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Electrode for secondary battery and method for manufacturing same

A secondary battery and electrode technology, applied in secondary battery manufacturing, electrode manufacturing, battery electrodes, etc., can solve problems such as easy breakage, electrode disconnection process, defects, etc., and achieve the effect of reducing breakage

Pending Publication Date: 2021-11-30
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the wrinkling of the uncoated portion 40 generated during rolling, process defects such as electrode disconnection may occur in subsequent processes
In particular, when high tensile residual stress remains at the interface between the coated portion 30P and the uncoated portion 40, the electrode may continue to receive weak stress due to shrinkage and expansion, and may become easily broken.

Method used

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  • Electrode for secondary battery and method for manufacturing same
  • Electrode for secondary battery and method for manufacturing same
  • Electrode for secondary battery and method for manufacturing same

Examples

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Embodiment Construction

[0033] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement them. The present disclosure may be modified in various ways, and is not limited to the embodiments set forth herein.

[0034] Parts irrelevant to the description will be omitted to clearly describe the present disclosure, and like reference numerals denote like elements throughout the application.

[0035] Also, in the drawings, the size and thickness of each element are arbitrarily shown for convenience of description, and the present disclosure is not necessarily limited to those shown in the drawings. In the drawings, the thicknesses of layers, regions, etc., are exaggerated for clarity. In the drawings, the thicknesses of some layers and regions are exaggeratedly shown for convenience of description.

[0036] In addition, it will be understood that when an element such as a layer, ...

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Abstract

An electrode for a secondary battery according to an embodiment of the present invention comprises: an electrode current collector including a coating portion and a non-coating portion; and an active material layer located on the coating portion of the electrode current collector, wherein at least one perforation portion is formed at an interface between the coating portion and the non-coating portion.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2019-0170940 filed on December 19, 2019 at the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference. [0003] The present disclosure relates to an electrode of a secondary battery and a method of manufacturing an electrode of a secondary battery, and more particularly, to an electrode of a secondary battery for controlling tensile residual stress and a method of manufacturing an electrode of a secondary battery . Background technique [0004] A secondary battery may be formed by inserting an electrode assembly composed of a positive electrode plate, a negative electrode plate, and a separator into a case, and then sealing the case. A positive electrode plate or a negative electrode plate (hereinafter, referred to as “electrode plate”) may be formed by coating an active material s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/02H01M4/04
CPCH01M4/02H01M4/04H01M4/0404H01M2004/021H01M4/13H01M4/139Y02E60/10H01M10/0431H01M10/4235H01M10/052H01M10/0587H01M4/742H01M4/0435H01M4/0471Y02P70/50H01M50/46
Inventor 文载元彭纪熏韩亨锡李相勉
Owner LG ENERGY SOLUTION LTD
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