Strip-shaped electrode used for cylindrical jelly roll and lithium secondary battery comprising same

A lithium secondary battery, cylindrical technology, applied in the field of lithium secondary batteries, can solve problems such as electrode coating cracking, and achieve the effect of excellent adhesion and excellent conductivity
CN110462885AActive Publication Date: 2019-11-15LG ENERGY SOLUTION LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
LG ENERGY SOLUTION LTD
Publication Date
2019-11-15

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Abstract

The present invention relates to a strip-shaped electrode used for a cylindrical jelly roll in which a strip-shaped electrode assembly is wound in a cylindrical shape such that a hollow space is formed at a core part thereof, and a lithium secondary battery comprising the same, the strip-shaped electrode comprising: a strip-shaped electrode current collector; a first electrode active material layer formed on at least one surface of the strip-shaped electrode current collector; and a second electrode active material layer formed on the first electrode active material layer, wherein the second electrode active material layer is formed to be shorter than the first electrode active material layer such that the first electrode active material layer has one lengthwise side surface, a part of which is exposed to the outside.
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Description

technical field

[0001] This application claims priority from Korean Patent Application No. 10-2017-0148955 filed in Korea on Nov. 9, 2017, the disclosure of which is incorporated herein by reference.

[0002] The present disclosure relates to a strip electrode for a cylindrical jelly roll and a lithium secondary battery including the same. Background technique

[0003] With the technological development and increase in demand for mobile devices, there is an increasing demand for secondary batteries as energy sources. Among these secondary batteries, many studies have been conducted on lithium secondary batteries having high energy density and discharge voltage, and such lithium secondary batteries have been commercialized and widely used.

[0004] According to the shape of the battery case, the secondary battery is divided into a cylindrical battery and a prismatic battery in which the electrode assembly is housed in a cylindrical or prismatic metal can, respectively, and a...

Claims

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