Pore Size, Zinc Penetration, and Zinc Diffusion Studies on PPQ/CA Separators
Abstract
Studies were performed of some properties of co-polymeric polyphenylquinoxaline/cellulose acetate (PPQ/CA-60/40) membranes that are candidate separator materials for secondary alkaline batteries. Pore size measurements were obtained by bubble pressure, mercury porosimetry and electron microscopy methods. Zinc penetration measurements and measurements of zinc ion diffusion through the membrane were obtained in aqueous potassium hydroxide media using standardized electrolysis methods. For comparison purposes, dendrite penetration and zinc diffusion measurements were also obtained for two conventional cellulosic separator materials. It was concluded that the methods chosen are valid and useful for assessing the quality of separator materials. It was also concluded that PPQ/CA-60/40 membranes compare favorably with conventional separator materials.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 02, 1981
- Accession Number
- ADA107354
Entities
People
- Isaac Angres
- Wendy Parkhurst
Organizations
- Naval Ordnance Laboratory