Advanced Neutrally Buoyant Rechargeable Batteries Based on Ceramic Electrolyte Separators

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N00014-07-M-0298
Agency Tracking Number: N074-022-0015
Amount: $69,746.00
Phase: Phase I
Program: STTR
Awards Year: 2007
Solicitation Year: 2007
Solicitation Topic Code: N07-T022
Solicitation Number: N/A
Small Business Information
2425 South 900 West, Salt Lake City, UT, 84119
DUNS: 089500540
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: Y
Principal Investigator
 John Watkins
 Senior Scientist
 (801) 978-2182
Business Contact
 Raymond Miller
Title: CFO/Secretary
Phone: (801) 978-2176
Research Institution
 Jun J Xu
 Dept. of Materials Science
and Engineering
Piscataway,, NJ, 8854
 (732) 445-5606
 Nonprofit college or university
A pressure tolerant, neutrally buoyant, high-energy density battery is proposed that utilizes a Li+ conducting, solid-electrolyte separator, LiSICON. The LiSICON ceramic is fabricated using state of the art tape casting methods which allows composite structures of porous and dense layers ~100mm thick. The layered structure increase mechanical strength and decrease interfacial and bulk resistances. The high-energy cathode material, amorphous MnO2 or nano-crystalline LiMn1/3Ni1/3Co1/3O2, allow a predicted energy density >400 Whr/kg for the overall battery. The use of a lightweight lithium metal anode results in a battery with an estimated specific gravity approaching 1. The pressure tolerant battery design allows the case to preferentially deform to compensate for increasing pressure and also accounts for the internal volume change during battery discharge. The solid electrolyte separator prevents lithium dendrites from shorting the battery during recharge significantly increasing the safety margin, inherent in alkali metal batteries.

* information listed above is at the time of submission.

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