Synthesis and Characterization of PEDOT: PSS-PAs with Good Electrical Conductivity for Supercapacitor
Long Shen
Department of Advanced Materials, Hannam University, Daejeon-305-811, Republic of Korea.
Yoon Kim
Department of Advanced Materials, Hannam University, Daejeon-305-811, Republic of Korea.
Dong-Ju Lee
Department of Advanced Material Engineering, Chungbuk National University, Chungju 28644, Republic of Korea.
Tae-Dong Kim *
Department of Advanced Materials, Hannam University, Daejeon-305-811, Republic of Korea.
*Author to whom correspondence should be addressed.
Abstract
Recently, researches on molecular engineering of PEDOT:PSS is being actively conducted to improve the electrical conductivity and device performance. In this paper, we prepared and characterized a series of PSS substituted with alkyl sulfonate (PSS-co-PA3, PSS-co-PA5, PSS-co-PA10, and PSS-co-PA30) proceeding to prepare PEDOT:PSS/graphene oxide (GO) aerogels with different amounts of alkyl sulfonate functional groups that could be applied to supercapacitor electrodes. The introduction of alkyl sulfonate groups in PSS can enhance its solubility due to the flexible alkyl sulfonate groups. The cycle stability of supercapacitors using PEDOT:PSS-co-PA30/rGO electrode (88%) was improved compared to that of Clevios 4083/rGO electrode (53%) after 5000 cycles.
Keywords: Conducting polymers, PEDOT:PSS-PAs, graphene oxide, supercapacitor, electrical conductivity