Silica electrolyte element for secondary lithium battery

Details Silica electrolyte element for secondary lithium battery Silica electrolyte element for secondary lithium battery

1991-12-03

1993-03-16

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

429194, 429247, H01M 216

Patent

active

051943417

ABSTRACT:
A film of linear organosilsesquioxane polymer, or "ladder" organosiloxane, coated upon the surface of a LiMn.sub.2 O.sub.4 secondary battery electrode 19 and cured to a glassy layer is subjected to plasma oxidation to remove pendant organic groups comprising the coated polymer. The resulting ultrathin silica separator layer 17 is replete with minute pores which take up and retain by capillarity a typical LiClO.sub.4 electrolyte solution. A counter-electrode 15 placed in intimate contact with the silica electrolyte element completes a secondary battery structure 10 in which lithium ions readily migrate through the electrolyte during repeated discharge/charge cycles without loss of element integrity or efficacy.

REFERENCES:
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patent: 4122041 (1978-10-01), Mahler
patent: 4751159 (1988-06-01), Tarascon
patent: 4828834 (1989-05-01), Nagaura et al.
patent: 4937156 (1990-06-01), Boeller et al.
"New Positive-electrode Materials for Lithium Thin Film Secondary Batteries*", G. Meunier et al., Materials Science and Engineering B3, 1989, 19-23.
"Dielectric and High Tc Superconductor Applications of Sol-Gel and Modified Sol-Gel Processing to Microelectronics Technology", B. G. Bagley et al., Journal of Non-Crystalline Solids, 121, 1990, 454-462.
"Electrochemistry of Manganese Dioxide in Lithium Nonaqueous Cell", Tsutomu Ohzuku et al., J. Electrochem. Soc., 137, 1990, 40-46.

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