Extremely facile synthesis of manganese dioxide-polyaniline nano-reticulation with enhanced electrochemical properties

摘要

MnO2/polyaniline composite is a promising candidate for supercapacitor electrode material. However very few research has researched nano-reticulation-structured MnO2 and polyaniline composites for supercapacitor electrode materials. Former research on MnO2 and polyaniline composites shown very common electrochemical properties. In this manuscript, an extremely facile, low-cost and high-yielding preparation of MnO2-polyaniline (MP) nano-reticulation composites with enhanced electrochemical properties was developed for the first time. For MP composite, the specific capacitance based on MnO2 is 425 F g(-1) at 0.1 A g(-1). The MP composite also exhibits excellent cycle stability, and the cycle retention keeps 95% after 10000 cycles. The outstanding performance is primarily attributed to improved electrical conductivity (compared to pure MnO2) and homogenous presence of MnO2 in the porous nanoreticulation, facilitating the fast transport of the electrolyte ions and the maximum utilization of MnO2. For MP composite, the maximum power density is 14.3 kW kg(-1) (energy density is 62.4 Wh kg(-1)). Hence, the MP composites prepared by facile solution reaction of KMnO4 and aniline may have a promising future in applications where durable, high energy and power density are requested simultaneously. (C) 2016 Elsevier B.V. All rights reserved.