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PIM-1 as a Multifunctional Framework to Enable High-Performance Solid-State Lithium-Sulfur Batteries

Ji, Y; Yang, K; Liu, M; Chen, S; Liu, X; Yang, B; Wang, Z; ... Pan, F; + view all (2021) PIM-1 as a Multifunctional Framework to Enable High-Performance Solid-State Lithium-Sulfur Batteries. Advanced Functional Materials , 31 (47) , Article 2104830. 10.1002/adfm.202104830. Green open access

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Abstract

Poly(ethylene oxide) (PEO) is a promising solid electrolyte material for solid-state lithium–sulfur (Li–S) batteries, but low intrinsic ionic conductivity, poor mechanical properties, and failure to hinder the polysulfide shuttle effect limits its application. Herein, a polymer of intrinsic microporosity (PIM) is synthesized and applied as an organic framework to comprehensively enhance the performance of PEO by forming a composite electrolyte (PEO-PIM). The unique structure of PIM-1 not only enhances the mechanical strength and hardness over the PEO electrolyte by an order of magnitude, increasing stability toward the metallic lithium anode but also increases its ionic conductivity by lowering the degree of crystallinity. Furthermore, the PIM-1 is shown to effectively trap lithium polysulfide species to mitigate against the detrimental polysulfide shuttle effect, as electrophilic 1,4-dicyanooxanthrene functional groups possess higher binding energy to polysulfides. Benefiting from these properties, the use of PEO-PIM composite electrolyte has achieved greatly improved rate performance, long-cycling stability, and excellent safety features for solid-state Li-S batteries. This methodology offers a new direction for the optimization of solid polymer electrolytes.

Type: Article
Title: PIM-1 as a Multifunctional Framework to Enable High-Performance Solid-State Lithium-Sulfur Batteries
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/adfm.202104830
Publisher version: https://doi.org/10.1002/adfm.202104830
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: ion conductance, intrinsic microporosity, mechanical properties, poly(ethylene oxide) electrolytes, polymers, polysulfide shuttling
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10134172
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