DEVELOPMENT OF HIGH-SPECIFIC-ENERGY BATTERIES FOR ELECTRIC VEHICLES

This report describes the research efforts to develop a high-specific-energy lithium/sulfur battery having the performance characteristics required for powering pollution-free automobiles. The cells currently under development have negative electrodes of molten lithium and positive electrodes of iron sulfide separated by a molten lithium halide-containing electrolyte. The operating temperature of the cells is about 400 deg C. The performance goals for a single cell include a capacity density of 0.3 A-hr/sq cm at a current density of 0.15 A/sq cm, a peak power density of 1-3 W/sq cm, and a minimum cycle life of 1000 cycles. Cells with negative electrodes of liquid lithium and positive electrodes of FeS2-Li2S mixtures in graphite housings have achieved short-time peak power densities as high as 1.4 W/sq cm and have sustained power densities up to 0.6 W/sq cm for approximately 50 sec. Capacity densities as high as 0.38 A-hr/sq cm have been achieved upon charging at a current density of 0.025 A/sq cm and discharging at 0.1 a/sq cm. Several cells have been operated for more than 500 hr and 100 cycles with only moderate declines in capacity density over the cell lifetime. Recent laboratory studies have included the evaluation of support materials for the lithium electrode, investigations of the electronic conductivity of LiC1-KC1 in equilibrium with lithium, and determination of the oxidation potential of metals and alloys in LiC1-KC1. The materials studies include the development of suitable electrode separators and the corrosion testing of metal and ceramic materials being considered for various cell components. /Author/

  • Corporate Authors:

    Argonne National Laboratory

    9700 South Cass Avenue
    Argonne, IL  USA  60439
  • Authors:
    • Nelson, P A
    • Gay, E C
    • Steunenberg, R K
    • Battles, J E
    • Schertz, W W
    • VISSERS, D R
    • Myles, Km
    • Webster, D S
    • Burris, L
  • Publication Date: 1974-6

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 35 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00263924
  • Record Type: Publication
  • Report/Paper Numbers: ANL-8058, Progress Report
  • Files: TRIS
  • Created Date: Dec 13 1974 12:00AM