Sealed Nickel-Zinc Rechargeable Batteries.
Abstract
Data are presented which show that high energy sealed nickel-zinc cells are at present capable of over 300 maintenance free cycles at 62% depth of discharge. Energy densities range from 25 - 30 Wh/lb at rates of discharge of 3C to C/4. Improved inorganic separators (ERC-2001) are discussed which contain a metallic layer hydroxide in combination with 20% by weight Teflon binder. These separators are ultra-thin, can easily be folded, and maintain their physical integrity during cycling. The rate of oxygen recombination in sealed cells has been improved through the use of silver-mercury recombination electrodes. Dissection of a representative cell with 2001 separators after 315 cycles showed that no zinc was present in the separators, negative electrode shape change was 32% and the positive electrodes had increased an average 20% in thickness.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1972
- Accession Number
- AD0748896
Entities
People
- Allen Charkey