Title:
改善された電極接着力及び抵抗特性を有するリチウム二次電池用分離膜及び該分離膜を含むリチウム二次電池
Document Type and Number:
Japanese Patent JP7359937
Kind Code:
B2
Abstract:
Disclosed is a separator for a lithium secondary battery which includes: a porous polymer substrate; and a porous coating layer positioned on at least one surface of the porous polymer substrate and containing inorganic particles and a binder polymer, wherein the binder polymer includes a PVdF-based binder polymer, and the PVdF-based binder polymer has a first peak at a 2θ of 18.2±0.2° and a second peak at a 2θ of 19.8±0.2°, as analyzed by X-ray diffractometry (XRD), and the ratio of the area of the second peak to the area of the first peak (area of the second peak/area of the first peak) is equal to or more than 1.25 and less than 2.75. The separator for a lithium secondary battery includes fine and uniform pores formed on the surface thereof to provide an increased adhesive surface area to an electrode, resulting in improvement of adhesion to an electrode.
Inventors:
Ju-sung Lee
Bong Tae Kim
Kill-Ahn Joon
Bong Tae Kim
Kill-Ahn Joon
Application Number:
JP2022504277A
Publication Date:
October 11, 2023
Filing Date:
August 07, 2020
Export Citation:
Assignee:
LG HAUSYS,LTD.
International Classes:
H01M50/451; H01M50/417; H01M50/426; H01M50/434; H01M50/443; H01M50/446; H01M50/46
Domestic Patent References:
| JP2016033913A |
Foreign References:
| KR101430975B1 |
Attorney, Agent or Firm:
Shinya Mihiro
Watanabe Takashi
Watanabe Takashi
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