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Electrode, non-aqueous electrolyte battery and battery pack

一种非水电解质、电极的技术，应用在大尺寸的电池/电池组、小尺寸的电池/电池组、电池电极等方向，能够解决能量密度低等问题，达到改善输入输出特性的效果

Active Publication Date: 2016-04-27
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] On the other hand, for non-aqueous electrolyte batteries using spinel-type lithium titanate as the negative electrode active material, there is a problem of low energy density, and it is necessary to obtain high-capacity negative electrode materials.

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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Effect test

no. 1 Embodiment approach

[0025] According to the first embodiment, there is provided an electrode including a current collector and an active material-containing layer formed on the current collector. The active material-containing layer may be formed on one or both surfaces of the current collector. The Li intercalation potential of the active material contained in the active material layer is 0.4V (vs.Li / Li + )above. In the pore size distribution measured by mercury porosimetry, there are a first peak having a mode diameter of 0.01 μm to 0.1 μm and a second peak having a mode diameter of more than 0.2 μm and 1 μm or less. The volume of the pores measured by the mercury porosimetry is 0.1 mL to 0.3 mL per 1 g of the electrode weight (the weight excluding the current collector).

[0026] The reason for setting the Li intercalation potential of the active material within the above range will be described. For a ratio of 0.4V (vs.Li / Li + ) Active materials (such as graphite, lithium metal, etc.) tha...

no. 2 Embodiment approach

[0052] According to the second embodiment, it is possible to provide a nonaqueous electrolyte battery including a positive electrode, the electrode of the first embodiment as a negative electrode, and a nonaqueous electrolyte.

[0053] For an example of the non-aqueous electrolyte battery of the second embodiment, refer to Figure 1 to Figure 3 Detailed description. figure 1 It is a sectional view showing an example of the non-aqueous electrolyte battery of the second embodiment, that is, a flat lithium-ion secondary battery, figure 2 yes means figure 1 An enlarged cross-sectional view of part A of, image 3 yes means figure 1 A schematic diagram of the vicinity of the boundary of the secondary battery containing the positive electrode active material layer, the porous separator, and the layer containing the negative electrode active material.

[0054] like figure 1 As shown, for example, an electrode group 2 is accommodated in an exterior member 1 made of a film. The e...

no. 3 Embodiment approach

[0107] The battery pack of the third embodiment includes one or more nonaqueous electrolyte batteries of the second embodiment. Preferably, the non-aqueous electrolyte battery of the second embodiment is used as a unit cell, and the unit cells are electrically connected in series or in parallel to form a battery pack.

[0108] The non-aqueous electrolyte battery of the second embodiment is suitable for being assembled into a battery pack, and the battery pack of the third embodiment has excellent cycle characteristics. Explain this.

[0109] When the retention of the non-aqueous electrolyte is improved, the entire surface of the negative electrode active material can be brought into contact with the non-aqueous electrolyte, and the lithium ion concentration in the negative electrode active material can be easily made uniform. As a result, application of an overvoltage becomes difficult, that is, since local overcharge and overdischarge are less likely to occur, the utilizatio...

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Abstract

The present invention relates to an electrode, a nonaqueous electrolyte battery and a battery pack. To provide electrodes, non-aqueous electrolyte batteries and battery packs with improved input and output characteristics. According to an embodiment, an electrode including a current collector and an active material-containing layer formed on the current collector is provided. The Li insertion potential of the active material is 0.4 V (vs. Li / Li+) or more. In the pore size distribution measured by mercury porosimetry, there are a first peak having a mode diameter of 0.01 μm to 0.1 μm and a second peak having a mode diameter of more than 0.2 μm and 1 μm or less. The volume of the pores measured by the mercury intrusion porosimetry is 0.1 mL to 0.3 mL per 1 g of the electrode weight (the weight excluding the current collector).

Description

[0001] This application is based on Japanese patent application 2011-250549 (filing date: 11 / 16 / 2011), and enjoys the priority of this application. This application refers to this application and includes the entire content of this application. technical field [0002] Embodiments of the present invention relate to electrodes, nonaqueous electrolyte batteries, and battery packs. Background technique [0003] Non-aqueous electrolyte batteries such as lithium-ion secondary batteries are widely used in various fields such as electric vehicles, electric storage, and information equipment as high-energy-density batteries. Along with this, the demand from the market has further increased, and research has been actively carried out. [0004] Among them, non-aqueous electrolyte batteries used as power sources for electric vehicles require high energy density, that is, high discharge capacity per unit weight or unit volume, due to their application. Therefore, in order to regenerat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/131H01M4/485H01M10/0525H01M50/105
CPCH01M4/131H01M10/0525H01M2004/021H01M4/485Y02E60/10H01M50/105Y02T10/70
Inventor 岩崎拓哉稻垣浩贵安田一浩保科圭吾石桥充吉田赖司高见则雄
Owner KK TOSHIBA
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