CN-122000642-A - All-solid battery and method for manufacturing all-solid battery

Abstract

The present disclosure provides an all-solid battery including a plurality of first electrodes, a plurality of second electrodes alternately stacked with the plurality of first electrodes in a first direction, and a solid electrolyte interposed between the first electrodes, wherein each of the first electrodes includes 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, the polarity of the second electrode is different from that of the first electrode, each of the second electrodes includes a second electrode current collector including a second electrode body and a second electrode active material disposed on the second electrode current collector, and the second electrode current collector includes a second electrode body and a second electrode tab.

Inventors

• ZHAO CHENGZHU
• JIN ZHUMIN
• Jin Yunxuan

Assignees

• 现代自动车株式会社
• 起亚株式会社

Dates

Publication Date

20260508

Application Date

20250915

Priority Date

20241105

Claims (14)

1. 1. An all-solid battery comprising: A plurality of first electrodes, each first electrode including a first electrode current collector and a first electrode active material disposed on the first electrode current collector, the first electrode current collector including a first electrode body and a first electrode tab; a plurality of second electrodes having a polarity different from that of the plurality of first electrodes and alternately laminated with the plurality of first electrodes in a first direction, each second electrode including a second electrode current collector and a second electrode active material disposed on the second electrode current collector, the second electrode current collector including a second electrode body and a second electrode tab, and A solid electrolyte disposed between the first electrode and the second electrode, The first electrode tab and the second electrode tab are formed to extend in the first direction to contact both ends of the first electrode or the second electrode located at one end of the first direction among the plurality of first electrodes and the plurality of second electrodes in the second direction crossing the first direction.
2. 2. The all-solid battery according to claim 1, Wherein the first electrode tab contacts 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 are in contact with each other at the other sides of the first electrode body and the second electrode body in the second direction.
3. 3. The all-solid battery according to claim 1, wherein an area of the first electrode active material is larger than an area of the second electrode active material.
4. 4. The all-solid battery according to claim 1, further comprising: and an edge member disposed along an outer circumference of the second electrode active material and in contact with the second electrode tab.
5. 5. The all-solid battery according to claim 1, Wherein the first electrode is an anode, and Wherein the second electrode is a cathode.
6. 6. A method for manufacturing an all-solid-state battery, the method comprising the steps of: Laminating at least one first electrode, at least one second electrode having a polarity different from that 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 in a first direction; Laminating the laminated at least one first electrode, at least one solid electrolyte, at least one second electrode on a jig plate, and packaging the resulting structure with an exterior material, and Pressurizing at least one first electrode, at least one solid electrolyte and at least one second electrode in the first direction, Wherein at least one first electrode includes a first electrode current collector including a first electrode body and a first electrode tab protruding from the first electrode body, Wherein the at least one second electrode includes a second electrode current collector including a second electrode body and a second electrode tab protruding from the second electrode body, and Wherein when at least one first electrode, at least one second electrode, and at least one solid electrolyte are laminated on the jig plate, the first electrode tab and the second electrode tab are formed to extend in the first direction to be in contact with both ends of the first electrode or the second electrode located at one end of the at least one first electrode and the at least one second electrode in the first direction in a second direction crossing the first direction.
7. 7. The method of claim 6, wherein the two ends of the jig plate in the second direction are disposed outwardly in the second direction relative to the two ends of the first electrode body in the second direction or aligned with positions corresponding to the two ends of the first electrode body in the second direction in the first direction.
8. 8. The method of claim 6, wherein the first and second electrode tabs are in contact with both ends of the jig plate in the second direction.
9. 9. The method of claim 6, wherein both ends of the jig plate in the second direction are disposed inward with respect to both ends of the first electrode body in the second direction or aligned with positions corresponding to both ends of the first electrode body in the second direction in the first direction.
10. 10. The method of claim 6, wherein encapsulating the at least one first electrode, the at least one solid electrolyte, and the at least one second electrode with the outer jacket material comprises: A protective film is further arranged between the jig plate and the first electrode or the second electrode positioned at one tail end in the first direction of the at least one first electrode and the at least one second electrode.
11. 11. The method of claim 6, wherein the jig plate comprises: jig plate main body, and A jig plate cover provided on both sides of the jig plate body in the second direction, and Wherein, the tool board cover includes elastic component.
12. 12. The method of claim 6, further comprising the step of: After pressurizing the encapsulated at least one first electrode, at least one solid electrolyte and at least one second electrode, the encapsulated exterior material is removed and a plurality of first electrodes and a plurality of secondary electrodes are further laminated.
13. 13. The method of claim 12, further comprising the step of: after the plurality of first electrodes, the plurality of solid electrolytes, and the plurality of second electrodes are stacked, the first electrode tabs of the plurality of first electrodes are brought into contact with each other and the first electrode tabs are bonded to the first leads, and the second electrode tabs of the plurality of second electrodes are brought into contact with each other and the second electrode tabs are bonded to the second leads.
14. 14. The method of claim 13, further comprising the step of: and packaging the laminated first electrodes, solid electrolytes and second electrodes with a rear packaging material.

