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KR-20260067266-A - BATTERY INCLUDING SEPARATOR AND ELECTRONIC DEVICE INCLUDING THE SAME

KR20260067266AKR 20260067266 AKR20260067266 AKR 20260067266AKR-20260067266-A

Abstract

A battery electrode, an apparatus for manufacturing the same, and a method for manufacturing the same are disclosed. A battery according to one embodiment of the present invention comprises an electrode, wherein the electrode may include a current collector having at least one surface having a defined length and width, an electrode active material layer formed by coating on the at least one surface of the current collector, and an insulating layer disposed to be in contact at least partially with the side of the electrode active material layer with respect to the length direction of the current collector. The side of the electrode active material layer may be formed to be perpendicular to the surface of the current collector.

Inventors

  • 이연일
  • 김선진

Assignees

  • 삼성전자주식회사

Dates

Publication Date
20260512
Application Date
20241223
Priority Date
20241105

Claims (20)

  1. In an electronic device including a battery, the battery is, anode; A cathode facing the anode; and It includes a separator (501) located between the anode and the cathode and in close contact with the anode and the cathode, and The above separator (501) is, porous polymer layer (510); and It includes a ceramic layer (520) disposed on the porous polymer layer (510), and The above ceramic layer (520) is an electronic device having a hole (523) formed on its surface that is shallower than the thickness of the ceramic layer (520).
  2. In Article 1, An electronic device in which the diameter of the hole (523) is 1 to 100 micrometers.
  3. In Article 1, A plurality of holes (523) are formed in the ceramic layer (520), and An electronic device in which the spacing between the plurality of holes (523) is 10 to 1000 micrometers.
  4. In Article 1, An electronic device in which the depth of the hole (523) is 0.1 to 2 micrometers.
  5. In Paragraph 3, An electronic device in which the diameter of the hole (523) is 25% or less of the spacing between the holes (523).
  6. In Article 1, An electronic device in which the depth of the above hole (523) is 75% or less of the thickness of the above ceramic layer (520).
  7. In Article 1, A plurality of holes (523) are formed in the ceramic layer (520), and The above plurality of holes (523) are electronic devices in which at least some of them are connected to each other.
  8. In Article 7, An electronic device in which the ratio of the area of the region where the hole is not formed on the surface of the ceramic layer (520) is 80% or more.
  9. In Article 1, The portions on the surface of the ceramic layer (520) where the holes are not formed are electronic devices connected to each other.
  10. In Article 1, The above hole (523) is an electronic device formed by an etching operation that irradiates a laser onto the surface of the ceramic layer (520).
  11. In Article 1, The above hole (523) is an electronic device formed by a pressing operation in which a roller (601) having a protrusion (610) having a shape corresponding to the hole (523) is pressed against the surface of the ceramic layer (520).
  12. Regarding batteries, anode; A cathode facing the anode; and It includes a separator (501) located between the anode and the cathode and in close contact with the anode and the cathode, and The above separator (501) is, porous polymer layer (510); and It includes a ceramic layer (520) disposed on the porous polymer layer (510), and The above ceramic layer (520) is a battery having a hole (523) formed on its surface that is shallower than the thickness of the ceramic layer (520).
  13. In Article 12, A battery in which the diameter of the hole (523) is 1 to 100 micrometers.
  14. In Article 12, A plurality of holes (523) are formed in the ceramic layer (520), and A battery in which the spacing between the plurality of holes (523) is 10 to 1000 micrometers.
  15. In Article 12, A battery in which the depth of the hole (523) is 0.1 to 2 micrometers.
  16. In Article 14, An electronic device in which the diameter of the hole (523) is 25% or less of the spacing between the holes (523).
  17. In Article 12, A battery in which the depth of the above hole (523) is 75% or less of the thickness of the above ceramic layer (520).
  18. In Article 12, A plurality of holes (523) are formed in the ceramic layer (520), and The above plurality of holes (523) are electronic devices in which at least some of them are connected to each other.
  19. In Article 18, An electronic device in which the ratio of the area of the region where the hole is not formed on the surface of the ceramic layer (520) is 80% or more.
  20. In Article 12, The portions on the surface of the ceramic layer (520) where the holes are not formed are connected to each other.

