采用水热法合成了MnO2/石墨烯复合材料,通过扫描电子显微镜( SEM)分析了材料的表面形貌,通过X射线衍射(XRD)和X射线光电子能谱(XPS)表征了材料的晶相结构和组成,采用恒流放电的方式对LiSi/LiCl-KCl/( MnO2/G)单体电池进行了电性能的测试。测试结果表明反应体系中加入GO后获得的材料由大量的纳米花球式和纳米棒式结构无规则的交织排列在一起,α-MnO2纳米簇结构依附在石墨烯纳米片上；产物在2θ为22°~27°时出现了较宽的无序堆叠的石墨烯的衍射峰；Mn元素氧化后离子状态为Mn4+；LiSi/LiCl-KCl/( MnO2/G)单体电池有两个放电平台,分别为2.58 V、1.96 V,放电电压截止到1.0 V时,对应的放电比容量达到1150.2 mAh/g。
MnO2/graphene composites were synthesized by hydrothermal method. The surface morphology of the material was analyzed by scanning electron microscope ( SEM ) . The crystal phase structure and composition of the materials were characterized by X-ray diffraction ( XRD ) and X-ray photoelectron spectroscopy ( XPS ) . The electrical properties of LiSi/LiCl-KCl/ ( MnO2/G ) cell were tested by the method of constant current discharge. The test results show that adding of GO into the reaction system made the material is composed of nano-ball type and a large number of irregular nanorods structure woven together, and the α-MnO2 nanoclusters structure attach to graphene nanosheets. The disorder wide diffraction peaks of product during 2θ of 22°-27° is graphene. After oxidation of Mn element, the ion state of the Mn element is changed into Mn4+. The LiSi/LiCl-KCl/ ( MnO2/G) cell has two discharge platforms for 2. 58 V and 1. 96 V, respectively, when discharge voltage cut-off to 1. 0 V, the corresponding discharge specific capacity reach 1150. 2 mAh/g.
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