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Active material for batteries, non-aqueous electrolyte battery, and battery pack

A non-aqueous electrolyte and active material technology, applied in the direction of non-aqueous electrolyte batteries, non-aqueous electrolyte, active material electrodes, etc., can solve the problems of reduced capacity and few equivalent sites

Active Publication Date: 2015-12-23
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is caused by the fact that there are few equivalent sites for inserting lithium in the crystal structure of titanium oxide, or that the substantial capacity decreases because lithium is easily stabilized in the structure.

Method used

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  • Active material for batteries, non-aqueous electrolyte battery, and battery pack
  • Active material for batteries, non-aqueous electrolyte battery, and battery pack
  • Active material for batteries, non-aqueous electrolyte battery, and battery pack

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0033] According to the first embodiment, an active material for a battery is provided. The battery active material contains a composite oxide represented by the following general formula:

[0034] Formula Li x (Nb 1-y Ta y ) 2-z Ti 1+0.5z m 0.5z o 7 .

[0035] In the formula, 0≤x≤5, 0≤y≤1, 0<z≤1, and M is at least one metal element selected from the group consisting of Mo and W.

[0036] Formula Li x (Nb 1-y Ta y ) 2-z Ti 1+0.5z m 0.5z o 7 The indicated composite oxide may have a monoclinic crystal structure.

[0037] As the general formula Li x (Nb 1-y Ta y ) 2-z Ti 1+0.5z m 0.5z o 7 An example of the composite oxide represented by the monoclinic composite oxide Nb 1.9 Ti 1.05 Mo 0.05 o 7 A schematic diagram of the crystal structure is shown in figure 1 and figure 2 middle.

[0038] Such as figure 1 As shown, in the monoclinic composite oxide Nb 1.9 Ti 1.05 Mo 0.05 o 7 In the crystal structure of , metal ions 101 and oxide ions 102 constitu...

no. 2 Embodiment approach

[0096] According to the second embodiment, a non-aqueous electrolyte battery including the active material for a battery of the first embodiment can be provided. The nonaqueous electrolyte battery includes a negative electrode, a positive electrode, and a nonaqueous electrolyte. The battery active material according to the first embodiment can be used for a negative electrode, a positive electrode, or both of the negative electrode and the positive electrode.

[0097] The non-aqueous electrolyte battery of the second embodiment may further include a separator disposed 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.

[0098] In addition, the non-aqueous electrolyte battery of the second embodiment may further include an exterior member for accommodating the electrode group and the non-aqueous electrolyte....

no. 3 Embodiment approach

[0160] According to a third embodiment, a battery pack is provided. This battery pack includes the nonaqueous electrolyte battery of the second embodiment.

[0161] The battery pack of the third embodiment may include a plurality of non-aqueous electrolyte batteries. A plurality of nonaqueous electrolyte batteries may be electrically connected in series, or may be electrically connected in parallel. Alternatively, a plurality of non-aqueous electrolyte batteries may be connected in series and in parallel in combination.

[0162] Below, refer to Figure 7 and Figure 8 An example of the battery pack of the third embodiment will be described.

[0163] Figure 7 It is an exploded perspective view of a battery pack as an example of the third embodiment. Figure 8 yes means Figure 7 A block diagram of the battery pack circuit.

[0164] Figure 7 and Figure 8 The illustrated battery pack 20 includes a plurality of single cells 21 . single cell 21 for reference image 3...

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Abstract

According to one embodiment, an active material for batteries is provided. The active material for batteries comprises a composite oxide represented by the general formula: Lix(Nb1-yTay)2-zTi1+0.5zM0.5zO7. In the formula, 0<=x<=5, 0<=y<=1, 0<z<=1, and M represents at least one metal element selected from the group consisting of Mo and W.

Description

technical field [0001] Embodiments of the present invention relate to an active material for batteries, a nonaqueous electrolyte battery, and a battery pack. Background technique [0002] In recent years, research and development of non-aqueous electrolyte batteries such as lithium-ion secondary batteries have been widely carried out as high-energy-density batteries. Non-aqueous electrolyte batteries are expected as power sources for hybrid vehicles, electric vehicles, and uninterruptible power supplies for mobile phone base stations. Therefore, nonaqueous electrolyte batteries are also required to have other characteristics such as rapid charge and discharge characteristics and long-term reliability. For example, non-aqueous electrolyte batteries capable of rapid charge and discharge can not only significantly shorten the charging time, but also improve the power performance of hybrid vehicles and the like and effectively recover power regeneration energy. [0003] In ord...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M50/211H01M50/264H01M50/271H01M50/293H01M50/296H01M50/298H01M50/569
CPCH01M4/131H01M4/1391H01M4/366H01M4/587H01M4/625H01M10/0525H01M10/425H01M10/486H01M2200/10C01G39/006C01P2002/77C01P2006/12C01P2006/40C01G33/006C01G35/006H01M4/485H01M10/052H01M2004/027C01G41/006Y02E60/10H01M50/581H01M50/271H01M50/296H01M50/298H01M50/293H01M50/569H01M50/264H01M50/211H01M50/20H01M4/48H01M50/116H01M50/502H01M2004/021H01M2220/20Y02T10/70H01M10/4257H01M2220/30H01M2300/0017H01M2300/0022H01M2300/0068H01M2300/0082H01M2300/0085
Inventor 原田康宏高见则雄吉田赖司伊势一树吉间一臣
Owner KK TOSHIBA
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