US-20260128381-A1 - ALL-SOLID-STATE BATTERY AND METHOD FOR MANUFACTURING ALL-SOLID-STATE BATTERY

US20260128381A1US 20260128381 A1US20260128381 A1US 20260128381A1US-20260128381-A1

Abstract

An all-solid-state battery includes a plurality of first electrodes, each first electrode including a first electrode current collector including a first electrode body and a first electrode tab, and a first electrode active material disposed on the first electrode current collector, a plurality of second electrodes having a polarity different from a polarity of the plurality of first electrodes, and alternately stacked with the plurality of first electrodes in a first direction, each second electrode including a second electrode current collector including a second electrode body and a second electrode tab, and a second electrode active material disposed on the second electrode current collector, and a solid electrolyte interposed between each first electrode and each second electrode.

Inventors

Sung Ju CHO
Ju Min Kim
Jong Hwan Choi
Yong Hun Lee
Hyun Geun Kwon
Yong Jun Lee
Tae Young Kwon
Yoon Seon Kim

Assignees

HYUNDAI MOTOR COMPANY
KIA CORPORATION

Dates

Publication Date: 20260507
Application Date: 20250818
Priority Date: 20241105

Claims (17)

1 . An all-solid-state battery comprising: a plurality of first electrodes, each first electrode including a first electrode current collector including a first electrode body and a first electrode tab, and a first electrode active material disposed on the first electrode current collector; a plurality of second electrodes having a polarity different from a polarity of the plurality of first electrodes, and alternately stacked with the plurality of first electrodes in a first direction, each second electrode including a second electrode current collector including a second electrode body and a second electrode tab, and a second electrode active material disposed on the second electrode current collector; and a solid electrolyte interposed between each first electrode and each second electrode, wherein each first electrode tab and each second electrode tab protrude from the first electrode body and the second electrode body, respectively, in a second direction crossing the first direction, and wherein a part, in which the first electrode tabs of the plurality of first electrodes make contact with each other, or a part, in which the second electrode tabs of the plurality of second electrodes make contact with each other, is spaced apart in the first direction from the first electrode or the second electrode, which is positioned at opposite ends, which are disposed in the first direction, of the plurality of first electrodes and the plurality of second electrodes.
2 . The all-solid-state battery of claim 1 , wherein the first electrode tabs of the plurality of first electrodes make contact with each other at one side of the first electrode body and the second electrode body in the second direction, and wherein the second electrode tabs of the plurality of second electrodes make contact with an opposite side of the first electrode body and the second electrode body in the second direction.
3 . The all-solid-state battery of claim 2 , wherein the first electrode active material has an area greater than an area of the second electrode active material.
4 . The all-solid-state battery of claim 2 , further including: an edge member disposed along a circumference of the second electrode active material to make contact with the second electrode tab.
5 . The all-solid-state battery of claim 1 , wherein the first electrode is disposed as an anode, and wherein the second electrode is disposed as a cathode.
6 . A method for providing an all-solid-state battery, the method comprising: stacking, in a first direction, at least one first electrode, at least one second electrode disposed to have a polarity different from a polarity of the at least one first electrode, and at least one solid electrolyte interposed between the at least one first electrode and the at least one second electrode; stacking the at least one first electrode, the at least one second electrode, and the at least one solid electrolyte, on a jig plate and packing a result structure using an exterior material; and pressing the at least one first electrode, the at least one solid electrolyte, the at least one second electrode, which are stacked on each other, which are packed, in the first direction, wherein the first electrode includes: a first electrode current collector including a first electrode body and a first electrode tab protruding from the first electrode body, in a second direction crossing the first direction, wherein the second electrode includes: a second electrode current collector including a second electrode body and a second electrode tab protruding from the second electrode body in the second direction, and wherein the at least one first electrode, the at least one second electrode, and the at least one solid electrolyte are stacked on the jig plate and the first electrode tab and the second electrode tab are spaced apart from the jig plate in the first direction.
7 . The method of claim 6 , wherein opposite ends, which are disposed in the second direction, of the jig plate are disposed inwardly from opposite ends, which are disposed in the second direction, of the first electrode body in the second direction, or disposed at positions in line with positions of the opposite ends, which are disposed in the second direction, of the first electrode body, in the first direction.
8 . The method of claim 6 , wherein each of opposite ends, which are disposed in the second direction, of the jig plate is disposed between each of opposite ends, which are disposed in the second direction, of the first electrode body, and each of opposite ends, which are disposed in the second direction, of the second electrode body.
9 . The method of claim 6 , wherein the packing of the at least one first electrode, the at least one solid electrolyte, the at least one second electrode, using the exterior material includes: additionally disposing a protective film between the jig plate, and the first electrode or the second electrode, which is positioned at one end portion, which is disposed in the first direction, of the at least one first electrode and the at least one second electrode, and packing the protective film together with the at least one first electrode, the at least one solid electrolyte and the at least one second electrode using the exterior material.
10 . The method of claim 9 , wherein opposite ends, which are disposed in the second direction, of the protective film are disposed outwardly from opposite ends, which are disposed in the second direction, of the jig plate in the second direction, or disposed at positions in line with positions of the opposite ends, which are disposed in the second direction, of the jig plate, in the first direction.
11 . The method of claim 6 , wherein the packing of the at least one first electrode, the at least one solid electrolyte, the at least one second electrode, using the exterior material further includes: packing an internal exterior material and the jig plate together using the exterior material so that the internal exterior material and the jig plate are surrounded by the exterior material, after surrounding the at least one first electrode, the at least one solid electrolyte, and the at least one second electrode by the internal exterior material.
