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AssigneeNEC Corporation
InventorsHiroshi Yageta, Tatsuji Numata, Chika Kanbe, Akira Kobayashi, Masato Shirakata, Masatomo Yonezawa
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A secondary battery including an electricity Generating element, which includes at least a positive electrode implemented by a lithium-manganese compound oxide, a negative electrode, an electrolyte and a separator, and films encasing the electricity generating element is disclosed. The secondary battery further includes a composition causing the electrolyte to react with water to thereby produce hydrogen ions, and a hydrogen ion uptaking agent so positioned as to contact the electrolyte existing in the battery. The battery is desirable in charge-discharge cycle characteristic, storage characteristic, and safety. In addition, the battery swells little despite a repeated charge-discharge cycle or storage.
In a nonaqueous electrolyte type secondary battery comprising an electricity generating element, which includes at least appositive electrode implemented by a lithium-manganese compound oxide, a negative electrode, an electrolyte and a separator, and films encasing said electricity generating element, a composition causing said electrolyte to react with water to thereby produce hydrogen ions is provided, and a hydrogen ion uptaking agent is so positioned as to contact said electrolyte existing in said secondary battery.
Dependencies are inferred from the claim text.