Affiliation:
1. School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 P. R. China
2. College of Materials and Chemistry & Chemical Engineering Chengdu University of Technology Chengdu 610059 P. R. China
3. Institute for Carbon Neutralization College of Chemistry and Materials Engineering Wenzhou University Wenzhou Zhejiang 325035 P. R. China
4. Centre for Clean Energy Technology School of Mathematical and Physical Sciences Faculty of Science University of Technology Sydney 15 Broadway Ultimo NSW 2007 Australia
Abstract
AbstractLithium‐sulfur battery (LSB) is widely regarded as the most promising next‐generation energy storage system owing to its high theoretical capacity and low cost. However, the practical application of LSBs is mainly hampered by the low electronic conductivity of the sulfur cathode and the notorious “shuttle effect”, which lead to high voltage polarization, severe over‐charge behavior, and rapid capacity decay. To address these issues, a novel sulfur reservoir is synthesized by coating polypyrrole (PPy) thin film on hollow layered double hydroxide (LDH) (PPy@LDH). After compositing with sulfur, such PPy@LDH‐S cathode shows a multi‐functional effect to reserve lithium polysulfides (LiPSs). In addition, the unique architecture provides sufficient inner space to encapsulate the volume expansion and enhances the reaction kinetics of sulfur‐based redox chemistry. Theoretical calculations have illustrated that the PPy@LDH has shown stronger chemical adsorption capability for LiPSs than those of porous carbon and LDH, preventing the shuttling of LiPSs and enhancing the nucleation affinity of liquid‐solid conversion. As a result, the PPy@LDH‐S electrode delivers a stable cycling performance and a superior rate capability. Flexible battery has demonstrated this PPy@LDH‐S electrode can work properly with treatments of bending, folding, and even twisting, paving the way for wearable devices and flexible electronics.
Funder
National Natural Science Foundation of China
Shanghai Municipal Education Commission
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
6 articles.
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