ISSN: 0304-128X ISSN: 2233-9558
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Publication history
Received September 1, 2023
Revised December 15, 2023
Accepted December 21, 2023
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고분자전해질 연료전지(PEMFC)에서 촉매 지지체 가속 열화 조건 변화의 영향

Effects of Changes in Accelerated Degradation Conditions for Catalyst Supports in Polymer Electrolyte Fuel Cell

순천대학교 1한국자동차연구원
Sunchon National University 1KATECH
Korean Chemical Engineering Research, February 2024, 62(1), 7-12(6), 10.9713/kcer.2024.62.1.7 Epub 1 February 2024
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고분자 전해질 연료전지(PEMFC) 내구성에 촉매 지지체 내구성이 미치는 영향이 크다. 촉매 지지체의 가속 내구 평가

는 높은 전압(1.0~1.5 V)에서 진행되어 촉매층의 촉매와 이오노머 바인더도 같이 열화되어 지지체 내구성 평가에 방해

가 된다. 내구성 평가대상인 지지체가 더 열화되는 조건을 찾고자 기존의 프로토콜 (DOE 프로토콜)을 개선하였다. 상

대습도를 35% 낮추고 전압변화 횟수를 감소시킨 프로토콜 (MDOE)을 개발하였다. 1.0 ↔ 1.5 V 전압변화 사이클 반

복 후에 촉매 비활성도 (MA)와 전기화학적 활성면적 (ECSA), 전기이중층 용량 (DLC), Pt 용해와 입자 성장 등을 분

석하였다. 비활성도 감소 40% 도달하는데 MDOE 프로토콜은 500 사이클 밖에 안되어 DOE방법보다 전압변화 횟수

를 감소시키면서 카본 지지체 열화를 DOE 프로토콜보다 50% 증가시킬 수 있었다.

The durability of the catalyst support has a significant effect on the durability of proton exchange membrane fuel cells (PEMFC). The accelerated durability evaluation of the catalyst support is performed at a high voltage (1.0 to 1.5 V), and the catalyst and ionomer binder in the catalyst layer are also deteriorated, hindering the evaluation of the durability of the support. The existing protocol (DOE protocol) was improved to find conditions in which the support, which is a durability evaluation target, deteriorates further. A protocol (MDOE) was developed in which the relative humidity was lowered by 35% and the number of voltage changes was reduced. After repeating the 1.0 ↔ 1.5 V voltage change cycle, the catalyst mass activitiy (MA), electrochemical active area (ECSA), electrical double layer capacity (DLC), Pt dissolution and particle growth were analyzed. Reaching 40% reduction in mass activity, the MDOE protocol took only 500 cycles, reducing the number of voltage changes compared to the DOE method and increasing the degradation of the carbon support by 50% compared to the DOE protocol.


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