Sodium-Air Batteries Based on Sodium Super-Ionic Conducting Electrolyte

Period of Performance: 12/29/2004 - 06/29/2005

$119K

Phase 1 SBIR

Recipient Firm

Ceramatec, Inc.
2425 South 900 West
Salt Lake City, UT 84119
Principal Investigator

Abstract

High energy density battery will be developed by combining metallic sodium anode with an air cathode. The proposed sodium-air battery is expected to dominate the performance of lithium-air battery. This battery technology is based on sodium conducting solid-electrolyte developed at Ceramatec Inc. The sodium conducting solid-electrolyte has conductivity in the range of 10-2 S/cm at ambient temperature and is expected to be chemically stable when in contact with sodium metal. The proposed electrolyte can be fabricated into a thin structure, which will significantly enhance the gravimetric and volumetric energy and power density characteristics of sodium-air batteries. The proposed batteries can potentially deliver energy densities exceeding 500 Wh/kg and cell voltages of 2.5 - 3.0 V with potentially high rate capability, charge retention, and shelf life characteristics required for military applications