电解质
离子液体
材料科学
电池(电)
锂(药物)
聚合物
聚合物电解质
化学工程
离子键合
锂电池
离子电导率
复合材料
无机化学
化学
离子
有机化学
电极
工程类
热力学
功率(物理)
催化作用
医学
物理
物理化学
内分泌学
作者
Nor Fazila Mahamad Yusoff,N. H. I dris
标识
DOI:10.15282/jmes.11.4.2017.18.0284
摘要
The microstructure of a polymer blend as a gel polymer electrolyte affects significantly the electrochemical performances of a Lithium ion battery.Therefore, an appropriate control of the composition of the blending is crucial to obtain a porous structure.In this paper, PVDF/PMMA membrane was successfully prepared via phase-separation method by using salicylic acid as a foaming agent to produce a porous structure within the polymer blend matrix.Ionic liquid-salt mixtures of 1-ethyl-3 methyl imidazolium triflouromethanysulfonyl imide and lithium bis-triflouromethylsulfonyl imide were used to activate the PVDF/PMMA membrane.The as-prepared PVDF/PMMA membrane contains pores when observed from scanning electron microscope, which leads to the high ionic-liquid electrolyte uptake.The membrane with 10 wt% PVDF and 90 wt% PMMA exhibited a high ionic conductivity of 3.097 mS cm -1 at room temperature with high lithium ion transference number (0.7922) and wide electrochemical stability window (4.3 V).Its electrochemical performance was evaluated by LiFePO4 half-cell, suggesting that this ionic-liquid gel polymer electrolyte is possible to be developed as an electrolyte in lithium rechargeable battery.
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