Manufacturing method of electrode assembly

Patent metadata

Field	Value
Publication number	US-2018269532-A1
Application number	US-201615764260-A
Country	US
Kind code	A1
Filing date	Sep 26, 2016
Priority date	Oct 23, 2015
Publication date	Sep 20, 2018
Grant date	—

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. A step of supplying, solidifying, and crystallizing a solid electrolyte including Li 2+X C 1−X B X O 3 (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 including a communication hole between active material particles, is included. In a case where the solid electrolyte is melted, the solid electrolyte is heated in a range of 650 degrees to 900 degrees.

First claim

1 . A manufacturing method of an electrode assembly, the method comprising:
a first step of forming an active material aggregate including a communication hole; a second step of providing a solid material including Li 2+X C 1−X B X O 3 (X represents a real number exceeding 0 and equal to or smaller than 1) on the active material aggregate; a third step of melting the solid material; and a fourth step of solidifying and crystallizing a molten material of the solid material, wherein the communication hole is filled with the molten material in the third step.

2 . 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.

3 . The manufacturing method of an electrode assembly according to claim 1 ,
wherein X in the Li 2+X C 1−X B X O 3 is 0.2 to 0.6.

4 . 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 aggregate after the solidification and crystallization.

5 - 7 . (canceled)

8 . 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 Li 2+X C 1−X B X O 3 (X represents a real number exceeding 0 and equal to or smaller than 1) on the active material formed body; 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.

9 . The manufacturing method of an electrode assembly according to claim 8 ,
wherein a cooling speed for rapidly cooling the molten material of the solid material is 10 2 degree/sec to 10 5 degree/sec in the fourth step.

10 . The manufacturing method of an electrode assembly according to claim 8 ,
wherein the solid material is heated at a temperature of 650° C. to 900° C. in the third step.

11 . The manufacturing method of an electrode assembly according to claim 8 ,
wherein X in the Li 2+X C 1−X B X O 3 is 0.2 to 0.6.

12 . The manufacturing method of an electrode assembly according to claim 8 ,
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.

13 - 15 . (canceled)

Assignees

• Seiko Epson Corp

Inventors

• Teraoka Tsutomu
• Yokoyama Tomofumi
• Yamamoto Hitoshi
• Okuyama Tomoyuki

Classifications

• H01M6/18

  with solid electrolyte · CPC title

• H01M4/0483

  by methods including the handling of a melt (H01M4/0438, take precedence) · CPC title

• H01M10/0585 Primary

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M10/0562

  Solid materials · CPC title

• H01M10/052

  Li-accumulators · CPC title