Description

All-solid battery and method for manufacturing all-solid battery Technical Field The present disclosure relates to all-solid-state batteries and methods for manufacturing all-solid-state batteries. Background Unlike primary batteries, which cannot be charged after discharge, secondary batteries can be repeatedly charged, and are suitable for various fields such as smart phones, automobiles, unmanned aerial vehicles, robots and the like, and the importance of the secondary batteries is increasing. Since the secondary battery according to the related art employs a liquid electrolyte, when the secondary battery swells due to a temperature change or leaks due to an external impact, explosion or fire is easily caused, whereby stability is lowered. In order to solve such problems, research into all-solid-state batteries is actively being conducted. Since the all-solid battery includes a solid electrolyte between a cathode active material and an anode active material, the all-solid battery has higher stability in terms of structure, so that a separator is not required. Accordingly, the all-solid-state battery can achieve miniaturization of the battery, and can have a higher energy density. However, the electrode active material expands and contracts during charge/discharge of the all-solid battery. Accordingly, the interface between the electrode active material and the solid electrolyte is peeled off, thereby degrading the performance of the all-solid battery. Therefore, in order to prevent interfacial delamination between the electrode active material and the solid electrolyte, the all-solid-state battery may be subjected to an isostatic treatment. In this case, a structure capable of preventing the electrode tab (tab) of the electrode current collector from being damaged during the isostatic pressing is required. Disclosure of Invention The present disclosure is directed to solving the above-described problems occurring in the prior art, while maintaining the advantages achieved by the prior art. An aspect of the present disclosure provides an all-solid battery configured to prevent an electrode tab from being damaged during an isostatic pressing process, and a method for manufacturing the all-solid battery. The technical problems to be solved by the present disclosure are not limited to the above-described problems, and any other technical problems not mentioned herein will be clearly understood by those skilled in the art to which the present disclosure pertains from the following description. According to one aspect of the present disclosure, an all-solid battery includes a plurality of first electrodes, each of the first electrodes 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 that of the plurality of first electrodes and alternately laminated with the plurality of first electrodes in a first direction, each of the second electrodes including a second electrode current collector and a second electrode active material disposed on the second electrode current collector, the second electrode current collector including a second electrode body and a second electrode tab, and a solid electrolyte interposed between the first electrode and the second electrode. The first electrode tab and the second electrode tab are formed to extend in the first direction to be in contact with both ends of the first electrode or the second electrode located at one end of the first direction among the plurality of first electrodes and the plurality of second electrodes in the second direction. The first electrode tab may contact each other at one side of the first electrode body and the second electrode body in the second direction, and the second electrode tab may contact each other at the other side of the first electrode body and the second electrode body in the second direction. The area of the first electrode active material is larger than the area of the second electrode active material. According to an aspect of the present disclosure, the all-solid battery may further include an edge member disposed along an outer circumference of the second electrode active material and in contact with the second electrode tab. The first electrode may be provided as an anode and the second electrode may be provided as a cathode. In one aspect of the present disclosure, a method for manufacturing an all-solid battery may include laminating at least one first electrode, at least one second electrode having a polarity different from that 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 in a first direction, laminating the laminated at least one first electrode, at least one solid electrolyte, and at least one second el