公开(公告)号：US20220393255A1

公开(公告)日：2022-12-08

申请号：US17639576

申请日：2020-01-11

Applicant: SHANDONG UNIVERSITY OF TECHNOLOGY

Inventor： Zhongfang LI ,  Peng SUN ,  Weihui CUI ,  Chuangang WANG ,  Hui GUO ,  Yan WANG

IPC: H01M10/42 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/0567 ,  C08G79/025

Abstract: A lithium salt easily soluble in an organic solvent and having a flame-retardant function and a lithium-ion battery flame-retardant electrolyte thereof are provided. The lithium salt is poly(lithium phosphate) phosphazene partially substituted by alkyl aromatic oxy groups, and has a structural general formula: [(R—Ar—O)x(P═N)n(Li2O3P)2n-x]. The novel flame-retardant electrolyte is compounded from the lithium salt and a phosphate intermediate thereof [(R—Ar—O)x(P═N)n(R′2O3P)2n-x] according to a mass ratio of 10:1-1:1. The electrolyte is easily soluble in an organic solvent. A liquid electrolyte is prepared according to an amount of 8%-45% to obtain the novel flame-retardant liquid electrolyte. The liquid electrolyte has good lithium ion conductivity and good flame-retardant properties, and is used in lithium-ion batteries, lithium-sulfur batteries, lithium carbon fluoride batteries or lithium-oxygen batteries.

公开(公告)号：US20220275279A1

公开(公告)日：2022-09-01

申请号：US17631502

申请日：2020-12-16

Applicant: SHANDONG UNIVERSITY OF TECHNOLOGY

Inventor： Zhongfang LI ,  Peng SUN ,  Hui GUO ,  Likai WANG ,  Xueliang NIU

IPC: C09K21/14 ,  C09K21/04 ,  C08L75/08 ,  C08J9/00 ,  C08J9/12 ,  C08J9/10 ,  C08J9/08

Abstract: The polyurethane flame retardant is prepared by compounding poly(diphosphophosphazene) (PDPP) and derivatives thereof, poly(diphosphate phosphazene) (MPDPP) (where M=Mg2+, Ca2+, transition metal ions, rare earth ions and the like) and poly(diphosphonic phosphazene). Since a phosphate group in the PDPP and an unreacted phosphate group in the MPDPP in the compound and an unreacted hydroxyl in the phosphate group may react with isocyanate, the flame retardant is a reactive flame retardant. Due to the reaction between the flame retardant and the isocyanate, the flame retardant is uniformly distributed in polyurethane and has a better flame-retardant effect. The flame retardant contains multiple flame-retardant components, namely polyphosphazene group, phosphate ester and phosphate salt. Due to the synergistic effect, the flame retardant has good flame-retardant properties, and can be used for various polyurethane materials.