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Enhancing mechanical properties of composite solid electrolyte by ultra-high molecular weight polymers.
Deng, Hongjie; He, Fa; Liu, Tongli; Ye, Meng; Wan, Fang; Guo, Xiaodong.
Affiliation
  • Deng H; School of Chemical Engineering, Sichuan University, Chengdu, 610065, People's Republic of China.
  • He F; School of Chemical Engineering, Sichuan University, Chengdu, 610065, People's Republic of China.
  • Liu T; School of Chemical Engineering, Sichuan University, Chengdu, 610065, People's Republic of China.
  • Ye M; School of Chemical Engineering, Sichuan University, Chengdu, 610065, People's Republic of China.
  • Wan F; School of Chemical Engineering, Sichuan University, Chengdu, 610065, People's Republic of China.
  • Guo X; School of Chemical Engineering, Sichuan University, Chengdu, 610065, People's Republic of China.
Nanotechnology ; 35(19)2024 Feb 23.
Article in En | MEDLINE | ID: mdl-38330458
ABSTRACT
Composite solid electrolytes combining the advantages of inorganic and polymer electrolytes are considered as one of the promising candidates for solid-state lithium metal batteries. Compared with ceramic-in-polymer electrolyte, polymer-in-ceramic electrolyte displays excellent mechanical strength to inhibit lithium dendrite. However, polymer-in-ceramic electrolyte faces the challenges of lack of flexibility and severely blocked Li+transport. In this study, we prepared polymer-in-ceramic film utilizing ultra-high molecular weight polymers and ceramic particles to combine flexibility and mechanical strength. Meanwhile, the ionic conductivity of polymer-in-ceramic electrolytes was improved by adding excess lithium salt in polymer matrix to form polymer-in-salt structure. The obtained film shows high stiffness (10.5 MPa), acceptable ionic conductivity (0.18 mS cm-1) and high flexibility. As a result, the corresponding lithium symmetric cell stably cycles over 800 h and the corresponding LiFePO4cell provides a discharge capacity of 147.7 mAh g-1at 0.1 C without obvious capacity decay after 145 cycles.
Key words

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Nanotechnology Year: 2024 Document type: Article

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Nanotechnology Year: 2024 Document type: Article