Cs<sup>+</sup> 치환에 따른 수전해용 공유가교 SPEEK/HPA 복합막의 안정화

지봉철; 하성인; 송민아; 정장훈; 문상봉; 강안수

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자료유형: 학술저널

저자정보: 지봉철 하성인 송민아 정장훈 문상봉 강안수

저널정보: 한국수소및신에너지학회 한국수소및신에너지학회논문집 한국수소 및 신에너지학회 논문집 제22권 제1호

발행연도: 2011.2

수록면: 1 - 12 (12page)

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To improve the mechanical properties, such as durabilities and antioxidative characteristics, the covalently cross-linked (CL-) SPEEK (sulfonated polyether ether ketone)/Cs-substituted HPA (heteropoly acid) organic-inorganic composite membranes (CL-SPEEK/Cs-HPAs), have been intensively investigated. The composite membrane were prepared by blending cesium-substituted HPAs (Cs-HPAs), including tungstophosphoric acid (TPA), molybdophosphoric acid (MoPA), and tungstosilicic acid (TSiA) with cross-linking agent content of 0.01 mL. And composite electrolytes composed of Cs-HPAs, prepared by immersion (imm.) and titration (titr.) methods to increase the stability of HPAs in water, were applied to polymer electrolyte membrane electrolysis (PEME). As a result, the proton conductivity of Cs-substituted composite membranes increased rapidly over 60℃ but mechanical properties, such as tensile strength, decreased in accordance with added Cs content. The bleeding-out of Cs-TPA membranes by titration method (50 vol.% Cs) decreased steadily to 2.15%. In the oxidative stability test by Fenton solution, the durability of membranes with Cs-HPA significantly increased. In case of CL-SPEEK/ Cs-TPA membrane, duration time increased more than 1200 hours. It is expected that even though CL-SPEEK/Cs-MoPA membrane shows the high proton conductivity, electrocatalytic activity and cell voltage of 1.80 V for water electrolysis, the CL-SPEEK/Cs-TPA (imm.) is more suitable as an alternative membrane in real system with the satisfactory proton conductivity, mechanical properties, anti-oxidative stability and cell voltage of 1.89 V.

#고분자 전해질막 수전해 #공유가교결합 #기계적 특성 #산화내구성 #술폰화 폴리에테르에테르케톤 #헤테로폴리산 침출 #Bleeding out of HPA #Covalently crosslinking #Cs이 치환된 헤테로폴리산 #Cs-HPA #Mechanical properties #Oxidative stability #PEME #SPEEK

참고문헌 (25)

참고문헌 신청

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황용구 / 2008 / 수전해용 SPEEK 전해질막의 제조시 HPA 첨가제의 영향

I. Y. Jang / 2008 / Covalently cross-linked sulfonated poly(ether ether ketone)/ tungstophosphoric acid composite membranes for water electrolysis application / J. Power Sources 181(1):127~134

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