US 11,942,593 B2
Lithium battery
Hyeokjo Gwon, Hwaseong-si (KR); Jinkyu Kang, Hwaseong-si (KR); Kitae Park, Seoul (KR); Hyunchul Lee, Hwaseong-si (KR); Ryounghee Kim, Uiwang-si (KR); Euncheol Do, Seoul (KR); Soojin Park, Hwaseong-si (KR); and Sangmin Ji, Yongin-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Dec. 8, 2021, as Appl. No. 17/545,036.
Application 17/545,036 is a continuation of application No. 16/517,302, filed on Jul. 19, 2019, granted, now 11,245,130.
Claims priority of application No. 10-2018-0088152 (KR), filed on Jul. 27, 2018.
Prior Publication US 2022/0102750 A1, Mar. 31, 2022
Int. Cl. H01M 10/052 (2010.01); H01M 10/0567 (2010.01); H01M 50/403 (2021.01); H01M 50/417 (2021.01); H01M 50/429 (2021.01); H01M 50/44 (2021.01); H01M 50/449 (2021.01); H01M 50/457 (2021.01); H01M 50/46 (2021.01); H01M 50/48 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01); H01M 50/494 (2021.01)
CPC H01M 10/052 (2013.01) [H01M 10/0567 (2013.01); H01M 50/417 (2021.01); H01M 50/429 (2021.01); H01M 50/44 (2021.01); H01M 50/449 (2021.01); H01M 50/457 (2021.01); H01M 50/46 (2021.01); H01M 50/403 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01); H01M 50/494 (2021.01)] 30 Claims
 
1. A lithium battery comprising:
a cathode comprising a cathode active material;
an anode comprising an anode active material;
an electrolyte disposed between the cathode and the anode; and
a separator impregnated with the electrolyte,
wherein the separator comprises cellulose nanofibers, and
wherein a differential scanning calorimetry (DSC) thermogram of the separator impregnated with the electrolyte does not show an exothermic reaction peak as represented by a differential value (dH/dT) within a temperature range of about 150° C. to about 200° C.,
wherein the cellulose nanofibers comprise carboxyl group-containing microbial cellulose nanofibers,
wherein the carboxyl group of the carboxyl group-containing microbial cellulose nanofibers is bound to a carbon atom of a pyranose ring and is represented by Formula a or b below:
—R1—O—R2—COOM  <Formula a>
—O—R2—COOM,  <Formula b>
wherein R1 and R2 are each independently a substituted or unsubstituted C1-C10 alkylene group, and M is hydrogen or an alkali metal.