Strongly binding natural stibnite on carbon fiber as anode for lithium-ion batteries

Abstract

The antimony sulfide (Sb2S3) as a new alternative anode for lithium-ion batteries has been widely studied because of its high theoretical specific capacity (946 mAh/g), good safety, and abundant resources. In this paper, a one-dimensional anode material with Sb2S3 nano-layers (Sb2S3-NLs) composite was prepared by a simple, efficient, and non-polluting mixed-melting method that uses carbon fiber material as a matrix and high-enrichment natural stibnite as a raw material. By controlling the holding time, the Sb2S3 ore that coated on the surface of carbon fiber (CF) is reorganized from unevenly distributed microparticles into nanosheets and nanoparticles. The CF@Sb2S3-NLs anode has a nanocomposite structure that can relieve the volume change of Sb2S3 and increase the contact area between the electrode materials, as well as shorten the ion/electron migration path and obtain excellent rate performance in the cycle process.