Positive electrode and non-aqueous electrolyte cell

Details Positive electrode and non-aqueous electrolyte cell Positive electrode and non-aqueous electrolyte cell

H - Electricity

01

M

H01M 4/36 (2006.01) C01B 25/45 (2006.01) H01M 4/24 (2006.01) H01M 10/24 (2006.01) H01M 4/40 (2006.01) H01M 4/58 (2006.01) H01M 4/48 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2344981

A lithium ion cell less costly than a control lithium ion cell is provided. The lithium ion cell is improved appreciably in operational stability under special conditions, such as high temperatures, and exhibits superior characteristics against over-discharging, while guaranteeing compatibility to the operating voltage of a conventional lithium ion cell and an energy density equivalent to that of the conventional lithium ion cell. To this end, the lithium ion cell includes a positive electrode, a negative electrode and a non-aqueous electrolyte, and uses, as a positive electrode active material, a composite material of a first lithium compound represented by the general formula Li x M y PO4, where 0 <x< 2, 0.8 <y< 1.2 and M contains Fe, and a second lithium compound having a potential holder than the potential of the first lithium compound.

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