KOREASCHOLAR

Proton Exchange Membrane Fuel Cells (PEMFCs) are emerging as reliable energy conversion devices for stationary power generation due to their high efficiency and environmental benefits. However, achieving long-term durability remains a critical challenge for commercialization. This study investigates the performance and degradation behavior of a PEMFC stack under 360 hours of constant current operation at approximately 0.22-0.23 A/cm², delivering a stack output of 1.5 kW. Electrochemical Impedance Spectroscopy (EIS) was employed to diagnose cell degradation, revealing increases in ohmic and charge transfer resistances over time. The results highlight the importance of uniform cell performance within the stack to prevent output limitations. Furthermore, we propose a framework for Remaining Useful Life (RUL) prediction to enhance system reliability. Future work will focus on applying these diagnostic techniques under varied operating conditions and integrating machine learning for advanced predictive models, aiming to support the development of stable, long-life PEMFC systems for stationary energy applications.

Abstract
1. 서 론
2. 이론 및 배경
    2.1 건물용 PEMFC 운전 특성과 열화매커니즘
    2.2 EIS를 활용한 연료전지 셀 진단 원리
3. 실험방법
    3.1. 실험대상 및 시스템 구성
    3.2. 장시간 정전류 운전상태의 EIS 측정
    3.3. 추가 성능평가 및 분석 방법
4. 결과 및 논의
    4.1. 스택 성능 변화 및 열화 셀 식별
    4.2. 열화 셀의 EIS 임피던스 분석
5. 결 론
References

• 김영권(Group Reader, Energy Industry Growth Group, Jeonbuk Technopark) | Y. K. Kim Corresponding author