Chelation treatment for reduced self-discharge in Li-ion batteri

Details Chelation treatment for reduced self-discharge in Li-ion batteri Chelation treatment for reduced self-discharge in Li-ion batteri

1996-05-09

1997-12-09

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Preserving cell in storage feature

429137, 296235, 427220, H01M 214

Patent

active

056958870

ABSTRACT:
The extent of self-discharge of rechargeable Li-ion secondary batteries is significantly reduced by treatment of LiMn.sub.2 O.sub.4 intercalation compound electrode material with a chelating agent, such as acetylacetone. This treatment decreases the incidence of non-coordinated Mn-ion sites which can lead to battery electrolyte decomposition and resulting loss of battery capacity. The treatment, which also includes annealing at about 400.degree. C. to 800.degree. C., further prevents such decomposition by varying the surface area and topography of the potentially catalytic electrode material.

REFERENCES:
patent: 5082811 (1992-01-01), Bruno
patent: 5192629 (1993-03-01), Guyomard et al.
patent: 5425932 (1995-06-01), Tarascon
patent: 5460904 (1995-10-01), Gozdz
patent: 5547778 (1996-08-01), Fauteux et al.

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