Preparation method of ultra-small high-entropy sulfide lithium-sulfur battery diaphragm modified material

Ultra-small high entropy sulfide nanospheres were prepared by synthesis of polyacrylic acid templates and solvent heat treatment, which solved the performance problems caused by the shuttle effect in lithium-sulfur batteries, and achieved high capacity, good cycle performance and long-life battery separator modification materials.

CN119706969APending Publication Date: 2025-03-28NORTHEAST NORMAL UNIVERSITY
0 Cites 0 Cited by

Patent Information

Application Number
CN202411843870.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-14
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

In existing lithium-sulfur batteries, capacity and cyclic performance are affected due to the shuttle effect of soluble lithium polysulfide between electrodes, and traditional high-entropy sulfide synthesis methods are difficult to control the size and dispersion of nanoparticles.

Method used

[Fe/Cr](OH)3/[Co/Ni/Mn](OH)2/PAA-NH4 nanospheres were synthesized by hydrolyzing the five metal salts and solvothermal reaction with thioacetamide to prepare nanospheres composed of ultra-small high entropy sulfide nanosecondary units.

Benefits of technology

The prepared HES nanospheres have good dispersion and small size. As a lithium-sulfur battery separator modification material, it significantly improves the cycle stability and rate performance of the battery and extends the service life.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a preparation method of an ultra-small high-entropy sulfide lithium-sulfur battery diaphragm modification material, which comprises the following steps: by taking polyacrylic acid (PAA) as a template, synthesizing [Fe / Cr] (OH) 3 / [Co / Ni / Mn] (OH) 2 / PAA-NH4 nanospheres by hydrolyzing five metal salts, and carrying out solvothermal reaction on the nanospheres and thioacetamide to obtain nanospheres consisting of ultra-small HES nano secondary units. The HES nanosphere prepared by the invention is unique in structure, is composed of a plurality of ultra-small HES nano secondary units with the size of about 10 nm, is stable in structure, and can adsorb soluble polysulfides, inhibit side reactions and enhance redox reaction of the polysulfides due to the unique cocktail effect.
Need to check novelty before this filing date? Find Prior Art