Lithium battery
AssigneesToda Kogyo Corporation, Matsushita Electric Industrial Co., Ltd.
InventorsKazunori Takada, Shigeo Kondo, Ryoji Kanno, Tatsuya Nakamura, Mikio Takano
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Abstract
The present invention related to a lithium battery comprising a pair of electrodes disposed by means of a separator in the presence of a lithium ion conductive electrolyte, wherein at least one of said electrodes comprises a lithium iron oxide having a corrugated layer crystal structure and represented by the formula (1): Lix(Fe(1−y)My)O2 (1) wherein M represents at least one element selected from the group consisting of cobalt, nickel, manganese and aluminum, x is more than 0 and less than 2, and y is 0.005 to 0.1, Which has improved battery characteristics, an excellent cycle life and a higher electric current operated.
Claims5
A lithium battery comprising a pair of electrodes disposed by means of a separator in the presence of a lithium ion conductive electrolyte, wherein at least one of said electrodes comprises lithium iron oxide having a corrugated layer structure when examined by x-ray diffraction, the lithium iron oxide doped with at least one additional metal and produced by heating a mixture of lepidocrocite and a lithium compound at a temperature of 100 to 150° C., and after washing the reaction product with water, filtering off and drying, heat-treating the obtained product at a temperature of 100 to 250° C.
A lithium battery comprising a pair of electrodes disposed by means of a separator in the presence of a lithium ion conductive electrolyte,
- wherein at least one of said electrodes comprises lithium iron oxide which has a corrugated layer crystal structure when examined by x-ray diffraction, which lithium iron oxide is represented by the formula (1):
- Lix(Fe(1−y)My)O2 (1):
- wherein M represents at least one element selected from the group consisting of cobalt, nickel, manganese and aluminum, x is more than 0 and less than 2, and y is 0.005 to 0.1, and which is produced by heating a mixture of lepidocrocite containing at least one element selected from the group consisting of cobalt, nickel, manganese and aluminum and a lithium compound at a temperature of 100 to 150° C., wherein the mixing ratio (Li/Fe) of lepidocrocite and the lithium compound is not less than 1.2.
Dependencies are inferred from the claim text.