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

doi:10.1021/acsami.6b10032

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

Mechanical & Nuclear Engineering

The Hong Kong University of Science and Technology

Research output: Contribution to journal › Article › peer-review

107 Scopus citations

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 language	British English
Pages (from-to)	28663-28670
Number of pages	8
Journal	ACS Applied Materials and Interfaces
Volume	8
Issue number	42
DOIs	https://doi.org/10.1021/acsami.6b10032
State	Published - 26 Oct 2016

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

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

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10.1021/acsami.6b10032

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Cite this

@article{d64ab66647e442619d2ade982de54a32,

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

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.",

keywords = "chemical interactions, graphene aerogel, hydrothermal synthesis, lithium-sulfur batteries, polysulfide adsorption, titanium dioxide",

author = "Huang, \{Jian Qiu\} and Zhenyu Wang and Xu, \{Zheng Long\} and Chong, \{Woon Gie\} and Xianying Qin and Xiangyu Wang and Kim, \{Jang Kyo\}",

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doi = "10.1021/acsami.6b10032",

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T1 - Three-Dimensional Porous Graphene Aerogel Cathode with High Sulfur Loading and Embedded TiO2 Nanoparticles for Advanced Lithium-Sulfur Batteries

AU - Huang, Jian Qiu

AU - Wang, Zhenyu

AU - Xu, Zheng Long

AU - Chong, Woon Gie

AU - Qin, Xianying

AU - Wang, Xiangyu

AU - Kim, Jang Kyo

PY - 2016/10/26

Y1 - 2016/10/26

N2 - 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.

AB - 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.

KW - chemical interactions

KW - graphene aerogel

KW - hydrothermal synthesis

KW - lithium-sulfur batteries

KW - polysulfide adsorption

KW - titanium dioxide

UR - https://www.scopus.com/pages/publications/84993967753

U2 - 10.1021/acsami.6b10032

DO - 10.1021/acsami.6b10032

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JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

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