Active material, non-aqueous electrolyte battery, battery pack and vehicle

A technology of non-aqueous electrolyte and negative active material, applied in non-aqueous electrolyte storage battery, traction of battery/battery, small-sized battery/battery pack, etc., can solve the problem of low battery voltage and achieve the effect of high reversible capacity

Active Publication Date: 2020-09-11
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lithium intercalation and deintercalation potential of spinel lithium titanate is as high as 1.55V (vs.Li / Li + ), the battery voltage of the non-aqueous electrolyte battery using spinel-type lithium titanate in the negative electrode is low

Method used

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  • Active material, non-aqueous electrolyte battery, battery pack and vehicle
  • Active material, non-aqueous electrolyte battery, battery pack and vehicle
  • Active material, non-aqueous electrolyte battery, battery pack and vehicle

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0027] According to the first embodiment, there is provided an active material including particles of Na-containing niobium-titanium composite oxide having an orthorhombic crystal structure. In the infrared diffuse reflectance spectrum measured by the diffuse reflectance Fourier transform infrared spectroscopy on the surface of the particles of Na-niobium-titanium composite oxide, at 3350 to 3450 cm -1 The strongest peak in the range of P 1 The peak intensity of I 1 1.6 or less.

[0028] The active material according to the first embodiment can be used, for example, as an active material for batteries.

[0029] The average operating potential of the Na-niobium-titanium composite oxide having an orthorhombic crystal structure contained in the active material according to the first embodiment may be 1.2 to 1.4 V (vs. Li / Li + ). This working potential is a low value even in titanium composite oxides. Therefore, the active material according to the first embodiment containing...

no. 2 Embodiment approach

[0119] According to the second embodiment, there is provided a nonaqueous electrolyte battery. The nonaqueous electrolyte battery includes a negative electrode, a positive electrode, and a nonaqueous electrolyte. The negative electrode contains the active material according to the first embodiment.

[0120] The non-aqueous electrolyte battery according to the second embodiment may further include a separator arranged between the positive electrode and the negative electrode. The positive electrode, the negative electrode and the separator can constitute an electrode group. A non-aqueous electrolyte may be held in the electrode group.

[0121] In addition, the non-aqueous electrolyte battery according to the second embodiment may further include an exterior member for accommodating the electrode group and the non-aqueous electrolyte.

[0122] In addition, the non-aqueous electrolyte battery according to the second embodiment may further include a positive terminal electrical...

no. 3 Embodiment approach

[0179] According to a third embodiment, a battery pack is provided. This battery pack includes the nonaqueous electrolyte battery according to the second embodiment.

[0180] The battery pack according to the third embodiment may include one or more of the non-aqueous electrolyte batteries (single cells) according to 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 in series, in parallel, or in combination. A plurality of non-aqueous electrolyte batteries can also be electrically connected to form a battery pack. The battery pack according to the third embodiment may include a plurality of assembled batteries.

[0181] The battery pack according to the third embodiment may further include a protection circuit. The protection circuit controls the charge and discharge of the non-aqueous electrolyte battery. Alternatively, a circuit...

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Abstract

The present invention provides an active material capable of realizing a nonaqueous electrolyte battery that can exhibit a high reversible capacity. According to one embodiment, there is provided an active material comprising particles of a Na-containing niobium-titanium composite oxide having an orthorhombic crystal structure. In the infrared diffuse reflectance spectrum measured by the diffuse reflectance Fourier transform infrared spectroscopy on the surface of the particles of Na-niobium-titanium composite oxide, at 3350 to 3450 cm ‑1 The strongest peak in the range of P 1 The peak intensity of I 1 1.6 or less.

Description

technical field [0001] Embodiments of the present invention relate to an active material, a nonaqueous electrolyte battery, a battery pack, and a vehicle. Background technique [0002] Non-aqueous electrolyte batteries, in which lithium ions are charged and discharged by moving between the negative electrode and the positive electrode, have been extensively researched as high-energy-density batteries. [0003] This non-aqueous electrolyte battery is expected to be used as a large and medium-sized power source such as in-vehicle use and stationary use, in addition to its use as a power source for small electronic devices. In such large and medium-sized applications, non-aqueous electrolyte batteries are required to have life characteristics and high safety. In addition, high input-output characteristics of the non-aqueous electrolyte battery are also required. [0004] Examples of nonaqueous electrolyte batteries having excellent life characteristics and high safety include...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/485H01M10/05H01M50/178H01M50/211H01M50/296H01M50/548H01M50/553H01M50/562
CPCH01M4/364H01M4/485H01M10/05H01M50/553H01M50/178H01M50/296H01M50/211H01M50/548H01M50/562C01G23/04H01M10/0525H01M4/505H01M4/525H01M4/5825H01M10/425H01M2220/20Y02E60/10Y02T10/70B60L50/66H01M4/131B60L2200/12B60Y2200/90H01M50/20H01M50/543H01M10/4257H01M50/502H01M2004/021H01M10/44
Inventor 保科圭吾原田康宏高见则雄
Owner KK TOSHIBA
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