The Research Of Polyaniline Mesoporous Composite Materials

Nowadays, with the development of science and technology, the popularity of computer, mobile communications equipment, and other electronic equipment are crying out for a high-performance energy storage device. As commonly used for maintaining power, even though the electrostatic capacitors have high power density, nevertheless, its energy storage is low. The batteries are obviously insufficient in service life. Therefore, super-capacitors, as a high-performance energy storage device, have been attracting significant attentions lately due to their wide range of applications in hybrid electric vehicles, information technology, aerospace, etc.Electrode materials are the key factor of super-capacitor's capacitance performance. Polyaniline has always been the hot spot of the researchers all over the world due to the good environmental stability, high theoretical capacity and high power density, etc. However, the small specific area and poor machinability limit its practical application. As a result, compositing with other materials is the common method to increase the specific surface. In this article, we not only get large specific surface area of polyaniline/silica composite, but also find another way to increase the electrochemical of polyaniline/silica composite (introducing the reducing electrolyte) and conducts a deep research. The main contents are as follows:(1) The SBA-15 which has short channel and perfectly organized is selected as template. A novel high specific capacitance mesoporous polyaniline (PANI)/silica platelet nanocomposite electrode material for supercapacitors was prepared by an impregnation polymerization. The initiator was embedded firstly in the mesoporous silica pores and channels and then initiated the polymerization of aniline (AN).(2) We synthesized high specific surface area mesoporous MnO2, which is applied to catalyze aniline and composite with PANI. KI was innovatively introduced to the electrolyte to increase the electrochemical performance. As far as we know, there are no other researchers using KI-H2SO4 solution as electrolyte for PANI/MnO2 composites. We also explored the specific capacitance under the 0.05,0.1,0.2,0.5, and 1 mol-L*1 KI solution. We not only obtained high specific capacitance through KI-H2SO4 electrolyte, but also found the most effective concentration of KI to function.