采取溶胶凝胶法在活性炭表面合成RuO2·xH2O,经150℃热处理制得炭钌复合材料.将炭钌复合电极作为碱性电化学电容的正极,研究不同钌含量复合电极的电化学性能,实验证实,当复合电极中的钌质量分数达30%时,其比电容可从纯活性炭电极的241 F/g增加到333 F/g,且复合电极具有与活性炭电极同样优异的高功率放电特性;随着复合电极中钌含量的增加,电极的比电容也会相应地增加,而当电极中的钌质量分数大于10%后,水合氧化钌的贡献比电容却逐渐下降,并稳定在440 F/g左右.
Hydrous ruthenium oxide was synthesized by a sol-gel method on the surface of activated carbon (AC).After heat treatment at 150℃, the RuO2/AC composite was used as a positive electrode material in an alkaline electrochemical capacitor. Several composites with different Ru content were prepared and studied. It was found that the composite containing 30w/% Ru had a specific capacitance of about 333 F/g at a low current density, whereas that of the pure AC was only about 241 F/g. With an increase of Ru content, the specific capacitance of the electrode increased cor440 F/g. The performance of the composite under the condition of high rate discharge was as good as that of the AC electrode.
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