Description

Battery including a separator and electronic device including the same One embodiment disclosed in this document relates to a battery, and more specifically, to a battery separator. Due to recent advancements in electronic devices, secondary batteries, which are capable of storing and outputting electrical energy, are widely used. Lithium-ion batteries are lightweight, have high energy density, and exhibit good charge and discharge characteristics; as such, they are widely used not only in portable electronic devices but also in fields such as electric vehicles and Energy Storage Systems (ESS). The battery may include electrodes (positive and negative electrodes), an electrolyte, and a separator. To prevent the occurrence of a short circuit and fire caused by direct contact between the positive and negative electrodes, a separator may be placed between the positive and negative electrodes. The separator may include a porous polymer material (e.g., stretched polypropylene and/or stretched polyethylene) to allow the passage of ions. The separator may include a ceramic coating to reduce penetration of the separator (e.g., penetration caused by dendrite growth from the cathode). The ceramic coating can be formed by mixing ceramic particles and a binder and applying them onto the separator substrate. Since the separator and the electrode are bonded together by compression during battery manufacturing, the electrolyte may be absorbed through the micropores between the ceramic particles on the side of the ceramic coating layer during the electrolyte injection process. Microgrooves may be formed in the ceramic coating layer to improve the wetting speed and absorption rate of the electrolyte. However, the ceramic coating layer with microgrooves reduces the contact area between the electrodes, which may decrease the adhesion between the electrode and the separator. Additionally, a significant amount of the electrolyte absorbed within the microgrooves leaks out during the suction process after electrolyte injection, resulting in minimal improvement in battery life. According to the embodiments disclosed in this document, a battery comprising a separator having improved adhesion to the electrode and improved battery life, and an electronic device comprising the same may be provided. The technical problems to be solved in this document are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which this invention belongs from the description below. An electronic device according to various embodiments of the present disclosure may be an electronic device comprising a battery. The battery may include a positive electrode, a negative electrode facing the positive electrode, and a separator located between the positive electrode and the negative electrode and in close contact with the positive electrode and the negative electrode. The separator may include a porous polymer layer and a ceramic layer disposed on the porous polymer layer. A hole may be formed on the surface of the ceramic layer, the depth of which is shallower than the thickness of the ceramic layer. A battery according to various embodiments of the present disclosure may include a positive electrode, a negative electrode facing the positive electrode, and a separator located between the positive electrode and the negative electrode and in close contact with the positive electrode and the negative electrode. The separator may include a porous polymer layer and a ceramic layer disposed on the porous polymer layer. A hole may be formed on the surface of the ceramic layer, the depth of which is shallower than the thickness of the ceramic layer. According to embodiments of the present invention, holes formed on the surface of the ceramic coating layer of the separator improve the electrolyte absorption amount, and since the regions of the ceramic coating layer surface where holes are not formed are connected to each other, the adhesion between the separator and the electrode can be improved. Accordingly, a battery with improved lifespan and structural stability and an electronic device including the same can be provided. In relation to the description of the drawings, the same or similar reference numerals may be used for identical or similar components. FIG. 1a is a block diagram of an electronic device in a network environment according to one embodiment. FIG. 1b is a block diagram of a power circuit and a battery of an electronic device for receiving power outside the electronic device and/or transmitting power outside the electronic device, according to one embodiment. FIGS. 2a to 2c are perspective views schematically illustrating the internal structure of a battery according to one embodiment. FIG. 3a is an exploded perspective view showing the electrode and separator of a battery according to various embodiments of the present invention. FIG. 3b is an enlarged cross-sectio