聚苯胺/改性活性炭复合电极材料的制备及其电容性能研究

通过改变有机酸与无机酸的配比研究合成高电导率聚苯胺的最佳条件,使用硝酸对活性炭进行改性,测定活性炭的沉降质量和活化指数并筛选出吸附性能最佳的改性活性炭,将最佳工艺条件下合成的聚苯胺与改性活性炭进行复合制备了聚苯胺/改性活性炭复合电极材料。通过X射线衍射、扫描电子显微镜和电化学性能测试对复合电极材料的结构和性能进行表征和研究。结果表明:用质量分数3%的硝酸改性的活性炭掺杂聚苯胺,二者的相容性最好,且改性活性炭含量为25.5%(质量分数)时,制备的复合电极材料比电容最大,为282F/g,比纯聚苯胺的比容量(210F/g)增加了34.3%。电化学性能测试表明,聚苯胺/改性活性炭复合电极材料内阻小,阻抗高,电容性能优良。

Preparation of PAN/modified AC composite electrode material and its capacitive performance

The optimal conditions for the synthesis of high-conductivity polyaniline were studied by changing the ratio of organic acids to inorganic acids.The PAN/modified AC composite electric material was prepared by combining the synthesized PAN with modified AC under the best technology.The structure and performance of the material were characterized and studied by X-ray diffraction,scanning electron microscopy,and electro chemical performance testing.The results shown that:the activated carbon modified with nitric acid with a mass fraction of 3% was doped with polyaniline,the two had the best compatibility,and the specific capacitance of the prepared material was 25.5%(mass fraction)of the modified activated carbon.The maximum was 282 F/g,which had a specific capacity(210 F/g)increase of 34.3% compared to pure polyaniline.Electrochemical performance tests shown that the composite had small internal resistance,high impedance and excellent capacitance performance.