Volume 10, Issue 12 2200917
Research Article

N-Doped Carbon-Coated Mixed-Phase SnS–SnS2 Anode with Carbon Nanofibers Skeleton for Improving Dual-Ion Battery in Concentrated Electrolyte

Yaobing Fang

Yaobing Fang

School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640 China

Guangdong Engineering Technology Research Center of Advanced Insulating Coating, South China University of Technology-Zhuhai Institute of Modern Industrial Innovation, Zhuhai, 519175 China

Search for more papers by this author
Wen Zheng

Wen Zheng

School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640 China

Guangdong Engineering Technology Research Center of Advanced Insulating Coating, South China University of Technology-Zhuhai Institute of Modern Industrial Innovation, Zhuhai, 519175 China

Search for more papers by this author
Tao Hu

Tao Hu

School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640 China

Guangdong Engineering Technology Research Center of Advanced Insulating Coating, South China University of Technology-Zhuhai Institute of Modern Industrial Innovation, Zhuhai, 519175 China

Search for more papers by this author
Li Li

Li Li

School of Environment and Energy, South China University of Technology, Guangzhou, 510006 China

Search for more papers by this author
Wenhui Yuan

Corresponding Author

Wenhui Yuan

School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640 China

Guangdong Engineering Technology Research Center of Advanced Insulating Coating, South China University of Technology-Zhuhai Institute of Modern Industrial Innovation, Zhuhai, 519175 China

Search for more papers by this author
First published: 06 October 2022
Citations: 2

Abstract

Metal sulfides exhibit great potential for anode material due to the lamellar structure. However, the intrinsic low conductivity and large volume expansion result in poor cycle stability. Herein, a porous hierarchical structure (SnS–SnS2)–NC–CF anode material composed of carbon nanofibers skeleton and N-doped carbon is designed, and a full dual-ion battery based on the anode is constructed, coupled with natural graphite and high-concentration electrolyte (6 M LiTFSI + 5% vinylene carbonate). The graphite/(SnS-SnS2)–NC–CF dual-ion battery shows a high initial discharge specific capacity up to 154.3 mAh g−1 at a current density of 100 mA g−1 in a working voltage window of 1.0–4.0 V. Also, the battery obtains a considerable capacity of 67.1 mAh g−1 at the high current density of 1000 mA g−1 and achieves an excellent cycling performance up to 2000 cycles with remarkable Coulombic efficiency near 100%. In addition, the battery exhibits a low self-discharge of 1.83% h−1 and superior fast charge performance. Furthermore, the results of the X-ray diffraction and scanning electron microscope characterizations further demonstrate good reversibility and stability. Consequently, this work provides a feasible strategy for the design of a high performance dual-ion battery energy storage device.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.