Accession Number:

ADA199035

Title:

Advanced Calcium Thionyl Chloride High Power Battery

Descriptive Note:

Periodic rept. no. 2, 23 Feb-24 Jun 1988

Corporate Author:

RAMAT-TEL-AVIV UNIV AUTHORITY FOR RESEARCH AND INDUSTRIAL DEVELOPMENT LTD (ISRAEL)

Personal Author(s):

Report Date:

1988-07-25

Pagination or Media Count:

40.0

Abstract:

We have made a breakthrough in the development of two advanced calcium thionyl chloride systems which have much better storage properties than the state-of-the-art Ca-SOC12 cell. This has been done by replacing the CaX2 XA1C14 electrolyte by SrX2 type A, or BaX2 type B. The projects goals are to gain a better understanding of the electrochemistry of the advanced systems and to establish their safety and performance. We present results regarding the properties of MX2-sulfur dioxide-TC solutions M calcium, strontium, barium, including Raman spectra, viscosity, and conductivity data. We explain the effect of SO2 and temperature on the conductivity and conduction mechanism. We studied the effect of 70 C storage on performance of the baseline C-size cell. A fresh cell delivered, at room temperature, 3.4 Ah and 3.2 Ah on 10 and 4 ohm load respectively. It lost 20 and 55 or more capacity after two and four weeks of storage at 70 C, much more than type A cell. Short circuit, heavy load and reversal tests of type A cells ended with no cell venting or leaking. Ampule corrosion tests of calcium foils in type A electrolyte reveal 0. 5-3 corrosion after four weeks of storage at 70 C. This indicates that a room temperature shelf life of more than ten years is feasible for type A system. Keywords Electric batteries.

Subject Categories:

  • Electrochemical Energy Storage

Distribution Statement:

APPROVED FOR PUBLIC RELEASE