# US 10,770,757 B2 · Manufacturing method of electrode assembly

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- Number: US 10,770,757 B2
- Document ID: US10770757B2
- Status: Granted
- Kind: B2
- Application number: 15/764,260
- Filed: 2016-09-26
- Published: 2018-09-20
- Granted: 2020-09-08
- Earliest claimed: 2015-10-23
- Assignees: Seiko Epson Corporation
- Applicants: Seiko Epson Corporation
- Inventors: Tsutomu Teraoka; Tomofumi Yokoyama; Hitoshi Yamamoto; Tomoyuki Okuyama
- Web page: https://patentgrep.com/patent/US10770757B2

## CPC

- H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
- H01M 4/0471: {involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis}
- H01M 4/0483: {by methods including the handling of a melt (H01M4/0438, take precedence)}
- H01M 4/06: Electrodes for primary cells
- H01M 4/08: Processes of manufacture
- H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M 4/139: Processes of manufacture
- H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M 4/621: {Binders}
- H01M 6/18: with solid electrolyte
- H01M 10/052: Li-accumulators
- H01M 10/0562: Solid materials
- H01M 50/147: Lids or covers
- H01M 2004/027: {Negative electrodes}
- H01M 2004/028: {Positive electrodes}
- H01M 2300/0068: inorganic
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A manufacturing method of an electrode assembly capable of easily manufacturing a configuration in which an electrolyte and an active material are bonded to each other is provided. A step of supplying, solidifying, and crystallizing a solid electrolyte 22 including Li2+XC1−XBXO3 (X represents a real number equal to or greater than 0 and smaller than 1), so as to be in contact with an active material aggregate 12 including a communication hole 14 between active material particles 13, is included. In a case where the solid electrolyte 22 is melted, the solid electrolyte 22 is heated in a range of 650 degrees to 900 degrees.

## Claims

### Claim 1

A manufacturing method of an electrode assembly, the method comprising:
a first step of forming an active material formed body including a communication hole;
a second step of providing a solid material including Li2+XC1−XBXO3 (X represents a real number exceeding 0 and equal to or smaller than 1) on the active material formed body without using a solvent;
a third step of melting the solid material; and
a fourth step of rapidly cooling and solidifying a molten material of the solid material,
wherein the communication hole is filled with the molten material in the third step, and
a cooling speed for rapidly cooling the molten material of the solid material is 102 degree/sec to 105 degree/sec in the fourth step.

### Claim 2 (depends on 1)

The manufacturing method of an electrode assembly according to claim 1, wherein the solid material is heated at a temperature of 650° C. to 900° C. in the third step.

### Claim 3 (depends on 1)

The manufacturing method of an electrode assembly according to claim 1, wherein X in the Li2+XC1−XBXO3 is 0.2 to 0.6.

### Claim 4 (depends on 1)

The manufacturing method of an electrode assembly according to claim 1, wherein the amount of the solid material is an amount with which a layer can be formed on the active material formed body after the solidification.