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- 2015
四种晶型MnO2超级电容器电极材料的电化学性能研究
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Abstract:
摘要 用尽量简便的方法制备出δ、α、β及γ型4种MnO2粉末. 通过X射线衍射（XRD）、场发射扫描电镜（FSEM）、热重分析（TGA）与比表面积测试（BET）等方法对样品粉末性质进行分析，并对4种不同粉末制成的电极进行循环伏安、恒流充放电及稳定性测试. 结果表明，4种MnO2都具有良好的电容特性，其中α-MnO2具有最高的比表面积与孔隙率，故其电极比容量最高，但其大电流放电时的倍率特性较差. 其余3种MnO2比表面积相当，而β-MnO2虽然比容量较低，但其简单的孔隙结构使其拥有最好的倍率特性与稳定性
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