Room-Temperature Mechanosynthesis of Ni3S2 as Cathode Material for Rechargeable Lithium Polymer Batteries

Abstract

The formation of was realized by mechanical alloying with metallic nickel and sulfur powder as precursors. The products were characterized by X-ray diffraction, thermoanalysis, and scanning electron microscopy. Electrochemical properties of cells were also presented. The initial discharge capacity of was , with a platform at about vs . A capacity fading rate of 0.5% per cycle was achieved within . The charge–discharge mechanism of was implied by the analysis of the charge–discharge potential profiles, the cyclic voltammetry traces, and the ex situ XRD patterns of the cathode.