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Nonaqueous electrolyte secondary battery

A non-aqueous electrolyte, secondary battery technology, applied in non-aqueous electrolyte batteries, secondary batteries, battery electrodes, etc., can solve the problem of high gas production, and achieve the effect of high input and output characteristics and low gas production.

Inactive Publication Date: 2018-09-28
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the case of using a carbon-based negative electrode active material in a battery using lithium titanate, for example, when the battery is charged and discharged at a high temperature, there is a large amount of gas generated when stored at a high temperature. topic

Method used

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  • Nonaqueous electrolyte secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] [Production of positive electrode active material]

[0060] [Ni 0.50 co 0.20 mn 0.30 ](OH) 2 The hydroxides shown were calcined to obtain nickel-cobalt-manganese composite oxides. Then, the total amount of Li, Ni, Co, Mn and WO 3 The molar ratio of W in the mixture is 1.2:1:0.005 and lithium carbonate, the above-mentioned nickel-cobalt-manganese composite oxide and tungsten oxide (WO 3 ). The mixture was heat-treated and pulverized at 900°C for 20 hours in an air atmosphere, thereby obtaining Li in which W was solid-dissolved. 1.07 [Ni 0.465 co 0.186 mn 0.279 W 0.005 ]O 2 Lithium transition metal oxide (cathode active material) shown. The obtained composite oxide powder was observed with a scanning electron microscope (SEM), and it was confirmed that unreacted tungsten oxide did not remain.

[0061] [making of positive electrode]

[0062] The above-mentioned positive electrode active material, acetylene black, and polyvinylidene fluoride were mixed at a ma...

Embodiment 2

[0072] The lithium transition metal oxide and tungsten oxide (WO) of Example 1 were mixed using a Hivis Disper mixer (PRIMIX). 3 ), fabricated WO attached on the surface of lithium transition metal oxide 3 positive active material. At this time, metal elements (Ni, Co, Mn, W) other than Li in lithium transition metal oxides and WO 3 The molar ratio of W was mixed in such a way that the ratio was 1:0.005. Added WO when making positive electrode active material 3 A battery A2 was produced in the same manner as in Example 1 except that. It should be noted that, as a result of observing the obtained positive electrode composite material layer by SEM, it was confirmed that tungsten oxide particles with an average particle diameter of 150 nm adhered to the particle surface of the lithium transition metal oxide.

Embodiment 3

[0074] Lithium phosphate (Li 3 PO 4 ) mixture, acetylene black and polyvinylidene fluoride to make positive electrode composite material slurry. Lithium phosphate (Li 3 PO 4 ) was added in an amount of 2% by mass relative to the active material. Added Li when making positive electrode 3 PO 4 A battery A3 was produced in the same manner as in Example 2 except that.

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Abstract

A nonaqueous electrolyte secondary battery wherein a positive electrode mixture layer of a positive electrode contains a lithium transition metal oxide that contains at least nickel (Ni), cobalt (Co),manganese (Mn) and tungsten (W). A negative electrode mixture layer of a negative electrode contains lithium titanate and a group 5 / 6 oxide that is an oxide containing at least one element selected from among group 5 elements and group 6 elements.

Description

technical field [0001] The present invention relates to a nonaqueous electrolyte secondary battery. Background technique [0002] In recent years, lithium titanate, which has excellent stability even at high potential, has attracted attention as a negative electrode active material for nonaqueous electrolyte secondary batteries. For example, Patent Document 1 discloses a nonaqueous electrolyte secondary battery using lithium titanate as a negative electrode active material. However, compared with the case of using a carbon-based negative electrode active material in a battery using lithium titanate, for example, when the battery is charged and discharged at a high temperature, there is a large amount of gas generated when stored at a high temperature. topic. [0003] Patent Document 1 describes: as the main active material of the negative electrode, an active material that intercalates and deintercalates lithium ions at a potential of 1.2 V or higher relative to the lithiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M4/131H01M4/36H01M4/485H01M4/505H01M4/525H01M4/62
CPCH01M4/131H01M4/485H01M4/505H01M4/525H01M4/62H01M10/0525Y02E60/10H01M4/364H01M10/05
Inventor 杉森仁德续木康平柳田胜功
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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