Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403


한국표면공학회지 (44권5호 226-231)

Surface Characteristic of Graphene Coated Stainless Steel for PEMFC Bipolar Plate

그래핀이 코팅된 스테인리스강의 고분자전해질 연료전지 분리판 적용을 위한 표면 특성

Lee, Su-Hyung;Kim, Jung-Soo;Kang, Nam-Hyun;Jo, Hyung-Ho;Nam, Dae-Guen;

한국생산기술연구원 정형가공시스템센터;부산대학교 공과대학 재료공학과;
Korea Institute of Industrial Technology, Net-Shape Manufacturing System Center;School of Materials Science and Engineering, Pusan National University;

DOI : 10.5695/JKISE.2011.44.5.226


Graphene was coated on STS 316L by electro spray coating method to improve its properties of corrosion resistance and contact resistance. Exfoliated graphite (graphene) was made of the graphite by chemical treatment. Graphene is distributed using dispersing agent, and STS 316L was coated with diffuse graphene solution by electro spray coating method. The structure of the exfoliated graphite was analyzed using XRD and the coating layer of surface was analyzed by using SEM. Analysis showed that multi-layered graphite structure was destroyed and it was transformed into fine layers graphene structure. And the result of SEM analysis on the surface and the cross section, graphene layer was uniformly formed with 3~5 ${mu}m$ thickness on the surface of substrate. Corrosion resistance test was applied in the corrosive solution which is similar to the PEM fuel cell stack inside. And interfacial contact resistance test was measured to simulate the internal operating conditions of PEM fuel cell stack. The results of measurements show that stainless steel coated with graphene was improved in corrosion resistance and surface contact resistance than stainless steel without graphene coating layer.


Graphene;PEMFC;Bipolar plate;Stainless steel;Electro spray coating;