Li, Hao Xin, Yang Komatsu, Keiji Guo, Peng Ma, Guanshui Ke, Peiling Lee, Kwang-Ryeol Saito, Hidetoshi Wang, Aiying 2024-01-19T12:31:31Z 2024-01-19T12:31:31Z 2022-05-04 2022-03 0360-3199 https://pubs.kist.re.kr/handle/201004/115531 In proton exchange-membrane fuel cells, the compactness and composition of amorphous carbon (a-C) films directly affect the interface-induced degradation of a-C-coated metallic bipolar plates, but their roles and synergistic effects are ambiguous. In this study, by changing the working pressure, the compactness and composition of a-C are adjusted, and the relationship among the plasma state, microstructure, and performance of coated 316L stainless steel are studied. Results show that, at 2 mTorr, a high ionization degree of the plasma causes high compactness (highest density 2.52 g/cm(3)) and large sp(2) cluster size in a-C films, resulting in their best performance. At 11 mTorr, the low ionization degree causes their loose structure and large sp2 cluster size. The possible galvanic coupling effect can result in serious interface damage and the highest Fe ions concentration of 13.05 ppm after a potentiostatic test. Thus, high compactness and large sp(2) cluster sizes should be obtained simultaneously to improve their performance.& nbsp;(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. English Pergamon Press Ltd. Controlling the compactness and sp2 clusters to reduce interfacial damage of amorphous carbon/316L bipolar plates in PEMFCs Article 10.1016/j.ijhydene.2022.01.173 1 International Journal of Hydrogen Energy, v.47, no.22, pp.11622 - 11632 International Journal of Hydrogen Energy 47 22 11622 11632 N scie scopus 000776747000017 2-s2.0-85124596092 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article A-C FILMS STAINLESS-STEEL ELECTRICAL-RESISTANCE MECHANICAL-PROPERTIES CORROSION CHROMIUM COATINGS DEGRADATION PERFORMANCE REFLECTION PEMFC Amorphous carbon film Bipolar plates Compactness and composition Plasma states