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Active material, nonaqueous electrolyte battery, battery pack and vehicle

A non-aqueous electrolyte and active material technology, applied in the direction of active material electrodes, battery electrodes, batteries, etc., can solve the problem of low electronic conductivity and achieve excellent input and output characteristics

Active Publication Date: 2017-08-04
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the titanium composite oxide itself has low electron conductivity, it is considered to coat the titanium composite oxide with carbon or use a non-aqueous electrolyte with high lithium ion conductivity in order to obtain high input and output characteristics.

Method used

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  • Active material, nonaqueous electrolyte battery, battery pack and vehicle
  • Active material, nonaqueous electrolyte battery, battery pack and vehicle
  • Active material, nonaqueous electrolyte battery, battery pack and vehicle

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0031] According to the first embodiment, an active material for a battery is provided. This battery active material contains secondary particles. Secondary particles include first primary particles and second primary particles. The first primary particle contains an orthorhombic Na-containing niobium-titanium composite oxide. The second primary particles contain at least one selected from carbon black, graphite, titanium nitride, titanium carbide, spinel lithium titanate, anatase titanium dioxide, and rutile titanium dioxide.

[0032] The average working potential of the orthorhombic Na-niobium-titanium composite oxide contained in the first primary particle can be 1.2-1.4V (vs.Li / Li + ). This working potential is a low value even in titanium composite oxides. Therefore, the battery active material according to the first embodiment containing the orthorhombic Na-containing niobium-titanium composite oxide can realize a nonaqueous electrolyte battery capable of exhibiting ...

no. 2 Embodiment approach

[0149] According to the second embodiment, there is provided a nonaqueous electrolyte battery. The nonaqueous electrolyte battery includes a negative electrode, a positive electrode, and a nonaqueous electrolyte. The negative electrode contains the battery active material according to the first embodiment.

[0150] The nonaqueous electrolyte battery according to the second embodiment may further include a separator disposed between the positive electrode and the negative electrode. The positive electrode, the negative electrode and the separator can constitute an electrode group. A non-aqueous electrolyte may be held in the electrode group.

[0151] In addition, the non-aqueous electrolyte battery according to the second embodiment may further include an exterior member for accommodating the electrode group and the non-aqueous electrolyte.

[0152] In addition, the non-aqueous electrolyte battery according to the second embodiment may further include a positive terminal ele...

no. 3 Embodiment approach

[0209] According to a third embodiment, a battery pack is provided. This battery pack includes the nonaqueous electrolyte battery according to the second embodiment.

[0210] The battery pack according to the third embodiment may include one or more non-aqueous electrolyte batteries (single cells) according to the second embodiment. A plurality of nonaqueous electrolyte batteries can be electrically connected in series, parallel, or a combination of series and parallel to form a battery pack. The battery pack according to the third embodiment may include a plurality of assembled batteries.

[0211] The battery pack according to the third embodiment may further include a protection circuit. The protection circuit has a function of controlling charge and discharge of the nonaqueous electrolyte battery. Alternatively, a circuit included in a device that uses a battery pack as a power source (for example, an electronic device, an automobile, etc.) may be used as a protection ci...

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Abstract

According to one embodiment, there is provided an active material. The active material includes secondary particles. The secondary particles include first primary particles and second primary particles. The first primary particles include an orthorhombic Na-containing niobium-titanium composite oxide. The second primary particles include at least one selected from the group consisting of a carbon black, a graphite, a titanium nitride, a titanium carbide, a lithium titanate having a spinel structure, a titanium dioxide having an anatase structure, and a titanium dioxide having a rutile structure.

Description

technical field [0001] Embodiments of the present invention relate to an active material for batteries, a nonaqueous electrolyte battery, and a battery pack. Background technique [0002] Non-aqueous electrolyte batteries, in which lithium ions are charged and discharged by moving between the negative electrode and the positive electrode, have been extensively researched as high-energy-density batteries. [0003] This non-aqueous electrolyte battery is expected to be used as a large and medium-sized power source such as in-vehicle use and stationary use, in addition to its use as a power source for small electronic devices. In such large and medium-sized applications, non-aqueous electrolyte batteries are required to have life characteristics and high safety. In addition, high input-output characteristics of the non-aqueous electrolyte battery are also required. [0004] An example of a nonaqueous electrolyte battery having life characteristics and high safety includes a n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/62H01M10/0525
CPCH01M4/362H01M4/485H01M4/625H01M10/0525H01M2220/20H01M2004/027C01G33/006C01G35/006C01G39/006C01G45/1221C01G49/009C01G51/42C01P2002/76C01P2004/61H01M4/364H01M4/131Y02E60/10
Inventor 保科圭吾原田康宏高见则雄
Owner KK TOSHIBA
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