采用沉淀法合成了不同钴锰含量的碳纳米管(CNTs)/钴锰氧化物纳米复合材料.利用XRD、SEM、TEM、BET和FT-IR等方法对材料进行了表征,考察了不同复合材料对锂空气电池放电及充电过程的影响,同时对循环性能进行了研究.结果表明:钻锰比例为4∶0与0∶4时,产物为CNTs/Co3O4与CNTs/Mn3O4,钴锰比例为3∶1、2∶2、1∶3时,产物为CNTs/(Co,Mn)(Co,Mn)2O4.产物具有良好的分散性能,氧化物负载在碳管表面,其中CNTs/Mn3O4的分散性能最好.随着锰含量的增加,电池的放电性能提高,CNTs/Mn3O4的放电电压达到2.92 V.随着钴含量的增加,电池的充电性能提高,充电电压最低为3.80 V.钴锰比为3∶1时的产物充放电过电势(△ V)仅为1.05 V,5次循环后依然保持着良好的放电性能.
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