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首页> 外文期刊>RSC Advances >Surface modification of cellulose scaffold with polypyrrole for the fabrication of flexible supercapacitor electrode with enhanced capacitance
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Surface modification of cellulose scaffold with polypyrrole for the fabrication of flexible supercapacitor electrode with enhanced capacitance

机译：用聚吡咯对纤维素支架进行表面改性，以制造具有增强电容的柔性超级电容器电极

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摘要

Surface modification of a cellulose scaffold for the preparation of a flexible conductive composite has been carried out using a template-polymerization method. The effects of the concentration of the pyrrole and the reaction time on the structure and properties of the composites have been investigated. The as prepared polypyrrole/cellulose composites integrated the merits of cellulose with the conductive polypyrrole (Ppy), the structurally defined Ppy/cellulose composites exhibited electrical conductivity as high as 0.59 S cm(-1) with a Ppy content of only about 28.89 wt%. Furthermore, it was foldable and could be used as flexible electrode for a supercapacitor. The specific capacitance of CPy-005 was about 392-308 F g(-1) at current densities ranging from 0.1 to 0.4 A g(-1), and kept a high stability during the charge-discharge cycle; the capacity was decreased by only 18% after 1000 cycles at a current density of 0.4 A g(-1). The unique porous bulk structure and rough surface properties enabled the construction of cellulose based flexible supercapacitors with reasonably good performance and a low price, which would provide a candidate for future "green" and "use-once-and-throw-away" electronics.
机译：已经使用模板聚合方法对用于制备柔性导电复合材料的纤维素支架进行表面改性。研究了吡咯浓度和反应时间对复合材料结构和性能的影响。所制备的聚吡咯/纤维素复合材料结合了纤维素与导电聚吡咯（Ppy）的优点，结构限定的Ppy /纤维素复合材料显示出高达0.59 S cm（-1）的电导率，且Ppy含量仅为约28.89 wt％ 。此外，它是可折叠的，可以用作超级电容器的柔性电极。在电流密度范围为0.1至0.4 A g（-1）的情况下，CPy-005的比电容约为392-308 F g（-1），并且在充放电循环中保持较高的稳定性。在电流密度为0.4 A g（-1）的情况下，经过1000次循环后，容量仅降低了18％。独特的多孔块状结构和粗糙的表面特性使纤维素基柔性超级电容器的结构具有相当好的性能和较低的价格，这将为将来的“绿色”和“一次性使用和丢弃”电子产品提供候选。

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