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Battery electrode material, nonaqueous electrolyte battery, and battery pack

A non-aqueous electrolyte and electrode material technology, applied in battery electrodes, batteries, negative electrodes, etc., can solve problems such as low energy density, dissolution, and low capacity density

Active Publication Date: 2016-11-09
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, titanium oxide has problems such as not only having a high potential with respect to metal lithium compared with general carbon-based electrodes, but also having a low energy density due to a low capacity density per unit weight.
However, in such a method, there is a problem that modified cations and the like may be eluted into the electrolytic solution if used for a long time

Method used

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  • Battery electrode material, nonaqueous electrolyte battery, and battery pack
  • Battery electrode material, nonaqueous electrolyte battery, and battery pack
  • Battery electrode material, nonaqueous electrolyte battery, and battery pack

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0033] According to the first embodiment, an electrode material for a battery is provided. This battery electrode material contains active material particles. The active material particles contain a phase of monoclinic titanium dioxide and a phase of spinel lithium titanate. The active material particle includes a shell portion and a core portion surrounded by the shell portion. The shell portion is formed by dispersing at least a part of the phase of the spinel lithium titanate on the surface of the active material particle. The core part contains a part of the phase of monoclinic titanium dioxide.

[0034] First, monoclinic titanium dioxide and spinel lithium titanate will be described.

[0035] First of all, for monoclinic titanium dioxide, refer to figure 1 Be explained.

[0036] figure 1 is a schematic diagram of the crystal structure of monoclinic titanium dioxide. figure 1 In , the spheres forming an octahedral lattice represent oxygen atoms, and the spheres show...

no. 2 Embodiment approach

[0108] According to the second embodiment, a non-aqueous electrolyte battery including the battery electrode material of the first embodiment can be provided. The nonaqueous electrolyte battery includes a negative electrode, a positive electrode, and a nonaqueous electrolyte. The battery electrode 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.

[0109] 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.

[0110] 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

[0172] According to a third embodiment, a battery pack is provided. This battery pack includes the nonaqueous electrolyte battery of the second embodiment.

[0173] 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.

[0174] Below, refer to Figure 11 and Figure 12 An example of the battery pack of the third embodiment will be described.

[0175] Figure 11 It is an exploded perspective view of a battery pack as an example of the third embodiment. Figure 12 yes means Figure 11 A block diagram of the battery pack circuit.

[0176] Figure 11 and Figure 12 The battery pack 20 shown in is equipped with a plurality of single cells 21 . single cell 21 for reference Figure 7 a...

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Abstract

Provided is a battery electrode material according to one embodiment. The battery electrode material contains active material particles. The active material particles contain a monoclinic crystal titanium dioxide phase and a spinel lithium titanate phase. The active material particles contain an outer-shell section and a core section surrounded by the outer-shell section. The outer-shell section is formed by dispersing at least part of the spinel lithium titanate phase on the surface of the active material particles. The core section contains some of the monoclinic crystal titanium dioxide.

Description

technical field [0001] Embodiments of the present invention relate to an electrode material for batteries, a nonaqueous electrolyte battery, and a battery pack. Background technique [0002] In recent years, lithium ion secondary batteries in which charging and discharging are performed by moving lithium ions between a negative electrode and a positive electrode have been extensively researched and developed as high energy density batteries. In particular, non-aqueous electrolyte batteries are expected as power sources for hybrid vehicles, electric vehicles, and uninterruptible power supplies for mobile phone base stations. In addition to the high energy density that has been developed in the past, rapid charge and discharge characteristics, long-term reliability, and safety are also required. Sex and many other characteristics. [0003] In recent years, metal composite oxides have been attracting attention as lithium hosts of electrodes. In particular, an electrode materi...

Claims

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Application Information

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IPC IPC(8): H01M4/485H01M2/10H01M4/36H01M4/48H01M10/0525
CPCC01G23/003C01G23/005C01G23/047C01P2002/32C01P2002/76C01P2004/54C01P2004/61C01P2004/62C01P2004/64C01P2004/84C01P2006/12C01P2006/40H01M4/366H01M4/485H01M10/0525H01M10/425H01M2220/20Y02E60/10H01M4/483H01M2004/027Y02T10/70
Inventor 原田康宏高见则雄稻垣浩贵
Owner KK TOSHIBA