US 12,444,764 B2
Complex fiber, solid state electrolyte comprising same, and metal-air battery comprising same
Jung-Ho Lee, Ansan-si (KR); Sambhaji Shivaji Shinde, Ansan-si (KR); and Dong-Hyung Kim, Ansan-si (KR)
Assigned to FLEXOLYTE, Ansan-si (KR)
Appl. No. 17/418,304
Filed by FLEXOLYTE, Ansan-Si (KR)
PCT Filed Feb. 22, 2021, PCT No. PCT/KR2021/002214
§ 371(c)(1), (2) Date Jun. 25, 2021,
PCT Pub. No. WO2021/167431, PCT Pub. Date Aug. 26, 2021.
Claims priority of application No. 10-2020-0021252 (KR), filed on Feb. 20, 2020; application No. 10-2020-0021253 (KR), filed on Feb. 20, 2020; application No. 10-2020-0021894 (KR), filed on Feb. 21, 2020; application No. 10-2020-0164652 (KR), filed on Nov. 30, 2020; and application No. 10-2020-0164653 (KR), filed on Nov. 30, 2020.
Prior Publication US 2021/0408567 A1, Dec. 30, 2021
Int. Cl. H01M 8/1016 (2016.01); H01M 12/06 (2006.01); H01M 50/403 (2021.01); H01M 50/429 (2021.01)
CPC H01M 8/1016 (2013.01) [H01M 12/06 (2013.01); H01M 50/403 (2021.01); H01M 50/4295 (2021.01); H01M 2220/20 (2013.01); H01M 2300/0065 (2013.01)] 7 Claims
 
1. A method for preparing a solid state electrolyte, the method comprising:
preparing a quaternized chitosan derivative from chitosan chloride by (a) dissolving chitosan chloride in aqueous acetic acid, and (b) treating the dissolved chitosan chloride with glycidyltrimethylammonium chloride to form the quaternized chitosan derivative;
preparing a culture medium having the quaternized chitosan derivative;
culturing Acetobacter xylinum in the culture medium to produce quaternized chitosan bound to bacterial cellulose; and
oxidizing a surface of the quaternized chitosan bound to bacterial cellulose by using an oxidizing agent to form a solid state electrolyte, wherein the solid state electrolyte has a chitosan content that is more than 30 wt % and less than 70 wt %.