Controlling the Precursor Morphology of Ni-Rich Li(Ni0.8Co0.1Mn0.1)O2 Cathode for Lithium-Ion Battery

Abstract

Ni-rich Li(Ni[Formula: see text]Co[Formula: see text]Mn[Formula: see text]O2 cathode material is widely recognized as one of the most cathode materials for lithium-ion batteries due to its high specific capacity, high energy density and low cost. In this paper, the NCM cathode material precursor Ni[Formula: see text]Co[Formula: see text]Mn[Formula: see text](OH)2 was prepared by coprecipitation method and the optimum experimental conditions were investigated. The effects of water bath temperature on the electrochemical performances of the prepared materials were investigated by controlling the morphology. The results showed that 60∘C was the best bath temperature for the precursor which has a regular spheroidal morphology and uniform particles with the diameter of 10[Formula: see text][Formula: see text]m. After coprecipitation, the samples calcined under oxygen atmosphere displayed good electrochemical properties. The discharge specific capacity is up to 194[Formula: see text]mA[Formula: see text][Formula: see text][Formula: see text]h[Formula: see text][Formula: see text][Formula: see text]g[Formula: see text] and 134[Formula: see text]mA[Formula: see text][Formula: see text][Formula: see text]h[Formula: see text][Formula: see text][Formula: see text]g[Formula: see text] at 0.2∘C and 5∘C, respectively. The initial coulombic efficiency is 87.57% at 0.2∘C.