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Positive electrode current collector having conductive anti-corrosion layer formed on tab, positive electrode including same, and lithium secondary battery

A technology for lithium secondary batteries and current collectors, which can be used in electrode carriers/current collectors, secondary batteries, lithium storage batteries, etc., and can solve serious problems

Pending Publication Date: 2022-05-13
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Therefore, this Al corrosion becomes increasingly severe in the part of the Al foil directly exposed to the lithium non-aqueous electrolyte

Method used

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  • Positive electrode current collector having conductive anti-corrosion layer formed on tab, positive electrode including same, and lithium secondary battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0088] (Primer layer precursor solution)

[0089] 10 g of CNT (carbon nanotube) as a conductive material was put into 200 g of NMP solvent, then dispersed by applying H-NBR dispersant, and 5 g of PVdF as a binder were mixed to prepare a primer layer precursor solution.

preparation example 2

[0090] (conductive polymer layer precursor solution)

[0091] 10 g of polypyrrole as a conductive polymer was mixed with 100 g of a solvent dimethylformamide (DMF), and the mixture was stirred (40° C.) with a magnetic bar for 48 hours to prepare a conductive polymer layer precursor solution.

preparation example 3

[0092] (conductive epoxy resin layer precursor solution)

[0093] 8331S (two-part conductive epoxy adhesive including silver) available from MG Chemicals was used.

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Abstract

The present disclosure relates to a positive electrode current collector for a lithium secondary battery, the positive electrode current collector comprising a tab extending from a positive electrode current collector substrate, in which an anti-corrosion layer made of one selected from the group consisting of a primer layer, a conductive polymer layer, and a conductive epoxy resin layer is formed over the entire surface of the tab; a positive electrode including the same; and a lithium secondary battery.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims Korean Patent Application No. 10-2020-0034072 filed with the Korean Intellectual Property Office on March 19, 2020 and Korean Patent Application No. 10-2021- filed with the Korean Intellectual Property Office on January 8, 2021 No. 0002734, the disclosure of which is incorporated herein by reference in its entirety. [0003] The present disclosure relates to a positive electrode current collector having a conductive anticorrosion layer formed on a tab, a positive electrode including the same, and a lithium secondary battery. Background technique [0004] Due to the rapid increase in the use of fossil fuels, the need to use alternative energy or clean energy is increasing, and as part of this, the field that is being most actively researched is the field of electricity generation and electricity storage using electrochemistry. [0005] Currently, a secondary battery is a repres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/13H01M50/571H01M50/534H01M10/052
CPCH01M4/667H01M4/13H01M50/571H01M50/534H01M10/052H01M2004/028H01M4/663H01M4/661H01M4/668H01M10/0525H01M10/0568H01M10/0565H01M2300/0025Y02E60/10H01M4/623H01M4/628H01M2004/021H01M2300/0037
Inventor 尹泫雄黄淳煜河会珍
Owner LG ENERGY SOLUTION LTD