Evolution and function of residual solvent in polymer-Li2B12H12 composite solid electrolyte

Composite solid electrolytes (CSEs) containing polymer matrices and inorganic fillers hold promise for the next generation of solid-state batteries. However, the role of residual solvents in CSEs remains controversial. This study investigated the evolution and function of the residual solvent in a p...

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Bibliographic Details
Published in:Rare metals 2024, Vol.43 (8), p.3748-3757
Main Authors: Ye, Xiang-Yang, Bao, Ke-Pan, Luo, Sai-Nan, Li, Xin, Chen, Tai-Qiang, Xia, Shui-Xin, Yuan, Tao, Pang, Yue-Peng, Zheng, Shi-You
Format: Article
Language:English
Subjects:
Biomaterials
Bonding strength
Chemistry and Materials Science
Density functional theory
Dimethylformamide
Energy
Evolution
Hydrogen bonds
Lithium ions
Materials Engineering
Materials Science
Metallic Materials
Molten salt electrolytes
Nanoscale Science and Technology
Original Article
Physical Chemistry
Polymer matrix composites
Polymers
Polyvinylidene fluorides
Rechargeable batteries
Solid electrolytes
Solid state
Solvents
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Summary:Composite solid electrolytes (CSEs) containing polymer matrices and inorganic fillers hold promise for the next generation of solid-state batteries. However, the role of residual solvents in CSEs remains controversial. This study investigated the evolution and function of the residual solvent in a polymer-Li 2 B 12 H 12 CSE. A partial reaction occurred between Li 2 B 12 H 12 and solvent N, N-dimethylformamide (DMF), which produced dimethylaminomethanol (DMAM) in the CSE. Density functional theory calculations have revealed that DMAM forms stronger hydrogen bonds with polyvinylidene fluoride chains than DMF, which can have a plasticizing effect on the polymer matrix, leading to lower crystallinity and quicker segment motion. Therefore, this CSE exhibited improved Li-ion conducting properties, enabling the stable cycling of Li||LiFePO 4 solid-state batteries. This study provided insights into the role of residual solvents in CSEs.
ISSN:1001-0521
1867-7185
DOI:10.1007/s12598-024-02710-z