J. Mater. Sci. Technol. ›› 2020, Vol. 55: 167-172.DOI: 10.1016/j.jmst.2019.05.074

• Research Article • Previous Articles     Next Articles

Construction of SnS2/SnO2 heterostructures with enhanced potassium storage performance

Guoquan Suoa, Dan Lia, Lei Fenga, Xiaojiang Houa, Xiaohui Yea, Li Zhanga, Qiyao Yub, Yanling Yanga,*(), Wei (Alex) Wangc,*()   

  1. a School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi’an, 710021, China
    b Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China
    c Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
  • Received:2019-02-13 Accepted:2019-05-07 Published:2020-10-15 Online:2020-10-27
  • Contact: Yanling Yang,Wei (Alex) Wang

Abstract:

Increasing attention has been focused on potassium ion batteries (KIBs) as promising energy-storage system (ESS) owing to the abundance and low-cost of potassium resources. Here, SnS2/SnO2 heterostructures were successfully fixed onto stainless steel mesh (SnS2/SnO2/SSM) through a facile two-step hydrothermal method and used as anodes for KIBs. Due to the advantages of SnS2/SnO2 heterostructures and good conductivity of SSM substrate, the SnS2/SnO2/SSM anodes display enhanced electrochemical performance. The SnS2/SnO2/SSM anodes deliver specific capacity of 394 mA h g-1 at 50 mA g-1 over 100 cycles, better than SnO2/SSM. Even at 500 mA g-1 after 250 cycles, high capacity of 155 mA h g-1 can still be obtained.

Key words: SnS2/SnO2, Heterostructures, Potassium-ion batteries, Anode