Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Study on a Separator for the All-vanadium Redox Flow Battery

바나듐 레독스-흐름 전지용 격막에 관한 연구

  • Lee, Sang-Ho (Div. Energy Efficiency & Materials Convergence Research, KIER) ;
  • Kim, Joeng-Geun (Div. Energy Efficiency & Materials Convergence Research, KIER) ;
  • Choi, Sang-Il (Div. Energy Efficiency & Materials Convergence Research, KIER) ;
  • Hwang, Gab-Jin (Div. Energy Efficiency & Materials Convergence Research, KIER) ;
  • Jin, Chang-Soo (Div. Energy Efficiency & Materials Convergence Research, KIER)
  • 이상호 (한국에너지기술연구원 효율소재융합연구본부) ;
  • 김정근 (한국에너지기술연구원 효율소재융합연구본부) ;
  • 최상일 (한국에너지기술연구원 효율소재융합연구본부) ;
  • 황갑진 (한국에너지기술연구원 효율소재융합연구본부) ;
  • 진창수 (한국에너지기술연구원 효율소재융합연구본부)
  • Published : 2009.06.30
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Abstract

The cation exchange membrane using the block co-polymer of polysulfone and polyphenylenesulfidesulfone was prepared for a separator of all-vanadium redox flow battery. The membrane property of the prepared cation exchange membrane was measured. The thermal stability of the prepared cation exchange analyzed by TG showed a more stable than that of Nafion117. The lowest measured membrane resistance, equilibrated in 1mol/L $H_2SO_4$ aqueous solution, $0.96{\cdot}cm^2$ at 3 cc of CSA (chlorosulfuricacid) which was introduction agent of ion exchange group. Electrochemical property of all-vanadium redox flow battery using the prepared cation exchange membrane was measured. Electromotive force in 100% of state of charge was 1.4 V which was that of all-vanadium redox flow battery, and cell resistance in charge and discharge at each state of charge had a low value compared with that of all-vanadium redox flow battery using Nafion117.

바나듐 레독스-흐름 전지용 격막으로 사용하기 위해 폴리설폰(Psf)에 폴리페닐렌설파이드설폰(PPSS)을 블록 공중합 시킨 폴리머를 사용하여 양이온교환막을 제작하여, 막 특성을 평가하였다. 제작한 양이온교환막은 Nafion117보다 열적 안정성이 뛰어나다는 것을 TG분석을 통해 알 수 있었고, 1몰 황산용액에서의 막 저항은 3 cc의 CSA를 도입하였을 때 $0.96{\Omeg}{\cdot}cm^2$로 제일 작은 저항 값을 나타냈다. 제작한 양이온교환막의 바나듐 레독스-흐름 전지에서의 전기화학적 특성에 대해 평가하였다. 제작한 양이온교환막을 사용한 바나듐 레독스-흐름 전지의 100% 충전상태에서의 기전력은 바나듐 레독스-흐름 전지의 기전력 값인 1.4V를 나타냈으며, 각 충전상태에서의 충 방전 셀 저항은 Nafion117을 사용한 전지의 값보다 작은 값을 나타냈다.

Keywords

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