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Poly(vinylidene‐ co ‐hexafluoropropylene) membrane modified with glass fibers and polyvinyl pyrrolidone: Mechanical and electrochemical properties
Author(s) -
Zheng Pengxuan,
Qiu Jiye,
Wang Xiangwei,
Yu Zhiwei,
Ma Yong,
Li Tingxi
Publication year - 2021
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.50229
Subject(s) - hexafluoropropylene , materials science , electrolyte , membrane , chemical engineering , thermal stability , ultimate tensile strength , electrochemistry , polyvinyl alcohol , ionic conductivity , composite number , polymer , polymer chemistry , composite material , copolymer , chemistry , electrode , biochemistry , tetrafluoroethylene , engineering
The polymer electrolytes based on poly(vinylidene‐ co ‐hexafluoropropylene) (PVDF‐ co ‐HFP) have been widely studied and applied in devices for its excellent electrochemical and mechanical properties. Here, porous PVDF‐ co ‐HFP membrane modified with glass fibers (GFs) and polyvinyl pyrrolidone (PVP) were fabricated by phase‐transfer method. When the dosage of GFs exceeded 1 wt%, the composite membranes exhibited 6.11 MPa tensile strength. When the dosage of GFs and PVP reached 1% (PVP 1 GF 1 ), respectively, the composite membranes in porous network structure possessed the highest electrolyte uptake of 251.02%, the thermal stability of 343°C and the ionic conductivity of 3.05 × 10 −3 S cm −1 . Electrochromic device (ECD) was assembled with PVP 1 GF 1 electrolyte, showing quick responses between the bleached and the color states within 3 s. The PVDF‐ co ‐HFP composite electrolyte was expected to be effective substitutes for liquid electrolytes used in ECDs.