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Electrode, nonaqueous electrolyte battery, and battery pack

An electrode and electrode layer technology, applied in the direction of batteries, negative electrodes, battery electrodes, etc., can solve problems such as low energy density

Active Publication Date: 2016-10-05
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] On the other hand, the non-aqueous electrolyte battery using spinel-type lithium titanate as the negative electrode active material has the problem of low energy density, and a negative electrode material capable of obtaining high capacity is necessary.

Method used

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  • Electrode, nonaqueous electrolyte battery, and battery pack
  • Electrode, nonaqueous electrolyte battery, and battery pack
  • Electrode, nonaqueous electrolyte battery, and battery pack

Examples

Experimental program
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Effect test

no. 1 Embodiment approach

[0023] According to the first embodiment, an electrode is provided. This electrode includes a current collector and an electrode layer formed on the current collector. The electrode layer contains active material particles containing niobium-titanium composite oxide. The mode diameter in the pore diameter distribution of the electrode layer obtained by the mercury porosimetry is in the range of 0.1 μm to 0.2 μm.

[0024] First, the electrode layer included in the electrode of the first embodiment includes active material particles containing niobium-titanium composite oxide. The mode diameter in the pore diameter distribution of the electrode layer obtained by mercury porosimetry is in the range of 0.1 μm to 0.2 μm.

[0025] The niobium-titanium composite oxide may change in volume due to intercalation and deintercalation of lithium during charging and discharging, for example. Since the electrode layer included in the electrode of the first embodiment exhibits a pore size ...

no. 2 Embodiment approach

[0072] According to the second embodiment, there is provided a nonaqueous electrolyte battery. This non-aqueous electrolyte battery includes the electrode of the first embodiment as a negative electrode, a positive electrode, and a non-aqueous electrolyte.

[0073] Next, the non-aqueous electrolyte battery of the second embodiment will be described in more detail.

[0074] The non-aqueous electrolyte battery of the second embodiment includes the electrode of the first embodiment as a negative electrode. Since it was described in detail in the first embodiment, description of the negative electrode is omitted here. In the following description, in order to distinguish the current collector, electrode layer, active material, and electrode tab in the electrode of the first embodiment as the negative electrode from these parts of the positive electrode, they are referred to as the negative electrode current collector, the negative electrode, and the negative electrode. layer, ne...

no. 3 Embodiment approach

[0161] According to a third embodiment, a battery pack is provided. This battery pack includes the nonaqueous electrolyte battery of the second embodiment.

[0162] The battery pack of the third embodiment may include one or more nonaqueous electrolyte batteries (single cells) of the second embodiment described above. The plurality of non-aqueous electrolyte batteries that can be included in the battery pack according to the third embodiment can be electrically connected to each other in series or in parallel to form a battery pack. The battery pack of the third embodiment may include a plurality of assembled batteries.

[0163] Next, a battery pack as an example of the third embodiment will be described with reference to the drawings.

[0164] Figure 8 It is an exploded perspective view of a battery pack as an example of the third embodiment. Figure 9 yes means Figure 8 A block diagram of the battery pack circuit.

[0165] Figure 8 and Figure 9 The illustrated ba...

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Abstract

An electrode of a nonaqueous electrolyte battery, which can achieve input and output characters under large currents and has good cycle life characters, the nonaqueous electrolyte battery, and a battery pack are provided. According to one embodiment, the electrode is provided with a current collector and an electrode layer formed on the current collector. The electrode layer contains particles of an active material containing niobium-titanium composite oxide. A mode diameter in a pore diameter distribution of the electrode layer obtained by mercury porosimetry is within a range of 0.1 [mu]m to 0.2 [mu]m.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS: This application is based on and claims priority from Japanese Patent Application No. 2015-056956 filed on March 19, 2015, the entire contents of which are incorporated herein by reference. technical field [0002] Embodiments of the present invention relate to electrodes, nonaqueous electrolyte batteries, and battery packs. Background technique [0003] For example, non-aqueous electrolyte secondary batteries using lithium ions as charge carriers are widely used in various fields such as electric vehicles, electric storage, and information equipment as high-energy-density batteries. Along with this, the demand from the market has further increased for the non-aqueous electrolyte secondary battery, and the research has been advanced. [0004] Among them, the lithium-ion non-aqueous electrolyte secondary battery used in the electric vehicle power supply requires high energy density due to its application, that is, a large discha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/131H01M10/0525H01M50/51H01M50/512
CPCH01M4/131H01M4/483H01M10/0525H01M2004/027H01M2220/20H01M50/51H01M50/512H01M4/364H01M4/366H01M4/485H01M4/622H01M4/625H01M2004/021Y02E60/10H01M4/661
Inventor 岩崎拓哉原田康宏高见则雄
Owner KK TOSHIBA