Niobium (Nb) sputter coated 316L stainless steel (SS) is investigated as an alternative to a previously developed Nb clad 304L SS material for use in a bipolar plate component of a polymer electrolyte membrane fuel cell (PEMFC) stack. The electrochemical properties of the Nb sputter coated 316L SS are evaluated via static corrosion and interfacial contact resistance testing and through potentiodynamic and potentiostatic measurements conducted under half-cell environments of a standard PEMFC stack. The experimental results show that the electrochemical properties of the sputtered Nb coatings are quite viable for the PEMFC bipolar plate application, while the thickness of the sputtered Nb coating is substantially thinner than that of the roll clad Nb coating.
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Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South KoreaYonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
Lee, Seok-Hee
Yang, Tae-Hyun
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Korea Inst Energy Res, Hydrogen & Fuel Cell Dept, Polymer Elect Fuel Cell Res Ctr, Taejon 305343, South KoreaYonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
Yang, Tae-Hyun
Hyun, Sang-Hoon
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Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South KoreaYonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
Hyun, Sang-Hoon
Yoon, Young-Soo
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Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South KoreaYonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea