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KR-20260064960-A - ALL-SOLID RECHARGEABLE BATTERY

KR20260064960AKR 20260064960 AKR20260064960 AKR 20260064960AKR-20260064960-A

Abstract

An all-solid-state secondary battery according to an embodiment comprises a plurality of unit cells electrically connected to one another, wherein the unit cell comprises a substrate, at least one all-solid-state cell located on the substrate and comprising a positive electrode, a solid electrolyte layer, and a negative electrode, a cover covering the all-solid-state cell, a first penetrating conductive member penetrating the substrate and electrically connected to the positive electrode, and a second penetrating conductive member penetrating the cover and electrically connected to the negative electrode.

Inventors

  • 이정민

Assignees

  • 삼성에스디아이 주식회사

Dates

Publication Date
20260508
Application Date
20241030

Claims (11)

  1. Multiple unit cells electrically connected to each other Includes, The above unit cell is substrate, At least one all-solid-state cell positioned on the above substrate and comprising an anode, a solid electrolyte layer, and a cathode, A cover covering the above-mentioned all-solid-state cell, A first penetrating conductive member penetrating the substrate and electrically connected to the anode, and A second penetrating conductive member penetrating the cover and electrically connected to the cathode All-solid-state secondary battery including
  2. In paragraph 1, A solid-state secondary battery in which the first penetrating conductive member of one unit cell is electrically connected to the second penetrating conductive member of another unit cell adjacent to the one unit cell in the vertical direction.
  3. In paragraph 2, The above unit cell further comprises a first insulating layer surrounding a portion of the outer surface of the above all-solid-state cell, an all-solid-state secondary battery.
  4. In Paragraph 3, The above unit cell further comprises a second insulating layer surrounding the outer surface of the first insulating layer, an all-solid-state secondary battery.
  5. In Paragraph 4, A solid-state secondary battery, wherein the above unit cell is located between the substrate and the cover and further includes a molding member surrounding the outer surface of the second insulating layer.
  6. In Paragraph 1, A solid-state secondary battery in which the first penetrating conductive member of one unit cell is electrically connected to the first penetrating conductive member of another unit cell adjacent to the one unit cell through a connecting member.
  7. Multiple secondary battery assemblies that are stacked and electrically connected to each other Includes, The above secondary battery assembly panel substrate, A plurality of unit cells formed on the above panel substrate, and A conductive member formed on the panel substrate and electrically connecting the plurality of unit cells Includes, The above unit cell is At least one all-solid-state cell positioned on the above panel substrate and comprising an anode, a solid electrolyte layer, and a cathode, A cover covering the above-mentioned all-solid-state cell, A first penetrating conductive member penetrating the panel substrate and electrically connected to the anode, and A second penetrating conductive member penetrating the cover and electrically connected to the cathode All-solid-state secondary battery including
  8. In Paragraph 7, A solid-state secondary battery, wherein the first penetrating conductive member of one secondary battery assembly is electrically connected to the second penetrating conductive member of another secondary battery assembly adjacent to the one secondary battery assembly in the vertical direction.
  9. In paragraph 8, The above unit cell further comprises a first insulating layer surrounding a portion of the outer surface of the above all-solid-state cell, an all-solid-state secondary battery.
  10. In Paragraph 9, The above unit cell further comprises a second insulating layer surrounding the outer surface of the first insulating layer, an all-solid-state secondary battery.
  11. In Paragraph 12, The above unit cell is located between the panel substrate and the cover, and further includes a molding member surrounding the outer surface of the second insulating layer, an all-solid-state secondary battery.

