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Electrode, non-aqueous electrolyte battery and battery pack

An electrode and battery technology, applied in the direction of non-aqueous electrolyte batteries, battery/battery traction, battery/fuel cell control devices, etc., can solve the problems of reduced adhesion, failure to obtain excellent cycle characteristics, etc., and achieve excellent ratio performance, Effect of high capacity and long cycle life

Active Publication Date: 2017-04-12
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, when titanium oxide having a monoclinic β-type structure is used alone as an anode active material, the adhesion between the layer including the anode active material and the current collector is reduced, and thus the layer including the anode active material may be separated from the collector. Electric body is separated, and excellent cycle characteristics cannot be obtained

Method used

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  • Electrode, non-aqueous electrolyte battery and battery pack
  • Electrode, non-aqueous electrolyte battery and battery pack
  • Electrode, non-aqueous electrolyte battery and battery pack

Examples

Experimental program
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no. 1 approach

[0027] According to a first embodiment, an electrode includes a current collector and a layer including an active material. The layer containing the active material includes a first layer and a second layer. The first layer is formed on both sides or one side of the current collector, and includes lithium titanium oxide having a spinel structure as an active material. The second layer is formed on the first layer, and includes monoclinic β-type titanium composite oxide as an active material.

[0028] Lithium titanium oxides with a spinel structure are preferably denoted as Li 4+x Ti 5 o 12 (0≤x≤3). Thanks to Li 4+x Ti 5 o 12 (0≦x≦3) is weakly basic, and corrosion of the current collector (for example, a current collector containing aluminum) can be suppressed, whereby the adhesion between the current collector and the active material can be improved.

[0029] The monoclinic β-type titanium composite oxide is satisfactorily a titanium composite oxide having a monoclinic...

no. 2 approach

[0049] According to the second embodiment, there is provided a nonaqueous electrolyte battery including a positive electrode, a negative electrode, and a nonaqueous electrolyte. The electrode of the first embodiment is used as a negative electrode. The nonaqueous electrolyte battery may further include a separator disposed between the positive electrode and the negative electrode, and a case accommodating the positive electrode, the separator, the negative electrode, and the nonaqueous electrolyte. The positive electrode, nonaqueous electrolyte, separator, and case are described below.

[0050] (positive electrode)

[0051] The positive electrode includes a positive electrode current collector and a layer containing a positive electrode active material. The positive active material-containing layer includes a positive active material, a conductive agent, and a binder. A positive electrode active material-containing layer is provided on one or both sides of the positive elec...

no. 3 approach

[0083] Next, a battery pack according to a third embodiment will be described with reference to the drawings. A battery pack according to a third embodiment includes one or two or more nonaqueous electrolyte batteries according to the second embodiment as unit cells, and a case in which the nonaqueous electrolyte batteries are housed. When the battery pack includes two or more unit cells, the unit cells are arranged in series or parallel electrical connection.

[0084] Figure 4 and 5 An example of a battery pack 20 is shown. The battery pack 20 includes a plurality of flat batteries 21, each of which has figure 2 structure shown. Figure 4 is an exploded perspective view of the battery pack 20 . Figure 5 is showing Figure 4 A block diagram of the electrical circuitry of the battery pack 20 is shown.

[0085] A plurality of unit cells 21 are laminated so that the negative terminal 19 and the positive terminal 18 extending outward are aligned in the same direction, an...

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Abstract

According to one embodiment, an electrode includes a current collector and a layer comprising an active material. The active material-containing layer includes a first layer and a second layer. The first layer is provided on the surface of the current collector and includes lithium titanium oxide having a spinel structure. The second layer is provided on the first layer, and includes a monoclinic β-type titanium composite oxide.

Description

[0001] Cross-references to related patent applications [0002] This application is based on and claims priority from Japanese Patent Application No. 2013-022212 filed on February 7, 2013, the entire contents of which are hereby incorporated by reference. technical field [0003] Embodiments described in the present invention generally relate to electrodes, nonaqueous electrolyte cells, and batteries. Background technique [0004] Lithium titanium oxides with spinel structure (Li 4 Ti 5 o 12 ) has three lithium ions capable of absorbing and releasing per unit chemical formula. For this reason, the number of lithium ions that can be absorbed and released is 3 / 5 per titanium ion; that is, 0.6 is its theoretical maximum value. The theoretical capacity of this type of lithium titanium oxide having a spinel structure is about 170 mAh / g. [0005] Recently, titanium oxides having a monoclinic β-type structure have attracted attention as high-capacity anode materials. In titan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/131H01M4/48H01M10/052
CPCH01M4/131H01M4/366H01M4/485H01M10/0525H01M2004/021H01M2200/10H01M2220/20B60L1/02B60L3/04B60L2200/12B60L2240/545B60L2240/549B60L50/52B60L50/64B60L58/14B60L58/15B60L58/18B60L58/21B60L58/26B60L58/27Y02E60/10Y02T10/70B60L3/0046
Inventor 吉田赖司安田一浩岸敬稻垣浩贵高见则雄
Owner KK TOSHIBA