Sodium supplement material and preparation method thereof, positive electrode sheet, and sodium ion battery

CN118867246BActive Publication Date: 2025-09-23XIAMEN HITHIUM ENERGY STORAGE TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202410916800.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-07-09
Publication Date
2025-09-23
Estimated Expiration
2044-07-09

AI Technical Summary

Technical Problem

In existing sodium-supplementing materials, the conductive agent and catalyst are connected by simple physical mixing, which leads to separation in the positive electrode active material, affecting the conductivity and catalytic properties, limiting the effect of the sodium-supplementing material, and the oxidation decomposition potential is relatively high.

Method used

By regulating the mixing ratio of the sodium supplement raw materials, the conductive agent and the catalyst and the calcination conditions, a structure in which the sodium supplement body is embedded with the conductive agent and catalyst particles is formed, ensuring that the conductive agent and catalyst are exposed on the surface, shortening the electron transmission distance, and improving the conductivity and catalytic effect.

Benefits of technology

The oxidative decomposition potential of the sodium-supplementing material is reduced, the first-cycle sodium-supplementing effect of the sodium-supplementing material is improved, and the energy density and cycle performance of the sodium-ion battery are enhanced.

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Abstract

The present application provides a sodium-supplementing material and a preparation method thereof, a positive electrode plate, and a sodium-ion battery, wherein the sodium-supplementing material includes a sodium-supplementing agent body and first particles exposed on the surface of the sodium-supplementing agent body. In any 300nm×200nm area on the surface of the sodium-supplementing material, the number of the first particles is between 2 and 20, and the first particles include conductive agent particles and catalyst particles.
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Citation Information

Patent Citations

  • Additive for supplementing lithium or sodium as well as preparation method and application of additive

    CN116454281A

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