Nano-Cr2N dominated films with high conductivity and strong corrosion resistance for Ti bipolar plates

Li Chen; Ruixuan Liu; Bin Zhang; Jianxiang Lv; Junyan Zhang

Materials & Design (Dec 2022)

Nano-Cr2N dominated films with high conductivity and strong corrosion resistance for Ti bipolar plates

Li Chen,
Ruixuan Liu,
Bin Zhang,
Jianxiang Lv,
Junyan Zhang

Affiliations

Li Chen: School of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, China
Ruixuan Liu: School of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, China; Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
Bin Zhang: Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; Corresponding author at: Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
Jianxiang Lv: Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Junyan Zhang: Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Journal volume & issue: Vol. 224
p. 111305

Abstract

Read online

Films for bipolar plates deposited from PVD are always restricted by narrow parameters’ widow, which restrict the robust quality of high conductivity and anticorrosion due to the fluctuation of deposition plasma naturally. In this study, CrN films with high conductivity and strong corrosion resistance was deposited on Ti plates by high power impulse magnetron sputtering in wider Ar/N2 ratios. The results show that the CrN film prepared by this method effectively inhibits the columnar structure and forms a dense structure of amorphous wrapped nano Cr2N clusters, providing good protection for Ti plate. Meanwhile, First-principal calculations shown Cr2N has stronger metallicity than CrN, resulting in lower ICR. This work has opened up a new way for the large-scale preparation of metal bipolar plate films.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

About the journal

Abstract

Keywords