Our investigations support the development of advanced acid electrolyte fuel cells for power generation and transportation applications. The ions CF sub 3 SO sub 3- and H sub 2 PO sub 4- have similar adsorption characteristics on mercury from dilute aqueous electrolytes (less than 1 M). Transport properties in phosphoric acid show strong temperature and concentration dependences. Solvent clusters account for transport of 6 to 9 moles of water per mole of proton through Nation membranes. Exchange current densities for oxygen reduction on platinum are dependent on anion adsorption from the electrolyte and follow the sequence KOH greater than H sub 2 SO sub 4 approx. CF sub 3 SO sub 3 H greater than H sub 3 PO sub 4 greater than HCIO sub 4. The reaction order, with respect to oxygen for oxygen reduction at Pt in dilute CF sub 3 SO sub 3 H, is one half. The nuclear microprobe technique revealed (1) the three-dimensional distribution of platinum in a fuel cell electrode and (2) the loss of vanadium from a Pt-V electrocatalyst during fuel cell operation. The ellipsometric method was developed to measure anion adsorption on platinum. Single cells were assembled and tested for the proposed simulated drive-cycle-performance evaluations. An energy balance was made for a 20-kW phosphoric acid fuel cell power plant for a GM X-car. (ERA citation 09:04345)

  • Supplemental Notes:
    • Portions are illegible in microfiche products.
  • Corporate Authors:

    Los Alamos National Laboratory

    P.O. Box 1663
    Los Alamos, NM  United States  87545
  • Authors:
    • Srinivasan, S
    • Gonzalez, E R
    • Hsueh, K L
    • Hyde, P J
  • Publication Date: 1984-6

Media Info

  • Features: References;
  • Pagination: 63 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00393790
  • Record Type: Publication
  • Report/Paper Numbers: LA-10008-P
  • Files: TRIS
  • Created Date: May 31 1985 12:00AM