TECHNOLOGY BASE RESEARCH ON ZINC/AIR BATTERY SYSTEMS: FINAL REPORT

The capacity extension of additives was tested in a 200 cm sup 2 bi-cell and a Zn powder moving-bed slurry. It was found that for the Type A additives in 12 M KOH, 25 g/l of silicate provided higher capacity than stannate, titanate and aluminate additives. The optimum concentration of sorbitol (a Type B additive that stabilizes polymeric chains involving ZnO) was found to be 15 g/l in 12 M KOH. A silicate and sorbitol combination added to Zn powder slurry in 12 M KOH provided a 20% increase in dischange capacity (195 Ah/l at 200 A/cm sup 2) compared to the maximum capacity obtained with silicate alone. A much lower capacity (74 Ah/l) was realized with silicate as Type C additive (precipitation of ZnO away from the Zn surface, for low KOH concentrations). The mechanisms of passivation and capacity extension were discussed and a model presented.

• Corporate Authors:

  Pinnacle Research Institute

  Cupertino, CA  United States 
• Authors:
  • Sierra Alcazar, H B
  • Nguyen, P D
  • Pinoli, A A
• Publication Date: 1987-9

Media Info

• Pagination: 50 p.

Subject/Index Terms

• TRT Terms: Additives; Electric batteries; Zinc
• Uncontrolled Terms: Capacity; Increase
• Old TRIS Terms: Zinc-air batteries
• Subject Areas: Energy; Highways; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 00477020
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: LBL-23960
• Files: TRIS
• Created Date: Nov 30 1988 12:00AM