1. School of Metallurgy and Environment and Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Central South University, Changsha 410083, P. R. China
2. Key Laboratory of Value-added Metallurgy of Hunan Province, Central South University, Changsha, 410083 Hunan, P. R. China
3. National Engineering Research Centre of Advanced Energy Storage Materials, Changsha 410205, P. R. China
4. BASF ShanShan Battery Material Co., LTD, Changsha 410205, P. R. China