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Electrode structure and secondary battery

An electrode structure, electrode technology

Active Publication Date: 2020-01-10
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The electrode contains a layer containing the active material

Method used

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  • Electrode structure and secondary battery
  • Electrode structure and secondary battery
  • Electrode structure and secondary battery

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0034] The electrode structure according to the first embodiment includes an electrode and a separator. The electrode includes an active material-containing layer. The separator includes an organic fiber layer provided on a main surface of the active material-containing layer. The organic fiber layer contains a plurality of organic fibers and resin masses. The resin block is in contact with a part of the main surface of the active material-containing layer. In addition, the resin block is integrated with a part of a plurality of organic fibers. In addition, the length of one side of the circumscribed quadrilateral of the resin block and the length of the side adjacent to one side are each 10 μm or more.

[0035] The organic fiber layer of the electrode structure according to one embodiment contains a resin mass having a relatively large width of 10 μm or more. The resin mass is deposited on a part of the main surface of the active material-containing layer in a state of be...

no. 2 Embodiment approach

[0169] According to the second embodiment, there is provided a secondary battery including the electrode structure according to the first embodiment, a counter electrode, and an electrolyte.

[0170] The electrode structure and the counter electrode can constitute an electrode group. Electrolyte can be held in the electrode group. Furthermore, the secondary battery according to the second embodiment may further include an independent film-type separator disposed between the electrode structure and the counter electrode.

[0171] In addition, the secondary battery according to the second embodiment may further include an exterior member for accommodating the electrode group and the electrolyte.

[0172] In addition, the secondary battery according to the second embodiment may further include a negative terminal electrically connected to the negative electrode and a positive terminal electrically connected to the positive electrode.

[0173] The secondary battery according to ...

Embodiment 1

[0210] First, except that the raw material solution LM1 was changed to the raw material solution LM2 and the diameter of the organic fibers was changed from 0.4 μm to 1.2 μm, deposits of organic fibers were placed on the negative electrode in the same manner as in Comparative Example 1.

[0211] As the raw material solution LM2, a solution obtained by dissolving polyamide (PA) in N,N-dimethylacetamide (DMAc) was used. The concentration of PA in the raw material solution was set to 20% by mass.

[0212] Next, droplets were applied by electrospray deposition on the organic fiber deposit on the negative electrode to form a resin mass. Specifically, the raw material solution LM2 was supplied to an electrospray device, and droplets were applied to the deposit of organic fibers on the negative electrode. At this time, the supply rate of the raw material solution was set to 100 μl / min, and the distance between the spinning nozzle and the surface of the layer containing the negative ...

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Abstract

The embodiments of the invention relate to an electrode structure and a secondary battery. Provided are an electrode structure and a secondary battery which are capable of suppressing the occurrence of an internal short circuit. According to one embodiment, an electrode structure is provided. The electrode structure includes an electrode and a separator. The electrode includes an active material-containing layer. The separator includes a layer provided on a main surface of the active material-containing layer. The layer includes organic fibers and a resin mass. The resin mass is in contact with a portion of the main surface of the active material-containing layer. The resin mass is integrated with a portion of the organic fibers. When a length of the resin mass is represented by a circumscribed quadrilateral of the resin mass, a length of a first side of the circumscribed quadrilateral and a length of a second side adjacent to the first side are each 10 [mu]m or more.

Description

technical field [0001] Embodiments of the present invention relate to an electrode structure and a secondary battery. Background technique [0002] In secondary batteries such as lithium ion secondary batteries, porous separators have been used in order to avoid contact between positive and negative electrodes. Usually, the separator is prepared as an independent film separated from the electrode body (positive electrode and negative electrode). The separator is arranged between the positive electrode and the negative electrode to form an electrode group, which is wound or laminated to form a battery. [0003] A typical separator includes a porous film made of a polyolefin resin film. Such a separator can be produced, for example, by extrusion molding a melt containing a polyolefin-based resin composition into a sheet, extracting and removing substances other than the polyolefin-based resin, and stretching the sheet. [0004] However, since a separator made of a resin fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M4/13H01M10/0525H01M4/02H01M10/36H01M50/414H01M50/429
CPCH01M4/13H01M10/0525H01M2200/30H01M50/44H01M50/46H01M50/429H01M50/414H01M10/052Y02E60/10H01M50/4295H01M50/461
Inventor 德野阳子植松育生
Owner KK TOSHIBA
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