Solution acidity and temperature induced anodic dissolution and degradation of through-plane electrical conductivity of Au/TiN coated metal bipolar plates used in PEMFC

Hong-Qiang Fan, Yuan-Min Wu, Shuo Su, Dong-Dong Shi, Xian-Zong Wang, Yashar Behnamian, Jie-Yu Zhang and Qian Li

Energy, 2022, vol. 254, issue PC

Abstract: A novel composite coating of gold/titanium nitride on stainless steel (Au/TiN/SS) was developed by introducing Au dots onto a TiN coating to improve the corrosion resistance and electrical conductivity of stainless steel bipolar plates for the polymer electrolyte membrane fuel cell (PEMFC). The effects of temperature and pH on conductivity and corrosion resistance of the Au/TiN/SS in a simulated PEMFC environment were investigated. The results showed that the interfacial contact resistance of TiN coating reduced from 5.48 mΩ cm2 to 1.72 mΩ cm2 after introducing the Au dots, indicating that Au dots can enhance the interfacial conductivity of the composite coating on stainless steel. The increases of solution temperature and acidity enhanced the dissolution of TiN as well as the delamination of Au dots from the composite coating, and the corrosion current density (icorr) of Au/TiN coating increased in high temperature and strong acidic environments. The thin layer of TiNxOy and TiO2 around the Au dots was preferentially dissolved to detach the Au from the composite coating, therefore induced the degradation of through-plane electrical conductivity of the Au/TiN coated metal bipolar plates.

Keywords: Polymer electrolyte membrane fuel cell; Metal bipolar plates; Au/TiN coating; Corrosion resistance; Interfacial contact resistance (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544222013561
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:254:y:2022:i:pc:s0360544222013561

DOI: 10.1016/j.energy.2022.124453

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().