Polymeric gel electrolyte containing alkyl phosphate for lithium-ion batteries
Polymeric gel electrolyte containing alkyl phosphate for lithium-ion batteries
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DOI：
10.1016/j.jpowsour.2005.03.114
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发表时间：
2005-08
影响因子：
9.2
通讯作者：
M. Morita;Y. Niida;N. Yoshimoto;K. Adachi
中科院分区：
文献类型：
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作者：
M. Morita;Y. Niida;N. Yoshimoto;K. Adachi
已开发出用于可充电锂电池系统的不可燃聚合物凝胶电解质膜。 The gel film consists of poly(vinylidenefluoride-co-hexafluoropropylene) (PVdF-HFP) swollen with LiPF6solution of a ternary solvent containing nonflammable trimethyl phosphate (TMP).在碳酸乙烯酯加碳酸二乙酯(EC+DEC)混合溶剂中添加TMP可防止LiPF6盐的热分解。含有20vol%或更高含量TMP的LiPF6溶液具有阻燃性。在液体组分中含有 55vol% TMP 的液体和凝胶电解质体系均获得了高离子电导率：20°C 时，液体为 7.1×10−3Scm−1，凝胶电解质为 2.9×10−3Scm−1。 A wide potential window (−0.5 to 4.5V versus Li/Li+) and the redox activity of the electrode materials were established for the gel electrolyte containing TMP.
A nonflammable polymeric gel electrolyte film has been developed for rechargeable lithium battery systems. The gel film consists of poly(vinylidenefluoride-co-hexafluoropropylene) (PVdF-HFP) swollen with LiPF6solution of a ternary solvent containing nonflammable trimethyl phosphate (TMP). The addition of TMP to mixed ethylene carbonate plus diethyl carbonate (EC+DEC) solvent prevented the LiPF6salt from the thermal decomposition. The LiPF6solutions containing 20vol% or higher content of TMP were fire-retardant. High ionic conductivity was obtained for both the liquid and the gel electrolyte systems containing 55vol% of TMP in the liquid components: 7.1×10−3Scm−1for the liquid and 2.9×10−3Scm−1for the gel electrolytes at 20°C. A wide potential window (−0.5 to 4.5V versus Li/Li+) and the redox activity of the electrode materials were established for the gel electrolyte containing TMP.