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Nonaqueous electrolyte secondary battery

A non-aqueous electrolyte, secondary battery technology, used in secondary batteries, battery electrodes, circuits, etc.

Inactive Publication Date: 2010-07-28
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The inventors of the present invention conducted various experiments in order to solve the above-mentioned problems when using two types of positive electrode active materials with different average particle diameters to form a high-density packed positive electrode.

Method used

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  • Nonaqueous electrolyte secondary battery

Examples

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Embodiment Construction

[0031] The best mode for carrying out the present invention will be described in detail below using Examples and Comparative Examples. Among them, the embodiment shown below is an example embodiment of a non-aqueous electrolyte secondary battery for embodying the technical idea of ​​the present invention. The present invention is not limited by this embodiment. The present invention can be applied even when various changes are made based on technical ideas.

[0032] [Production of positive electrode active material]

[0033] First, a specific method of manufacturing a non-aqueous electrolyte secondary battery common to each of the Examples and Comparative Examples will be described. The positive electrode active material uses lithium cobalt oxide containing zirconium (Zr) and magnesium (Mg) (LiCoO containing Zr and Mg) 2 ). The LiCoO containing Zr and Mg was prepared as follows 2 . First, as a starting material, the lithium source uses lithium carbonate (Li 2 CO 3 ). T...

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Abstract

The nonaqueous electrolyte secondary battery uses a positive electrode active material which is a mixture of large particle diameter-positive electrode active material particles having a central particle diameter D50 of 15 to 30 [mu]m and small particle diameter-positive electrode active material particles having a central particle diameter D50 of 1 to 8 [mu]m, in which the particle size distribution has a peak having a relative particle amount of 5% or more in each of a particle diameter range of 15 to 30 [mu]m and a particle diameter range of 1 to 8 [mu]m, and the nonaqueous electrolyte contains 1,3-dioxane, a vinylene carbonate compound, and at least one type of aromatic compound selected from a cycloalkylbenzene compound and a compound having a quaternary carbon adjacent to a benzene ring, thus having high safety when overcharged, a large initial capacity and excellent charging-discharging cycle characteristics and generating less gas.

Description

technical field [0001] The present invention relates to a non-aqueous electrolyte secondary battery, in particular, by using a variety of positive electrode active material materials with different particle size distributions and adding specific additives to the non-aqueous electrolyte at the same time, so that the safety during overcharging is high and the initial capacity is high. A non-aqueous electrolyte secondary battery that is large, has excellent charge-discharge cycle characteristics, and generates little gas. Background technique [0002] As the driving power of today's portable electronic devices such as mobile phones, portable personal computers, and portable music players, and as a power source for hybrid electric vehicles (HEV) or electric vehicles (EV), widely used high energy density, It is a high-capacity non-aqueous electrolyte secondary battery represented by a lithium-ion secondary battery. Among them, a nonaqueous electrolyte secondary battery using gra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M4/36H01M10/056
CPCH01M10/0567Y02E60/122H01M2004/028H01M10/0525Y02T10/7011H01M2004/021Y02E60/10Y02T10/70
Inventor 池田喜彦森本卓弥猪俣秀行
Owner SANYO ELECTRIC CO LTD
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