Electrodes, non-aqueous electrolyte batteries, battery packs and vehicles

A non-aqueous electrolyte, battery pack technology, used in batteries, battery electrodes, secondary batteries, etc., to achieve excellent rapid charge and discharge performance, good life performance, high energy density.

Active Publication Date: 2020-03-27
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrodes contain active substances

Method used

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  • Electrodes, non-aqueous electrolyte batteries, battery packs and vehicles
  • Electrodes, non-aqueous electrolyte batteries, battery packs and vehicles
  • Electrodes, non-aqueous electrolyte batteries, battery packs and vehicles

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0034] The electrode of the first embodiment contains an active material, and the surface composition ratio (Li+C+O) / P of the electrode measured by X-ray photoelectron spectroscopy (XPS; X-ray Photoelectron Spectroscopy) is 2 or more and 14 or less In the range. In addition, the active material contained in the electrode of this embodiment may contain, for example, a niobium-titanium composite oxide.

[0035] Embodiments are described below with reference to the drawings.

[0036] The electrode according to the embodiment has a surface composition ratio (Li+C+O) / P measured by X-ray photoelectron spectroscopy (XPS) in the range of 2 to 14. The above surface composition ratio (Li+C+O) / P represents the ratio of the sum of lithium atoms (Li), carbon atoms (C) and oxygen atoms (O) to phosphorus atoms (P) in the electrode surface. This surface composition ratio can be obtained by measuring the electrode by XPS. The details of the measurement by XPS will be described later.

[00...

no. 2 Embodiment approach

[0070] The nonaqueous electrolyte battery of the second embodiment includes a negative electrode, a positive electrode, a separator, and a nonaqueous electrolyte. The negative electrode contained in the nonaqueous electrolyte of this embodiment is the electrode of the first embodiment.

[0071] The negative electrode, positive electrode, nonaqueous electrolyte, separator, and exterior member that may be included in the nonaqueous electrolyte battery of the embodiment will be described in detail below.

[0072] 1) Negative electrode

[0073] 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. In addition, the surface composition ratio (Li+C+O) / P of the negative electrode measured by X-ray photoelectron spectroscopy (XP...

no. 3 Embodiment approach

[0124] 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.

[0125] 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 invention provides an electrode, a nonaqueous electrolyte battery, a battery pack and a vehicle. Electrodes are provided according to an embodiment. The surface composition ratio (Li+C+O) / P of the electrode measured by X-ray photoelectron spectroscopy XPS is within the range of 2 to 14.

Description

technical field [0001] Embodiments relate to electrodes, 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, it is expected to be used as an uninterruptible power supply for mobile base stations. 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 also improve power performance in hybrid vehicles and other vehicles. Furthermore, such a non-aqueous electrolyte battery can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/136H01M4/36H01M4/58H01M10/0525
CPCH01M4/136H01M4/364H01M4/5825H01M10/0525H01M4/366H01M4/485H01M4/505H01M4/525H01M4/62H01M2004/021H01M2220/20Y02E60/10
Inventor 张文保科圭吾原田康宏岩崎拓哉高见则雄
Owner KK TOSHIBA
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