Resistivity of bipolar plate materials at the cathode interface in molten carbonate fuel cells.

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Measurements of oxide scale resistivity for prospective bipolar plate materials in the molten carbonate fuel cell (MCFC) are coupled with observations of microstructural/compositional change over time. This work searches for a compromise to the high corrosion rate of Type 316L and the high oxide scale resistance of Type 310S. We tested a group of materials having chromium content ranging from 16 to 31 wt%, including Nitronic 50 and NKK, a Ni-Cr-Fe alloy. Chromium content was found to be the primary determinant of oxide scale composition. In the MCFC cathode compartment, stainless steels generally formed a duplex structure with an inner ... continued below

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15 p.

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Kaun, T. D. November 18, 1998.

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Measurements of oxide scale resistivity for prospective bipolar plate materials in the molten carbonate fuel cell (MCFC) are coupled with observations of microstructural/compositional change over time. This work searches for a compromise to the high corrosion rate of Type 316L and the high oxide scale resistance of Type 310S. We tested a group of materials having chromium content ranging from 16 to 31 wt%, including Nitronic 50 and NKK, a Ni-Cr-Fe alloy. Chromium content was found to be the primary determinant of oxide scale composition. In the MCFC cathode compartment, stainless steels generally formed a duplex structure with an inner Cr-rich layer and an outer, Fe-rich layer. The composition of the inner Cr-rich layer was related to the base alloy and had a controlling effect on scale resistivity. Oxide scale resistivity was measured for two electrolyte compositions: Li/K and Li/Na carbonates. Changes in the physical/mechanical properties (spallation/cracking) in the oxide scale of Type 316L provided an understanding of its resistivity fluctuations over time.

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15 p.

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OSTI as DE00010838

Medium: P; Size: 15 pages

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  • 194th Electrochemical Society Meeting, Boston, MA (US), 11/01/1998--11/06/1998

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  • Report No.: ANL/CMT/CP-96628
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 10838
  • Archival Resource Key: ark:/67531/metadc622716

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  • November 18, 1998

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  • June 16, 2015, 7:43 a.m.

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  • April 7, 2017, 3:10 p.m.

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Kaun, T. D. Resistivity of bipolar plate materials at the cathode interface in molten carbonate fuel cells., article, November 18, 1998; Illinois. (digital.library.unt.edu/ark:/67531/metadc622716/: accessed December 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.