상세정보
학술지
Vapor-Mediated Infiltration of Nanocatalysts for Low-Temperature Solid Oxide Fuel Cells Using Electrosprayed Dendrites
- 저자
- 신성수, 김정훈, 정혜성, 박미영, 윤경중, 손지원, 최만수, 김형철
- 발행일
- 202112
- 출처
- Nano Letters, v.21 no.24, pp.10186-10192
- ISSN
- 1530-6984
- 출판사
- American Chemical Society (ACS)
- 협약과제
- 21JB4600, 건물 에너지 효율 향상용 에너지하베스팅 기술을 적용한 초소형 센서 통합 모듈 원천기술 개발, 문승언
- 초록
- Electrode architecturing for fast electrochemical reaction is essential for achieving high-performance of low-temperature solid oxide fuel cells (LT-SOFCs). However, the conventional droplet infiltration technique still has limitations in terms of the applicability and scalability of nanocatalyst implementation. Here, we develop a novel two-step precursor infiltration process and fabricate high-performance LT-SOFCs with homogeneous and robust nanocatalysts. This novel infiltration process is designed based on the principle of a reversible sol?밽el transition where the gelated precursor dendrites are uniformly deposited onto the electrode via controlled nanoscale electrospraying process then resolubilized and infiltrated into the porous electrode structure through subsequent humidity control. Our infiltration technique reduces the cathodic polarization resistance by 18% compared to conventional processes, thereby achieving an enhanced peak power density of 0.976 W cm??2 at 650 °C. These results, which provide various degrees of freedom for forming nanocatalysts, exhibit an advancement in LT-SOFC technology.
- KSP 제안 키워드
- Cathodic polarization resistance, Degrees of freedom(DOF), High performance, Humidity control, LT-SOFCs, Low temperature(LT), Peak power density, Porous electrode structure, Solid oxide fuel cells(SOFCs), Two-Step, electrochemical reaction(ECR)