LAUSR.org creates dashboard-style pages of related content for over 1.5 million academic articles. Sign Up to like articles & get recommendations!

Vertical‐Graphene‐Reinforced Titanium Alloy Bipolar Plates in Fuel Cells

Photo from wikipedia

The bipolar plate (BP) serves as one of the crucial components in proton exchange membrane fuel cells (PEMFCs). Among BP materials, metallic BPs are widely employed due to their outstanding… Click to show full abstract

The bipolar plate (BP) serves as one of the crucial components in proton exchange membrane fuel cells (PEMFCs). Among BP materials, metallic BPs are widely employed due to their outstanding comprehensive properties. However, the interfacial contact resistance (ICR) between BP and gas diffusion layer together with corrosion of metallic BP under acidic operating conditions degrades the performance and stability of PEMFCs. Herein, an approach is proposed for the surface reinforcement of titanium (Ti) alloy BPs, relying on a directly grown vertical graphene (VG) coating via the plasma‐enhanced chemical vapor deposition method. Compared with bare Ti alloy, the corrosion rate of VG‐coated Ti alloy reduces by 1–2 orders of magnitude in the simulated PEMFC operating environments and ICR decreases by ≈100 times, while its thermal conductivity improves by ≈20% and water contact angle increases by 68.1°. The results can be interpreted that the unique structure of VG enables excellent electrical and thermal conduction in PEMFCs, and the highly hydrophobic VG coating suppresses the penetration of corrosive liquid as well as contributing to water management. This study opens a new opportunity to reinforce metallic surfaces by the robust and versatile VG coating for high‐performance electrodes used in energy and catalyst applications.

Keywords: vertical graphene; graphene reinforced; titanium alloy; fuel cells; alloy

Journal Title: Advanced Materials
Year Published: 2022

Link to full text (if available)


Share on Social Media:                               Sign Up to like & get
recommendations!

Related content

More Information              News              Social Media              Video              Recommended



                Click one of the above tabs to view related content.