Non-aqueous electrolyte secondary cell

A non-aqueous electrolyte, secondary battery technology, applied in non-aqueous electrolyte storage batteries, secondary batteries, electrolytes, etc., can solve the problem of not giving an example of using silicon, and achieve small expansion, long cycle life, and low gas generation. Effect

Active Publication Date: 2015-04-08
PANASONIC ENERGY CO LTD MORIGUCHI SHI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, although the following patent documents 2 and 3 also mention that silicon and the like can be used as the negative electrode active material, no specific example of using silicon or the like is given at all.

Method used

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Embodiment Construction

[0027] Embodiments for carrying out the present invention will be described in detail below. However, the embodiments shown below are merely examples for understanding the technical idea of ​​the present invention, and do not mean that the present invention is limited to the embodiments. Various changes carried out under the premise of the idea can all apply the present invention in the same way. First, a method for manufacturing the rectangular nonaqueous electrolyte secondary battery used in Experimental Examples 1 to 6 will be described.

[0028] [Production of positive plate]

[0029] The positive electrode plate was produced as follows. As a cobalt source, when synthesizing cobalt carbonate, 0.1 mol% of zirconium (Zr) and 1 mol% of magnesium (Mg) and aluminum (Al) are co-precipitated for cobalt, and they are thermally decomposed to obtain a compound containing zirconium and magnesium. and aluminum cobalt tetroxide. Combine it with lithium carbonate (Li 2 CO 3 ) mixe...

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Abstract

A non-aqueous electrolyte secondary cell according to an embodiment of the present invention is provided with a positive electrode provided with a positive electrode active material for absorbing and releasing lithium ions, a negative electrode having a negative electrode active material for absorbing and releasing lithium ions, a separator, and a non-aqueous electrolyte, the positive electrode active material containing a lithium-cobalt composite oxide containing at least aluminum (Al) and magnesium (Mg), the negative electrode active material containing metal silicon (Si) and / or silicon oxide represented by SiOx (where 0.5 ≤ x < 1.6), and the non-aqueous electrolyte containing ethylene carbonate, a lactone, and fluoroethylene carbonate, as non-aqueous solvents.

Description

technical field [0001] The present invention relates to a non-aqueous electrolyte secondary battery having good battery characteristics even when the end-of-charge voltage is increased. Background technique [0002] Nonaqueous electrolyte secondary batteries represented by lithium-ion batteries are widely used as drive power sources for portable electronic devices such as smartphones, portable computers, PDAs, and portable music players. In addition, it is used as a driving power source for electric vehicles (EV) or hybrid electric vehicles (HEV, PHEV), for suppressing output fluctuations in solar power generation, wind power generation, etc., or as system power for storing power at night and using it during the day. Non-aqueous electrolyte secondary batteries are also increasingly used in stationary storage battery systems such as peak travel applications. [0003] Among them, especially because various battery characteristics are superior to other batteries, more lithium-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/052H01M4/38H01M4/48H01M4/525H01M10/0567H01M10/0569
CPCH01M2300/0034H01M2300/0037H01M10/0567Y02E60/122H01M4/525H01M10/0569Y02T10/7011H01M10/0525H01M4/386H01M2004/027H01M2004/028Y02E60/10Y02T10/70
Inventor 贝塚笃史岩永征人
Owner PANASONIC ENERGY CO LTD MORIGUCHI SHI
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