公开(公告)号：US20230318032A1

公开(公告)日：2023-10-05

申请号：US18111640

申请日：2023-02-20

Applicant: POSTECH Research and Business Development Foundation ,  GEV Co.,Ltd.

Inventor： Soojin PARK ,  Hye Bin SON ,  Seoha NAM ,  TaeSung HA ,  YoungHwan LEE ,  Ji Hyun PARK

IPC: H01M10/0565 ,  H01M50/46

CPC classification number: H01M10/0565 ,  H01M50/46 ,  H01M2300/0082 ,  H01M2300/0085

Abstract: Provided is a gel-type electrolyte composition for a secondary battery and a secondary battery including the same, wherein the gel-type electrolyte composition includes a lithium salt, an organic solvent, a C1 to C5 alkoxy silane compound, and a multi-functional symmetrical compound having a (meth)acrylate group.

公开(公告)号：US20230331936A1

公开(公告)日：2023-10-19

申请号：US18134107

申请日：2023-04-13

Applicant: GEV Co., Ltd. ,  BIOCOS INC.

Inventor： Tae-Sung HA ,  Pyeong-Hwan JUNG ,  Young-Ah KIM ,  Yeon-Hee KIM ,  Ji-Hyun PARK ,  Yu-Ji KANG

IPC: C08J3/075 ,  C08J3/24 ,  C08J3/28

CPC classification number: C08J3/075 ,  C08J3/246 ,  C08J3/28 ,  C08J2305/00 ,  C08J2405/00

Abstract: Disclosed is a hydrogel preparation method using crosslinking structure control by electron beam irradiation and a hydrogel prepared by the same, and the hydrogel preparation method includes: (A) mixing two or more natural polysaccharides and a solvent at room temperature to prepare a preliminary hydrogel composition; (B) heating the preliminary hydrogel composition to a predetermined temperature or higher to cause the preliminary hydrogel composition to be loosened linearly with respect to a chain-coil structure of the natural polysaccharides, resulting in uniform mixing; (C) lowering the temperature of the preliminary hydrogel composition to room temperature to gel the preliminary hydrogel composition into a hydrogel, and allowing the two or more natural polysaccharides to form a mesh structure by chain entanglement to form an Interpenetrating Polymer Network (IPN) structure; and (D) selectively irradiating the hydrogel with a high-energy electron beam to control a crosslinking structure by using chain scission reaction in the IPN structure of the hydrogel. According to the present invention, it is possible to prepare a hydrogel composed of only two or more kinds of natural polysaccharides, and increase functionality, such as moisturizing effect, while maintaining sufficient physical strength by controlling the crosslinking structure by using a chain scission reaction through high-energy electron beam irradiation, it is possible to use excellent functionality, such as biocompatibility and biodegradability, and in particular, it is possible to adjust a mesh size to provide a natural polysaccharide hydrogel which enables the moisture or active substance entrapped in the natural polysaccharides to escape to the outside and be well delivered to the desired area.