利用氨水脱掺杂的本征态聚苯胺为电极材料,研究了本征态聚苯胺在不同类型质子酸电解液(硫酸、硫酸-磺基水杨酸、硫酸-柠檬酸、硫酸-对甲苯磺酸)中的赝电容性能,探讨了不同类型的质子酸电化学掺杂对本征态聚苯胺微观结构和电化学性能的影响。结果表明:质子酸电解液在外加电场的作用下对本征态聚苯胺发生电化学掺杂,继而利用界面氧化还原化学反应产生赝电容,在所有的酸性电解液中,本征态聚苯胺均表现出较高的导电率和比电容,有机酸类型对其微观形貌和电化学性能有较大影响,经硫酸和对甲苯磺酸掺杂的本征态聚苯胺具有疏松的颗粒和棒状结构的混合体,在电流密度为1A/g的条件下,比电容高达864.6F/g,经2000次循环充放电后,电容保持率达到54.9%。
The pseudo capacitance properties of intrinsic polyaniline in the different types of proton acid electrolytes (sulfuric acid,sulfuric acid -sulfosalicylic acid,sulfuric acid-citric acid,sulfuric acid-p-toluenesulfonic acid) were studied by using ammonia water de doped intrinsic polyaniline as electrode material.The effects of the different types of proton acid electrochemical doping on the microstructure and electrochemical properties of intrinsic polyaniline were discussed.The results showed that the protonic acid electrolyte was electrochemically doped with the intrinsic polyaniline under the action of an applied electric field,and then an interfacial redox chemical reaction occurred to form a pseudo capacitance.Among all acidic electrolytes,the intrinsic polyaniline presented the highest conductivity and specific capacitance,and the type of organic acid had a great influence on its micro morphology and electrochemical properties.The intrinsic polyaniline doped with sulfuric acid and p-toluenesulfonic acid was a mixture of loose particles and rod structure,and its specific capacitance was as high as 864.6f/g at the current density of 1A/g.After 2000 cycles of charge and discharge,the capacitance retention rate reached to 54.9%.
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基金资助
国家自然科学基金(51503092和51663014)
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