Free-Standing, Robust, and Stable Li+ Conductive Li(Sr,Zr)2(PO4)3/PEO Composite Electrolytes for Solid-State Batteries
SCIE
SCOPUS
- Title
- Free-Standing, Robust, and Stable Li+ Conductive Li(Sr,Zr)2(PO4)3/PEO Composite Electrolytes for Solid-State Batteries
- Authors
- Park, Hyemin; Lee, Eun Gyu; Kim, So-Yeon; Seong, Si Jin; Suh, Jae Yong; Wu, Mihye; Kang, Yongku; Choi, Si-Young; Kim, Yongseon; Choi, Sungho
- Date Issued
- 2021-12-27
- Publisher
- AMER CHEMICAL SOC
- Abstract
- We developed promising soft-rigid and free-standing composite electrolytes by mixing a Sr-doped LiZr2(PO4)3 compound with a poly(ethylene oxide) (PEO)-based polymer for Li+-ion conductors. Using crystal formation modeling, we synthesized a thermodynamically stable Li(Sr,Zr)2(PO4)3 compound with the formation of composite electrolytes via PEO-based in situ radical polymerization, which possessed a good ionic conductivity (5.75 × 10-4 S cm-1). The cell with Li/composite electrolyte/LiFePO4 showed a capacity retention rate of 80% after 100 cycles at room temperature. The corresponding composite electrolyte film demonstrated superior electrochemical behavior even when assembling pouch-type cells without any interfacial control during the cell assembly, that is, without post-treatment such as soaking liquid electrolytes or over-coated interlayers. This suggested that the optimal phosphate composition followed by the formation of a PEO-based polymer electrolyte will be suitable for Li+-ion transporting films and/or the Li metal protection layer for solid-state Li+-ion rechargeable batteries operating at room temperature.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/110105
- DOI
- 10.1021/acsaem.1c02784
- ISSN
- 2574-0962
- Article Type
- Article
- Citation
- Acs Applied Energy Materials, vol. 4, no. 12, page. 13974 - 13982, 2021-12-27
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