Modifying a Stainless Steel for PEMFC Bipolar Plates <i>via</i> Electrochemical Nitridation

Wang, H.; Turner, John A.

doi:10.1002/fuce.201300068

Cited by 9 publications

(3 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In a simulated PEMFC environment, nitrided 316 L stainless steel by electrochemical nitridation in nitrate-bearing solutions demonstrates exceptionally good electrochemical and corrosion properties . The nitrogen-incorporated oxides formed on the surface of stainless steel can effectively improve the corrosion resistance and electrical conductivity. ,− Although extensively investigated for PEMFC applications, the electrochemical nitridation technique has never been evaluated in Ti-based GDLs in PEM WE environments. Herein, for the first time, we focus on a method of electrochemical nitridation with a low-cost, corrosion-resistant, and conductive material for Ti-based GDLs in the PEM WE environment.…”

Section: Introductionmentioning

confidence: 99%

Modifying Ti-Based Gas Diffusion Layer Passivation for Polymer Electrolyte Membrane Water Electrolysis via Electrochemical Nitridation

Liu

Huang

Wang

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

A gas diffusion layer represents an important element of collector and stack components used in polymer electrolyte membrane (PEM) water electrolyzers (WE). Nowadays, titanium-based gas diffusion layers (GDLs) have high stability and are frequently employed as anode GDLs, yet reliability issues emerging from passivation have limited their practical deployment. Hence, we develop an inexpensive way of producing high conductivity and corrosion resistance of Ti-based GDLs through electrochemical nitridation. The morphology and content of the nitride phase on the surface of the Ti felt GDL are efficiently regulated by adjusting reduction potential and reaction time. According to X-ray photoelectron spectroscopy studies, the modified Ti felt is coated with ammonium ions and nitrogenincorporated oxides, namely, TiN/TiO x , on the surface. The nitride surface shows a low interfacial contact resistance (ca. 1.0 mΩ cm 2 at 140 N/cm 2 ) and excellent corrosion resistance (0.920 μA cm −2 ) in the simulated PEM WE environments. The electrochemical nitridation provides an economic way to introducing N layers on the surface of the Ti-based GDL with high performance, which is very promising for efficient PEM water electrolysis.

show abstract

Section: Introductionmentioning

confidence: 99%

Modifying Ti-Based Gas Diffusion Layer Passivation for Polymer Electrolyte Membrane Water Electrolysis via Electrochemical Nitridation

Liu

Huang

Wang

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…Nitrate ions would adsorb on the metallic surface, being later reduced to NH 4 + and metal nitride. More recently, some authors have proposed the use of electrochemical nitriding to attain high corrosion resistance and conductivity for stainless steels employed as bipolar plates for polymer electrolyte membrane fuel cells (PEMFCs) [27][28][29]. The composition of the nitrided layer plays a major role in the corrosion behavior of the treated surface.…”

Section: Introductionmentioning

confidence: 99%

“…The composition of the nitrided layer plays a major role in the corrosion behavior of the treated surface. Wang et al [29] observed the formation of nitrogen incorporated oxide (oxi-nitrides) in the surface of electrochemically nitrided AISI 446 stainless steels.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Relationship between the Surface Chemistry and the Corrosion Resistance of Electrochemically Nitrided AISI 304 Stainless Steel

Rocha

Pereira

Oliveira

et al. 2019

International Journal of Corrosion

View full text Add to dashboard Cite

The relationship between the surface chemistry and the corrosion resistance of electrochemically nitrided AISI 304 stainless steel samples has been investigated. The nitriding treatment was carried out in HNO3 0.1 M and HNO3 0.1 M + KNO3 0.5 M at room temperature. Samples were subjected to the nitriding procedure for 30 minutes under a cathodic potential of -0.7 VAg/AgCl. The chemical composition of the nitrided layers was assessed by X-ray photoelectron spectroscopy (XPS). Depth profiles of the main elements present in the nitrided layers were also obtained by XPS by etching them with argon ions. The corrosion behavior of the nitrided samples was evaluated by potentiodynamic polarization. The results showed that the nitrided layers consisted of a mixture of chromium nitrides, chromium oxides, iron oxides/oxyhydroxides, and nickel oxide. The best corrosion resistance was obtained by electrochemical nitriding in the HNO3 0.1 M + KNO3 0.5 M solution. This result could be correlated with the composition and thickness of the nitrided layer.

show abstract

Challenges and Perspectives of Metal‐Based Proton Exchange Membrane's Bipolar Plates: Exploring Durability and Longevity

Stein

Ein‐Eli

2020

Energy Tech

View full text Add to dashboard Cite

Proton exchange membrane fuel cells (PEMFCs) generate electricity utilizing the energy of electrochemical reactions of fuel (H2) and oxidants (O2/air). As they emit no toxic gases during the process, they are considered as a clean energy source that can be beneficial and might replace the use of fossil fuels. To compose a FC stack, an essential component, bipolar plates (BPs), is needed. They have several roles to fulfill during PEMFC stack operation, and there are many challenges when it comes to BPs metal‐based materials and their sustainability, durability, and longevity. Finding suitable metal and alloy materials is a significant task as BP materials should have multiple qualities that sometimes come at the expense of one another. As BPs constitute a significant part of PEMFC stack by means of volume, weight, and costs, the pursuit of the most suitable and least expensive metal‐based materials is comprehensible. In this Review, different metal and alloy types (copper, nickel, titanium, and aluminum alloys) and their own particular challenges are discussed, emphasizing the most important family of materials candidates—stainless steels.

show abstract

Modifying a Stainless Steel for PEMFC Bipolar Plates via Electrochemical Nitridation

Cited by 9 publications

References 33 publications

Modifying Ti-Based Gas Diffusion Layer Passivation for Polymer Electrolyte Membrane Water Electrolysis via Electrochemical Nitridation

Modifying Ti-Based Gas Diffusion Layer Passivation for Polymer Electrolyte Membrane Water Electrolysis via Electrochemical Nitridation

Investigation on the Relationship between the Surface Chemistry and the Corrosion Resistance of Electrochemically Nitrided AISI 304 Stainless Steel

Challenges and Perspectives of Metal‐Based Proton Exchange Membrane's Bipolar Plates: Exploring Durability and Longevity

Contact Info

Product

Resources

About