Tubular titanium oxide/reduced graphene oxide-sulfur composite for improved performance of lithium sulfur batteries

Junhua Song; Jianming Zheng; Shuo Feng; Chengzhou Zhu; Shaofang Fu; Wengao Zhao; Dan Du; Yuehe Lin

doi:10.1016/j.carbon.2017.11.042

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Tubular titanium oxide/reduced graphene oxide-sulfur composite for improved performance of lithium sulfur batteries

Journal article

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Tubular titanium oxide/reduced graphene oxide-sulfur composite for improved performance of lithium sulfur batteries

Junhua Song, Jianming Zheng, Shuo Feng, Chengzhou Zhu, Shaofang Fu, Wengao Zhao, Dan Du and Yuehe Lin

Carbon (New York), Vol.128, pp.63-69

03/01/2018

DOI: https://doi.org/10.1016/j.carbon.2017.11.042

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Abstract

Chemistry

Chemistry, Physical

Materials Science, Multidisciplinary

Science & Technology

Materials Science

Physical Sciences

Technology

Lithium sulfur (LieS) batteries are promising alternatives to conventional Li-ion batteries in terms of specific capacity and energy. However, the technical challenges raised from the soluble polysulfide (PS) in organic electrolyte deter their implementation in practical applications. Nanoengineered structure and chemical adsorptive materials hold great promise in mitigating the PS migration problem. Here, we develop a tubular titanium oxide (TiO2)/reduced graphene oxide (rGO) composite structure (TG) as a sulfur hosting material for constructing better performed LieS batteries. The TG/sulfur cathode (TG/S) is able to deliver similar to 1200 mAh g(-1) specific capacity with stable operation for over 550 cycles. Moreover, the TG/S composite cathode shows stable Coulombic efficiencies of over similar to 95% at various C rates, which are similar to 10% higher than those of the rGO/sulfur (G/S)counterparts. The superior electrochemical performances of TG/S could be ascribed to the synergistic effects between the conductive rGO support and the physically/ chemically absorptive TiO2, that is, the spatial tubular structure of TiO2 provides intimate contact and physical confinement for sulfur, while the polar TiO2 in TG/S shows strong chemical interaction towards the sulfur species. (c) 2017 Elsevier Ltd. All rights reserved.

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Title: Tubular titanium oxide/reduced graphene oxide-sulfur composite for improved performance of lithium sulfur batteries
Creators: Junhua Song - Washington State University
Jianming Zheng - Pacific Northwest National Laboratory
Shuo Feng - Washington State University
Chengzhou Zhu - Washington State University
Shaofang Fu - Washington State University
Wengao Zhao - Pacific Northwest National Laboratory
Dan Du - Washington State University
Yuehe Lin - Washington State University
Publication Details: Carbon (New York), Vol.128, pp.63-69
Academic Unit: School of Mechanical and Materials Engineering
Publisher: Elsevier
Number of pages: 7
Grant note: DE-AC05-76RLO1830 / DOE; United States Department of Energy (DOE) Start-Up fund from Washington State University
Identifiers: 99901227645501842
Language: English
Resource Type: Journal article