping is systematically researched in terms of structure, morphology, secondary spherical pulverization, structural phase transition, and dissolution of transition metal ions.