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A Composite Gel Polymer Electrolyte with High Performance Based on Poly(Vinylidene Fluoride) and Polyborate for Lithium Ion Batteries
Author(s) -
Zhu Yusong,
Xiao Shiying,
Shi Yi,
Yang Yaqiong,
Hou Yuyang,
Wu Yuping
Publication year - 2014
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201300647
Subject(s) - materials science , electrolyte , separator (oil production) , ionic conductivity , composite number , polyvinyl alcohol , fluoride , chemical engineering , polymer , electrochemistry , membrane , solvent , lithium (medication) , inorganic chemistry , composite material , organic chemistry , chemistry , electrode , medicine , biochemistry , physics , engineering , thermodynamics , endocrinology
A composite membrane based on electrospun poly(vinylidene fluoride) (PVDF) and lithium polyvinyl alcohol oxalate borate (LiPVAOB) exhibiting high safety (self‐extinguishing) and good mechanical property is prepared. The ionic conductivity of the as‐prepared gel polymer electrolyte from this composite membrane saturated with 1 mol L −1 LiPF 6 electrolyte at ambient temperature can be up to 0.26 mS cm −1 , higher than that of the corresponding well‐used commercial separator (Celgard 2730), 0.21 mS cm −1 . Moreover, the lithium ion transference in the gel polymer electrolyte at room temperature is 0.58, twice as that in the commercial separator (0.27). Furthermore, the absorbed electrolyte solvent is difficult to evaporate at elevated temperature. Its electrochemical performance is evaluated by using LiFePO 4 cathode. The obtained results suggest that this gel‐type composite membrane shows great possibilities for use in large‐capacity lithium ion batteries that require high safety.