Abstract

AbstractChallenge on energy resources exists, especially when the fossil resources are limited. Fuel cells, as an alternative replacement, can be used. Fuel cells with coated bipolar plates are the interest of this paper. Current research is concerned with the effects of CrN/TiN coatings on interfacial contact resistance (ICR). Stainless steel 410 was selected as a base metal, and the coating process was performed using chromium nitride and titanium nitride by cathodic arc evaporation method. It was found that the surface roughness and ICR values of CrN-coated sample are lower than the TiN-coated sample. The concluded that the CrN layer could be replaced with the TiN layer for better performance of bipolar plates.

Highlights

  • One of the systems that produce clean energy is the fuel cell

  • The average interfacial contact resistance (ICR) value of the TiN-coated group was higher than CrN-coated group, their differences were insignificant, with 95% of confidence interval (P-Value = 0.336)

  • The trend of ICR is a function of surface roughness for coating samples; it means that the CrN-coated bipolar plates have lower ICR values than TiN-coated

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Summary

Introduction

One of the systems that produce clean energy is the fuel cell. A fuel cell can converts the chemical energy of a fuel directly into electrical energy. Fuel cells as a new generation of clean energy producers have more beneficiaries; including higher performance than other traditional energy sources, simpler design, utilization of hydrogen as a reactor (without environmental pollution), its widespread applications on a small and large scale can be concluded that the designing and optimization of these systems are significant [1]. In this regard, bipolar plates are one of the most significant segments of a fuel cell, which are responsible for separating cells, connecting the cathode to the anode from one cell to another with appropriate electrical conductivity, and feeding reactive gases through gas channels, etc. Stainless steel is one of the appropriate choices for making bipolar plates [3]

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