Membrane coating slurry for semi-solid battery and preparation method thereof

By coating PI particles with TiO2 and modifying with APTMDS, the prepared separator coated slurry improves the heat resistance and mechanical strength of the separator, solves the problem of poor compatibility between the separator coated slurry and the separator, and achieves the long-term stability of the separator and the battery circulation performance.

CN120248704APending Publication Date: 2025-07-04ANHUI LIKE NEW MATERIAL TECHNOLOGY CO LTD
View PDF 2 Cites 1 Cited by

Patent Information

Application Number
CN202510395103.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-31
Publication Date
2025-07-04

AI Technical Summary

Technical Problem

The compatibility between the existing lithium battery separator coating slurry and the separator is poor, which causes the slurry to fall off easily and reduces the heat resistance of the separator.

Method used

The PI particles were coated with TiO2 and the interface bonding strength was enhanced by APTMDS modification to prepare a semi-solid battery separator coating slurry, including PI-COOH@TiO2/APTMDS, dispersants, wetting agents, thickening agents and binders, and prepared by etching, soaking, ultrasonic cleaning and vacuum drying.

Benefits of technology

The heat resistance and mechanical strength of the diaphragm are improved, the bonding strength of the inorganic-organic interface is enhanced, the formation of SEI layer is stabilized, the formation of lithium dendrites is inhibited, and the circulation stability of the battery and the long-term uniformity of the diaphragm are improved.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure BDA0005338401990000101
    Figure BDA0005338401990000101
Patent Text Reader

Abstract

The invention discloses diaphragm coating slurry for a semi-solid battery and a preparation method of the diaphragm coating slurry, and belongs to the field of lithium battery diaphragms. The diaphragm coating slurry for the semi-solid battery is prepared from the following components in parts by weight: 10 to 15 parts of PI-COOH-coated TiO2 / APTMDS, 2 to 4 parts of a dispersing agent, 2 to 4 parts of a wetting agent, 2 to 4 parts of a thickening agent, 4 to 8 parts of a binding agent and 70 to 85 parts of water, the PI-COOH (at) TiO2 / APTMDS is prepared by the following steps: immersing PI particles into a NaOH solution for etching, and washing the PI particles with an acetic acid solution to obtain PI-COOH; the preparation method comprises the following steps: soaking PI-COOH in a TiOSO4 solution, carrying out ultrasonic cleaning, and heating to obtain PI-COOH coated TiO2; the preparation method comprises the following steps: dipping PI-COOH-coated TiO2 into an APTMDS methanol solution, standing, washing, and carrying out vacuum drying, so as to obtain PI-COOH-coated TiO2 / APTMDS.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Lithium battery diaphragm ceramic coating slurry and ceramic coating diaphragm

    CN110190234A

  • Coating slurry for lithium battery diaphragm and coating process

    CN113517517A

Cited By

  • Preparation method of double-diaphragm electrolyte-free all-solid-state lithium battery

    CN121260938A