Polyaniline nanotubes (PANI-T) and graphene oxide (GO) have been compounded by a postcomposition method with the assistance of electrostatic adsorption. Using this so-called postcomposition method, both the electric double-layer capacitance of the GO and the pseudocapacitance of the conducting polymer can be utilized. PANI-T prepared by a rapid mixing method was positively charged by pretreatment with (3-aminopropyl)triethoxysilane (APTES). PANI/GO composites were obtained by mixing the positively charged PANI-T and negatively charge GO with the assistance of electrostatic attraction. Charge–discharge measurements in 1 mol L⁻¹ H₂SO₄ aqueous electrolyte revealed that the specific capacitance of PANI-T/GO-10% could reach 1220 F g⁻¹ at a current density of 0.5 A g⁻¹, being much higher than the value of 648 F g⁻¹ for PANI-T. After 500 cycles of charge–discharge testing, the composite retained 97% of its capacitance. These enhanced supercapacitive properties can be attributed to the two types of energy storage mechanism and the electrostatic interaction between GO and PANI-T. Preparation of such PANI-T/GO composite electrode materials by electrostatic adsorption thus provides an efficient approach for improvement of the supercapacitive properties of conducting polymers or metal oxides.

聚苯胺纳米管（PANI-T）和氧化石墨烯（GO）已通过后组合法在静电吸附的帮助下进行了复合。使用这种所谓的后合成方法，可以利用GO的双电层电容和导电聚合物的假电容。通过快速混合方法制备的PANI-T通过用（3-氨基丙基）三乙氧基硅烷（APTES）进行预处理而带正电。通过将带正电的PANI-T和带负电的GO在静电吸引的帮助下混合，可以得到PANI / GO复合材料。在1 mol L ^-1 H ₂ SO ₄水性电解质中的充放电测量表明，PANI-T / GO-10％的比电容可达到1220 F g ^-1电流密度为0.5 A g ^-1时，远高于PANI-T的648 F g ^-1值。经过500次充放电测试后，复合材料保留了其97％的电容。这些增强的超电容特性可以归因于两种类型的能量存储机制以及GO和PANI-T之间的静电相互作用。因此，通过静电吸附制备这种PANI-T / GO复合电极材料提供了一种改善导电聚合物或金属氧化物超电容性能的有效方法。