Advanced Calcium-Thionyl Chloride High-Power Battery
Abstract
In this phase we have demonstrated that an improved c-size Ca/TC A type cell can deliver at RT up to 5.5 Ah at low rates and 4.4 Ah at 0.9A rate. It has 10 to 80% more capacity than have commercial Li-TC and Li-SO2 wound C- size cells. The improved Ca-TC cell lost almost no capacity after 4-5 weeks of storage at 70 C. It generates less heat at 20 C under OCV conditions than equivalent Li/TC cells, having the same electrode area, i.e. it has a longer shelf life. The improved shelf-life of calcium in BaX2/TC solutions as compared to CaX2/TC solutions results mainly from the difference in the solubility or reactivity of the CaO film in those two solutions. In CaX2/TC solutions the oxide dissolves leaving the calcium with a CaCl2 layer which does not provide the metal with good protection. In BaX2/TC solutions, on the native CaO layer a BaCl2 & AlCl3 or Al2O3 layer is formed. This BaCl3 & AlCl3 & Al2O3 layer does not form when the oxide is missing from the surface. Therefore cleaned calcium in BaX2/TC solution corrodes at the same rate as does calcium in CaX2/TC solutions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 15, 1989
- Accession Number
- ADA216685
Entities
People
- Emanuel Peled