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Conductive and corrosion behaviors of silver-doped carbon-coated stainless steel as PEMFC bipolar plates

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Abstract

Ni–Cr enrichment on stainless steel SS316L resulting from chemical activation enabled the deposition of carbon by spraying a stable suspension of carbon nanoparticles; trace Ag was deposited in situ to prepare a thin continuous Ag-doped carbon film on a porous carbon-coated SS316L substrate. The corrosion resistance of this film in 0.5 mol·L−1 H2SO4 solution containing 5 ppm F− at 80°C was investigated using polarization tests. The results showed that the surface treatment of the SS316L strongly affected the adhesion of the carbon coating to the stainless steel. Compared to the bare SS316L, the Ag-doped carbon-coated SS316L bipolar plate was remarkably more stable in both the anode and cathode environments of proton exchange membrane fuel cell (PEMFC) and the interface contact resistance between the specimen and Toray 060 carbon paper was reduced from 333.0 mΩ·cm2 to 21.6 mΩ·cm2 at a compaction pressure of 1.2 MPa.

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Authors and Affiliations

  1. College of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian, 116028, China

    Ming Liu, Hong-feng Xu, Jie Fu & Ying Tian

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  1. Ming Liu
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  2. Hong-feng Xu
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  3. Jie Fu
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  4. Ying Tian
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Correspondence to Hong-feng Xu.

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Liu, M., Xu, Hf., Fu, J. et al. Conductive and corrosion behaviors of silver-doped carbon-coated stainless steel as PEMFC bipolar plates. Int J Miner Metall Mater 23, 844–849 (2016). https://doi.org/10.1007/s12613-016-1299-8

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  • DOI: https://doi.org/10.1007/s12613-016-1299-8

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