通过电化学法使溶液中的Mn2电解氧化为MnO2,沉积复合在石墨烯片膜上,形成由MnO2/石墨烯复合材料构成的纸电极.采用X射线衍射(XRD)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)、循环伏安(CV)和恒流放电等技术手段对纸电极材料的结构、形貌以及电化学性能进行了研究.结果表明,MnO2球形颗粒均匀地沉积在石墨烯片膜上,形成了厚度45 μm的纸电极,经过380℃煅烧后,纸电极中的MnO2晶型由γ-MnO2转化为β/γ-MnO2混合晶型,是良好的柔性Li/MnO2电池的电极材料.MnO2/石墨烯纸电极在室温下0.1C放电容量达269 mA·h/g,而且电化学阻抗低、柔韧性好.
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