电沉积法制备PANI/MnO 2/石墨烯复合材料及其电化学性能研究

摘要

PANI/MnO2/graphene ternary composites with layer-by-layer 3D architecture were synthesized by facile one-step pulse electrodeposition. The structure and composition of the composites were studied through XRD and FT-IR. And the morphologies were characterized by SEM and TEM. Moreover, electrochemical performance of the composites were studied by galvanostatic charge-discharge and cyclic voltammetry tests. The results indicate that the specific capacitance could reach 1 120 F·g–1 at a current density of 0.5 A·g–1, and the stability is 99% after 1 000 cycles. The excellent performance is due to the graphene substrates, on which rod-like PANI with MnO2 nano-particles growing on distributes, forming a special hierarchical structure.%采用简便的脉冲电沉积方法一步合成了呈现层-层分布的三维立体结构的PANI/MnO 2/石墨烯三元复合材料，利用XRD和FT-IR等研究了复合物的结构和组成，SEM和TEM表征了复合物的形貌。同时，通过恒流充放电和循环伏安测试研究了该复合物的电化学性能。结果表明，0.5 A·g–1电流密度下的比容量可达1120 F·g–1，且1000次循环的稳定性高达99%。出色的超电容性能主要源于石墨烯作为基体，其上均匀分布棒状结构的PANI，MnO2纳米粒子均匀分布于PANI纳米棒上，形成了一种分级的特殊结构。