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Bipolar all-solid-state battery

An all-solid battery and bipolar electrode technology, which is applied to batteries with bipolar electrodes, electrode carriers/collectors, lithium batteries, etc., can solve problems such as short circuits, and achieve the effect of preventing damage and preventing short circuits

Active Publication Date: 2014-01-29
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Here, since the bipolar battery has a structure in which a plurality of bipolar electrodes are stacked, there is a problem that there is an electrode active material layer due to contact between current collectors and irregularities at the ends of the bipolar electrodes. Possibility of short circuit due to contact with current collector

Method used

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Examples

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Embodiment

[0105] Examples are shown below to further describe the present invention in detail.

[0106] A SUS304 foil with a thickness of 10 μm was prepared as a current collector, and a PEN film with a thickness of 12 μm was bonded to the outer periphery of the SUS304 foil by thermocompression as a reinforcing layer. It should be noted that the reinforcing layer was bonded to both surfaces of the current collector by thermocompression.

[0107] Next, the LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 (positive active material), 75Li 2 S-25P 2 S 5 (solid electrolyte), butene rubber (manufactured by JSR Corporation) (bonding material), and heptane (solvent) were mixed at a mass ratio of positive electrode active material:solid electrolyte:binding material:heptane=47:16:1:36 , kneaded to form a slurry, and the reinforcement layer was formed on the inner side of the end of the positive electrode active material layer, coated on the current collector and dried to obtain a positive electrode with a thick...

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Abstract

The present invention addresses the problem of providing: a bipolar all-solid-state battery wherein breakage of a collector of a bipolar electrode is prevented, thereby suitably preventing the occurrence of a short circuit; and a method for manufacturing the bipolar all-solid-state battery. The present invention solves the above-described problem by providing a bipolar all-solid-state battery which comprises: a bipolar electrode that comprises a collector and an electrode active material layer which is composed of a positive electrode active material layer that is formed on one surface of the collector and contains a positive electrode active material and a negative electrode active material layer that is formed on the other surface of the collector and contains a negative electrode active material; and a solid electrolyte layer that contains a solid electrolyte, in said bipolar all-solid-state battery, a plurality of the bipolar electrodes being laminated with the solid electrolyte layer interposed between each two of the bipolar electrodes. The bipolar all-solid-state battery is characterized in that the electrode active material layer is formed inside the end portions of the collector and a reinforcing layer, which is formed on the surface of the collector, is arranged between each end portion of the electrode active material layer and the surface of the collector.

Description

technical field [0001] The present invention relates to a bipolar all-solid-state battery capable of well preventing a short circuit due to damage of a current collector of a bipolar electrode and a method for manufacturing the same. Background technique [0002] With the rapid spread of information-related equipment such as personal computers, video cameras, and mobile phones, and communication equipment in recent years, attention has been paid to the development of batteries used as their power sources. In addition, in the automobile industry and the like, development of high-output and high-capacity batteries for electric vehicles or hybrid vehicles is also underway. Currently, among various batteries, lithium batteries are attracting attention from the viewpoint of high energy density. [0003] Currently commercially available lithium batteries use an electrolyte solution containing a flammable organic solvent, so it is necessary to install a safety device that suppress...

Claims

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Application Information

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IPC IPC(8): H01M10/0585H01M4/13H01M10/0562
CPCY02E60/12H01M10/0562Y02E60/122H01M10/4235H01M4/70Y02T10/7011H01M10/0463H01M10/052H01M10/0418H01M10/0585Y02P70/50Y02E60/10H01M4/13H01M10/127H01M10/282H01M10/18Y02T10/70
Inventor 田中拓海
Owner TOYOTA JIDOSHA KK
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