Sb2S3 added bio-carbon: Demonstration of potential anode in lithium and sodium-ion batteries

Abstract

Activated carbons derived from bio-wastes are quite intriguing, as they possess most of the desirable anodic properties such as larger specific surface area, hierarchical porosity and better electrical conductivity required for exploitation in both LIBs and SIBs. Previously, we have investigated coir pith derived carbon (CPC) which is bestowed with larger specific surface area and uniform distribution of pores for its suitability as energy efficient electrode in electrochemical energy storage systems such as LIBs, SIBs and supercapacitors. As a sequel to our earlier report on the moderate performance of CPC anode this study discusses on the advantages of the composite containing Sb2S3 and CPC in improving the electrochemical performance. Herein, we improved the anodic behavior of CPC, through the incorporation of in-situ formed Sb2S3 obtained from hydrothermal method into the structure of CPC. The CPC/Sb2S3 composite contains ∼11% of Sb2S3 and delivers a capacity of 1100 mA h g−1 at 100 mA g−1 in LIBs and 220 mA h g−1 at 1000 mA g−1 current condition in SIBs. Such a superior electrochemical performance of the composite anode substantiates the synergistic effect of CPC and Sb2S3 in endorsing the suitability of CPC/Sb2S3 anode for use in LIBs and SIBs.