All-solid-state battery comprising symmetrically arranged reference electrodes, device for producing the same, and manufacturing method using the device

Patent metadata

Field	Value
Publication number	US-2023207866-A1
Application number	US-202217962959-A
Country	US
Kind code	A1
Filing date	Oct 10, 2022
Priority date	Dec 24, 2021
Publication date	Jun 29, 2023
Grant date	—

Abstract

Disclosed are an all-solid-state battery including symmetrically arranged reference electrodes, a device for manufacturing the same, and a method of manufacturing using same.

First claim

What is claimed is:

1 . An all-solid-state battery comprising:
a cathode layer; an anode layer; a solid electrolyte layer interposed between the cathode layer and the anode layer, wherein the cathode layer, the anode layer and the solid electrolyte layer are stacked in a thickness direction; and at least two pairs of reference electrodes inserted laterally into the solid electrolyte layer in a direction perpendicular to the thickness direction, the at least two pairs of the reference electrodes symmetrically arranged with respect to a center point of the solid electrolyte layer.

2 . The all-solid-state battery according to claim 1 , wherein each of the reference electrodes comprises (i) an electric wire comprising one or more selected from the group consisting of tungsten (W), aluminum (Al), nickel (Ni), and stainless steel (SUS), and a (ii) a coating comprising one or more selected from the group consisting of gold (Au), silver (Ag), and platinum (Pt).

3 . The all-solid-state battery according to claim 1 , wherein the at least two pairs of reference electrodes are inserted at right angles to each other.

4 . The all-solid-state battery according to claim 1 , wherein a number of the reference electrodes is represented by 2n, wherein n is an integer of 1 or greater.

5 . A device for manufacturing an all-solid-state battery, the device comprising:
a mold comprising a first hole having the same shape and width as those of the all-solid-state battery and penetrating therethrough in a vertical direction, and a plurality of second holes configured to communicate with the first hole at a side surface thereof; a first presser comprising a protruding member corresponding to the first hole, the first presser fitted into a top of the mold and configured to press a raw material of the all-solid-state battery filling the first hole in an upper part; a second presser comprising a protruding member corresponding to the first hole, the second presser fitted into a bottom of the mold and pressing a raw material of the all-solid-state battery filling the first hole in a lower part; and at least two pairs of second holes symmetrically arranged with respect to a center point of the first hole.

6 . The device according to claim 5 , wherein the mold further comprises an insulating member on a surface of the first hole.

7 . The device according to claim 5 , wherein the mold further comprises an insulating member on a surface of the second hole.

8 . The device according to claim 5 , wherein one pair of second holes form a right angle with another pair of second holes.

9 . The device according to claim 5 , wherein the first presser and the second presser comprise a conductive material.

10 . A method of manufacturing an all-solid-state battery comprising a reference electrode using a device according to claim 5 , comprising:
coupling the second presser to the bottom of the mold so as to fit the protruding member of the second presser into the first hole; injecting a first solid electrolyte powder onto the protruding member of the second presser; coupling the first presser to the top of the mold so as to fit the protruding member of the first presser into the first hole and pressing the first solid electrolyte powder to form a first solid electrolyte layer; detaching the first presser therefrom and inserting a plurality of reference electrodes through the second hole to load the reference electrodes on the first solid electrolyte layer; injecting a second solid electrolyte powder onto the reference electrodes; coupling the first presser to the top of the mold so as to fit the protruding member of the first presser into the first hole and pressing the second solid electrolyte powder to form a second solid electrolyte layer; detaching the first presser therefrom and loading an anode layer on the second solid electrolyte layer; detaching the second presser therefrom and loading a cathode layer on the first solid electrolyte layer; and pressing a structure in the first hole using the mold, the first presser, and the second presser together.

11 . The method according to claim 10 , wherein the first solid electrolyte powder and the second solid electrolyte powder comprise a sulfide-based solid electrolyte.

12 . The method according to claim 10 , wherein the reference electrode comprises an electric wire containing one or more selected from the group consisting of tungsten (W), aluminum (Al), nickel (Ni), and stainless steel (SUS), and a coating comprising one more selected from the group consisting of gold (Au), silver (Ag), and platinum (Pt).

13 . The method according to claim 10 , further comprising inserting a stopper into the second hole so as not to expose the structure in the first hole to the outside through the second hole.

14 . A method of manufacturing an all-solid-state battery comprising a reference electrode using a device according to claim 5 , comprising:
coupling the second presser to the bottom of the mold so as to fit the protruding member of the second presser into the first hole; loading an anode layer onto the protruding member of the second presser; injecting a first solid electrolyte powder onto the anode layer; coupling the first presser to the top of the mold so as to fit the protruding member of the first presser into the first hole and pressing the first solid electrolyte powder to form a first solid electrolyte layer; detaching the first presser therefrom and inserting a plurality of reference electrodes through the second hole to load the reference electrodes on the first solid electrolyte layer; injecting a second solid electrolyte powder onto the reference electrodes; coupling the first presser to the top of the mold so as to fit the protruding member of the first presser into the first hole and pressing the second solid electrolyte powder to form a second solid electrolyte layer; detaching the first presser therefrom and loading an anode layer on the second solid electrolyte layer; and pressing a structure in the first hole using the mold, the first presser, and the second presser together.

15 . The method according to claim 14 , wherein the first solid electrolyte powder and the second solid electrolyte powder comprise a sulfide-based solid electrolyte.

16 . The method according to claim 14 , wherein the reference electrode comprises an electric wire comprising one or more selected from the group consisting of tungsten (W), aluminum (Al), nickel (Ni), and stainless steel (SUS), and a coating comprising one or more noble metals selected from the group consisting of gold (Au), silver (Ag), and platinum (Pt).

17 . The method according to claim 14 , further comprising inserting a stopper into the second hole so as not to expose the structure in the first hole to the outside through the second hole.

18 . A vehicle comprising an all-solid-state battery according to claim 1 .

Assignees

• Hyundai Motor Co Ltd
• Kia Corp
• Institute For Research & Industry Cooperation Pusan National Univ

Inventors

• Ha A Reum
• Seong Ju Yeong
• Song In Woo
• Min Hong Seok
• Yoon Yong Sub
• Kim Yun Sung
• Kim In Chul
• Jang Yong Jun
• Noh Sung Woo
• Shin Heon Cheol
• Joe Gi Hwan
• Min Yu Jeong
• Jeong Ji Ung
• Ha Seong Hyeok

Classifications

• H01M2300/0068

  inorganic · CPC title

• H01M10/058

  Construction or manufacture · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M10/0562 Primary

  Solid materials · CPC title

• H01M10/0585

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