锂离子电池硅基负极用自乳化水乳液粘结剂及其制备方法
By grafting acrylic unsaturated monomers and double-bond-terminated polyethylene oxide onto the backbone of a water-soluble polyhydroxy polymer, a self-emulsifying water emulsion binder is formed. This solves the problem of low bonding strength of commercial water-based binders in high-silicon-content silicon-based materials, achieving efficient lithium-ion transport and electrode structure stability, and improving the cycle and rate performance of the battery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- EAST CHINA UNIV OF SCI & TECH
- Filing Date
- 2023-11-28
- Publication Date
- 2026-07-17
AI Technical Summary
Existing commercially available water-based binders have low bonding strength in silicon-based materials with high silicon content, resulting in poor cycle performance and rate performance of silicon-based anode electrodes, and cannot effectively alleviate the damage to the electrode structure caused by volume expansion.
A self-emulsifying water-based emulsion binder is used. By grafting unsaturated acrylic monomers and double-bond-terminated polyethylene oxide onto the backbone of a water-soluble polyhydroxy polymer, a physical and chemical cross-linking structure is formed, which enhances the adhesion between the active material and the current collector and promotes lithium-ion transport.
It significantly improves the cycle stability and rate performance of silicon-based anodes, enhances the bonding strength of the electrode sheets, promotes lithium-ion transport, and improves the electrochemical performance of the battery.
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