阮艳莉,张萌,顾祥顺,王天宇

• 1:天津工业大学化学与化工学院

摘要(Abstract)：

为了降低电池极化现象,提升锂氧电池的电化学性能,采用液相扩散法制备锶掺杂的ZIF-8催化剂材料。以硝酸锶和乙酸锌为金属离子本体原料,以2-甲基咪唑为有机配体,以聚乙烯吡咯烷酮为结构导向剂,液相扩散获得锶掺杂的ZIF-8催化剂材料,并通过SEM和TEM测试考察材料的形貌,TGA测试验证材料的结构稳定性,同时借助电化学设备测试材料的电化学性能。实验结果表明:当硝酸锶和乙酸锌的摩尔比为2∶1时,得到的Sr-ZIF-8材料呈六边形片状的形貌;TGA测试表明该材料有较好的结构稳定特性;将材料制成电极应用到锂氧电池中,在100 mA/g的电流密度下,进行恒流充放电测试时,电池首圈可获得4 048.5 mA·h/g的放电比容量,放电平台电压值为2.67 V,放电过程的过电势仅为0.29 V;在进行限容300 m A·h/g的条件下,同样的电流密度下可循环27圈,表现出了较好的循环稳定性能。

关键词(KeyWords)： 锂氧电池;ZIF-8;掺杂;正极催化剂;液相扩散法;结构导向剂

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,张萌,顾祥顺,王天宇

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