Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode
Patent
1997-07-02
2000-05-02
Kalafut, Stephen
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Electrode
429331, 429332, 429333, 429338, H01M 450
Patent
active
06057058&
ABSTRACT:
The invention provides a lithium secondary battery with improved withstanding overcharge and overdischarge characteristics which employs a cathode active material of lithium-containing manganese dioxide having a crystal structure of the Ramsdellite-type. An electrolyte combined with the cathode includes LiN(CF.sub.3 SO.sub.2).sub.2 as a solute. The solute is preferably dissolved in ethylene carbonate. A graphite or LiAl alloy is applied for an anode. LiAl alloy is corrosion-resistant, thereby improving high temperature as well as charge-discharge cycle life characteristics.
REFERENCES:
patent: 5021308 (1991-06-01), Armand et al.
patent: 5389467 (1995-02-01), Herr et al.
patent: 5443929 (1995-08-01), Yamamoto et al.
patent: 5506078 (1996-04-01), Davidson et al.
patent: 5532084 (1996-07-01), Wang et al.
Patent Abstracts of Japan, vol. 096, No. 006, Jun. 28, 1996 & JP 08 031452 A (Matsuhita Electric Ind. Co., Ltd.) Feb. 2, 1996 (abstract).
Thackeray, M., et al.: "Ramsdellite-MN02 For Lithium Batteries: The Ramsdellite To Spinel Transformation" Electrochimica Acta, vol. 38, No. 9, Jun. 1, 1993, pp. 1259-1267, XP000380769 pp. 1260-1266.
Asaka Emi
Kakinuma Akira
Koshiba Nobuharu
Mori Tatsuo
Kalafut Stephen
Matsushita Electric - Industrial Co., Ltd.
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