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Active materials, active material composites, electrodes, secondary batteries, battery packs, and vehicles

A technology of active materials and composite materials, applied in active material electrodes, secondary battery charging/discharging, secondary batteries, etc.

Active Publication Date: 2021-03-02
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

active substance containing particles

Method used

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  • Active materials, active material composites, electrodes, secondary batteries, battery packs, and vehicles
  • Active materials, active material composites, electrodes, secondary batteries, battery packs, and vehicles
  • Active materials, active material composites, electrodes, secondary batteries, battery packs, and vehicles

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0040] According to the first embodiment, an active material is provided. The active substance contains particles. The particles have a crystal structure belonging to a monoclinic niobium-titanium composite oxide. The ratio of the crystallite diameter Dc of the (020) plane to the average primary particle diameter Dp of the particles is 35% or more.

[0041]In the XRD pattern of the active material according to the first embodiment, the peaks appearing in the range of incident angles from 47.6° to 47.9° belong to the plane index (020) in the crystal structure of the monoclinic niobium-titanium composite oxide. peak. In the crystal structure of the monoclinic niobium-titanium composite oxide, the [020] direction is one of the diffusion directions of lithium ions. Therefore, increasing the ratio of the crystallite diameter Dc of the (020) plane to the average primary particle diameter Dp increases the diffusibility of lithium ions in the crystal structure of the monoclinic nio...

no. 2 Embodiment approach

[0139] According to the second embodiment, electrodes are provided. The electrode according to the second embodiment includes the active material according to the first embodiment. The electrode according to the second embodiment may contain an active material composite material. The electrode according to the second embodiment may be an electrode for a battery. The electrode according to the second embodiment can be used, for example, as a negative electrode.

[0140] The electrode according to the second embodiment may include a current collector and an active material-containing layer. The active material-containing layer may be formed on one or both surfaces of the current collector. The active material-containing layer may contain an active material and optionally a conductive agent and a binder.

[0141] The active material-containing layer may contain the active material according to the first embodiment alone, or may contain two or more active materials according t...

no. 3 Embodiment approach

[0153] According to the third embodiment, there is provided a secondary battery including a negative electrode, a positive electrode, and an electrolyte. This secondary battery includes the electrode according to the second embodiment as a negative electrode.

[0154] The secondary battery according to the third embodiment may further include a separator arranged between the positive electrode and the negative electrode. The negative electrode, the positive electrode, and the separator may constitute an electrode group. Electrolyte can be held in the electrode group.

[0155] In addition, the secondary battery according to the third embodiment may further include an exterior member for accommodating the electrode group and the electrolyte.

[0156] Furthermore, the secondary battery according to the third embodiment may further include a negative terminal electrically connected to the negative electrode and a positive terminal electrically connected to the positive electrode...

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Abstract

The present invention relates to active materials, active material composite materials, electrodes, secondary batteries, battery packs and vehicles. To provide an active material excellent in charge-discharge cycle performance, an active material composite material containing the active material, an electrode, a secondary battery, a battery pack, and a vehicle. According to an embodiment, an active substance is provided. The active substance contains particles. The particles have a crystal structure belonging to the monoclinic niobium-titanium composite oxide. The ratio of the crystallite diameter Dc of the (020) plane to the average primary particle diameter Dp of the particles is 35% or more.

Description

technical field [0001] Embodiments of the present invention relate to active materials, active material composites, electrodes, secondary batteries, battery packs, and vehicles. Background technique [0002] In recent years, secondary batteries such as lithium ion secondary batteries and nonaqueous electrolyte secondary batteries have been developed as high energy density batteries. Secondary batteries are expected to be used as power sources for vehicles such as hybrid vehicles and electric vehicles, or as power sources for large-scale storage. In the case where a secondary battery is used as a power source for a vehicle, in addition to high energy density, rapid charge and discharge performance, long-term reliability, and the like are required to be realized. [0003] Rapid charge and discharge can be performed by rapidly moving lithium ions and electrons between positive and negative electrodes that can occlude and release lithium ions and electrons via an electrolyte an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/04C01G33/00H01M4/48H01M4/485H01M10/0525
CPCC01B32/00C01G23/04C01G33/00H01M4/48H01M4/485H01M10/0525H01M2004/027H01M2004/021H01M2220/20C01P2006/40C01P2002/82C01P2002/72C01G23/002C01G33/006H01M10/052Y02E60/10H01M10/44
Inventor 伊势一树原田康宏高见则雄
Owner KK TOSHIBA