Molybdenum carbide coated 316L stainless steel for bipolar plates of proton exchange membrane fuel cells

Wang, Lun1; Tao, Youkun2,3; Zhang, Zhen1; Wang, Yajun3; Feng, Qi1; Wang, Haijiang3,4; Li, Hui1,4

2019-02-22

10.1016/j.ijhydene.2018.12.184

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   影响因子和分区

0360-3199

1879-3487

Superior corrosion resistance and high electrical conductivity are crucial to the metallic bipolar plates towards a wider application in proton exchange membrane fuel cells. In this work, molybdenum carbide coatings are deposited in different thicknesses onto the surface of 316 L stainless steel by magnetron sputtering, and their feasibility as bipolar plates is investigated. The microstructure characterization confirms a homogenous, compact and defectless surface for the coatings. The anti-corrosion performance improves with the increase of the coating thickness by careful analysis of the potentiodynamic and potentiostatic data. With the adoption of a thin chromium transition layer and coating of a similar to 1052 nm thick molybdenum carbide, an excellent corrosion current density of 0.23 mu A cm(-2) is achieved, being approximately 3 orders of magnitude lower than that of the bare stainless steel. The coated samples also show a low interfacial contact resistance down to 6.5 m Omega cm(2) in contrast to 60 m Omega cm(2) for the uncoated ones. Additionally, the hydrophobic property of the coatings' surface is beneficial for the removal of liquid water during fuel cell operation. The results suggest that the molybdenum carbide coated stainless steel is a promising candidate for the bipolar plates. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Proton exchange membrane fuel cell Bipolar plate Molybdenum carbide Stainless steel Corrosion current density Interfacial contact resistance

SCI ; EI

英语

第一 ; 通讯

Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06N500]

Chemistry ; Electrochemistry ; Energy & Fuels

Chemistry, Physical ; Electrochemistry ; Energy & Fuels

WOS:000459837700037

PERGAMON-ELSEVIER SCIENCE LTD

20190406402232

Austenitic stainless steel ; Carbides ; Contact resistance ; Corrosion resistance ; Corrosion resistant coatings ; Molybdenum compounds ; Stainless steel ; Steel corrosion ; Stripping (removal) ; Thickness measurement

Metals Corrosion:539.1 ; Steel:545.3 ; Electricity: Basic Concepts and Phenomena:701.1 ; Fuel Cells:702.2 ; Inorganic Compounds:804.2 ; Mechanical Variables Measurements:943.2

ENGINEERING

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, SUSTech Acad Adv Interdisciplinary Studies, Shenzhen, Guangdong, Peoples R China
3.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen, Guangdong, Peoples R China
4.Shenzhen Southerntech Fuel Cell Corp Ltd, Shenzhen, Guangdong, Peoples R China

Wang, Lun,Tao, Youkun,Zhang, Zhen,et al. Molybdenum carbide coated 316L stainless steel for bipolar plates of proton exchange membrane fuel cells[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2019,44(10):4940-4950.

Wang, Lun.,Tao, Youkun.,Zhang, Zhen.,Wang, Yajun.,Feng, Qi.,...&Li, Hui.(2019).Molybdenum carbide coated 316L stainless steel for bipolar plates of proton exchange membrane fuel cells.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,44(10),4940-4950.

Wang, Lun,et al."Molybdenum carbide coated 316L stainless steel for bipolar plates of proton exchange membrane fuel cells".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 44.10(2019):4940-4950.