在乙醇胺和水组成的混合溶剂中,Mn(Ac)2与氧化石墨烯一步反应得到还原石墨烯(RGO)与黑锰矿纳米颗粒(Mn3O4)组成的复合材料Mn3O4@RGO.以Mn3O4@RGO为正极,RGO为负极,组装得到了具有优良储能性能的非对称型超级电容器Mn3O4@RGO//RGO.基于活性物质的总质量,电容器的最大能量密度可达21.7 Wh/kg,相应的功率密度为0.5 kW/kg;同时,最大功率密度为8 kW/kg时,对应的能量密度为11.1 Wh/kg.Mn3O4@RGO//RGO还表现出良好的循环稳定性,在经历5000次循环后,比电容依然保持88.4％.电容器的良好储能性能可归因于在RGO表面生长的高密度Mn3O4纳米颗粒和RGO的良好导电性能.
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