Advanced metal sulfide anode for potassium ion batteries

Potassium-ion batteries (KIBs) are a promising alternative to lithium-ion batteries owning to the abundance of potassium on Earth and the relatively low K/K+ redox couple. To date, KIBs remains its infancy and the investigation of anode materials mainly focused on carbon-based materials, which deliver limited reversible capacity. Hence, it is imperative to explore alternative anode materials with high reversible capacity for KIBs. Recently, a pioneering work from Chen's group reported a nanocomposite of Sb2S3 nanoparticles anchored on porous S, N-codoped graphene (denoted as Sb2S3-SNG) as an advanced anode material for KIBs, which exhibited remarkable enhancements of both capacity and cycling stability, highlighting the rational structure design of Sb2S3-SNG for maximum utilization of Sb2S3 nanoparticles and graphene layers for energy storage applications in high-performance KIBs. (C) 2017 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.