Preparation of an Amide Group-Connected Graphene-Polyaniline Nanofiber Hybrid and Its Application in Supercapacitors
Preparation of an Amide Group-Connected Graphene-Polyaniline Nanofiber Hybrid and Its Application in Supercapacitors
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DOI：
10.1021/am300640y
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发表时间：
2012-06-01
影响因子：
9.5
通讯作者：
Li Songmei
中科院分区：
文献类型：
--
作者：
Liu Jianhua;An Junwei;Li Songmei
将聚苯胺(PANT)纳米纤维接枝到石墨烯上，得到一种新型的石墨烯-聚苯胺(GP)杂化材料。石墨烯使用SOCl2活化，并与PANT反应，形成紧密连接石墨烯和PANI的酰胺基团。用扫描电子显微镜、透射电子显微镜、红外光谱、拉曼光谱、X射线光电子能谱和量子化学分析等手段对杂化产物中酰胺基团的存在及其锚定作用进行了证实和表征。电化学测试表明，在电流密度为579.8.3和1Ag(-1)时，GP混合电极的比容量分别为579.8和361.9 Fg(-1)。这些值表明了与范德华力相互作用的材料相比的优越性。在高电流密度下的长期充放电测试表明，GP混合电池保持了96%的初始容量，表现出良好的电化学稳定性。电化学性能的改善表明，GP杂化材料在高性能超级电容器中具有良好的应用前景。
Polyaniline (PANT) nanofiber is grafted onto graphene to obtain a novel graphene-polyaniline (GP) hybrid. Graphene is activated using SOCl2 and reacts with PANT to form an amide group that intimately connects graphene and PANI. The existence of the amide group and its anchoring effect in the GP hybrid are confirmed and characterized by SEM, TEM, FT-IR, Raman, XPS and quantum chemistry analyses. Electrochemical tests reveal that the GP hybrid has high capacitance performances of 579.8 and 361.9 F g(-1) at current densities of 0.3 and 1 A g(-1). These values indicate superiority to materials interacted by van der Waals force. Long-term charge/discharge tests at high current densities show that the GP hybrid preserves 96% of its initial capacitance, demonstrating good electrochemical stability. The improved electrochemical performance suggests promising application of the GP hybrid in high-performance supercapacitors.