Novel Methods to Improve Performance of Silver-Zinc Batteries

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N00024-12-C-4118
Agency Tracking Number: N101-054-0994
Amount: $730,464.00
Phase: Phase II
Program: SBIR
Awards Year: 2012
Solicitation Year: 2010
Solicitation Topic Code: N101-054
Solicitation Number: 2010.1
Small Business Information
Yardney Technical Products, Inc.
2000 South County Trail, East Greenwich, RI, -
DUNS: 617158712
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Greg Moore
 Project Manager
 (860) 599-1100
Business Contact
 Vincent Yevoli
Title: COO
Phone: (860) 599-1100
Research Institution
The goal of this project is to take silver-zinc battery technology to a new level for programs important to the Navy. Silver-Zinc batteries provide high energy and power density cells, and since the electrolyte is a water-based alkaline fluid, provide a comparatively safe battery. A disadvantage to this technology is large format cells, which are required to provide high power, do not provide comparable cycle life performance to competing systems. There are two main issues. One is the negative electrode, having redox products being zinc and zinc oxide, experiences non-uniform re-plating of the zinc upon charging. The mass tends toward the bottom of the current collector as the cell accumulates cycles. The other issue is the separator, commonly used cellophane, experiences degradation due to the strongly oxidative positive silver oxide electrode. The primary work will be to advance from the Phase I to the Phase II the further refinements of circumventing the shortcomings of silver/zinc. This includes incorporating binders with the negative electrodes to limit dissolution of the electrode while cycling and developing a non-cellulosic cellophane replacement. Also included will be advances in thermal pathway to remove heat from cells during discharge and providing an advanced silver/zinc battery management system.

* information listed above is at the time of submission.

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