Development of a supported liquid membrane as a nickel-zinc secondary battery separator
Abstract
A liquid tertiary amine complexing agent was dissolved in an organic solvent and absorbed into and held within the pores of a microporous polymeric film by either capillary or surface force. Screening tests were performed to identify the optimum tertiary amine/organic solvent combinations, and the optimum concentration range of the amine solutions. The treatment of Celgard 2400 microporous film with certain tertiary amine/organic solvent solutions, such as triethylamine/xylene or tripropylamine/xylene, had no significant effect on either zinc penetration resistivity (ZPR) or electrolytic resistivity of the membrane. When the film was treated with tri-n-octylamine solutions of very high amine concentration, the potential difference between the zinc cathode and the Ni(OH)2 counter electrode, the electrolytic resistance of the membrane, increased sharply. Among the tertiary amine solutions tested in this study, trihexylamine/xylene, tri-n-octylamine/toluene, and tri-n-octylamine/xylene appeared to be the most promising, especially the last one. The treatment of the Celgard 2400 film with that solution increased the zinc penetration resistivity of the membrane by as much as 400%. This solution treatment also improved the electrolytic conductivity of the Celgard 2400 film.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- May 1985
- Bibcode:
- 1985STIN...8612784P
- Keywords:
-
- Adsorption;
- Amines;
- Membranes;
- Nickel Zinc Batteries;
- Polypropylene;
- Separators;
- Liquids;
- Storage Batteries;
- Thin Films;
- Energy Production and Conversion