음이온 교환막 수전해 적용을 위한 고균일 고내구 코발트 산화물 전극의 제조 및 공정 조건 최적화

• Published in: Biuletyn Uniejowski Vol. 56; no. 6; pp. 412 - 419
• Main Authors: 이호석(Hoseok Lee), 명신우(Shin-Woo Myeong), 박준영(Jun-young Park), 박언주(Eon-ju Park), 허성준(Sungjun Heo), 김남인(Nam-In Kim), 이재훈(Jae-hun Lee), 정재훈(Jaehoon Jeong), 정재엽(Jae-Yeop Jeong), 진송(Song Jin), 이주영(Jooyoung Lee), 이상호(Sang Ho Lee), 김치호(Chiho Kim), 최승목(Sung Mook Choi)
• Format: Journal Article
• Language: Korean
• Published: 한국표면공학회 2023
• Subjects: 기계공학; Oxygen evolution reaction; Cobalt Oxide; Anion exchange membrane water electrolysis; Hydrogen production; Highly uniform electrode
• ISSN: 1225-8024; 2299-8403; 2288-8403
• DOI: 10.5695/JSSE.2023.56.6.412

Anion exchange membrane electrolysis is considered a promising next-generation hydrogen production technology that can produce low-cost, clean hydrogen. However, anion exchange membrane electrolysis technology is in its early stages of development and requires intensive research on electrodes, which are a key component of the catalyst-system interface. In this study, we optimized the pressure conditions of the hot-pressing process to manufacture cobalt oxide electrodes for the development of a high uniformity and high adhesion electrode production process for the oxygen evolution reaction. As the pressure increased, the reduction of pores within the electrode and increased densification of catalytic particles led to the formation of a uniform electrode surface. The cobalt oxide electrode optimized for pressure conditions exhibited improved catalytic activity and durability. The optimized electrode was used as the anode in an AEMWE single cell, exhibiting a current density of 1.53 A cm-2 at a cell voltage of 1.85 V. In a durability test conducted for 100 h at a constant current density of 500 mA cm-2, it demonstrated excellent durability with a low degradation rate of 15.9 mV kh-1, maintaining 99% of its initial performance.