Corrosion stability of SUS316L HVOF sprayed coatings as lightweight bipolar plate materials in PEM fuel cells

Abstract

This study investigated the corrosion stability of high velocity oxy-fuel (HVOF) spray SUS316L coatings on aluminium substrate as lightweight bipolar plate materials for proton exchange membrane fuel cells (PEMFC). Contact resistance, microhardness and structure of the coatings were characterised using a four-point probe, pneumatic microhardness, XRD and scanning electron microscope techniques. Preliminary electrochemical results indicate that the SUS316L coated plates significantly lowered the corrosion current of the aluminium substrate by more than one order of magnitude. Corrosion stability in relation to the coating thickness is discussed in terms of the structure composition and transpassivity of chromium.

Effect of substrate material on the corrosion of TiN-coated stainless steels in simulated anode and cathode environments of proton exchange membrane fuel cells

“…According to the U.S. Department of Energy (DOE) Annual (2007) review of fuel cells, the cost target in 2015 for bipolar plates is $3 kW −1 out of a total cost of $30 kW −1 for a direct hydrogen fuel cell power system for transportation [2]. Metallic bipolar plates are being widely researched in order to substitute for the non-porous graphite bipolar plates in order to reduce weight, cost and volume [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Controlled-synthesis of hierarchical NiCo2O4 anchored on carbon nanofibers mat for free-standing and highly-performance supercapacitors

“…Among a large number of the fabricated and tested pseudocapacitive materials, flexible SCs based on metal oxides electrodes such as RuO2 [16], MnO2 [17 -19] , NiO [20], and Co3O4 nanostructures [21,22] were got attention due to their outstanding performances and not to contain toxic elements such as sulfides and selenides. Although the promising performance of RuO2 Flexible SC (as high as 700 F g -1 ), its large-scale application is restricted by its rareness in nature [23][24][25][26]. On the other side, the large-scale applications of earth-abundant metal oxides (MnO2, NiO, Co3O4, …etc) in flexible SC devices are hindered by their inferior electric conductivity, low specific capacitances than RuO2 besides the relatively short cycling life compared to carbon-based devices [27,28].…”

Controlled-Synthesis of Hierarchical NiCo2O4 Anchored on Carbon Nanofibers Mat for Free-Standing and Highly-Performance Supercapacitors

“…Among a large number of the fabricated and tested pseudocapacitive materials, flexible SCs based on metal oxides electrodes such as RuO2 [16], MnO2 [17][18][19] , NiO [20], and Co3O4 nanostructures [21,22] were got attention due to their outstanding performances and not to contain toxic elements such as sulfides and selenides. Although the promising performance of RuO2 Flexible SC (as high as 700 F g -1 ), its large-scale application is restricted by its rareness in nature [23][24][25][26]. On the other side, the large-scale applications of earth-abundant metal oxides (MnO2, NiO, Co3O4, …etc) in flexible SC devices are hindered by their inferior electric conductivity, low specific capacitances than RuO2 besides the relatively short cycling life compared to carbon-based devices [27,28].…”