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Electrolytic copper foil, electrode including same, secondary battery and manufacturing method thereof

A technology of electrolytic copper foil and secondary battery, which is applied in the field of electrolytic copper foil and can solve problems such as wrinkling

Active Publication Date: 2021-09-21
SK NEXILIS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of an electrolytic copper foil having a thickness of 8 μm or less, which is used in an increased proportion to increase the secondary battery capacity, even if its weight deviation is controlled to be very low, wrinkle defects still occur

Method used

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  • Electrolytic copper foil, electrode including same, secondary battery and manufacturing method thereof
  • Electrolytic copper foil, electrode including same, secondary battery and manufacturing method thereof
  • Electrolytic copper foil, electrode including same, secondary battery and manufacturing method thereof

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Embodiment Construction

[0036] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0037] Various modifications and changes can be made to the present invention, which are easily conceived by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, the present invention includes all modifications and changes falling within the scope of the present invention as defined by the scope of the patent application and its equivalents.

[0038] A lithium secondary battery includes a cathode, an anode, an electrolyte that provides an environment in which lithium ions can move between the cathode and the anode, and electrically insulates the cathode from the anode to prevent electrons generated at one electrode from moving through the interior of the secondary battery to the A separator that is ineffectively consumed by another electrode.

[0039] figure 1 is a cross-sectional view of a secondary batte...

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PUM

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Abstract

Provided are an electrolytic copper foil substantially free from wrinkle defects, an electrode including the same, a secondary battery including the same, and a method of manufacturing the same. The electrolytic copper foil of the present invention has a first surface and a second surface opposite to the first surface, the first surface and the second surface each have a profile maximum ratio (PMR) of 4.8 to 16.1, and the electrolytic copper foil has a PMR of 0.49 to 1.28. (220) surface texture coefficient [TC (220)], 35kgf / mm 2 up to 58kgf / mm 2 yield strength, and a weight deviation of 3% or less.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 2017-0005857 filed on January 13, 2017, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates to an electrolytic copper foil substantially free from wrinkle defects, an electrode comprising the same, a secondary battery comprising the same, and a method of manufacturing the same. Background technique [0004] Electrolytic copper foil is being used in the manufacture of various products such as negative electrodes for secondary batteries and flexible printed circuit boards (FPCB). [0005] When the production conditions cannot be precisely controlled during the electrolytic copper foil manufacturing process, typical wrinkling defects that occur when manufacturing thin films cannot be prevented. [0006] Electrolytic copper foils having wrinkle defects lead to decr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/66H01M4/13C25D1/04C25D3/38
CPCH01M4/13H01M4/661C25D1/04C25D3/38Y02E60/10H01M4/38H01M4/583
Inventor 金昇玟金善花
Owner SK NEXILIS CO LTD