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Received August 9, 2021
Accepted October 20, 2021
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PEMFC 고분자막의 어닐링 온도가 내구성에 미치는 영향
Effect of Annealing Temperature on the Durability of PEMFC Polymer Membrane
순천대학교 연료전지 평가센터, 57922 전남 순천시 매곡동 315 1순천대학교 화학공학과, 57922 전남 순천시 매곡동 315
Fuel Cell Test and Evaluation Center, Sunchon National University, 315 Maegok-dong, Suncheon, Jeonnam, 57922, Korea 1Department of Chemical Engineering, Sunchon National University, 315 Maegok-dong, Suncheon, Jeonnam, 57922, Korea
parkkp@sunchon.ac.kr
Korean Chemical Engineering Research, February 2022, 60(1), 7-11(5), 10.9713/kcer.2022.60.1.7 Epub 24 January 2022
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Abstract
고분자전해질 연료전지의(PEMFC)의 제막 과정에서 성능 및 내구성을 위해 건조와 어닐링의 열처리 과정이 필요하다. 본 연구에서는 고분자막 내구성 향상을 위한 최적의 어닐링 온도에 대해 연구하였다. 125~175 °C 온도 범위에서 어닐링하였고, 각 어닐링 온도에서 내구성의 기초 자료로 열 안정성 및 수소투과도를 측정하였다. 펜톤 반응과 OCV holding에 의해 전기화학적 내구성을 분석했다. 165 °C 어닐링 온도가 열 안정성과 수소투과도 면에서 최적의 온도였다. 펜톤 반응에서 165 °C에서 어닐링한 막의 불소유출속도가 제일 낮고, OCV holding 실험에서도 165 °C에서 어닐링한 막의 수명이 제일 길어, 165 °C 가 고분자막의 내구성을 위한 최적의 온도임을 확인했다.
In the membrane forming process of a proton exchange membrane fuel cell (PEMFC), drying and annealing heat treatment processes are required for performance and durability. In this study, the optimal annealing temperature for improving the durability of the polymer membrane was studied. It was annealed in the temperature range of 125~175 °C, and thermal stability and hydrogen permeability were measured as basic data of durability at each annealing temperature. The electrochemical durability was analyzed by Fenton reaction and open circuit voltage (OCV) holding. The annealing temperature of 165 °C was the optimal temperature in terms of thermal stability and hydrogen permeability. In the Fenton reaction, the fluorine emission rate of the membrane annealed at 165 °C was the lowest, and the lifespan of the membrane annealed at 165 °C was the longest in the OCV holding experiment, confirming that 165 °C was the optimal temperature for the durability of the polymer membrane.
Keywords
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