Improved Electrochemical Performance Based on Nanostructured SnS2@CoS2-rGO Composite Anode for Sodium-Ion Batteries

Xia Wang; Xueying Li; Qiang Li; Hongsen Li; Jie Xu; Hong Wang; Guoxia Zhao; Lisha Lu; Xiaoyu Lin; Hongliang Li; Shandong Li

doi:10.1007/s40820-018-0200-x

Improved Electrochemical Performance Based on Nanostructured SnS₂@CoS₂-rGO Composite Anode for Sodium-Ion Batteries

Nanomicro Lett. 2018;10(3):46. doi: 10.1007/s40820-018-0200-x. Epub 2018 Apr 13.

Authors

Xia Wang¹, Xueying Li², Qiang Li², Hongsen Li², Jie Xu², Hong Wang², Guoxia Zhao², Lisha Lu², Xiaoyu Lin², Hongliang Li³, Shandong Li⁴

Affiliations

¹ College of Physics, Key Laboratory of Photonics Materials and Technology in Universities of Shandong, and Laboratory of Fiber Materials and Modern Textile, the Growing Base for State Key Laboratory, Qingdao University, Qingdao, 266071, People's Republic of China. wangxiakuaile@qdu.edu.cn.
² College of Physics, Key Laboratory of Photonics Materials and Technology in Universities of Shandong, and Laboratory of Fiber Materials and Modern Textile, the Growing Base for State Key Laboratory, Qingdao University, Qingdao, 266071, People's Republic of China.
³ Institute of Materials for Energy and Environment, Qingdao University, Qingdao, 266071, People's Republic of China.
⁴ College of Physics, Key Laboratory of Photonics Materials and Technology in Universities of Shandong, and Laboratory of Fiber Materials and Modern Textile, the Growing Base for State Key Laboratory, Qingdao University, Qingdao, 266071, People's Republic of China. lishd@qdu.edu.cn.

Abstract

A promising anode material composed of SnS₂@CoS₂ flower-like spheres assembled from SnS₂ nanosheets and CoS₂ nanoparticles accompanied by reduced graphene oxide (rGO) was fabricated by a facile hydrothermal pathway. The presence of rGO and the combined merits of SnS₂ and CoS₂ endow the SnS₂@CoS₂-rGO composite with high conductivity pathways and channels for electrons and with excellent properties as an anode material for sodium-ion batteries (SIBs). A high capacity of 514.0 mAh g^-1 at a current density of 200 mA g^-1 after 100 cycles and a good rate capability can be delivered. The defined structure and good sodium-storage performance of the SnS₂@CoS₂-rGO composite demonstrate its promising application in high-performance SIBs.

Keywords: CoS2 nanoparticles; Reduced graphene oxide (rGO); SnS2 nanosheets; Sodium-ion batteries (SIBs).