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Facile hydrothermal synthesis of tubular kapok fiber/MnO2 composites and application in supercapacitors

机译:管状木棉纤维/ MnO2复合材料的简易水热合成及其在超级电容器中的应用

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摘要

Kapok fiber/MnO2 (TKF/MnO2) composites with a tubular structure are successfully fabricated via a facile hydrothermal process. Potassium permanganate and kapok fiber served as the manganese source and the template, respectively. The effects of operating parameters including material proportion, reaction temperature, reaction time and the growth mechanism of MnO2 are studied in detail. A maximum specific capacitance of 117 F g(-1) has been achieved at 0.25 A g(-1) in 1 M Na2SO4 and 95% specific capacitance is maintained after 1000 cycles, which demonstrates the potential application of tubular TKF/MnO2 composites in supercapacitors. The superior electrochemical performances of the obtained composites are attributed to their hollow structure, thin wall thickness, and orderly pore passages, which can facilitate ion diffusion and improve the utilization of the electroactive sites of MnO2.
机译:通过简便的水热工艺成功地制备了具有管状结构的木棉纤维/ MnO2(TKF / MnO2)复合材料。高锰酸钾和木棉纤维分别用作锰源和模板。详细研究了操作参数对材料比例,反应温度,反应时间和MnO2生长机理的影响。在1 M Na2SO4中在0.25 A g(-1)时已达到117 F g(-1)的最大比电容,经过1000次循环后,仍保持95%的比电容,这表明管状TKF / MnO2复合材料可在超级电容器。所得复合材料的优异电化学性能归因于它们的中空结构,薄壁厚度和有序的孔通道,这可以促进离子扩散并提高MnO2电活性位的利用率。

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