Self-assembly of nanotubular polyaniline via surfactant for high-performance electrochemical supercapacitor
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In this work, a high-performance nanotubular polyaniline was achieved by the self-assembly process, where the cationic surfactant acts as a self-degraded soft template. The nanotubular polyaniline not only exhibits high specific capacitance, low electron transfer resistance, but also presents excellent cycling stability. The specific capacitance of nanotubular polyaniline reaches a maximum of 426.9 F g−1 at 0.5 A g−1 and maintains the value as high as 288.0 F g−1 at 5 A g−1, the cycling stability with capability retention 87.5% after 2000 cycles at 1 A g−1. Meanwhile, the specific surface area of the nanotubular polyaniline samples is 55.0 m2 g−1 and electron transfer resistance is 1.04 Ω cm2. Such excellent performance stems from the nanotubular structure, which facilitates the ion/electron transfer and effectively alleviates the agglomeration to guarantee a good permeability with the electrolyte.
Thanks to the financial support from the National Natural Science Foundation of China (51504111, 51564029), China Postdoctoral Science Foundation (2018M633418), Applied Basic Research Program of Yunnan Province (2019FD066), Analysis and Testing Foundation of Kunming University of Science and Technology (2018T20172015, 2018M20172102038).