Mo Youtian, Meng Wei, Xia Yanlin, Du Xusheng
Institute of Advanced Wear & Corrosion Resistance and Functional Materials, Jinan University, Guangzhou 510632, China.
School of Aerospace, Mechanical and Mechatronic Engineering J07, University of Sydney, Sydney, NSW 2006, Australia.
Polymers (Basel). 2019 Aug 16;11(8):1357. doi: 10.3390/polym11081357.
In this work, the effects of utilizing an Fe/Fe redox-active electrolyte and Fe-doped polyaniline (PANI) electrode material on the performance of an assembled supercapacitor (SC) were studied. The concentration of the redox couple additive in the electrolyte of the SC was optimized to be 0.5 M. With the optimized concentration of 0.4 M Fe, the doped PANI branched nanofibers electropolymerized onto titanium mesh were much thinner, cleaner, and more branched than normal PANI. A specific capacitance (C) of 8468 F g for the 0.4 M Fe/PANI electrode in the 1 M HSO + 0.5 M Fe/Fe gel electrolyte and an energy density of 218.1 Wh kg at a power density of 1854.4 W kg for the resultant SC were achieved, which were much higher than those of the conventional PANI electrode tested in a normal HSO electrolyte (404 F g and 24.9 Wh kg). These results are among the highest reported for PANI-based SCs in the literature so far and demonstrate the potential effectiveness of this strategy to improve the electrochemical performance of flexible SCs by modifying both the electrode and electrolyte.
在这项工作中，研究了使用铁/铁氧化还原活性电解质和铁掺杂聚苯胺（PANI）电极材料对组装超级电容器（SC）性能的影响。将超级电容器电解质中氧化还原对添加剂的浓度优化为0.5 M。在铁浓度为0.4 M时，电聚合在钛网上的掺杂聚苯胺支化纳米纤维比普通聚苯胺更细、更纯净且分支更多。在1 M硫酸 + 0.5 M铁/铁凝胶电解质中，0.4 M铁/聚苯胺电极的比电容（C）为8468 F/g，所得超级电容器在功率密度为1854.4 W/kg时的能量密度为218.1 Wh/kg，这远高于在普通硫酸电解质中测试的传统聚苯胺电极（404 F/g和24.9 Wh/kg）。这些结果是迄今为止文献中报道的基于聚苯胺的超级电容器中最高的之一，证明了通过同时修饰电极和电解质来提高柔性超级电容器电化学性能这一策略的潜在有效性。
