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MnO2-doped, polyaniline-grafted rice husk ash nanocomposites and their electrochemical capacitor applications

机译:MnO2掺杂的聚苯胺接枝稻壳灰纳米复合材料及其电化学电容器的应用

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摘要

The utilization of renewable rice husk ash (RHA) in an energy storage system without any activation is described. Polyaniline-grafted RHA (PANI/RHA) and MnO2-doped, polyaniline-grafted RHA (PANI/MnO2/RHA) nanocomposites were developed. The capacitance behaviour of the developed nanocomposites was well studied using cyclic voltammetry and charge-discharge methods. The results of galvanostatic charging and discharging show a 17-fold improvement in capacitance behaviour of PANI/RHA and a 54-fold enhanced capacitance of PANI/MnO2/RHA nanocomposites compared to that of neat RHA. The enhanced capacitance and rate capability of RHA are attributed to the synergistic effect of polyaniline with RHA and also the high utilization of pseudo-active species for ion/electron transfer.
机译:描述了在没有任何激活的情况下在能量存储系统中利用可再生稻壳灰(RHA)。开发了聚苯胺接枝的RHA(PANI / RHA)和MnO2掺杂的聚苯胺接枝的RHA(PANI / MnO2 / RHA)纳米复合材料。使用循环伏安法和充放电方法很好地研究了开发的纳米复合材料的电容行为。恒电流充电和放电的结果表明,与纯RHA相比,PANI / RHA的电容性能提高了17倍,而PANI / MnO2 / RHA纳米复合材料的电容提高了54倍。 RHA的电容和倍率能力增强归因于聚苯胺与RHA的协同效应,以及假离子物质在离子/电子转移中的高利用率。

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