Intergranular passivation of the TiC coating for enhancing corrosion resistance and surface conductivity in stainless-steel bipolar plates

doi:10.1007/s10853-020-05733-w

	Intergranular passivation of the TiC coating for enhancing corrosion resistance and surface conductivity in stainless-steel bipolar plates
	Li, Jingling 1,2,3,4; Xu, Zeling 1,2,3,4; Li, Yujian 3,4; Ma, Xinzhou 1,2; Mo, Jiamei 3,4; Weng, Lingyan 1,2; Liu, Cuiyin 1,2
刊名	JOURNAL OF MATERIALS SCIENCE
	2021-01-03
页码	15
ISSN号	0022-2461
DOI	10.1007/s10853-020-05733-w
通讯作者	Li, Jingling(lijl@fosu.edu.cn) ; Liu, Cuiyin(liu_cuiyin@163.com)
英文摘要	Stainless-steel bipolar plates (BPPs) are of great significance in low-cost, easily processable, lightweight proton exchange membrane fuel cells (PEMFCs) despite the challenge presented by corrosion in protective coatings. Localized corrosion along the grain boundaries in a crystal film is common, but few preventive measures have been developed so far. Thus, we propose a novel strategy using a tantalum (Ta) and carbon (C) co-modification to improve the chemical stability of titanium carbide (TiC)-based coatings (Cr/Ta/TiC/C). During the film growth, the subjacent Ta atoms were thermally diffused throughout the columnar structure of TiC and reacted with the C layer. The reaction product, i.e., TaC, acted as a chemical passivator to the grain boundary. Combined with the C capping layer, these functional layers synergistically suppressed any localized corrosion. Therefore, corrosion current densities within the United States Department of Energy's technical recommendations were achieved in both potentiostatic and potentiodynamic polarization. Meanwhile, by controlling the Ta metal dispersion, the interfacial contact resistance between the multilayer structure and the carbon paper can be reduced to 7.1 m omega center dot cm(-2) at a compaction force of 140 N center dot cm(-2). The substantial improvement in the corrosion resistance and conductivity of BPP places our work among the most efficient anticorrosion systems in PEMFC applications reported so far.
资助项目	National Natural Science Foundation of China[51902054] ; National Natural Science Foundation of China[51702051] ; Natural Science Foundation of Guangdong province[2017A030313307]
WOS关键词	FUEL-CELL ; MECHANICAL-PROPERTIES ; 316L ; BEHAVIOR ; FILM ; 304-STAINLESS-STEEL ; ENVIRONMENT ; PROTECTION ; DIFFUSION ; GRAPHENE
WOS研究方向	Materials Science
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000604580400015
资助机构	National Natural Science Foundation of China ; Natural Science Foundation of Guangdong province
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/32498]
专题	中国科学院广州能源研究所
通讯作者	Li, Jingling; Liu, Cuiyin
作者单位	1.Foshan Univ, Sch Mat Sci & Hydrogen Energy, Foshan 528000, Peoples R China 2.Guangdong Key Lab Hydrogen Energy Technol, Foshan 528000, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 4.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Li, Jingling,Xu, Zeling,Li, Yujian,et al. Intergranular passivation of the TiC coating for enhancing corrosion resistance and surface conductivity in stainless-steel bipolar plates[J]. JOURNAL OF MATERIALS SCIENCE,2021:15.
APA	Li, Jingling.,Xu, Zeling.,Li, Yujian.,Ma, Xinzhou.,Mo, Jiamei.,...&Liu, Cuiyin.(2021).Intergranular passivation of the TiC coating for enhancing corrosion resistance and surface conductivity in stainless-steel bipolar plates.JOURNAL OF MATERIALS SCIENCE,15.
MLA	Li, Jingling,et al."Intergranular passivation of the TiC coating for enhancing corrosion resistance and surface conductivity in stainless-steel bipolar plates".JOURNAL OF MATERIALS SCIENCE (2021):15.