Corrosion resistance and conductivity of amorphous carbon coated SS316L and TA2 bipolar plates in proton-exchange membrane fuel cells

Li, Wei; Liu, Lintao; Li, Zhengxian; Wang, Yanfeng; Li, Hongzhan; Lei, Jiajun

doi:10.1016/j.diamond.2021.108503

Cited by 26 publications

(6 citation statements)

References 36 publications

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“…Electrochemical testing.-The electrochemical polarization tests were carried out in a sealed electrolytic cell containing 200 mL mixed solution (pH = 3) of 5 × 10 -4 M H 2 SO 4 and 0.1 ppm HF saturated with air to simulate the PEMFC cathode environment. [60][61][62] For heat stability and contamination prevention from aggressive Cl − ions, a double salt-bridge silver/silver chloride (Ag/AgCl) electrode with a second section filled by saturated KNO 3 solution was used as a reference electrode (RE). A platinum sheet (15 × 15 × 0.2 mm 3 ) was utilized as the counter electrode (CE), and bare TA2 and Ti/Au were employed as the working electrode (WE).…”

Section: Methodsmentioning

confidence: 99%

Effect of Magnetic Field on Corrosion Behaviors of Gold-Coated Titanium as Cathode Plates for Proton Exchange Membrane Fuel Cells

Feng

Chen

Han

2022

J. Electrochem. Soc.

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Effects of the self-induced magnetic fields (MFs) generated by the operating current of proton exchange membrane fuel cells (PEMFCs) on metal bipolar plates have hardly been noticed but cannot be ignored. Therefore, corrosion behaviors and conductivity of gold-coated titanium (Ti/Au) and bare titanium (grade TA2) in simulated PEMFC cathode environment under MF were evaluated by electrochemical tests and interfacial contact resistance (ICR) measurements. The results indicated a considerable decrease in corrosion current and ICR of as-received Ti/Au, reaching 1/16 and 1/10 of those of bare TA2, respectively. The applied MF also led to a sharp decline in corrosion current of TA2 but slight increase for Ti/Au. Electrochemical impedance spectroscopy and scanning electron microscopy results suggested that MF significantly facilitated the corrosion durability of TA2 and ameliorated the induced pitting due to coating defects on Ti/Au. Compared to results obtained without MF, ICR of TA2 after 24 h potentiostatic polarization under MF further increased by 24%, while a decrease by 8% was recorded for Ti/Au. In sum, effects of self-induced MFs on the corrosion of metal bipolar plates is significant and these results revised for taking MF effects in account could be more accurate and realistic.

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Section: Methodsmentioning

confidence: 99%

Effect of Magnetic Field on Corrosion Behaviors of Gold-Coated Titanium as Cathode Plates for Proton Exchange Membrane Fuel Cells

Feng

Chen

Han

2022

J. Electrochem. Soc.

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“…The coating presented good corrosion resistance at 0.6 V (vs SCE); yet, at 1.4 V, severe local corrosion happened. [72] CVD graphene (GR) coating was proposed for 304 SS for BP application. The coated steel in 3.5 wt % NaCl showed a fivefold reduced i corr and avoided oxidation layer formation.…”

Section: Carbon Coatingsmentioning

confidence: 99%

Corrosion and Materials Degradation in Electrochemical Energy Storage and Conversion Devices

Saji

2023

ChemElectroChem

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Research and development on electrochemical energy storage and conversion (EESC) devices, viz. fuel cells, supercapacitors and batteries, are highly significant in realizing carbon neutrality and a sustainable energy economy. Component corrosion/ degradation remains a major threat to EESC device's long-term durability. Here, we provide a comprehensive account of the EESC device's corrosion and degradation issues. Discussions are mainly on polymer electrolyte membrane fuel cells, metal-ion and metal-air batteries and supercapacitors. Corrosion of bipolar plates/current collectors, carbon corrosion, electrode/ electrocatalyst degradation, and various mitigation approaches are detailed. The collective information provided could help develop EESC devices with better durability.

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“…where C is the space-charge capacitance, e is the electric charge of the carrier, N D is the donor carrier density, ε is the film relative permittivity (56) [40], ε 0 is the vacuum permittivity (8.854 × 10 −14 F/cm) [40], E represents the applied potential, E FB is the flat band potential, k is the Boltzmann constant, and T is the temperature. Donor carrier density (N D ) and flat band potential (E FB ) were calculated and are listed in Table 3.…”

Section: Electrochemical Characteristicsmentioning

confidence: 99%

Effect of pH on the Corrosion and Repassivation Behavior of TA2 in Simulated Seawater

et al. 2021

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The effect of pH on the corrosion and repassivation behavior of TA2 in simulated seawater was studied using electrochemical tests, immersion experiments, and surface morphology topology analysis. The results show that Ecorr and Rf increased while ipass and weight loss rate decreased as the pH of simulated seawater increased. The TA2 passive film was determined to be mainly composed of a large amount of TiO2 and a small amount of TiO. The repassivation function of TA2 can be expressed as E = −0.1375 + 0.0532ln(t − 1.241) for a simulated seawater pH of 8.2. The parameter b, which represents the slope of the potential–time curve during the friction electrode test, was used to evaluate the repassivation behavior of TA2. The increase in pH value was observed to promote the repassivation speed of the passive film, which is beneficial to the corrosion resistance of TA2.

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Corrosion resistance and conductivity of amorphous carbon coated SS316L and TA2 bipolar plates in proton-exchange membrane fuel cells

Cited by 26 publications

References 36 publications

Effect of Magnetic Field on Corrosion Behaviors of Gold-Coated Titanium as Cathode Plates for Proton Exchange Membrane Fuel Cells

Effect of Magnetic Field on Corrosion Behaviors of Gold-Coated Titanium as Cathode Plates for Proton Exchange Membrane Fuel Cells

Corrosion and Materials Degradation in Electrochemical Energy Storage and Conversion Devices

Effect of pH on the Corrosion and Repassivation Behavior of TA2 in Simulated Seawater

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