Surface modification of 316 stainless steel with platinum for the application of bipolar plates in high performance proton exchange membrane fuel cells

Lin, Kaijie; Li, Xiaoying; Dong, Hanshan; Du, Shangfeng; Lu, Yaxiang; Ji, Xiaochao; Gu, Dongdong

doi:10.1016/j.ijhydene.2016.09.220

Cited by 40 publications

(19 citation statements)

References 24 publications

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“…During the ASPN treatments, Si wafers were placed on the surface of 316 SS samples and treated simultaneously. The detail of the ASPN treatments can be found in previous publications [11] [14]. The main power was applied on the big active screen to generate plasma and control temperature.…”

Section: Methodsmentioning

confidence: 99%

“…Active screen plasma nitriding (ASPN) technology has received considerable studies since it was invented by J. Geoges in the early 2000s. [1] This novel surface plasma technology offers many advantages over the conventional direct current plasma method, such as better surface quality and layer uniformity [2], and has been applied in the field of medical devices [3][4][5], orthopaedic devices [6][7][8] and hydrogen fuel cells [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen mass transfer and surface layer formation during the active screen plasma nitriding of austenitic stainless steels

Lin

Dong

et al. 2018

Vacuum

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nitrogen mass transfer and surface layer formation during the active screen plasma nitriding of austenitic stainless steels

Lin

Dong

et al. 2018

Vacuum

Self Cite

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“…Plasma nitriding is one of the few technologies that allow us to increase the surface hardness and abrasion resistance of austenitic steels, and thanks to this surface treatment we can use austenitic stainless steels in other more demanding applications in industries such as chemical, petrochemical food or medical articles. [1][2][3][4][5] The issue of nitrided layers formed on austenitic steels has been intensively solved since the 1990s, when the properties of these layers such as their depth, hardness, abrasion resistance and their influence on the corrosion resistance of steels are investigated. [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Hardness of Nitrided Layers Treated by Plasma Nitriding

Joska

Pokorny

Kadlec

et al. 2020

APP

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Stainless steels, particularly the austenitic stainless grades are widely used in many industries due to good corrosion resistance, but very poor mechanical properties as surface hardness and wear resistance limit its possible use. Plasma nitriding is one of the few ways to increase the surface hardness of these steels, even though this will affect its corrosion resistance. This paper focuses on the description of the mechanical properties of nitrided layers in the two most widespread austenitic stainless steels AISI 304 and AISI 316L. The microstructure and properties of nitrided layers were evaluated by metallography and microhardness measurement. Surface properties of nitrided steels were characterized by Martens hardness. The results show that plasma nitriding created very hard nitrided layers with thickness about 40 μm and microhardness about 1300 HV0.05. Surface hardness measurements have shown that the maximum values for both steels are about 8.5 GPa, but have different behaviour under higher loads, when the AISI 316L nitrided layer began to crack on the surface and sink.

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“…The corrosion resistance and conductivity of a modified stainless steel bipolar plate in a fuel cell operating at a normal temperature will be greatly improved in the future [23,24]. When a fuel cell operates in a low-temperature environment, the water generated by the cathode catalytic layer enters the flow channel through the gas diffusion layer.…”

Section: Introductionmentioning

confidence: 99%

Study on the Properties of Vertical Carbon Nanotube Films Grown on Stainless Steel Bipolar Plates

Shi

Jin

et al. 2019

Materials

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Research on the conductivity and corrosion resistance of stainless steel bipolar plates in a proton exchange membrane fuel cell (PEMFC) is commonly performed in a normal-temperature environment (about 20 °C). However, these fuel cells must function in low-temperature environments (lower than 0 °C) in some conditions, such as in vehicle fuel cells and in portable power supplies that operate during the winter in northern China. Stainless steel bipolar plates have higher requirements in terms of their hydrophobic and anti-icing properties, in addition to needing high conductivity and corrosion resistance. In this study, carbon nanotubes (CNTs) are grown on the surface of 304 stainless steel (304 SS) without a catalyst coating by plasma-enhanced chemical vapor deposition (PECVD), which is a simple and cheap method that allows stainless steel to be used as bipolar plates in low-temperature environments. The Raman spectroscopy and scanning electron microscopy (SEM) results show that the CNTs grown on the surface of 304 SS have different morphologies. The stainless steel samples with different CNT morphologies are tested by hydrophobicity and in situ icing experiments to prove that vertical CNTs can achieve a superhydrophobic state and have good anti-icing properties. The interfacial contact resistance (ICR) of the bare 304 SS and the 304 SS with vertical CNTs is compared by voltammetry, and then the corrosion resistances of both types is compared in a simulated PEMFC environment via a three-electrode system. Consequently, the ICR of the 304 SS with vertical CNTs was lower than the bare 304 SS. The corrosion potential was positive, and the corrosion current density was greatly reduced for the stainless steel with vertical CNTs grown directly on its surface when compared with the bare 304 SS. The experimental results show that vertical CNTs have good application prospects as bipolar plates for PEMFCs in low-temperature environments.

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Surface modification of 316 stainless steel with platinum for the application of bipolar plates in high performance proton exchange membrane fuel cells

Cited by 40 publications

References 24 publications

Nitrogen mass transfer and surface layer formation during the active screen plasma nitriding of austenitic stainless steels

Nitrogen mass transfer and surface layer formation during the active screen plasma nitriding of austenitic stainless steels

Hardness of Nitrided Layers Treated by Plasma Nitriding

Study on the Properties of Vertical Carbon Nanotube Films Grown on Stainless Steel Bipolar Plates

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