POSITIVE ELECTRODE FOR SECONDARY BATTERY, METHOD FOR MANUFACTURING SAME AND LITHIUM SECONDARY BATTERY COMPRISING SAME

Title:

POSITIVE ELECTRODE FOR SECONDARY BATTERY, METHOD FOR MANUFACTURING SAME AND LITHIUM SECONDARY BATTERY COMPRISING SAME

Document Type and Number:

WIPO Patent Application WO/2018/097594

Kind Code:

A1

Abstract:

The present invention relates to a method for manufacturing a positive electrode for a secondary battery, the method comprising the steps of: spreading a first positive electrode slurry comprising a first positive electrode active material onto a positive electrode current collector; forming a first positive electrode mixture layer by primarily rolling the first positive electrode slurry that has been spread; spreading a second positive electrode slurry comprising a second positive electrode active material onto the first positive electrode mixture layer that has been formed; and forming a second positive electrode mixture layer laminated on the first positive electrode mixture layer by secondarily rolling the second positive electrode slurry that has been spread. A positive electrode for a secondary battery manufactured as such allows for greatly reducing the elongation of the lower-layer part of an electrode adjacent to the positive electrode current collector, thereby enabling puncture resistance to increase when a metal body such as a nail penetrates the electrode from the outside. Accordingly, a positive electrode for a secondary battery and a secondary battery comprising same may be provided, the positive electrode having improved stability by which a battery ignition or explosion due to an overcurrent may be prevented by means of overcurrent inhibition.

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Inventors:

KIM HYE BIN (KR)
YOON JONG KEON (KR)
OH SONG TAEK (KR)
CHOI JUNG SEOK (KR)

Application Number:

PCT/KR2017/013342

Publication Date:

May 31, 2018

Filing Date:

November 22, 2017

Export Citation:

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Assignee:

LG CHEMICAL LTD (KR)

International Classes:

H01M4/1391; H01M4/04; H01M4/131; H01M4/505; H01M4/525; H01M10/0525

Foreign References:

KR20160050283A	2016-05-11
KR20150029054A	2015-03-18
KR20160111673A	2016-09-27
KR20160050255A	2016-05-11
KR101236069B1	2013-02-22

Other References: