阮艳莉,查煜澄,张萌

• 1:天津工业大学化学与化工学院

摘要(Abstract)：

为利用有机金属框架衍生的碳材料来提高锂硫电池的电化学性能,采用溶剂热法首先合成出有机金属框架2-甲基咪唑锌盐MOF材料(ZIF-8),再通过管式炉高温碳化形成沸石咪唑盐骨架衍生的多孔碳材料(ZPC),并将其用于对锂硫电池的隔膜改性;采用SEM观察材料的形貌,通过N_2吸附-脱附实验测量ZPC的比表面积,用恒流充放电测试材料的电化学性能,并与传统碳材料Super P进行对比。结果表明:ZPC比表面积为972.238 m~2/g,远大于Super P的比表面积;0.1 C倍率条件下,ZPC改性隔膜组装电池的初始放电比容量达到1 315.0 mA·h/g,优于普通PP隔膜电池(1 256.5 mA·h/g)和Super P改性隔膜电池(1 288.1 mA·h/g);循环50圈后,ZPC改性隔膜电池放电比容量仍可达到907.1 mA·h/g,比普通隔膜电池和Super P改性隔膜电池分别提高了74.4%和15.2%;并且每圈的库伦效率都大于97%,表现出了较好的充放电性能和循环稳定性。

关键词(KeyWords)： 有机金属框架;多孔碳材料;溶剂热;锂硫电池;隔膜改性;电化学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(21403153)

作者(Author): 阮艳莉,查煜澄,张萌

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