Invention Grant
- Patent Title: Non-aqueous electrolyte secondary battery with high capacity and good life characteristics
- Patent Title (中): 非水电解质二次电池具有容量大,寿命长的特点
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Application No.: US11795801Application Date: 2006-03-23
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Publication No.: US08435675B2Publication Date: 2013-05-07
- Inventor: Takayuki Shirane , Takashi Takeuchi , Takaya Saito
- Applicant: Takayuki Shirane , Takashi Takeuchi , Takaya Saito
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: McDermott Will & Emery LLP
- Priority: JP2005-114787 20050412
- International Application: PCT/JP2006/305862 WO 20060323
- International Announcement: WO2006/109495 WO 20061019
- Main IPC: H01M4/13
- IPC: H01M4/13

Abstract:
Disclosed is a non-aqueous electrolyte secondary battery comprising a positive electrode containing a nickel-containing lithium composite oxide, a negative electrode containing graphite, and a non-aqueous electrolyte. The cut-off voltage of charge of this non-aqueous electrolyte secondary battery is 4.25 to 4.6 V. The negative electrode contains an additive that reacts with lithium at a potential higher than the potential of graphite. The ratio A/B of a positive electrode capacity A based on the weight of the nickel-containing lithium composite oxide and the cut-off voltage of charge relative to a weight B of the graphite contained in a portion of a negative electrode material mixture layer opposing to a positive electrode material mixture layer is 300 to 340 mAh/g, and the irreversible capacity C of the positive electrode and the irreversible capacity D of the negative electrode in the portion opposing to the positive electrode satisfies C≧D.
Public/Granted literature
- US20080118837A1 Non-Aqueous Electrolyte Secondary Battery Public/Granted day:2008-05-22
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