Three-Dimensional Porous Graphene Aerogel Cathode with High Sulfur Loading and Embedded TiO2 Nanoparticles for Advanced Lithium-Sulfur Batteries

Jian Qiu Huang, Zhenyu Wang, Zheng Long Xu, Woon Gie Chong, Xianying Qin, Xiangyu Wang, Jang Kyo Kim (Corresponding Author)

Research output: Journal article publicationJournal articleAcademic researchpeer-review

89 Citations (Scopus)

Abstract

Three-dimensional graphene aerogel/TiO2/sulfur (GA/TiO2/S) composites are synthesized through a facile, one-pot hydrothermal route as the cathode for lithium-sulfur batteries. With a high sulfur content of 75.1 wt %, the conductive, highly porous composite electrode delivers a high discharge capacity of 512 mA h/g after 250 cycles at a current rate of 1 C with a low capacity decay of 0.128% per cycle. The excellent capacities and cyclic stability arise from several unique functional features of the cathode. (i) The conductive graphene aerogel framework ameliorates ion/electron transfer while accommodating the volume expansion induced during discharge, and (ii) TiO2 nanoparticles play an important role in restricting the dissolution of polysulfides by chemical bonds with sulfur.

Original languageEnglish
Pages (from-to)28663-28670
Number of pages8
JournalACS Applied Materials and Interfaces
Volume8
Issue number42
DOIs
Publication statusPublished - 26 Oct 2016
Externally publishedYes

Keywords

  • chemical interactions
  • graphene aerogel
  • hydrothermal synthesis
  • lithium-sulfur batteries
  • polysulfide adsorption
  • titanium dioxide

ASJC Scopus subject areas

  • Materials Science(all)

Cite this