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Revealing the role ...
Revealing the role and working mechanism of confined ionic liquids in solid polymer composite electrolytes
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- Hu, Haiman (författare)
- Luleå tekniska universitet,Energivetenskap
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- Li, Jiajia, 1995- (författare)
- Luleå tekniska universitet,Energivetenskap
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- Wu, Yue (författare)
- Luleå tekniska universitet,Energivetenskap
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- Fang, Wenhao (författare)
- Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
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- Zhang, Haitao (författare)
- Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
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- Ji, Xiaoyan (författare)
- Luleå tekniska universitet,Energivetenskap
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(creator_code:org_t)
- Elsevier, 2024
- 2024
- Engelska.
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Ingår i: Journal of Energy Chemistry. - : Elsevier. - 2095-4956 .- 2096-885X. ; 99, s. 110-119
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The confined ionic liquid (IL) in solid polymer composite electrolytes (SCPEs) can improve the performance of lithium metal batteries. However, the impact/role and working mechanism of confined IL in SCPEs remain ambiguous. Herein, IL was immobilized on SiO2 (SiO2@IL-C) and then used to prepare the confined SCPEs together with LiTFSI and PEO to study the impacts of confined-IL on the properties and performance of electrolytes and reveal the Li+ transport mechanism. The results show that, compared to the IL-unconfined SCPE, the IL-confined ones exhibit better performance of electrolytes and cells, such as higher ionic conductivity, higher tLi+, and wider electrochemical windows, as well as more stable cycle performance, due to the increased dissociation degree of lithium salt and enlarged polymer amorphousness. The finite-element/molecular-dynamics simulations suggest that the IL confined on the SiO2 provided an additional Li+ transport pathway (Li+ → SiO2@IL-C) that can accelerate ion transfer and alleviate lithium dendrites, leading to ultrastable stripping/plating cycling over 1900 h for the Li/SCPEs/Li symmetric cells. This study demonstrates that IL-confinement is an effective strategy for the intelligent approach of high-performance lithium metal batteries.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
Nyckelord
- Ionic liquid
- Confinement
- Ionic transport pathway
- Lithium-ion transport kinetics
- Lithium metal batteries
- Energiteknik
- Energy Engineering
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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