Corrosion behavior and conductivity of TiNb and TiNbN Coated Steel For Metallic Bipolar Plates

Kun Shi; Xue Li; Yang Zhao; Wei Wei Li; Shu Bo Wang; Xiao Feng Xie; Li Yao; Jens Oluf Jensen; Qing Feng Li

doi:10.3390/app9122568

Corrosion behavior and conductivity of TiNb and TiNbN Coated Steel For Metallic Bipolar Plates

Kun Shi, Xue Li, Yang Zhao, Wei Wei Li, Shu Bo Wang^*, Xiao Feng Xie, Li Yao, Jens Oluf Jensen, Qing Feng Li

^*Corresponding author for this work

Department of Energy Conversion and Storage

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

To improve corrosion resistance and electronic conductivity of bipolar plates for proton exchange membrane fuel cells (PEMFC), coatings of TiNb and TiNbN on 316L stainless steel (SS) were prepared by magnetron sputtering. X-ray diffraction measurements confirmed the existence of metallic nitrides in the TiNbN coating. Scanning electron microscope tests showed that the deposited coatings provided smooth surfaces. Further electrochemical measurements indicated that the corrosion resistance of the TiNb coating was significantly higher than that of the substrate. At 0.19 V vs MSE, the long-term stabilized current density of TiNb/316L SS was lower than 1 μA·cm^-2. The interfacial contact resistance values between coating and carbon paper suggested that TiNb and TiNbN films had better contact conductivity than the 316L SS substrate. In conclusion, TiNb coated 316L SS metallic bipolar plate material is a promising option for PEMFC.

Original language	English
Article number	2568
Journal	Applied Sciences (switzerland)
Volume	9
Issue number	12
Number of pages	12
ISSN	2076-3417
DOIs	https://doi.org/10.3390/app9122568
Publication status	Published - 2019

Keywords

Coating
Metallic bipolar plate
PEMFC
TiNb
TiNbN

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Applsci 09 02568 v2Final published version, 3.17 MB

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title = "Corrosion behavior and conductivity of TiNb and TiNbN Coated Steel For Metallic Bipolar Plates",

abstract = "To improve corrosion resistance and electronic conductivity of bipolar plates for proton exchange membrane fuel cells (PEMFC), coatings of TiNb and TiNbN on 316L stainless steel (SS) were prepared by magnetron sputtering. X-ray diffraction measurements confirmed the existence of metallic nitrides in the TiNbN coating. Scanning electron microscope tests showed that the deposited coatings provided smooth surfaces. Further electrochemical measurements indicated that the corrosion resistance of the TiNb coating was significantly higher than that of the substrate. At 0.19 V vs MSE, the long-term stabilized current density of TiNb/316L SS was lower than 1 μA·cm-2. The interfacial contact resistance values between coating and carbon paper suggested that TiNb and TiNbN films had better contact conductivity than the 316L SS substrate. In conclusion, TiNb coated 316L SS metallic bipolar plate material is a promising option for PEMFC.",

keywords = "Coating, Metallic bipolar plate, PEMFC, TiNb, TiNbN",

author = "Kun Shi and Xue Li and Yang Zhao and Li, {Wei Wei} and Wang, {Shu Bo} and Xie, {Xiao Feng} and Li Yao and Jensen, {Jens Oluf} and Li, {Qing Feng}",

year = "2019",

doi = "10.3390/app9122568",

language = "English",

volume = "9",

journal = "Applied Sciences (switzerland)",

issn = "2076-3417",

publisher = "MDPI AG",

number = "12",

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TY - JOUR

T1 - Corrosion behavior and conductivity of TiNb and TiNbN Coated Steel For Metallic Bipolar Plates

AU - Shi, Kun

AU - Li, Xue

AU - Zhao, Yang

AU - Li, Wei Wei

AU - Wang, Shu Bo

AU - Xie, Xiao Feng

AU - Yao, Li

AU - Jensen, Jens Oluf

AU - Li, Qing Feng

PY - 2019

Y1 - 2019

N2 - To improve corrosion resistance and electronic conductivity of bipolar plates for proton exchange membrane fuel cells (PEMFC), coatings of TiNb and TiNbN on 316L stainless steel (SS) were prepared by magnetron sputtering. X-ray diffraction measurements confirmed the existence of metallic nitrides in the TiNbN coating. Scanning electron microscope tests showed that the deposited coatings provided smooth surfaces. Further electrochemical measurements indicated that the corrosion resistance of the TiNb coating was significantly higher than that of the substrate. At 0.19 V vs MSE, the long-term stabilized current density of TiNb/316L SS was lower than 1 μA·cm-2. The interfacial contact resistance values between coating and carbon paper suggested that TiNb and TiNbN films had better contact conductivity than the 316L SS substrate. In conclusion, TiNb coated 316L SS metallic bipolar plate material is a promising option for PEMFC.

AB - To improve corrosion resistance and electronic conductivity of bipolar plates for proton exchange membrane fuel cells (PEMFC), coatings of TiNb and TiNbN on 316L stainless steel (SS) were prepared by magnetron sputtering. X-ray diffraction measurements confirmed the existence of metallic nitrides in the TiNbN coating. Scanning electron microscope tests showed that the deposited coatings provided smooth surfaces. Further electrochemical measurements indicated that the corrosion resistance of the TiNb coating was significantly higher than that of the substrate. At 0.19 V vs MSE, the long-term stabilized current density of TiNb/316L SS was lower than 1 μA·cm-2. The interfacial contact resistance values between coating and carbon paper suggested that TiNb and TiNbN films had better contact conductivity than the 316L SS substrate. In conclusion, TiNb coated 316L SS metallic bipolar plate material is a promising option for PEMFC.

KW - Coating

KW - Metallic bipolar plate

KW - PEMFC

KW - TiNb

KW - TiNbN

U2 - 10.3390/app9122568

DO - 10.3390/app9122568

M3 - Journal article

SN - 2076-3417

VL - 9

JO - Applied Sciences (switzerland)

JF - Applied Sciences (switzerland)

IS - 12

M1 - 2568

ER -

Corrosion behavior and conductivity of TiNb and TiNbN Coated Steel For Metallic Bipolar Plates

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