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

Abstract

Lithium sulfur (LiS) batteries are promising alternatives to conventional Li-ion batteries in terms of specific capacity and energy. But, 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. We develop a tubular titanium oxide (TiO 2)/reduced graphene oxide (rGO) composite structure (TG) as a sulfur hosting material for constructing better performed LiS batteries. The TG/sulfur cathode (TG/S) is able to deliver ~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 ~95% at various C rates, which are ~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 TiO 2, that is, the spatial tubular structure of TiO 2 provides intimate contact and physical confinement for sulfur, while the polar TiO 2 in TG/S shows strong chemical interaction towards the sulfur species.

Authors:
 [1];  [2];  [3];  [3];  [3];  [2];  [3];  [3]
  1. Washington State Univ., Pullman, WA (United States). School of Mechanical and Materials Engineering; Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States
  3. Washington State Univ., Pullman, WA (United States). School of Mechanical and Materials Engineering
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1413462
Report Number(s):
PNNL-SA-130449
Journal ID: ISSN 0008-6223; PII: S0008622317311569
Grant/Contract Number:  
AC05-76RLO1830
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Carbon
Additional Journal Information:
Journal Volume: 128; Journal Issue: C; Journal ID: ISSN 0008-6223
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 36 MATERIALS SCIENCE

Citation Formats

Song, Junhua, Zheng, Jianming, Feng, Shuo, Zhu, Chengzhou, Fu, Shaofang, Zhao, Wengao, Du, Dan, and Lin, Yuehe. Tubular titanium oxide/reduced graphene oxide-sulfur composite for improved performance of lithium sulfur batteries. United States: N. p., 2017. Web. doi:10.1016/J.CARBON.2017.11.042.
Song, Junhua, Zheng, Jianming, Feng, Shuo, Zhu, Chengzhou, Fu, Shaofang, Zhao, Wengao, Du, Dan, & Lin, Yuehe. Tubular titanium oxide/reduced graphene oxide-sulfur composite for improved performance of lithium sulfur batteries. United States. doi:10.1016/J.CARBON.2017.11.042.
Song, Junhua, Zheng, Jianming, Feng, Shuo, Zhu, Chengzhou, Fu, Shaofang, Zhao, Wengao, Du, Dan, and Lin, Yuehe. Mon . "Tubular titanium oxide/reduced graphene oxide-sulfur composite for improved performance of lithium sulfur batteries". United States. doi:10.1016/J.CARBON.2017.11.042.
@article{osti_1413462,
title = {Tubular titanium oxide/reduced graphene oxide-sulfur composite for improved performance of lithium sulfur batteries},
author = {Song, Junhua and Zheng, Jianming and Feng, Shuo and Zhu, Chengzhou and Fu, Shaofang and Zhao, Wengao and Du, Dan and Lin, Yuehe},
abstractNote = {Lithium sulfur (LiS) batteries are promising alternatives to conventional Li-ion batteries in terms of specific capacity and energy. But, 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. We develop a tubular titanium oxide (TiO2)/reduced graphene oxide (rGO) composite structure (TG) as a sulfur hosting material for constructing better performed LiS batteries. The TG/sulfur cathode (TG/S) is able to deliver ~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 ~95% at various C rates, which are ~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.},
doi = {10.1016/J.CARBON.2017.11.042},
journal = {Carbon},
number = C,
volume = 128,
place = {United States},
year = {Mon Nov 20 00:00:00 EST 2017},
month = {Mon Nov 20 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on November 20, 2018
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Cited by: 1 work
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