Nonaqueous secondary battery
AssigneeFuji Photo Film Co., Ltd.
InventorsHiroshi Fujimoto, Yasuo Aotsuka
Life of this patent
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Abstract
A nonaqueous secondary battery comprising positive and negative sheet electrodes, each composed of a collector coated with an electrode material mixture containing the respective active material and a nonaqueous electrolyte containing a lithium salt, wherein the electrode material mixture is present on both the inner and the outer sides of the collector and the coating thickness of the electrode material mixture on the inner side of the collector of the positive and/or negative electrode(s) is smaller than that of the electrode material mixture on the outer side of said collector. The battery is excellent in charge and discharge cycle characteristics, and the sheet electrodes have excellent winding properties when rolled up into cylinders.
Claims11
A nonaqueous secondary battery comprising positive and negative sheet electrodes, each composed of a collector coated with an electrode material mixture containing the respective active material and a nonaqueous electrolyte containing a lithium salt, wherein the electrode material mixture is present on both the inner and the outer sides of the collector and the coating thickness of the electrode material mixture on the inner side of the collector of the positive electrode is smaller than that of the electrode material mixture on the outer side of said collector, and wherein the negative electrode active material of the battery is capable of intercalating and deintecalating lithium and contains a composition mainly comprising at least one of an amorphous chalcogen compound and an amorphous oxide compound containing at least two elements selected from the groups IIIA, IVA and VA of the periodic table.
A process for charging a nonaqueous secondary battery, wherein said nonaqueous secondary battery is charged and discharged at a current having 500 mA to 6 A, wherein said nonaqueous secondary battery comprises positive and negative sheet electrodes, each composed of a collector coated with an electrode material mixture containing the respective active material and a nonaqueous electrolyte containing a lithium salt, wherein the electrode material mixture is present on both the inner and the outer sides of the collector and the coating thickness of the electrode material mixture on the inner side of the collector of the positive electrode is smaller than that of the electrode material mixture on the outer side of said collector, and wherein the negative electrode active material of the battery contains a composition capable of intercalating and deintercalating lithium and mainly comprising at least one of an amorphous chalcogen compound and an amorphous oxide compound containing at least two elements selected from the groups IIIA, IVA and VA of the periodic table.
Dependencies are inferred from the claim text.