Preparation of Solid Polymer Electrolytes of PSf-co-PPSS/Heterooolyacid [HPA] Composite Membrane for Hydrogen Production via Water Elecrolysis

PSf-co-PPSS/HPA를 이용한 수소제조 수전해용 고체 고분자 전해질 복합 막의 제조

  • Jung, Yun-Kyo (Dep. of Chemical Engineering, Myongji Univ.) ;
  • Lee, Hyuck-Jae (Dep. of Chemical Engineering, Myongji Univ.) ;
  • Jang, In-Young (Dep. of Chemical Engineering, Myongji Univ.) ;
  • Hwang, Gab-Jin (Hydrogen Energy Research Center, Korea Institute of Energy Research) ;
  • Bae, Ki-Kwang (Hydrogen Energy Research Center, Korea Institute of Energy Research) ;
  • Sim, Kyu-Sung (Hydrogen Energy Research Center, Korea Institute of Energy Research) ;
  • Kang, An-Soo (Dep. of Chemical Engineering, Myongji Univ.)
  • 정윤교 (명지대학교 화학공학과) ;
  • 이혁재 (명지대학교 화학공학과) ;
  • 장인영 (명지대학교 화학공학과) ;
  • 황갑진 (한국에너지기술연구원 수소에너지연구센터) ;
  • 배기광 (한국에너지기술연구원 수소에너지연구센터) ;
  • 심규성 (한국에너지기술연구원 수소에너지연구센터) ;
  • 강안수 (명지대학교 화학공학과)
  • Published : 2005.06.15

Abstract

Proton conducting solid polymer electrolyte (SPE) membranes have been used in many energy technological applications such as water electolysis, fuel cells, redox-flow battery, and other electrochemical devices. The availability of stable membranes with good electrochemical characteristics as proton conductivity at high temperatures above 80 $^{\circ}C$ and low cost are very important for its applications. However, the presently available perfluorinated ionomers are not applicable because of high manufacturing cost and high temperature use to the decrease in the proton conductivity and mechanical strength. In order to make up for the weak points, the block copolymer (BPSf) of polysulfone and poly (phenylene sulfide sulfone) were synthesized and sulfonated. The electrolyte membranes were prepared with phosphotungstic acid (HPA)/sulfonated BPSf via solution blending. This study would be desirable to investigate the interaction between the HPA and sulfonated polysulfone. The results showed that the characteristics of SPSf/HPA blend membrane was a better than Nafion at high temperature, 100 $^{\circ}C$. These membranes proved to have a high proton conductivity, $6.29{\times}10-2$ S/cm, a water content, 23.9%, and a ion exchange capacity, 1.97 meq./g dry membrane. Moreover, some of the membranes kept their high thermal and mechanical stability.

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