Investigation of Ph on Electrochemical Performances of Ni-Rich NCM Cathode Material Precursor

Abstract

Ni-rich NCM cathode material is widely recognized as one of the most cathode materials for lithium ion power batteries due to its high specific capacity, high energy density and low cost. In this paper, the NCM cathode material precursor Ni0.8Co0.1Mn0.1 (OH)2 was prepared by coprecipitation method and the optimum conditions were explored. Also, the effects of different pH values on the morphology and electrochemical performance of the prepared materials were investigated. The results showed that the best synthesis conditions of the precursor are pH=10. The precursor has a regular morphology and uniform particles. The samples calcined under oxygen atmosphere displays the best electrochemical properties. The initial coulombic efficiency is 85.48% at 0.2 C, the discharge specific capacity is up to 192 mAh•g-1 at 0.2 C.