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알칼리연료전지용 음이온교환전해질막의 연구 동향 및 전망
배병찬(Byungchan BAE),김은영(Eunyoung KIM),이소정(Sojeong LEE),이혜진(Hyejin LEE) 한국신재생에너지학회 2015 신재생에너지 Vol.11 No.4
Recently, alkaline membrane fuel cells (AMFCs) have received a lot of attention as an alternative to proton exchange membrane fuel cells (PEMFCs). AMFCs have a number of advantageous characteristics, including rapid oxygen reduction reaction, which can reduce the amount of platinum catalyst loading. When compared with aqueous KOH-electrolyte alkaline fuel cells, AMFCs do not suffer from the precipitation of potassium carbonate, and may also be operated under high pressure. However, the lack of high performance anion exchange membranes has restricted the commercialization of the AMFC system. Here we review recent research trends in anion exchange membranes and discuss the future prospects of AMFCs.
연료전지용 탄화수소 전해질 막의 산화안정성 향상을 위한 유기물 복합막의 제조 및 특성 분석
박샛별,이혜진,배병찬,Park, Satbyul,Lee, Hyejin,Bae, Byungchan 한국전기화학회 2016 한국전기화학회지 Vol.19 No.2
양이온 교환막 연료전지 운전 중에 발생하는 하이드록시 라디칼에 의한 전해질 막의 산화분해를 효과적으로 방지하기 위해 유기물 라디칼냐??쳐를 도입하였다. 술폰화 폴리아릴렌에테르술폰 고분자를 이용하여 폴리페놀 화합물의 일종인 루틴을 도입하여 복합막을 제조하였고, 제조된 고분자 전해질 복합막은 함수율 및 이온전도도의 측정을 통하여 루틴이 전해질 막의 물리화학적 성질에 미치는 영향에 대해서 조사하였다. 실제 연료전지 운전과 유사한 조건을 구현할 수 있는 과산화수소 폭로 가속화 평가장치를 이용하여 전해질 복합막의 산화안정성을 평가하였다. 루틴을 함유한 고분자 전해질 복합막은 이온전도도가 유지되면서 산화안정성이 향상된 결과를 보여주었다. In order to mitigate oxidative degradation of polymer membrane during fuel cell operation, an organic radical quencher was introduced. Rutin was selected as a radical quencher and mixed with sulfonated poly(arylene ether sulfone) to prepare composite membrane. Physicochemical properties of the composite membranes such as water uptake and proton conductivity were characterized. Hydrogen peroxide exposure experiment, which can mimic accelerated oxidative stability test during fuel cell operation, was adopted to evaluate the oxidative stability of the membranes. The composite membranes containing Rutin showed similar proton conductivity and enhanced oxidative stability compared to pristine ones.
음이온 교환막의 정확한 OH<sup>-</sup>전도도 및 CO<sub>2</sub> 피독 효과 분석을 위한 전기화학적 측정법
김수연,권후근,이혜진,정남기,배병찬,신동원,Kim, Suyeon,Kwon, Hugeun,Lee, Hyejin,Jung, Namgee,Bae, Byungchan,Shin, Dongwon 한국전기화학회 2022 한국전기화학회지 Vol.25 No.2
The anion exchange membrane used in alkaline membrane fuel cells transports hydroxide ions, and ion conductivity affects fuel cell performance. Thus, the measurement of absolute hydroxide ion conductivity is essential. However, it is challenging to accurately measure hydroxide ion conductivity since hydroxide ions are easily poisoned in the form of bicarbonate by carbon dioxide in the atmosphere. In this study, we applied electrochemical ion exchange treatment to measure the absolute hydroxide ion conductivity of the anion exchange membrane. In addition, we investigated the effect of carbon dioxide poisoning of hydroxide ions on electrochemical performance by measuring bicarbonate conductivity. Commercial anion exchange membranes (FAA-3-50 and Orion TM1) and polyphenylene-based block copolymer (QPP-6F) were used.