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Active material, nonaqueous alectrolyte battery, battery pack and battery

A non-aqueous electrolyte, active material technology, applied in non-aqueous electrolyte batteries, active material electrodes, battery electrodes, etc., can solve the problems of electrochemical limitation, electrode potential drop, etc., achieve excellent life characteristics, easy voltage management, high battery The effect of voltage

Active Publication Date: 2016-09-28
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The potential of titanium oxide is due to the Ti when lithium is electrochemically intercalated and detached. 3+ and Ti 4+ caused by redox reactions between
Therefore, in the past, it was difficult to lower the electrode potential in order to increase the energy density.

Method used

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  • Active material, nonaqueous alectrolyte battery, battery pack and battery
  • Active material, nonaqueous alectrolyte battery, battery pack and battery
  • Active material, nonaqueous alectrolyte battery, battery pack and battery

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0031] According to the first embodiment, there is provided an active material for a battery including a composite oxide having an orthorhombic crystal structure. The composite oxide is composed of the general formula Li 2+w Na 2-x M1 y Ti 6-z M2 z o 14+δ express. Here, M1 is at least one selected from the group consisting of Cs and K. M2 is at least one selected from the group consisting of Zr, Sn, V, Nb, Ta, Mo, W, Fe, Co, Mn and Al. w is in the range of 0≤w≤4. x is in the range 02+w Na 2 Ti 6 o 14+δ After a part of the Na site in the orthorhombic crystal structure of the composite oxide shown is replaced with a cation M1 and / or Na ions are detached from a part of the Na site to become a hole and at least a part of the Ti site is replaced with a cation M2 replacement complex oxides.

[0032] When the amount of Na in the crystal structure of the composite oxide changes, the potential expression of the composite oxide with respect to the oxidation-reduction potenti...

no. 2 approach

[0105] According to a second embodiment, there is provided a nonaqueous electrolyte battery. This nonaqueous electrolyte battery includes a negative electrode containing the battery active material according to the first embodiment, a positive electrode, and a nonaqueous electrolyte.

[0106] The nonaqueous electrolyte battery according to 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 spacer can constitute an electrode group. The non-aqueous electrolyte can be held in the electrode group.

[0107] In addition, the non-aqueous electrolyte battery according to the second embodiment may further include a packaging member for accommodating the electrode group and the non-aqueous electrolyte.

[0108] Furthermore, the non-aqueous electrolyte battery according to the second embodiment may further include a positive terminal electrically connected to t...

no. 3 approach

[0173] According to a third embodiment, there is provided a battery pack. This battery pack includes the nonaqueous electrolyte battery according to the second embodiment.

[0174] The battery pack according to the third embodiment may include one or more of the non-aqueous electrolyte cells (single cells) according to the second embodiment described above. The plurality of non-aqueous electrolyte batteries that may be included in the battery pack according to the third embodiment may be electrically connected in series or parallel to each other to form a battery pack. The battery pack according to the third embodiment may include a plurality of assembled batteries.

[0175] Next, an example battery pack according to the third embodiment will be described with reference to the drawings.

[0176] Figure 7 It is an exploded perspective view of an example battery pack according to the third embodiment. Figure 8 yes means Figure 7 A block diagram of the battery pack circui...

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Abstract

The invention realizes a nonaquesous alectrolyte battery with high energy density, high battery voltage and excellent life features, and the voltage management can be easily carried out; in general, according to one embodiment, there is provided an active material. The active material contains a composite oxide having an orthorhombic crystal structure. The composite oxide is represented by a general formula of Li 2+w Na 2-x M1 y Ti e-z M2 z O 14+delta. In the general formula, the M1 is at least one selected from the group consisting of Cs and K; the M2 is at least one selected from the group consisting of Zr, Sn, V, Nb, Ta, Mo, W, Fe, Co, Mn, and Al; and w is within a range of 0 <=w <= 4, x is within a range of 0 < x < 2, y is within a range of 0 <= y < 2, z is within a range of 0 < z <= 6, and delta is within a range of -0.5 <= <= 0.5.

Description

technical field [0001] Embodiments of the present invention relate to an active material for a battery, a nonaqueous electrolyte battery, a battery pack, 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 continuously conducted as high-energy-density batteries. Non-aqueous electrolyte batteries are expected as power sources for hybrid vehicles, electric vehicles, uninterruptible power supplies for mobile phone base stations, and the like. Therefore, nonaqueous electrolyte batteries are required to be excellent in other characteristics such as rapid charge and discharge characteristics and long-term reliability in addition to high energy density. For example, non-aqueous electrolyte batteries that can be quickly charged and discharged can not only greatly shorten the charging time, but also improve the power performance of hybrid vehicles and the li...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M10/0525
CPCH01M4/362H01M4/48H01M10/0525C01G23/003C01G23/005C01G25/006C01G31/006C01G33/006C01G35/006C01G39/006C01G49/0027C01G51/42C01P2002/72C01P2002/76C01P2002/77C01P2006/12C01P2006/40H01M4/131H01M4/366H01M4/485H01M4/625H01M2004/021Y02E60/10H01M10/052H01M2004/027
Inventor 原田康宏高见则雄吉田赖司伊势一树
Owner KK TOSHIBA
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