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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11211671 B1

PDFFull Text
Date of Patent:
Dec. 28, 2021

Filed:

Nov. 20, 2018

Porous film, separator including the same, electrochemical device including separator, and method of preparing porous film

Applicant:

Samsung Electronics Co., Ltd., Suwon-si, KR;

Inventors:

Hyunchul Lee, Hwaseong-si, KR;

Junhwan Ku, Seongnam-si, KR;

Hyeokjo Gwon, Hwaseong-si, KR;

Nagjong Kim, Suwon-si, KR;

Chilhee Chung, Seoul, KR;

Sangmin Ji, Yongin-si, KR;

Jinkyu Kang, Hwaseong-si, KR;

Changduk Kang, Gwacheon-si, KR;

Ryounghee Kim, Uiwang-si, KR;

Minsang Kim, Anseong-si, KR;

Euncheol Do, Seoul, KR;

Kitae Park, Seoul, KR;

Sunghaeng Lee, Seoul, KR;

Assignee:

SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-do, KR;

Attorney:

Cantor Colburn LLP

Primary Examiner:

Hai Vo

Int. Cl.
CPC ...
H01M 50/44 (2021.01); C08J 5/22 (2006.01); H01M 10/052 (2010.01); D21H 11/18 (2006.01); D21H 21/22 (2006.01); B32B 21/02 (2006.01); B32B 21/10 (2006.01); B32B 5/18 (2006.01); B32B 5/32 (2006.01); H01M 50/429 (2021.01); H01M 50/449 (2021.01);
U.S. Cl.
CPC ...
H01M 50/44 (2021.01); B32B 5/18 (2013.01); B32B 5/32 (2013.01); B32B 21/02 (2013.01); B32B 21/10 (2013.01); C08J 5/2212 (2013.01); D21H 11/18 (2013.01); D21H 21/22 (2013.01); H01M 10/052 (2013.01); H01M 50/4295 (2021.01); H01M 50/449 (2021.01); B32B 2262/062 (2013.01); Y10T 428/249965 (2015.04); Y10T 428/249986 (2015.04);
Abstract

Provided herein are a porous film, a separator including the same, an electrochemical device including the separator, and a method of preparing the porous film. The porous film includes first cellulose nanofibers which is impregnated with a carbonate-based solvent-containing electrolyte solution and has a reaction heat of 150 J/g or less at a temperature ranging from about 30° C. to about 300° C., as measured by differential scanning calorimetry (DSC).

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