Y-doped BaZrO₃ 을 이용한 저온형 박막 연료전지 연구

국문 초록 (Abstract)

본 연구에서는 저온형 연료전지와 고온형 연료전지의 작동 및 구성 요소 측면 단점들을 보완하기 위해 중온 영역에서 작동하는 박막 연료전지를 제작하였다. 박막 연료전지는 이트륨이 도핑된 바륨 지 르코네이트(BYZ) 전해질과 백금 수소극/공기극으로 이루어져 있으며, 성능은 350℃에서 측정하였다. 350nm 의 두께를 가지는 백금 수소극은 다공성 기판 위에 스퍼터링 기법을 이용하여 증착하였다. BYZ 전해질은 펄스레이저 기법을 이용하여 1μm 증착하였고, 상부에 스퍼터링 기법을 이용하여 200nm 의 두께를 가지는 백금 공기극을 증착하였다. 개회로 전압은 약 0.81V 이었고, 최대 출력 성능은 11.9mW/cm² 이었다.

다국어 초록 (Multilingual Abstract)

In this study, we fabricate and investigate low-temperature solid oxide fuel cells with a ceramic substrate/porous metal/ceramic/ porous metal structure. To realize low-temperature operation in solid oxide fuel cells, the membrane should be fabricated to have a thickness of the order of a few hundreds nanometers to minimize IR loss. Yttrium-doped barium zirconate (BYZ), a proton conductor, was used as the electrolyte. We deposited a 350-nm-thick Pt (anode) layer on a porous substrate by sputter deposition. We also deposited a 1-μm-thick BYZ layer on the Pt anode using pulsed laser deposition (PLD). Finally, we deposited a 200-nm-thick Pt (cathode) layer on the BYZ electrolyte by sputter deposition. The open circuit voltage (OCV) is 0.806 V, and the maximum power density is 11.9 mW/cm² at 350 ℃. Even though a fully dense electrolyte is deposited via PLD, a cross-sectional transmission electron microscopy(TEM) image reveals many voids and defects.

목차 (Table of Contents)

• 초록
• Abstract
• 1. 서론
• 2. 실험 방법
• 3. 실험 결과
• 4. 결론
• 후기
• 참고문헌

참고문헌 (Reference)

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