Electrode for secondary battery with improved safety, manufacturing method thereof, and secondary battery including same electrode

A secondary battery and electrode technology, applied in the direction of electrode manufacturing, battery electrodes, non-aqueous electrolyte storage battery electrodes, etc., can solve problems such as undisclosed structures or methods, prevent or reduce short circuits, improve safety, and reduce contact area small effect

Active Publication Date: 2019-10-29
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the invention does not specifically disclose the configuration or method for achieving a positive electrode with such elongation

Method used

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  • Electrode for secondary battery with improved safety, manufacturing method thereof, and secondary battery including same electrode
  • Electrode for secondary battery with improved safety, manufacturing method thereof, and secondary battery including same electrode
  • Electrode for secondary battery with improved safety, manufacturing method thereof, and secondary battery including same electrode

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0049] Preparation example 1 (positive electrode 1)

[0050] An aluminum foil having a thickness of 12 μm and an elongation of 2.5% was prepared as a positive electrode current collector.

[0051] In addition, LiNi as a positive electrode active material 0.6 Mn 0.2 Co 0.2 O 2 (Average particle size: 14μm), PVDF as a binder and Denka black as a conductive material are dissolved in a solvent N-methylpyrrolidone (NMP) in a composition ratio of 93:4:3 to prepare a positive electrode active Material layer of positive electrode slurry.

[0052] The positive electrode slurry was coated on both sides of the aluminum foil, dried and rolled to produce a positive electrode.

[0053] Used as figure 2 The roll press shown presses the positive electrode to form pores. At this time, the holes have a circular cross section with a diameter of 500 μm, and the arrangement pattern of the holes is figure 1 (a) The square pattern shown, and the hole interval Ls in the length direction of the side is 1 m...

preparation example 2

[0055] Preparation Example 2 (Positive 2)

[0056] A positive electrode was prepared in the same manner as in Example 1, except that the hole interval (Ls) was 5 mm.

preparation example 3

[0057] Preparation example 3 (positive electrode 3)

[0058] A positive electrode was prepared in the same manner as in Example 1, except that the hole interval (Ls) was 10 mm.

[0059] Preparation example 3 (positive electrode 4)

[0060] A positive electrode was prepared in the same manner as in Example 1, except that no holes were formed.

[0061]

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Abstract

The present invention relates to an electrode for a secondary battery with improved safety, a manufacturing method thereof, and a secondary battery including the electrode. The electrode for a secondary battery according to the present invention is characterized by having a plurality of holes formed to penetrate a current collector and an electrode active material layer in the thickness direction.Such an electrode can prevent or minimize the occurrence of ignition or explosion of the battery even when a needle-shaped body such as a nail infiltrates or penetrates into a battery, thereby improving the safety of the battery.

Description

Technical field [0001] This application claims priority based on Korean Patent Application No. 10-2017-0146387 filed on November 6, 2017 and Korean Patent Application No. 10-2018-0134596 filed on November 5, 2018, and combines these Korean patents The content of the application is incorporated herein as a part of this specification. [0002] The present invention relates to an electrode for a secondary battery with improved safety, a method of manufacturing the electrode, and a secondary battery containing the electrode, and more particularly to preventing or minimizing fire or fire when a sharp object (such as a nail) penetrates into the battery An electrode for a secondary battery with improved safety due to the occurrence of an explosion, a method of manufacturing the electrode, and a secondary battery containing the electrode. Background technique [0003] In recent years, with the rapid increase in demand for portable electronic products such as notebook computers, video came...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M4/74H01M4/139H01M4/04H01M10/052
CPCH01M4/13H01M4/139H01M10/052H01M4/742H01M4/0435H01M2004/021H01M2004/028Y02E60/50H01M4/0404H01M4/66H01M4/70H01M4/8828H01M50/342
Inventor 金惠彬李赫武吴松泽
Owner LG ENERGY SOLUTION LTD
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