Active materials for a secondary cell, a method for making the s

Details Active materials for a secondary cell, a method for making the s Active materials for a secondary cell, a method for making the s

1996-09-20

1998-08-04

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

427122, 427197, 427215, H01M 462

Patent

active

057891141

ABSTRACT:
An active material for a positive electrode of a secondary cell comprises particles of a metal oxide and a conductive layer formed on the surfaces of individual particles of the metal oxide and made of a carbon powder which has a specific surface area of at least 150 m.sup.2 /g when measured prior to the formation of the conductive layer. The conductive layer covers at least 15% of an apparent surface of the individual particles of the metal oxide and has a thickness ranging from 0.01 .mu.m to 0.3 .mu.m. The active material has a specific surface area of 3.5 m.sup.2 /g to 100 m.sup.2 /g. A method for making the active material is also described along with a positive electrode comprising the active material and a non-aqueous electrolytic secondary cell comprising the positive electrode.

REFERENCES:
patent: 3042732 (1962-07-01), Kordesch
patent: 5441833 (1995-08-01), Furukawa
patent: 5482797 (1996-01-01), Yamada et al.
patent: 5503946 (1996-04-01), Fauteux et al.

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