A nanostructured graphene/polyaniline hybrid material for supercapacitors
A nanostructured graphene/polyaniline hybrid material for supercapacitors
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DOI：
10.1039/c0nr00224k
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发表时间：
2010-01-01
期刊：
影响因子：
6.7
通讯作者：
Wang, Xin
中科院分区：
文献类型：
--
作者：
Wang, Hualan;Hao, Qingli;Wang, Xin
通过原位聚合-还原/去掺杂-重掺杂工艺合成了作为超级电容器电极的柔性石墨烯/聚苯胺杂化材料。该产品首先在乙二醇介质中制备，然后用热氢氧化钠溶液处理，得到还原氧化石墨烯/聚苯胺杂化材料。氢氧化钠还充当复合材料中聚苯胺的去掺杂剂。在酸性溶液中重掺杂后，获得了薄的、均匀的、柔性的导电石墨烯/聚苯胺产品，且形态未发生变化。通过X射线光电子能谱和拉曼光谱对材料的化学结构进行了表征。该复合材料表现出比纯单个组件更好的电化学性能。超级电容器获得了1126 F g(-1)的高比电容，1000次循环后保持寿命为84%。能量密度和功率密度也优于纯组分材料。
A flexible graphene/polyaniline hybrid material as a supercapacitor electrode was synthesized by an in situ polymerization-reduction/dedoping-redoping process. This product was first prepared in an ethylene glycol medium, then treated with hot sodium hydroxide solution to obtain the reduced graphene oxide/polyaniline hybrid material. Sodium hydroxide also acted as a dedoping reagent for polyaniline in the composite. After redoping in an acidic solution, the thin, uniform and flexible conducting graphene/polyaniline product was obtained with unchanged morphology. The chemical structure of the materials was characterized by X-ray photoelectron spectroscopy and Raman spectroscopy. The composite material showed better electrochemical performances than the pure individual components. A high specific capacitance of 1126 F g(-1) was obtained with a retention life of 84% after 1000 cycles for supercapacitors. The energy density and power density were also better than those of pure component materials.