Multifunctional Sandwich-Structured Electrolyte for High-Performance Lithium–Sulfur Batteries

Hongtao Qu; Jianjun Zhang; Aobing Du; Bingbing Chen; Jingchao Chai; Nan Xue; Longlong Wang; Lixin Qiao; Chen Wang; Xiao Zang; Jinfeng Yang; Xiaogang Wang; Guanglei Cui

doi:10.1002/advs.201700503

Multifunctional Sandwich-Structured Electrolyte for High-Performance Lithium–Sulfur Batteries

Hongtao Qu, Jianjun Zhang, Aobing Du, Bingbing Chen, Jingchao Chai, Nan Xue, Longlong Wang, Lixin Qiao, Chen Wang, Xiao Zang, Jinfeng Yang, Xiaogang Wang, Guanglei Cui

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95 Scopus citations

Abstract

Due to its high theoretical energy density (2600 Wh kg⁻¹), low cost, and environmental benignity, the lithium–sulfur (Li-S) battery is attracting strong interest among the various electrochemical energy storage systems. However, its practical application is seriously hampered by the so-called shuttle effect of the highly soluble polysulfides. Herein, a novel design of multifunctional sandwich-structured polymer electrolyte (polymer/cellulose nonwoven/nanocarbon) for high-performance Li-S batteries is demonstrated. It is verified that Li-S battery with this sandwich-structured polymer electrolyte delivers excellent cycling stability (only 0.039% capacity decay cycle⁻¹ on average exceeding 1500 cycles at 0.5 C) and rate capability (with a reversible capacity of 594 mA h g⁻¹ at 4 C). These electrochemical performances are attributed to the synergistic effect of each layer in this unique sandwich-structured polymer electrolyte including steady lithium stripping/plating, strong polysulfide absorption ability, and increased redox reaction sites. More importantly, even with high sulfur loading of 4.9 mg cm⁻², Li-S battery with this sandwich-structured polymer electrolyte can deliver high initial areal capacity of 5.1 mA h cm⁻². This demonstrated strategy here may open up a new era of designing hierarchical structured polymer electrolytes for high-performance Li-S batteries.

Original language	English
Article number	1700503
Journal	Advanced Science
Volume	5
Issue number	3
DOIs	https://doi.org/10.1002/advs.201700503
State	Published - Mar 2018
Externally published	Yes

Bibliographical note

Funding Information:
H.T.Q. and J.J.Z. contributed equally to this work. This original research was financially supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA09010105), Think-Tank Mutual Fund of Qingdao Energy Storage Industry Scientific Research, “135” Projects Fund of CAS-QIBEBT Director Innovation Foundation, Qingdao Science and Technology Program (17-1-1-26-jch), and China Postdoctoral Science Foundation (No. 2017M612366).

Publisher Copyright:
© 2018 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

cellulose nonwoven materials
lithium–sulfur batteries
multifunctional materials
nanocarbon black
sandwich-structured electrolytes

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abstract = "Due to its high theoretical energy density (2600 Wh kg−1), low cost, and environmental benignity, the lithium–sulfur (Li-S) battery is attracting strong interest among the various electrochemical energy storage systems. However, its practical application is seriously hampered by the so-called shuttle effect of the highly soluble polysulfides. Herein, a novel design of multifunctional sandwich-structured polymer electrolyte (polymer/cellulose nonwoven/nanocarbon) for high-performance Li-S batteries is demonstrated. It is verified that Li-S battery with this sandwich-structured polymer electrolyte delivers excellent cycling stability (only 0.039% capacity decay cycle−1 on average exceeding 1500 cycles at 0.5 C) and rate capability (with a reversible capacity of 594 mA h g−1 at 4 C). These electrochemical performances are attributed to the synergistic effect of each layer in this unique sandwich-structured polymer electrolyte including steady lithium stripping/plating, strong polysulfide absorption ability, and increased redox reaction sites. More importantly, even with high sulfur loading of 4.9 mg cm−2, Li-S battery with this sandwich-structured polymer electrolyte can deliver high initial areal capacity of 5.1 mA h cm−2. This demonstrated strategy here may open up a new era of designing hierarchical structured polymer electrolytes for high-performance Li-S batteries.",

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author = "Hongtao Qu and Jianjun Zhang and Aobing Du and Bingbing Chen and Jingchao Chai and Nan Xue and Longlong Wang and Lixin Qiao and Chen Wang and Xiao Zang and Jinfeng Yang and Xiaogang Wang and Guanglei Cui",

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AU - Chai, Jingchao

AU - Xue, Nan

AU - Wang, Longlong

AU - Qiao, Lixin

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Multifunctional Sandwich-Structured Electrolyte for High-Performance Lithium–Sulfur Batteries

Abstract

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Keywords

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