A Carbon-Sulfur Hybrid with Pomegranate-like Structure for Lithium-Sulfur Batteries

Yanting Shi; Wei Lv; Shuzhang Niu; Yanbing He; Guangmin Zhou; Guohua Chen; Baohua Li; Quan-Hong Yang; Feiyu Kang

doi:10.1002/asia.201600070

A Carbon-Sulfur Hybrid with Pomegranate-like Structure for Lithium-Sulfur Batteries

Chem Asian J. 2016 May 6;11(9):1343-7. doi: 10.1002/asia.201600070. Epub 2016 Mar 21.

Authors

Yanting Shi^{1

2

3}, Wei Lv⁴, Shuzhang Niu^{1

2}, Yanbing He¹, Guangmin Zhou⁵, Guohua Chen⁶, Baohua Li⁷, Quan-Hong Yang¹, Feiyu Kang^{1

2}

Affiliations

¹ Engineering Laboratory for Functionalized Carbon Materials and, Shenzhen Key Laboratory for Graphene-based Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China.
² School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.
³ Department of Chemical and Biomolecular Engineering, Hong Kong University of Science and Technology, Hong Kong, 999077, China.
⁴ Engineering Laboratory for Functionalized Carbon Materials and, Shenzhen Key Laboratory for Graphene-based Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China. lv.wei@sz.tsinghua.edu.cn.
⁵ Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Science, Shenyang, 110016, China.
⁶ Department of Chemical and Biomolecular Engineering, Hong Kong University of Science and Technology, Hong Kong, 999077, China. kechengh@ust.hk.
⁷ Engineering Laboratory for Functionalized Carbon Materials and, Shenzhen Key Laboratory for Graphene-based Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China. libh@mail.sz.tsinghua.edu.cn.

PMID: 26918663
DOI: 10.1002/asia.201600070

Abstract

A carbon-sulfur hybrid with pomegranate-like core-shell structure, which demonstrates a high rate performance and relatively high cyclic stability, is obtained through carbonization of a carbon precursor in the presence of a sulfur precursor (FeS2 ) and a following oxidation of FeS2 to sulfur by HNO3 . Such a structure effectively protects the sulfur and leaves enough buffer space after Fe(3+) removal and, at the same time, has an interconnected conductive network. The capacity of the obtained hybrid is 450 mA h g(-1) under the current density of 5 C. This work provides a simple strategy to design and prepare various high-performance carbon-sulfur hybrids for lithium-sulfur batteries.

Keywords: FeS2; carbon-sulfur hybrid; core-shell structure; lithium-sulfur batteries; pomegranate-like structure.

Publication types

Research Support, Non-U.S. Gov't