화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.86, 81-89, June, 2020
DOI10.1016/j.jiec.2020.02.013  Export Citation
Facile fabrication of polyaniline films with hierarchical porous networks for enhanced electrochemical activity
Ji-Hye Kim, Ju-Hee So1, Sung-Kon Kim2, Hyunsik Yoon, Jonghoon Choi3, and Hyung-Jun Koo†
  • Department of Chemical and Biomolecular Engineering, Seoul National University of Science and Technology, Seoul, 01811, Republic of Korea
  • 1Research Institute of Industrial Technology Convergence, Korea Institute of Industrial Technology, Ansan, 15588, Republic of Korea
  • 2School of Chemical Engineering, Jeonbuk National University, Jeonju, 54896, Republic of Korea
  • 3School of Integrative Engineering, Chung-Ang University, Seoul, Republic of Korea
E-mail:
This paper describes a facile method for fabricating polyaniline (PANI) films with well-defined threedimensional (3D) porous networks and improved electrochemical activity. The PANI hydrogel pastes with different compositions are directly cast into thin films by the doctor blade technique. After a dehydration step, the conductivity of the PANI drastically increases, while the porous structure with hierarchical macro- and meso-porosity is formed in the PANI film. The electrical conductivity tends to increase with the thickness of the porous PANI film until it fails to form a mechanically stable film not exhibiting cracking problems. We found that the amount of the initiator, the aniline monomer, and the crosslinker significantly affect not only the micro-morphology of PANI films, but also their electrical and electrochemical characteristics. Importantly, when the amounts of the crosslinker and the initiator increase, the polymer film forms with a dense internal morphology with smaller pores. Based on the engineered synthesis composition, we demonstrate a supercapacitor with porous PANI electrodes. Due to the hierarchical porous structure, large surface area and the improved conductivity, the resulting devices show excellent volumetric capacitances, which are comparable to or much higher than those previously reported.
Keywords:Polyaniline;Hierarchical porous networks;Hydrogel paste;Doctor-blade technique;Electrochemical capacitors
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