Preparation of comducting polymer-manganese dioxide composite electrode and its application on supercapacitor

• Main Authors: Tsui-Fen Hsu, 徐翠芬
• Other Authors: Feng-Jiin Liu
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/19012263593455700268

碩士 === 國立聯合大學 === 化學工程學系碩士班 === 96 === Abstract In this study, conducting polymeric substrates were prepared by two different ways. The manganese dioxide particle were deposited in the conductive polymers by using electrochemical method. This conducting polymer - manganese dioxide composite electrode was successfully applied for supercapacitor. Because polymers has the porous structure, the deposition of metal oxide compound particle could be dispersed uniformly on the conducting polymers surface which enhances specific surface of the metal oxide compound, and the electric capacity also could be increased. This research included the following two parts: Part I. Poly(3,4-ethylenedioxythiophene)/poly(styrene sulfonic acid) / polyaniline / manganese dioxide composite electrode and its application on supercapacitor Poly(3,4 - ethylenedioxythiophene) / poly(styrene sulfonic acid) / polyaniline(PEDOT–PSS–PANI) was prepared by interfacial polymerization of ANI into PEDOT–PSS. Conductivity was enhanced by incorporating of PANI into PEDOT–PSS because of that the distance for electron shuttling along the conjugated polymeric chain was decreased. Composite electrodes were prepared by the electrochemical potentiostatic deposition of manganese dioxide (MnO2) in a PEDOT–PSS–PANI. From cyclic voltammogram results , the specific capacitance of PEDOT–PSS–PANI-MnO2 was much higher than that of PEDOT–PSS –PANI. Howere, the scanning electron microscopy (SEM) show that the preparation of composite electrodes does not have a three-dimensional matrix. This further confirmed that the deposition of the manganese dioxide to the PEDOT-PSS-PANI structure have obvious being of help to the capacitance promotion. Part II. Polyaniline/ poly(4-styrene sulfonic acid-co-maleic acid) / manganese dioxide composite electrode and its application on supercapacitor This work demonstrates a simple preparing method for composite electrode of polyaniline / poly(4-styrene sulfonic acid - co -maleic acid) / manganese oxide (PANI - PSSMA - MnO2) by “Electrochemical-doping- deposition”. Polyaniline(PANI) was prepared by using the electrochemical potentiostatic method. PANI with dedoping form was immersed in the PSSMA-MnSO4 solution , it was redoping PSSMA and MnO2 using an electrochemical cycle voltammetry in the PANI structure. The and retain the PANI electrochemical actively in the neutral plating solution and enhance the dispersion of MnO2 .