Room-Temperature Mechanosynthesis of Ni[sub 3]S[sub 2] as Cathode Material for Rechargeable Lithium Polymer Batteries

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.