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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 small-sized batteries/battery packs, battery electrodes, batteries, etc., can solve the problems of short charge and discharge life and low practical capacity, and achieve high energy density, long life performance, The effect of excellent fast charge and discharge performance

Active Publication Date: 2017-07-04
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, TiNb 2 o 7 The composite oxide shown has a high theoretical capacity exceeding 380mAh / g, but the TiNb 2 o 7 The practical capacity of the electrode is as low as about 260mAh / g, which has the problem of short charge and discharge life

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
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Effect test

no. 1 Embodiment approach

[0030] The active material of the first embodiment contains a monoclinic niobium composite oxide, and the active material is a niobium-titanium composite oxide Nb 2 TiO 7 In the crystal lattice, a part of niobium (Nb) at the niobium site or titanium (Ti) at the titanium site is replaced by the element M (M (VI ), M(V), M(I)) substituted active substances.

[0031]

[0032]

[0033]

[0034] Among them, M(VI) is at least one of Mo and W, M(V) is at least one of Nb, Ta, and V, and M(I) is at least one of Na, K, Rb, and Cs.

[0035] More specifically, in the above formulas (1) to (3), M(VI) may be one of Mo and W, or a combination of both Mo and W. M(V) may be any one of Nb, Ta, and V, or a combination of two or more of them. M(I) may be any one of Na, K, Rb, and Cs, or a combination of two or more of them.

[0036] The niobium-titanium composite oxide mainly shows a monoclinic crystal structure. As an example, monoclinic Nb 2 Ti 0.9 (Nb 0.75 Na 0.25 ) 0.1 o 7...

no. 2 Embodiment approach

[0109] In the second embodiment, there is provided a non-aqueous electrolyte battery including a negative electrode containing the active material of the first embodiment, a positive electrode, a non-aqueous electrolyte, a separator, and an exterior member.

[0110] The negative electrode, positive electrode, non-aqueous electrolyte, separator, and exterior member will be described in detail below.

[0111] 1) Negative electrode

[0112] The negative electrode includes a current collector and a negative electrode layer (that is, a layer containing a negative electrode active material). The negative electrode layer is formed on one or both sides of the current collector, and contains an active material, an optional conductive agent, and a binder.

[0113] As the negative electrode active material, the battery active material described in the first embodiment was used. Thereby, a battery having excellent productivity, excellent rapid charge and discharge performance, and high ...

no. 3 Embodiment approach

[0164] 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 connected and arranged electrically in series or in parallel. Alternatively, these cells may be connected in series and in parallel in combination. Multiple cells can also be electrically connected to form a battery pack. The battery pack of the third embodiment may also include a plurality of assembled batteries.

[0165] The battery pack of the third embodiment may further include a protection circuit. The protection circuit controls the charging and discharging of the non-aqueous 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

The present invention provides an active material, a nonaqueous electrolyte battery, a battery pack and a vehicle. According to one embodiment, an active material including a monoclinic niobium-titanium composite oxide is provided. In the active material, a portion of niobium (Nb) or titanium (Ti) as a constituent element of Nb 2 TiO 7 is substituted by an element. Here, the substitution of Nb or Ti satisfies any one of following formulas (1) to (3), wherein M(VI) is at least one of Mo and W, M(V) is at least one of Nb, Ta, and V, and M(I) is at least one of Na, K, Rb, and Cs.

Description

technical field [0001] Embodiments relate to active materials, nonaqueous electrolyte batteries, battery packs, and vehicles. Background technique [0002] In recent years, nonaqueous electrolyte batteries such as lithium ion secondary batteries have been developed as high energy density batteries. Non-aqueous electrolyte batteries are expected to be used as power sources for vehicles such as hybrid and electric vehicles. In addition, batteries for stationary power sources are also attracting attention as applications such as balancing day and night power consumption and smart grids. Therefore, non-aqueous electrolyte batteries are also required to have other characteristics such as rapid charge and discharge performance and long-term reliability. A nonaqueous electrolyte battery capable of rapid charge and discharge has the advantage of a very short charge time. In addition, this non-aqueous electrolyte battery can improve power performance in hybrid vehicles. Furthermo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M10/0525H01M50/178H01M50/211H01M50/249H01M50/548
CPCH01M4/362H01M4/485H01M10/0525H01M2220/10H01M2220/20H01M50/548H01M50/211H01M50/178H01M50/249C01G33/006C01G39/006C01P2002/76C01P2002/77C01P2004/61C01P2006/12C01P2006/40Y02P20/133Y02E60/10H01M50/581H01M4/131H01M2200/10
Inventor 原田康宏高见则雄
Owner KK TOSHIBA