12 . The method of claim 6 , wherein the jig plate includes: a jig plate body; and a jig plate cover disposed at opposite sides of the jig plate body in the second direction, and wherein the jig plate cover includes an elastic member.
13 . The method of claim 12 , wherein opposite ends, which are disposed in the second direction, of the jig plate are disposed inwardly from opposite ends, which are disposed in the second direction, of the first electrode body in the second direction, or disposed at positions in line with positions of the opposite ends, which are disposed in the second direction, of the first electrode body, in the first direction.
14 . The method of claim 12 , wherein each of opposite ends, which are disposed in the second direction, of the jig plate cover are interposed between each of opposite ends, which are disposed in the second direction, of the first electrode body and each of opposite ends, which are disposed in the second direction, of the second electrode body.
15 . The method of claim 6 , further comprising: unpacking the exterior material packed, after pressing the at least one first electrode, the at least one solid electrolyte, and the at least one second electrode, which are packed, and additionally stacking a plurality of first electrodes, a plurality of solid electrolytes, and a plurality of second electrodes.
16 . The method of claim 15 , further comprising: bringing first electrode tabs of the plurality of first electrodes into contact with each other and bonding the first electrode tabs to a first lead and bringing second electrode tabs of the plurality of second electrodes into contact with each other and bonding the second electrode tabs to a second lead, after stacking the plurality of first electrodes, the plurality of solid electrolytes, and the plurality of second electrodes.
17 . The method of claim 16 , further comprising: packing the plurality of first electrodes, the plurality of solid electrolytes, and the plurality of second electrodes, which are stacked, using a post exterior material.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present application claims the benefit of priority to Korean Patent Application No. 10-2024-0155651, filed in the Korean Intellectual Property Office on Nov. 5, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present disclosure relates to an all-solid-state battery and a method for manufacturing an all-solid-state battery. BACKGROUND A secondary battery, which is repeatedly rechargeable unlike a primary battery which is not able to be charged after discharged, is applicable to various fields such as a smartphone, a vehicle, a drone, and a robot, and the importance of the second battery has been increased day by day. As a second battery according to the related art employs a liquid electrolyte, the second battery is expanded due to the change in temperature, or a leakage from the second battery is caused due to an external impact to cause an explosion or a fire, degrading stability. To solve such a problem, studies and researches have been actively performed on an all-solid-state battery. As an all-solid-state battery includes a solid electrolyte between a cathode active material and an anode active material, the all-solid-state battery has a higher stability in structure, such that a separator is not required. Accordingly, the all-solid-state battery may be implemented in smaller size and may have a higher energy density. However, in the all-solid-state battery, the electrode active material is expanded and shrunken in a charging/discharging operation. Accordingly, the interface between the electrode active material and the solid electrolyte is de-laminated to degrade the performance of the all-solid-state battery. Accordingly, to prevent the interface between the electrode active material and the solid electrolyte from being de-laminated, an isostatic pressing process may be performed with respect to the all-solid-state battery. In the instant case, the structure to prevent an electrode tab of an electrode current collector from being broken in the isostatic pressing process has been increasingly required. SUMMARY The present disclosure has been made to solve the above-mentioned problems occurring in the related art while advantages achieved by the related art are maintained intact. An aspect of the present disclosure provides an all-solid-state battery, configured for preventing an electrode tab from being broken in an isostatic pressing process, and a method for manufacturing all-solid-state battery. The technical problems to be solved by the present disclosure are not limited to the aforementioned problems, and any other technical problems not mentioned herein will be clearly understood from the following description by those skilled in the art to which the present disclosure pertains. According to an aspect of the present disclosure, an all-solid-state battery includes a plurality of first electrodes, each first electrode including a first electrode current collector including a first electrode body and a first electrode tab, and a first electrode active material disposed on the first electrode current collector, a plurality of second electrodes having a polarity different from a polarity of the plurality of first electrodes, and alternately stacked with the plurality of first electrodes in a first direction, each second electrode including a second electrode current collector including a second electrode body and a second electrode tab, and a second electrode active material disposed on the second electrode current collector, and a solid electrolyte interposed between each first electrode and each second electrode. Each first electrode tab and each second electrode tab protrude from the first electrode body and the second electrode body, respectively, in a second direction crossing the first direction. A part, in which the first electrode tabs of the plurality of first electrodes make contact with each other, or a part, in which the second electrode tabs of the plurality of second electrodes make contact with each other, is spaced apart in the first direction from the first electrode or the second electrode, which is positioned at opposite ends, which are disposed in the first direction, of the plurality of first electrodes and the plurality of second electrodes. The first electrode tabs of the plurality of first electrodes may make contact with each other at one side of the first electrode body and the second electrode body in the second direction, and the second electrode tabs of the plurality of second electrodes may make contact with an opposite side of the first electrode body and the second electrode body in the second direction. The first electrode active material may have an area greater than an area of the second electrode active material. According to an aspect of the present disclosure, the all-solid-state battery may further include an edge member disposed along a circumference of the second electrode a