ERu-Mn-AC多元复合电极材料的电化学性能(英文)

Electrochemical Property of Ru-Mn-AC Multi-Element Composite Electrode Materials

以提高超级电容器电极材料的电化学性能为目的,在活性碳粉末中掺入二氧化钌和二氧化锰,作为电极材料的活性物质,从而制备氧化物/活性炭多元复合电极,组装成超级电容器单元。经循环伏安、恒流充放电和交流阻抗测试的结果表明:在活性碳粉末中掺入20%的二氧化锰时,复合电极的比容量为128F/g,阻抗为2.62Ω;在活性碳粉末中掺入二氧化钌和二氧化锰各20%时,多元复合电极的比容量为266F/g,阻抗为0.86Ω,经1500次循环充放电后,电容量几乎无衰减,得出由活性炭、二氧化钌和二氧化锰构成的多元复合电极是一种理想的超级电容器电极材料。

In order to improve the performances of electrode materials for super-capacitors, muRi-element composite electrodes were prepared using RuO2 and MnO2 as active materials, and active carbon as basic materials. Good electrochemical performances of the composite electrodes were eonfirraed by cyclic voltammetry, galvano static charge/discharge and ac impedance measurements. When the content of MnO2 is 20wt% in composite electrode materials, the specific capacitance of MnO2/AC composite electrodes can reach 128 F/g with a resistance of 2.62 Ω When the contents of RuO2 and MnO2 are separately 20wt% in composite electrode materials, the specific capacitance of RuO2/MnO2/AC composite electrodes can reach 266 F/g with a resistance of 0.86 Ωalmost without any change of capacitance during 1500 cycles of charge/discharge. It is indicated that the multi-factor composite electrodes with RuO2/MnO2 / AC are ideal electrode materials for super-capacitors.