Diphenyl guanidine vulcanization accelerators enable sulfurized polyacrylonitrile cathode for high capacity and ether-compatible by fast kinetic

Sulfurized polyacrylonitrile (SPAN) cathode shows excellent electrochemical performance in carbonate electrolyte for lithium-sulfur batteries. However, the limited redox conversion rate of SPAN cathode in ether electrolyte would lead to high solubility of the intermediate polysulfide Li2Sn(n ≤ 4) an...

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Bibliographic Details
Published in:Energy (Oxford) 2021-10, Vol.233, p.121160, Article 121160
Main Authors: Wang, Yu, Zhang, Yunpeng, Shuai, Yi, Chen, Kanghua
Format: Article
Language:English
Subjects:
Accelerators
Cathodes
Conductivity
Conversion
Electrochemical analysis
Electrochemistry
Electrolytes
Ether-based electrolytes
Guanidine
Lithium
Lithium sulfur batteries
Polyacrylonitrile
Polysulfides
Reaction kinetics
Rechargeable batteries
Specific capacity
Sulfur
Sulfurized polyacrylonitrile
Vulcanization
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Summary:Sulfurized polyacrylonitrile (SPAN) cathode shows excellent electrochemical performance in carbonate electrolyte for lithium-sulfur batteries. However, the limited redox conversion rate of SPAN cathode in ether electrolyte would lead to high solubility of the intermediate polysulfide Li2Sn(n ≤ 4) and shuttling, resulting in a low performance of corresponding lithium-sulfur battery, even though ether-based electrolytes are more suitable in terms of Li metal anode. In addition, SPAN is comparatively lower sulfur loading (
ISSN:0360-5442
1873-6785
DOI:10.1016/j.energy.2021.121160