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首页> 外文期刊>Journal of power sources >Preparation and electrochemical performance of gel polymer electrolytes using tri(ethylene glycol) dimethacrylate
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Preparation and electrochemical performance of gel polymer electrolytes using tri(ethylene glycol) dimethacrylate

机译:三乙二醇二甲基丙烯酸酯凝胶聚合物电解质的制备及电化学性能

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摘要

A gel polymer electrolyte (GPE) is prepared from tri(ethylene glycol) dimethacrylate monomer, benzoyl peroxide, and 1.0 M ethylene carbonaterdiethyl carbonate (1:1 vol.%). The LiCoO_2 lgraphite cells are assembled and their electrochemical properties are evaluated at various current densities and temperatures. The viscosity of the precursor containing 5 vol.% tri(ethylene glycol) dimethacrylate monomer is around 4.6 mPa s. The ionic conductivity of the gel polymer electrolyte at 20℃ is around 5.9 x 10~(-3) S cm~(-1). The gel polymer electrolyte has good electrochemical stability up to 4.5 V versus Li/Li~+. The capacity of the cell at the 1.0 C rate is 89% of the discharge capacity at the 0.2 C rate. The capacity of the cell at temperature of ―10℃ is 81% of the discharge capacity at 20℃. The discharge capacity of the cell with gel polymer electrolyte is stable with charge-discharge cycling.
机译:由三(乙二醇)二甲基丙烯酸酯单体,过氧化苯甲酰和1.0M碳酸亚乙酯碳酸二乙酯(1体积%)制备凝胶聚合物电解质(GPE)。组装LiCoO_2石墨电池,并在各种电流密度和温度下评估其电化学性能。包含5体积%的三(乙二醇)二甲基丙烯酸酯单体的前体的粘度为约4.6mPa·s。凝胶聚合物电解质在20℃时的离子电导率约为5.9 x 10〜(-3)S cm〜(-1)。相对于Li / Li〜+,凝胶聚合物电解质在高达4.5 V的电压下具有良好的电化学稳定性。 1.0 C速率下的电池容量是0.2 C速率下的放电容量的89%。温度为―10℃时,电池的容量为20℃时的放电容量的81%。具有凝胶聚合物电解质的电池的放电容量在充放电循环中是稳定的。

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