Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode
Patent
1995-04-20
1997-01-07
Maples, John S.
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Electrode
429194, 429224, 429156, H01M00450
Patent
active
055915469
ABSTRACT:
The present invention provides nonaqueous electrolyte secondary cells capable of withstanding severe overdischarge to obtain nonaqueous electrolyte secondary batteries having satisfactory cycle characteristics. A spinel-type lithium-containing metallic oxide represented by LiM.sub.2 O.sub.4 (where M is a transitional metal element) is used as an active substance for each of the positive and negative electrodes of the cell embodying the invention. In an organic electrolyte containing lithium ion, the spinel-type lithium-containing metallic oxide represented by LiM.sub.2 O.sub.4 is capable of reversibly undergoing an electrochemical oxidation reaction involving removal of doping lithium ion and also an electrochemical reduction reaction involving lithium ion doping. Accordingly, when the cell of the invention is overdischarged (.apprxeq. reversibly charged), a reversible reaction involving lithium ion doping/undoping occurs at the positive electrode and negative electrode without entailing any damage due to overdischarge. As a result, when many cells are connected in series to obtain a battery, the cycle characteristics of the battery are not impaired even if the component cells are different in capacity.
REFERENCES:
patent: 4366215 (1982-12-01), Coetzer et al.
patent: 5162178 (1992-11-01), Ohsawa et al.
patent: 5284721 (1994-02-01), Beard
Hival Ltd.
Maples John S.
LandOfFree
Secondary cell does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Secondary cell, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Secondary cell will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1762868