Active material, active material composite material, electrode, secondary battery, battery pack, and vehicle

A technology of active materials and battery packs, applied in active material electrodes, secondary battery charging/discharging, small-sized batteries/battery packs, etc., can solve the problem of low energy density and achieve the effect of improving electronic conductivity

Active Publication Date: 2019-10-22
KK TOSHIBA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a battery with a negative electrode using titanium oxide as a negative electrode active m

Method used

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  • Active material, active material composite material, electrode, secondary battery, battery pack, and vehicle
  • Active material, active material composite material, electrode, secondary battery, battery pack, and vehicle
  • Active material, active material composite material, electrode, secondary battery, battery pack, and vehicle

Examples

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Example

[0029] (First embodiment)

[0030] According to the first embodiment, an active material is provided. The active material is a particle of a monoclinic niobium-titanium composite oxide whose average value of the aspect ratio of the primary particles is 5 or more.

[0031] The aspect ratio of the primary particle refers to the ratio L / S of the major axis length L to the minor axis length S of the primary particle. When using an active material in which the average aspect ratio of the primary particles is 5 or more, that is, the shape of the primary particles is an elongated rod-like active material, the average aspect ratio of the primary particles is less than 5, that is, the shape of the primary particles is more Compared with the case of an approximately spherical active material, the gap between primary particles can be reduced, and therefore the density of the electrode can be increased.

[0032] In addition, when an active material having an average aspect ratio of primary par...

Example

[0114] [Second Embodiment]

[0115] According to the second embodiment, electrodes are provided. The electrode of the second embodiment contains the active material of the first embodiment. The active material may be in the form of the above-mentioned active material composite material. The electrode of the second embodiment may be a battery electrode. The electrode of the second embodiment can be used as a negative electrode, for example.

[0116] The electrode of the second embodiment may include a current collector and an active material-containing layer. The active material-containing layer may be formed on one side or both sides of the current collector. The active material-containing layer may contain an active material, and optionally a conductive agent and a binder.

[0117] The active material-containing layer may contain the active material of the first embodiment alone, or may contain two or more types of the active material of the first embodiment. Furthermore, it i...

Example

[0131] [Third Embodiment]

[0132] According to the third embodiment, a secondary battery including a negative electrode, a positive electrode, and an electrolyte is provided. This secondary battery contains the electrode of the second embodiment as a negative electrode.

[0133] The secondary battery of 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. The electrolyte can be kept in the electrode group.

[0134] In addition, the secondary battery of the third embodiment may further include an outer packaging member that houses the electrode group and the electrolyte.

[0135] Furthermore, the secondary battery of the third embodiment may further include a negative electrode terminal electrically connected to the negative electrode and a positive electrode terminal electrically connected to the positive electrode....

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Abstract

Embodiments of the present invention relate to an active material, an active material composite material, an electrode, a secondary battery, a battery pack, and a vehicle. Specifically, the present invention provides an active material capable of improving the density and electron conductivity of an electrode, and an active material composite material, an electrode, a secondary battery, a batterypack, and a vehicle containing the active material. According to an embodiment, an active material is provided. The active material is particles of a monoclinic niobium-titanium composite oxide in which the average aspect ratio of primary particles is 5 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 electric storage. When a secondary battery is used as a power source for a vehicle, in addition to high energy density, it is required to achieve rapid charge and discharge performance, long-term reliability, and the like. [0003] Rapid charge and discharge means that lithium ions and electrons can move rapidly between the positive and negative electrodes that can occlude / release lithium ions and electrons, respectively, via the electrolyte...

Claims

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Application Information

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IPC IPC(8): H01M4/48H01M4/485H01M10/0525C01G33/00C01G37/00C01G39/00C01G41/00C01G49/00H01M50/178H01M50/211H01M50/271H01M50/284H01M50/296H01M50/548H01M50/55H01M50/553H01M50/562
CPCH01M4/48H01M4/485H01M10/0525C01G33/006C01G37/00C01G39/006C01G41/006C01G49/009H01M2004/021H01M2004/027C01P2004/61H01M50/553H01M50/178H01M50/284H01M50/296H01M50/211H01M50/55H01M50/548H01M50/271H01M50/562H01M2220/20H01M2200/00C01G33/00C01P2006/40C01P2002/30C01P2002/76C01P2002/72C01P2002/52C01P2002/54C01P2004/54C01P2002/60C01P2004/51C01P2006/12B60L50/66B60L50/64B60L53/80Y02T10/7072H01M4/133H01M4/366H01M4/661H01M10/44H01M10/425H01M2004/028B60L50/51H01M50/519H01M4/625H01M50/509H01M50/209H01M4/131H01M50/249
Inventor 原田康宏高见则雄深谷太郎岩崎拓哉
Owner KK TOSHIBA
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