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US 5,478,671 AGranted
Nonaqueous secondary battery
AssigneeFuji Photo Film Co., Ltd.
InventorYoshio Idota
Life of this patent
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Abstract
A nonaqueous secondary battery comprises an anode active material, a cathode active material and a nonaqueous electrolyte. The anode active material is a transition metal oxide of which an inherent crystal structure has been changed by insertion of lithium ions, and is in the condition that the changed crystal structure is not changed during repeated charging and discharging.
Claims18
A nonaqueous secondary battery which comprises an anode active material, a cathode active material and a nonaqueous electrolyte;
- wherein said anode active material is a transition metal oxide comprising lithium ions, and wherein an inherent crystal structure of the anode active material has been changed by insertion of the lithium ions, and is in the condition that said changed crystal structure is essentially not changed during repeated charging and discharging.
Dependencies are inferred from the claim text.