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题名

Aqueous-processable polymer binder with strong mechanical and polysulfide-trapping properties for high performance of lithium-sulfur batteries

作者
通讯作者Zeng, Hongbo; Wang, Chaoyang; Deng, Yonghong
发表日期
2018-10-14
DOI
发表期刊
ISSN
2050-7488
EISSN
2050-7496
卷号6期号:38页码:18660-18668
摘要

Lithium-sulfur batteries (LSBs) are regarded as the next-generation high-performance energy storage devices due to their high energy density. However, the long-term use of LSBs in practical applications is limited by the shuttle effect resulting from the diffusion of lithium polysulfides (LiPS) in electrolyte. To address these challenges, a novel aqueous-processable polymer with multiple functional groups, catechol-conjugated chitosan sulfate (CCS), is developed as the binder of the sulfur cathode. The CCS binder demonstrates strong adsorption capability to trap LiPS, as evidenced by ultraviolet-visible (UV-vis) spectra and density functional theory (DFT) calculations. Its excellent mechanical and binding properties also result in stabilization of sulfur cathodes in long-term cycling. LSBs assembled with CCS exhibit remarkable improvement in cycling performance with high capacity retention of 80.14% after 400 cycles at 0.5C, and the electrodes maintain their integrity without any clear cracks. At a high rate of 2C, the LSBs can still maintain 77.30% capacity after 300 cycles with high coulombic efficiency of 99.37%. Our results provide new insights into the significance of sulfate and catechol groups in CCS binder for sulfur cathode and pave a new way for the tailoring of the chemical structures of natural polymers to realize LSBs with superior electrochemical performance.

相关链接[来源记录]
收录类别
SCI ; EI
语种
英语
学校署名
通讯
资助项目
Fundamental Research Foundation of Shenzhen[20170410160631170]
WOS研究方向
Chemistry ; Energy & Fuels ; Materials Science
WOS类目
Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS记录号
WOS:000451380800037
出版者
EI入藏号
20184105917387
EI主题词
Binders ; Binding Energy ; Cathodes ; Conjugated Polymers ; Density Functional Theory ; Electrolytes ; Lithium Batteries ; Lithium Compounds ; Natural Polymers ; Phenols ; Polysulfides ; Sulfur Compounds
EI分类号
Primary Batteries:702.1.1 ; Physical Chemistry:801.4 ; Chemical Agents And Basic Industrial Chemicals:803 ; Organic Compounds:804.1 ; Organic Polymers:815.1.1 ; Probability Theory:922.1
来源库
Web of Science
引用统计
被引频次[WOS]:52
成果类型期刊论文
条目标识符http://kc.sustech.edu.cn/handle/2SGJ60CL/27110
专题工学院_材料科学与工程系
前沿与交叉科学研究院
作者单位
1.South China Univ Technol, Res Inst Mat Sci, Guangzhou 510640, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
3.Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9, Canada
4.Univ Alberta, Dept Mech Engn, Edmonton, AB T6G 1H9, Canada
5.South Univ Sci & Technol China, Acad Adv Interdisciplinary Studies, Shenzhen, Peoples R China
第一作者单位材料科学与工程系
通讯作者单位材料科学与工程系
推荐引用方式
GB/T 7714
Yi, Huan,Lan, Tu,Yang, Yu,et al. Aqueous-processable polymer binder with strong mechanical and polysulfide-trapping properties for high performance of lithium-sulfur batteries[J]. Journal of Materials Chemistry A,2018,6(38):18660-18668.
APA
Yi, Huan.,Lan, Tu.,Yang, Yu.,Lei, Zhiwen.,Zeng, Hongbo.,...&Deng, Yonghong.(2018).Aqueous-processable polymer binder with strong mechanical and polysulfide-trapping properties for high performance of lithium-sulfur batteries.Journal of Materials Chemistry A,6(38),18660-18668.
MLA
Yi, Huan,et al."Aqueous-processable polymer binder with strong mechanical and polysulfide-trapping properties for high performance of lithium-sulfur batteries".Journal of Materials Chemistry A 6.38(2018):18660-18668.
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