Mn3O4 as a Mn precursor was allowed to in-situ react with grapheme oxide (GO) generating Mn3O4/GO nanocomposite as a candidate electrode material of supercapacitors. The morphology, microstructure, and phase composition of as-obtained nanocomposite were analyzed by means of scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. The electrochemical properties and capacitive behavior of the nanocomposite were examined using alternating current impedance spectroscopic analysis and galvanostatic charge/ discharge measurements. Results indicate that the incorporation of GO contributes to improve ' the conductivity and stability of the nanocomposite as well as the supercapacitive behavior of Mn3O4. As a result, as-prepared Mn3O4/GO nanocomposite has a high specific capacitance (350 F/g) and a long cycle life (over 1 000 times).%利用锰前驱体与氧化石墨烯(GO)原位反应制备了Mn3O4/GO纳米复合物超级电容器电极材料；采用扫描电镜、透射电镜及X射线衍射仪分析了纳米复合物的形貌和结构；并利用交流阻抗分析及充放电测试测定了纳米复合材料的电化学性质和电容性质.结果表明,引入氧化石墨烯可增强纳米复合物的导电性及稳定性, 提高Mn3O4的电容特性,从而使得纳米复合物具有较高的比电容(350F/g)和较长的循环寿命(超过1 000次).
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