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Method for producing electrode for solid-state batteries

A solid battery and manufacturing method technology, applied in the direction of electrode manufacturing, battery electrode, electrolyte battery manufacturing, etc., can solve the problems of battery temperature rise, battery adverse effects, etc., and achieve the effect of reducing electronic resistance

Active Publication Date: 2020-02-11
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When a battery used as a power supply for vehicles, personal computers, portable terminals, etc. is misused due to internal short circuit, overcharge, etc., the temperature of the battery as a whole rises, which may adversely affect the battery itself and the equipment using the battery.

Method used

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  • Method for producing electrode for solid-state batteries
  • Method for producing electrode for solid-state batteries
  • Method for producing electrode for solid-state batteries

Examples

Experimental program
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Effect test

no. 1 approach

[0080] Such as figure 2 As shown, the first embodiment of the manufacturing method of the present disclosure has at least two pressing processes: pressing process A1 of pressing the current collector formed with the PTC resistor layer; and pressing the electrode active material having at least the electrode active material layer Pressing process B in which the component is pressed.

[0081] 2-1. Process of forming PTC resistor layer

[0082] In the step of forming the PTC resistor layer of the first embodiment, the slurry containing the conductive material and the polymer is coated on at least one surface of the current collector and then dried to form the PTC resistor layer.

[0083] (1) Slurry

[0084] The paste contains conductive material and polymer.

[0085] The method of drying the slurry after coating the current collector to form the PTC resistor layer is not particularly limited, and generally, the conductive material and the polymer are dispersed in a non-aqueou...

no. 2 approach

[0127] Such as image 3 As shown, the second embodiment of the manufacturing method of the present disclosure has at least two pressing processes: the pressing process B of pressing the electrode active material member having at least the electrode active material layer 3 with a maximum pressure of b; and A pressing step A2 of pressing the electrode precursor having at least the current collector 2 , the electrode active material layer 3 and the PTC resistor layer 1 with a maximum pressure of a2 .

[0128] The first embodiment and the second embodiment are common in the following aspects: having at least two pressing processes; having the pressing process B of pressing an electrode active material member having at least an electrode active material layer; and The aspect in which the maximum pressure b1 applied to the electrode active material layer is greater than the maximum pressure applied to the PTC resistor body layer (a1 and a2).

[0129] On the other hand, in the step ...

Embodiment 1

[0153] (1-1) Step of forming PTC resistor layer

[0154] Furnace black (manufactured by Tokai Carbon Co., Ltd.) with an average primary particle size of 66 nm as a conductive material, alumina (particle size D90: 6 μm) as an insulating inorganic substance, and PVDF (Kureha Co., Ltd.) as a polymer were prepared. Made KF Polymer L #9130). These were mixed with N-methylpyrrolidone as a solvent so as to have a volume ratio of furnace black:PVDF:alumina=10:30:60 to prepare a slurry. Thereafter, the slurry was coated on an aluminum foil having a thickness of 15 μm, and dried in a stationary drying oven at 100° C. for 1 hour to form a PTC resistor layer.

[0155] (1-2) Pressing process A1

[0156] The current collector on which the PTC resistor layer was formed was rolled under conditions of a pressing pressure a1 of 5.6 kN / cm (converted value 199 MPa) and room temperature to obtain a PTC resistor layer-current collector laminate.

[0157] (1-3) Pressing process B, etc.

[0158] Li...

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Abstract

The invention relates to a method for producing an electrode for solid-state batteries, which comprises a step of forming a PTC resistor layer by applying a slurry containing an electroconductive material and a polymer to at least one of both surfaces of a current collector and drying the applied slurry; a step of pressing the current collector on which the PTC resistor layer is formed, at a maximum pressure a1 (pressing A1); a step of pressing an electrode active material member comprising at least the electrode active material layer and excluding the PTC resistor layer, at a maximum pressureb (pressing B); and a step of obtaining the electrode for solid-state batteries by laminating the current collector on which the PTC resistor layer is formed and the electrode active material memberso that the PTC resistor layer and the electrode active material layer are in contact with each other, wherein the maximum pressure applied in the pressing B and the maximum pressure applied in the pressing A1 satisfy the following relation: b>a1.

Description

technical field [0001] The present disclosure relates to a method of manufacturing an electrode for a solid battery. Background technique [0002] When batteries used as power supplies for vehicles, personal computers, mobile terminals, etc. are misused such as internal short circuit or overcharge, the temperature of the battery as a whole rises, which may adversely affect the battery itself and the equipment using the battery. [0003] As a countermeasure against such misuse, a technique using an electrode having a positive temperature coefficient (Positive Temperature Coefficient; PTC) resistor layer having electron conductivity at normal temperature has been attempted. , and the electronic resistance (electronic resistance) value sharply increases when the temperature rises due to misuse. [0004] Patent Document 1 discloses an all-solid battery, comprising: a positive electrode layer, the positive electrode layer has a positive electrode active material layer and a posi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/34H01M4/04H01M10/42
CPCH01M4/0404H01M4/0435H01M10/4235H01M2200/106H01M50/581H01M4/13H01M4/139H01M4/667H01M4/668H01M4/043H01M4/366H01M10/058H01M10/0562H01M10/0525
Inventor 尾濑徳洋铃木知哉长谷川元八十和夫西村英晃松下祐贵
Owner TOYOTA JIDOSHA KK
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