Accession Number:

ADB000985

Title:

New Cathode Material for High Energy-Density Batteries

Descriptive Note:

Final rept. 1 Oct 1973-30 Jun 1974

Corporate Author:

ROCKWELL INTERNATIONAL CANOGA PARK CA ATOMICS INTERNATIONAL DIV

Personal Author(s):

Report Date:

1974-07-31

Pagination or Media Count:

49.0

Abstract:

The investigation of semiconductor cathode materials for organic- electrolyte batteries was continued, with emphasis on the development of higher- rate porous plates containing n-type cadmium fluoride as the active ingredient. The problem of maintaining electronic contact through a porous semiconductor of high energy gap was examined in some detail from a fundamental viewpoint, and a systematic approach to the selection of current-collector additives was devised. Experimentally, the discharge characteristics of miniature porous CdF2 cathodes in 0.1 M TMA.PF6-PC were compared with those of a single-crystal electrode which served, on a weight basis, as a high-performance standard. The additive materials were indium-tin solder, graphite, cadmium, sputtered aluminum, and four compounds capable of existing as n-type semiconductors ZnS, ZnSe, CdSe, and In2O3. The best cathode formulation contained CdF2, In-Sn, In2O3, and a polystyrene binder. With a discharge potential of 1.1 v vs LiLit and a utilization efficiency of 38 in approx 11 hr, the performance of this electrode was comparable to that of more advanced plate structures containing semiconductive Ni3S2.

Subject Categories:

  • Electrical and Electronic Equipment
  • Electrochemical Energy Storage
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE