Battery active material, nonaqueous electrolyte battery and battery pack

A non-aqueous electrolyte and active material technology, applied in non-aqueous electrolyte batteries, active material electrodes, battery electrodes, etc., can solve problems such as capacity reduction

Active Publication Date: 2012-07-04
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is considered to be because there are few sites for inserting lithium in the crystal structure of t...

Method used

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  • Battery active material, nonaqueous electrolyte battery and battery pack
  • Battery active material, nonaqueous electrolyte battery and battery pack
  • Battery active material, nonaqueous electrolyte battery and battery pack

Examples

Experimental program
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Effect test

no. 1 Embodiment approach

[0024] The battery active material of the first embodiment can be used in a nonaqueous electrolyte secondary battery. The active substance contains the formula Li x Ti 1-y M1 y Nb 2-z M2 z o 7+δ A monoclinic composite oxide represented by (0≤x≤5, 0≤y≤1, 0≤z≤2, -0.3≤δ≤0.3). In the formula, the M1 is at least one selected from Zr, Si and Sn, and the M2 is at least one selected from V, Ta and Bi.

[0025] Such a monoclinic composite oxide has 1.5 V (vs. Li / Li + ) around the lithium intercalation potential, therefore, can be stably repeated rapid charge and discharge.

[0026] as formula Li x Ti 1-y M1 y Nb 2-z M2 z o 7+δ Examples of monoclinic composite oxides shown include monoclinic TiNb 2 o 7 . figure 1 and figure 2 A schematic diagram of its crystal structure is shown in .

[0027] Such as figure 1 As shown, in the monoclinic TiNb 2 o 7 In the crystal structure of , metal ions 101 and oxide ions 102 constitute a skeleton structure 103 . In addition, as ...

no. 2 Embodiment approach

[0059] In the second embodiment, there is provided a non-aqueous electrolyte battery including: a negative electrode containing the battery active material in the first embodiment, a positive electrode, a non-aqueous electrolyte, a separator, and an outer packaging member.

[0060] Hereinafter, the negative electrode, the positive electrode, the non-aqueous electrolyte, the separator, and the exterior member will be described in detail.

[0061] 1) Negative electrode

[0062] The negative electrode includes a current collector and a negative electrode layer (a layer containing a negative electrode active material). The negative electrode layer is formed on one or both surfaces of the current collector, and contains an active material, an optional conductive agent, and a binder.

[0063] As the negative electrode active material, the formula Li described in the first embodiment can be used x Ti 1-y M1 y Nb 2-z M2 z o 7+δ A monoclinic composite oxide represented by (0≤x≤5...

no. 3 Embodiment approach

[0116] Next, a battery pack according to a third embodiment will be described with reference to the drawings. The battery pack includes one or more nonaqueous electrolyte batteries (single cells) according to the second embodiment described above. When a plurality of cells are included, the cells are arranged by being electrically connected in series or in parallel.

[0117] Figure 7 and Figure 8 An example of the battery pack 20 is shown in . The battery pack 20 contains multiple image 3 A flat battery 21 of the structure shown. Figure 7 is an exploded perspective view of the battery pack 20, Figure 8 yes means Figure 7 A block diagram of the electrical circuit of the battery pack 20.

[0118] The plurality of single cells 21 are stacked so that the negative terminal 6 and the positive terminal 7 extending outward are directed in the same direction, and are bound with an adhesive tape 22 to form a battery pack 23 . These cells 21 as Figure 8 The shown mutuals ...

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Abstract

The invention provides a battery active material. The battery active material includes monoclinic complex oxide represented by the formula Li x Ti 1-y M1 y Nb 2-z M2 z O 7+ Delta (0 <= x <= 5, 0 <= y <= 1, 0 <= z <= 2, -0.3 <= Delta <= 0.3). In the above formula, M1 is at least one element selected from the group consisting of Zr, Si and Sn, and M2 is at least one element selected from the group consisting of V, Ta and Bi.

Description

technical field [0001] The aspects disclosed in the present invention generally relate to an active material for a battery, a nonaqueous electrolyte battery and a battery pack using the same. Background technique [0002] In recent years, nonaqueous electrolyte secondary batteries using lithium ions have been developed. Non-aqueous electrolyte secondary batteries using lithium ions have high energy density, and are expected to be used as power sources for hybrid vehicles, electric vehicles, and uninterruptible power supplies for mobile phone base stations. Therefore, other characteristics such as rapid charge and discharge characteristics and long-term reliability are also required for this nonaqueous electrolyte secondary battery. For example, non-aqueous electrolyte secondary batteries that can be quickly charged and discharged can greatly shorten the charging time, and can also improve the power performance of hybrid vehicles and the like and effectively recover the rege...

Claims

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Application Information

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IPC IPC(8): H01M4/485H01M10/05H01M10/0525
CPCC01G23/002H01M2004/027Y02E60/122C01P2002/72Y02T10/7011H01M4/131H01M10/0525C01P2006/40C01P2002/52H01M2004/021H01M4/485C01G23/003Y02E60/10C01G33/00C01G33/006C01P2002/77
Inventor 原田康宏高见则雄稻垣浩贵吉田赖司
Owner KK TOSHIBA
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