Preparation of Cu7.2S4@N, S co-doped carbon honeycomb-like composite structure for high-rate and high-stability sodium-ion storage

Chao Peng; Lijuan Yue; Yu Cui; Xiangfei He; Shoudong Xu; Chunli Guo; Meiqing Guo; Han Chen

doi:10.1016/j.jcis.2023.05.096

Preparation of Cu_7.2S₄@N, S co-doped carbon honeycomb-like composite structure for high-rate and high-stability sodium-ion storage

J Colloid Interface Sci. 2023 Oct 15:648:527-534. doi: 10.1016/j.jcis.2023.05.096. Epub 2023 May 26.

Authors

Chao Peng¹, Lijuan Yue², Yu Cui³, Xiangfei He¹, Shoudong Xu⁴, Chunli Guo⁵, Meiqing Guo⁶, Han Chen⁷

Affiliations

¹ College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
² College of Materials Science and Engineering, Hunan University, Changsha 410082, China.
³ Institute of Energy Innovation, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
⁴ College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, China.
⁵ College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China. Electronic address: guochunli@tyut.edu.cn.
⁶ College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China. Electronic address: guomeiqing@tyut.edu.cn.
⁷ College of Materials and Environmental Engineering, Changsha University, Changsha 410022, China.

PMID: 37307609
DOI: 10.1016/j.jcis.2023.05.096

Abstract

Sodium ion batteries (SIBs) attract most of the attention as alterative secondary battery systems for future large-scale energy storage and power batteries due to abundance resource and low cost. However, the lack of anode materials with high-rate performance and high cycling-stability has limited the commercial application of SIBs. In this paper, Cu_7.2S₄@N, S co-doped carbon (Cu_7.2S₄@NSC) honeycomb-like composite structure was designed and prepared by a one-step high-temperature chemical blowing process. As an anode material for SIBs, Cu_7.2S₄@NSC electrode exhibited an ultra-high initial Coulomb efficiency (94.9%) and an excellent electrochemical property including a high reversible capacity of 441.3 mAh g^-1 after 100 cycles at 0.2 A g^-1, an excellent rate performance of 380.4 mAh g^-1 even at 5 A g^-1, and a superior long-cycle stability with a capacity retention rate of approximately 100% after 700 cycles at 1A g^-1.

Keywords: Anode material; Sodium ion battery; Transition metal sulfide.