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Electrode, secondary battery, battery pack and vehicle

A technology of electrodes and active material layers, applied in secondary batteries, secondary battery repair/maintenance, non-aqueous electrolyte batteries, etc., to achieve excellent cycle performance

Pending Publication Date: 2021-03-16
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrode contains a layer containing the active material

Method used

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  • Electrode, secondary battery, battery pack and vehicle
  • Electrode, secondary battery, battery pack and vehicle
  • Electrode, secondary battery, battery pack and vehicle

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0028] According to an embodiment, an electrode is provided. The electrode includes an active material-containing layer. The active material-containing layer includes active material, inorganic solid particles and carbon fibers. The active material contains a titanium-containing composite oxide. Inorganic solid particles have lithium ion conductivity. The active material-containing layer shows the first peak representing the maximum logarithmic differential pore volume in the logarithmic differential pore volume distribution curve obtained by the mercury intrusion porosimetry. The pore diameter PD of the first peak is not less than 0.01 μm and not more than 0.1 μm. The full width at half maximum of the first peak is 0.05 μm or less.

[0029] In the active material-containing layer of the electrode according to the embodiment, an active material, inorganic solid particles having lithium ion conductivity, and carbon fibers are mixed. Lithium ion conductivity of the active m...

no. 2 Embodiment approach

[0082] According to the second embodiment, there is provided a secondary battery including a negative electrode, a positive electrode, and an electrolyte. At least one of the negative electrode and the positive electrode is the electrode according to the first embodiment. When either the negative electrode or the positive electrode is the electrode according to the first embodiment, the counter electrode may have a configuration different from that of the first embodiment.

[0083] The secondary battery according to the second embodiment may further include a separator arranged 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.

[0084] In addition, the secondary battery according to the second embodiment may further include an exterior member for accommodating the electrode group and the electrolyte.

[0085] Furthermor...

no. 3 Embodiment approach

[0146] 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.

[0147] In the assembled battery according to the third embodiment, the individual cells may be arranged electrically connected in series or in parallel, or may be arranged in combination of series connection and parallel connection.

[0148] Next, an example of the assembled battery according to the third embodiment will be described with reference to the drawings.

[0149] Figure 7 It is a perspective view schematically showing an example of the assembled battery according to the third embodiment. Figure 7 The assembled battery 200 shown in the figure includes five single cells 100a to 100e, four bus bars 21, a positive electrode side lead 22, and a negative electrode side lead 23. Each of the five single cells 100a to 100e is a secondary battery according to the ...

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Abstract

The invention relates to an electrode, a secondary battery, a battery pack, and a vehicle. The present invention provides an electrode having excellent input / output performance and cycle performance,and a secondary battery, a battery pack, and a vehicle provided with the electrode. According to an embodiment, an electrode is provided. The electrode includes an active material-containing layer. The active material-containing layer contains an active material, inorganic solid particles, and carbon fibers. The active material includes a titanium-containing composite oxide. The inorganic solid particles have lithium ion conductivity. The active material-containing layer exhibits a first peak indicating the maximum logarithmic differential pore volume in a logarithmic differential pore volumedistribution curve obtained by a mercury intrusion method. The pore diameter PD of the first peak is 0.01 [mu] m or more and 0.1 [mu]m or less. The full width at half maximum of the first peak is 0.05[mu]m or less.

Description

technical field [0001] The present invention relates to an electrode, a secondary battery, a battery pack and a vehicle. Background technique [0002] A lithium ion secondary battery such as a nonaqueous electrolyte secondary battery is a rechargeable battery in which lithium ions are charged and discharged by moving lithium ions between a positive electrode and a negative electrode. The positive electrode and the negative electrode hold a nonaqueous electrolyte containing lithium ions. Non-aqueous electrolyte secondary batteries are expected to be used as medium and large power sources such as vehicle-mounted applications and stationary applications, in addition to their use as power sources for small electronic devices. Especially in applications as medium and large power supplies, input / output performance and cycle performance are required. [0003] As a method of improving the input / output performance and cycle performance of a secondary battery, it has been reported t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/62H01M4/131H01M10/0525H01M10/0587
CPCH01M4/362H01M4/485H01M4/62H01M4/131H01M10/0525H01M10/0587H01M2220/20H01M4/625H01M2004/021H01M10/0562H01M10/058Y02P70/50Y02E60/10H01M2300/0068H01M2300/0071H01M10/425H01M2010/4271
Inventor 草间知枝笹川哲也吉间一臣杉崎知子张文原田康宏高见则雄
Owner KK TOSHIBA
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