Flame-retardant electrolyte for sodium-ion battery

By adding phosphazene flame retardants to sodium-ion batteries to form a protective carbonized layer, the flammability problem of sodium-ion batteries is solved, and the battery's efficient flame retardancy and safety are improved.

CN119361828BActive Publication Date: 2025-10-21ZHEJIANG SHANGAO NEW ENERGY CO LTD
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Patent Information

Application Number
CN202411480717.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-10-23
Publication Date
2025-10-21
Estimated Expiration
2044-10-23

AI Technical Summary

Technical Problem

The flammable organic solvent system of sodium-ion batteries is prone to combustion and explosion under abuse conditions, and existing technologies make it difficult to effectively improve their safety and electrochemical performance.

Method used

Phosphazene flame retardants are used as additives to form a protective carbonized layer in sodium-ion batteries, preventing thermal decomposition of the polymer, isolating oxygen and combustion sources, and improving the flame retardant performance and safety of the battery.

Benefits of technology

Significantly delay the battery's initial combustion time, reduce self-extinguishing time, improve the battery's thermal stability and electrochemical performance, reduce fire risks, and improve overall safety.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a kind of sodium-ion battery's fire-retardant electrolyte, it is related to sodium-ion battery technical field.The specific steps include: the preparation sodium salt concentration is 0.8-1.2M conventional electrolyte, select two or more in electrolyte EC, PC, EMC Preparation, and be named as base electrolyte;Different concentrations of additive A and additive B are added in base electrolyte respectively as electrolyte additive, and the sodium-ion battery electrolyte containing different concentrations of additive is prepared.Effectively improve the electrochemical performance, safety and thermal stability of sodium-ion battery.
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Citation Information

Patent Citations

  • Polycarbonate resin composition

    CN113906093A

  • Sodium-ion battery flame-retardant electrolyte and application thereof

    CN117895077A