Description

All-solid rechargeable battery The present disclosure relates to an all-solid-state secondary battery. With recent reports regarding the explosion risks associated with batteries using liquid electrolytes, the development of all-solid-state rechargeable batteries is underway. An all-solid-state rechargeable battery is a battery composed entirely of solid materials that utilizes a solid electrolyte. These batteries are safe as they eliminate the risk of explosions caused by electrolyte leakage. They also offer advantages such as ease of manufacturing thin-film batteries, high energy density, and the ability to achieve high capacity. Figure 1 is a cross-sectional view of an all-solid-state battery. Figure 2 is a cross-sectional view of an all-solid-state battery including a precipitation type cathode. FIG. 3 is a cross-sectional view of an all-solid-state secondary battery according to one embodiment. FIG. 4 is a cross-sectional view of an all-solid-state secondary battery according to another embodiment. FIG. 5 is a plan view of an all-solid-state secondary battery according to another embodiment. Figure 6 is a cross-sectional view taken along the line VI-VI' of Figure 5. Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. In the drawings, thicknesses have been enlarged to clearly represent various layers and regions, and the same reference numerals have been used for similar parts throughout the specification. When a part such as a layer, film, region, or plate is described as being "on" or "on" another part, this includes not only cases where it is "immediately on" another part, but also cases where there is another part in between. Conversely, when a part is described as being "immediately on" another part, it means that there is no other part in between. In addition, the term “layer” here includes not only shapes formed on the entire surface when viewed in a plan view, but also shapes formed on some surfaces. Here, “or” is not interpreted in an exclusive sense, and for example, “A or B” is interpreted to include A, B, A+B, etc. cathode for all-solid-state secondary batteries In one embodiment, a positive electrode for an all-solid-state secondary battery is provided, comprising a current collector and a positive active material layer located on the current collector, wherein the positive active material layer comprises at least one of a positive active material, a sulfide-based solid electrolyte, a binder, and a conductive material. However, the positive electrode for an all-solid-state secondary battery is not limited thereto, and may include more or fewer components than the components described above. In one embodiment, the positive electrode for the all-solid-state secondary battery is manufactured by applying a positive electrode composition comprising at least one of a positive electrode active material, a sulfide-based solid electrolyte, a binder, and a conductive material to a current collector, and then drying and rolling. positive electrode active material The above-mentioned positive active material may be applied without limitation as long as it is commonly used in all-solid-state secondary batteries. For example, the above-mentioned positive active material may be a compound capable of reversible intercalation and deintercalation of lithium, and may include a compound represented by any one of the following chemical formulas. Lia A 1- b Lia A 1 - b Li aE1-b Li aE2-b Li a Ni 1- bc Co b Lia Ni 1- bc Co b Lia Ni 1- bc Co b Li a Ni 1- bc Mn b Li a Ni 1 - bc Mn b Li a Ni 1 - bc Mn b Li a Ni b E c G d O 2 (0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.9, 0 ≤ c ≤ 0.5, 0.001 ≤ d ≤ 0.1); Li a Ni b Co c Mn d G e O 2 (0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.9, 0 ≤ c ≤ 0.5, 0 ≤ d ≤0.5, 0.001 ≤ e ≤ 0.1); Li a NiG b O 2 (0.90 ≤ a ≤ 1.8, 0.001 ≤ b ≤ 0.1); Li a CoG b O 2 (0.90 ≤ a ≤ 1.8, 0.001 ≤ b ≤ 0.1); Li a Mn 1-b G b O 2 (0.90 ≤ a ≤ 1.8, 0.001 ≤ b ≤ 0.1); Li a Mn 2 G b O 4 (0.90 ≤ a ≤ 1.8, 0.001 ≤ b ≤ 0.1); Li a Mn 1-g G g PO 4 (0.90 ≤ a ≤ 1.8, 0 ≤ g ≤ 0.5); QO 2 ; QS 2 ; LiQS 2 ; V 2 O 5 ; LiV 2 O 5 ; LiZO 2 ; LiNiVO 4 ; Li (3-f) J 2 (PO 4 ) 3 (0 ≤ f ≤ 2); Li (3-f) Fe 2 (PO 4 ) 3 (0 ≤ f ≤ 2); Li a FePO 4 (0.90 ≤ a ≤ 1.8). In the above chemical formulas, A is selected from the group consisting of Ni, Co, Mn, and combinations thereof; X is selected from the group consisting of Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, rare earth elements, and combinations thereof; D is selected from the group consisting of O, F, S, P, and combinations thereof; E is selected f