1. Department of Materials Science and Engineering, Chengdu University of TechnologyChengdu 610059P.R. China
2. College of Chemical Engineering, Sichuan UniversityChengdu 610064, SichuanP.R. China
3. Analytical and Testing Center, Sichuan UniversityChengdu 610064, SichuanP.R. China
4. Sichuan Keneng Lithium Battery Co., Ltd.Chengdu 610101P.R. China