NASA 1996 SBIR Phase I


PROPOSAL NUMBER : 96-1 07078013

PROJECT TITLE : Improved Thin Film Polymer Electrolyte for Lithium Batteries

TECHNICAL ABSTRACT (LIMIT 200 WORDS)

Lithium polymer batteries offer a combination of advantages not found in any other battery systems. In particular, lithium batteries offer high electronegativity and light weight, while polymer electrolytes offer safer and more rugged batteries at even lighter weights. Polymer mixed with high weight percent of solvent will create a more highly conductive gel. Using a thin film geometry will maximize the surface area to volume ratio of the electrodes and will increase the cathode efficiency as well as lower the packaging weight. A conducive electrolyte gel, that is conducive to thin film processing is to be developed. The materials proposed are fire resistant and the low temperature performance (to -20o C) is expected to exhibit excellent conductivities (10-4 ). Benefits to the space program will include more compact batteries with increased energy densities, estimated at 200 Wh/kg, through more efficient utilization of battery components (cathode and electrolyte). Phase II of this work will involve making multilayer stacks of thin film batteries (in situ). This will offer advantages of decreasing the relative packaging weight per battery as well as specifically fit voltages (multiples of the bases cell), as well as increased power density through parallel cell construction.
POTENTIAL COMMERCIAL APPLICATIONS
A thin film electrolyte, of approximately 1 micron thick, that may be applied in the form of a thin film battery have enormous commercial applications in the electronic industry by supplying chips with onboard power supplies. By making the electrolyte thin, a battery several microns thick may be mass produced and made with a minimum penalty in weight and size yielding higher energy densities.
NAME AND ADDRESS OF PRINCIPAL INVESTIGATOR
Trey Huntoon
Sigma Labs
10960 N. Stallard Pl.
Tucson AZ. 8574
NAME AND ADDRESS OF OFFEROR