▎ 摘　　要

Cobalt sulfide is regarded as a candidate for high-capacity lithium-ion batteries. However, it suffers from large volumetric variation during the charge/discharge cycling. Herein, cobalt sulfide/reduced graphene oxide nanocomposite has been fabricated via an unique synthetic methodology with solid cobalt/reduced graphene oxide as the precursor, which can inhibit the agglomeration of cobalt sulfide effectively. In the composite, cobalt sulfide nanoparticles are uniformly embedded in reduced graphene oxide. When utilized in lithium-ion batteries, the nanocomposite demonstrates a high discharge capacity of 796 mAh g(-1) after 50 cycles. The superior lithium-ion storage performance can be ascribed to the hybrid nanostructure and the synergistic effect originated from the unique synthetic methodology. (C) 2019 Elsevier B.V. All rights reserved.