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- Title
PVDF/PAN/SiO polymer electrolyte membrane prepared by combination of phase inversion and chemical reaction method for lithium ion batteries.
- Authors
Liu, Liping; Wang, Zhan; Zhao, Zongkui; Zhao, Yujuan; Li, Fan; Yang, Libin
- Abstract
PVDF/PAN/SiO polymer electrolyte membranes based on non-woven fabrics were prepared via introducing a chemical reaction into Loeb-Sourirajan (L-S) phase inversion process. It was found that physical properties (porosity, electrolyte uptake and ionic conductivity) and electrochemical properties were obviously improved. A favorable membrane structure with fully connective porous and uniform pore size distribution was obtained. The effects of PVDF/PAN weight ratio on the morphology, crystallinity, porosity, and electrochemical performances of membranes were studied. The optimized PVDF/PAN (70/30 w/ w) (designated as M) polymer electrolyte membrane delivered excellent electrolyte uptake of 246.8 % and the highest ionic conductivity of 3.32 × 10 S/cm with electrochemical stability up to 5.0 V (vs. Li/Li). In terms of cell performance, the Li/M polymer electrolyte/LiFePO battery exhibited satisfactory electrochemical properties including high discharge capacity of 149 mAh/g at 0.2 C rate and good discharge performance at different current densities. The promising results reported here clearly indicated that PVDF/PAN/SiO polymer electrolyte membranes prepared by the combination of phase inversion and chemical reaction method were promising enough to be applied in power lithium ion batteries.
- Subjects
POLYELECTROLYTES; LITHIUM-ion batteries; CHEMICAL reactions; POLYETHYLENE; POLYMER blends
- Publication
Journal of Solid State Electrochemistry, 2016, Vol 20, Issue 3, p699
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-015-3095-1