Dry-method binder as well as preparation method and application thereof
By setting an elastic polymer layer on the surface of the fibrotic bondable material, the problem of side reaction of dry adhesive in the battery is solved, the cycle stability and Coulomb efficiency of the battery are improved, and the structural stability and electrochemical performance of the electrode are improved.
CN120519105APending Publication Date: 2025-08-22SVOLT ENERGY TECHNOLOGY CO LTD
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Patent Information
- Application Number
- CN202510702070.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-28
- Publication Date
- 2025-08-22
AI Technical Summary
Technical Problem
The existing dry adhesives are prone to side reactions in batteries, resulting in reduced battery capacity and poor cycle stability, especially at low negative potential.
Method used
An elastic polymer layer is provided on the surface of the fibrotic bonding material, and a cladding layer is formed by polymerizing monomers under heat treatment or ultraviolet irradiation to isolate the contact between the matrix material and the active lithium and conductive agent to form a stable adhesive network.
Benefits of technology
The structural stability and electrochemical performance of the dry electrode are improved, the cycle stability and Coulomb efficiency of the battery are improved, and the structural stability and electrochemical performance of the electrode are improved.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to the technical field of batteries, in particular to a dry binder as well as a preparation method and application thereof. The dry binder comprises a base material and an elastic polymer layer arranged on the surface of the base material, the base material comprises a fibrillated binding material; the elastic polymer layer is formed by polymerizing polymeric monomers, and the polymeric monomers comprise at least one of tetrahydro-2H-2-pyrone, trimesoyl chloride, trimethylene carbonate and trifluoropropene. According to the dry-method binder, the elastic polymer layer is stable at low potential, cannot react with components in a battery and can isolate a base material from being in contact with active lithium and a conductive agent, the elastic polymer layer can still form wrapping in the fibration process of the fibration binder, and therefore the structure of a dry-method electrode is more stable, and the service life of the dry-method electrode is prolonged. And the cycling stability and coulombic efficiency of the battery can be improved.
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