화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.46, No.2, 179-185, March, 2022
DOI10.7317/pk.2022.46.2.179  Export Citation
가돌리늄이 도핑된 세륨 옥사이드 나노 입자를 포함한 고분자 전해질 연료전지용 술폰화 폴리(이서 이서 케톤) 복합막 개발
Development of Composite Membranes of Sulfonated Poly(ether ether ketone) and Gadolinium-doped Ceria Nanoparticles for Polymer Electrolyte Membrane Fuel Cells
윤가애, 김성구1, 배인성†
  • 한남대학교 신소재공학과
  • 1한남대학교 화학공학과
Gaae Yun, Seong Ku Kim1, and Insung Bae†
  • Department of Advanced Materials, Hannam University, 1646 Yuseong-daero, Yuseong-gu, Daejeon 34054, Korea
  • 1Department of Chemical Engineering, Hannam University, 1646 Yuseong-daero, Yuseong-gu, Daejeon 34054, Korea
E-mail:
초록
탄화수소계 전해질 고분자의 취약한 화학적 안정성과 습도조건에 따른 물리적 안정성을 확보하기 위하여, gadolinium(Gd)이 도핑된 세륨 옥사이드(cerium oxide, ceria) 나노 입자를 합성하여 탄화수소계 전해질 고분자 sulfonated poly(ether ether ketone)(SPEEK)에 도입한 복합막을 제조하였다. Gd-doped ceria(GDC)는 기존의 ceria와 비교하여 증가된 산소 공공을 나타내며, 이를 통한 라디칼 억제 기능이 더욱 활성화된다. SPEEK/GDC 복합막은 증가된 bound water로 인해 저가습 수소 이온 전도도가 향상되었으며, 억제된 습윤 팽창률과 증가된 인장강도로 인해 물리적 안정성이 증가되었다. 뿐만 아니라, Fenton’s 평가 결과 향상된 화학적 안정성을 나타내는 것을 확인하였다.
We introduce gadolinium (Gd)-doped cerium oxide (GDC) nanoparticles with hydrocarbon-based proton exchange membrane of sulfonated (ether ether ketone) (SPEEK) for realizing enhanced physical and chemical membrane stabilities. The oxygen vacancy of GDC increases with doping of Gd into ceria, enhancing the chemical stability from the radical degradation. The SPEEK/GDC composite membrane exhibits an increased proton conductivity at low relative humidity conditions due to its higher affinity with water molecules. Moreover, the GDC nanoparticles in the SPEEK matrix enhance not only the mechanical stability with preventing membrane swelling but also the radical resistive chemical stability of the composite membrane.
Keywords:polymer electrolyte membrane;sulfonated (ether ether ketone);gadolinium;cerium oxide;composite membrane
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