Polymer-electrolyte fuel cells metallic bipolar plates

Silva, R.R et al., Surface conductivity and stability of metallic bipolar plate materials for polymer electrolyte fuel cells, Electrochim. Acta, 51, 3592, 2006. [Pg.309]

FIGURE 6.11 Relation between the current density-potential curve against the RHE (reversible hydrogen electrode) of stainless steel (left) and anode and cathode polarization curve of a polymer electrolyte fuel cell (right). (With kind permission from Springer Science+Business Media, Polymer Electrolyte Fuel Cell Durability. Influence of metallic bipolar plates on the durability of polymer electrolyte fuel cells. 2009. pp. 243-256. Scherer, J., Munter, D., and Strobel, R.)... [Pg.152]

Influence of Metallic Bipolar Plates on the Durability of Polymer Electrolyte Fuel Cells... [Pg.262]

Abstract This chapter describes the behavior and stability of metallic bipolar plates in polymer electrolyte fuel ceU application. Fundamental aspects of metallic bipolar plate materials in relation to suitability, performance and cell degradation in polymer electrolyte fuel cells are presented. Comparing their intrinsic functional properties with those of carbon composite bipolar plates, we discuss different degradation modes and causes. Furthermore, the influence and possible improvement of the materials used in bipolar plate manufacturing are described. [Pg.262]

Corrosion of the plates not only detracts from their mechanical properties but also gives rise to undesirable corrosion products, namely, heavy-metal ions, which, when depositing on the catalysts, strongly depress their activity. The corrosion processes also give rise to superficial oxide films on the metal parts, and these cause contact resistance of the surfaces. For a lower contact resistance, metallic bipolar plates sometimes have a surface layer of a more stable metal. Thus, in the first polymer electrolyte membrane fuel cell, developed by General Electric for the Gemini spacecraft, the bipolar plates consisted of niobium and tantalum coated with a thin layer of gold. A bipolar plate could also be coated with a layer of carbide or nitride. [Pg.167]

Materials and Coatings for Metallic Bipolar Plates in Polymer Electrolyte Membrane Fuel Cells 361... [Pg.15]

Yoon, W., X. Huang, P. Fazzino, K. Reifsnider, M. Akkaoui. 2008. Evaluation of coated metallic bipolar plates for polymer electrolyte membrane fuel cells. /. Power Sources 179(1) 265-273. [Pg.395]