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

A technology for active materials and secondary batteries, which is applied in the manufacture of active material electrodes, secondary batteries, and electrolyte storage batteries, etc. It can solve the problems of electrode potential reduction and achieve high energy density and excellent charge and discharge rate performance.

Active Publication Date: 2018-10-09
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, conventionally, it has been difficult to lower the electrode potential in order to increase the energy density.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0033] According to the first embodiment, there is provided an active material including a composite oxide having a monoclinic crystal structure. The composite oxide has the general formula Li w M1 2-x Ti 8-y M2 z o 17+δ express. However, M1 is at least one selected from the group consisting of Cs, K and Na. M2 is at least one kind selected from the group consisting of Zr, Sn, V, Nb, Ta, Mo, W, Fe, Co, Mn and Al. w is 0≤w≤10. x is 0<x<2. y is 0<y<8. z is 0<z<8. δ is -0.5≤δ≤0.5.

[0034]The active material may be an active material for batteries. In the case of an active material for batteries, the active material may be contained in an electrode. In addition, in the electrode, an active material may be contained in an active material-containing layer. The active material-containing layer may further contain a conductive agent and a binder. An electrode containing an active material can be included in a secondary battery as a negative electrode, for example. Also...

no. 2 Embodiment approach

[0120] According to a second embodiment, there is provided a secondary battery including a negative electrode, a positive electrode, and an electrolyte. This secondary battery includes an electrode containing the active material according to the first embodiment as a battery active material as a negative electrode.

[0121] The secondary battery according to the second embodiment may further include a separator disposed between the positive electrode and the negative electrode. The negative electrode, the positive electrode and the separator can constitute an electrode group. Electrolyte can be held in the electrode group.

[0122] In addition, the secondary battery according to the second embodiment may further include an exterior member for accommodating the electrode group and the electrolyte.

[0123] Furthermore, the secondary battery according to the second embodiment may further include a negative terminal electrically connected to the negative electrode and a positiv...

no. 3 Embodiment approach

[0191] According to a third embodiment, an assembled battery is provided. The assembled battery according to the third embodiment includes a plurality of secondary batteries according to the second embodiment.

[0192] In the assembled battery according to the third embodiment, the individual cells are arranged electrically connected in series or in parallel, or may be arranged in combination of series connection and parallel connection.

[0193] Next, an example of the assembled battery according to the third embodiment will be described with reference to the drawings.

[0194] Figure 6 It is a perspective view schematically showing an example of the assembled battery described in the third embodiment. Figure 6 The assembled battery 200 shown in FIG. 2 includes five single cells 100 , four bus bars 21 , positive-side leads 22 , and negative-side leads 23 . Each of the five single cells 100 is a secondary battery described in the second embodiment.

[0195] The bus bar 21...

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Abstract

The embodiment of the invention relates to an active material, an electrode, a secondary battery, a battery pack, and a vehicle. The invention provides the active material of the secondary battery which can achieve both high energy density and excellent charge-discharge rate performance, the electrode including the active material, the secondary battery including the electrode, the battery pack equipped with the secondary battery, and the vehicle equipped with the battery pack. According to one approach, an active material including a composite oxide is provided. The composite oxide has a monoclinic crystal structure and is represented by the general formula LiwM12-xTi8-yM2zO17+delta , wherein: M1 is at least one selected from the group consisting of Cs, K, and Na; M2 is at least one selected from the group consisting of Zr, Sn, V, Nb, Ta, Mo, W, Fe, Co, Mn, and Al; 0 <=w <=10; 0 < x < 2; 0 < y < 8; 0 < z < 8; and -0.5 <=delta <=0.5.

Description

technical field [0001] Embodiments of the present invention relate to an active material, an electrode, a secondary battery, a battery pack, and a vehicle. Background technique [0002] In recent years, research and development of secondary batteries such as nonaqueous electrolyte secondary batteries such as lithium ion secondary batteries as high energy density batteries has been actively carried out. Secondary batteries such as non-aqueous electrolyte secondary batteries are expected as power sources for vehicles such as hybrid cars and electric cars, and uninterruptible power supplies for mobile phone base stations. Therefore, secondary batteries are required to be excellent in other performances such as rapid charge and discharge performance and long-term reliability in addition to high energy density. For example, a secondary battery that can be quickly charged and discharged not only greatly shortens the charging time, but also enables the improvement of the power per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/505H01M4/525H01M10/0525H01M10/058H01M50/211H01M50/296
CPCH01M4/362H01M4/485H01M4/505H01M4/525H01M10/0525H01M10/058H01M2220/20H01M50/296H01M50/211C01G23/005C01G33/006C01P2002/72C01P2002/76C01P2002/77C01P2006/12H01M2004/027Y02P20/133Y02E60/10Y02P70/50C01G23/006C01G31/006C01G39/006C01G49/0027C01G51/42H01M4/366C01P2006/40H01M4/625H01M4/131
Inventor 原田康宏高见则雄
Owner KK TOSHIBA
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