Three-Dimensional Engineering of Sulfur/MnO2 Composites for High-Rate Lithium-Sulfur Batteries

Zihe Chen; Yuxin Hu; Wei Liu; Fang Yu; Xuefeng Yu; Tao Mei; Li Yu; Xianbao Wang

doi:10.1021/acsami.1c10958

Three-Dimensional Engineering of Sulfur/MnO₂ Composites for High-Rate Lithium-Sulfur Batteries

ACS Appl Mater Interfaces. 2021 Aug 18;13(32):38394-38404. doi: 10.1021/acsami.1c10958. Epub 2021 Aug 9.

Authors

Zihe Chen¹, Yuxin Hu¹, Wei Liu¹, Fang Yu¹, Xuefeng Yu¹, Tao Mei¹, Li Yu¹, Xianbao Wang¹

Affiliation

¹ Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Overseas Expertise Introduction Center for Discipline Innovation (D18025), Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, P. R. China.

PMID: 34370432
DOI: 10.1021/acsami.1c10958

Abstract

Herein, a three-dimensional interconnected sulfur (3DIS) system is used to construct a cathode of the lithium-sulfur battery. Compared with the traditional methods of encapsulating sulfur, the 3DIS system serves as a framework to grow MnO₂, which ensures a high sulfur content of 91.5 wt % (the ratio of sulfur/host was 10.8) and a uniform distribution of sulfur. Due to the synergistic effect of the 3D interconnected architecture and the uniform coating layer of polar MnO₂, 3DIS@MnO₂ (3DISMO) delivers a capacity of 891 mA h g^-1 after 900 cycles at 1 C. Even at a rate of 10 C, a capacity decay rate of 0.061% per cycle is achieved.

Keywords: 3D interconnected sulfur; MnO2; cathode; high sulfur content; lithium−sulfur batteries.