A positive electrode active material, a positive electrode sheet including the same, and a hybrid lithium-sodium ion battery

By mixing Prussian blue-like materials with polyanionic materials and embedding them into the interstices of cubic blocks, the problem of low energy density in lithium-sodium ion batteries was solved, resulting in a high-energy-density cathode material and improved electrochemical performance.

CN116741945BActive Publication Date: 2026-07-17ZHUHAI COSMX BATTERY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHUHAI COSMX BATTERY CO LTD
Filing Date
2022-03-02
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

The low energy density of existing lithium-sodium ion batteries limits their application areas, and existing cathode materials are difficult to store lithium ions and sodium ions simultaneously, affecting electrochemical performance.

Method used

A high-energy-density cathode sheet is prepared by mixing Prussian blue-based materials with polyanionic materials and embedding polyanionic materials into the cubic gaps of Prussian blue-based materials to increase the compaction density of the cathode material.

Benefits of technology

It improves the energy density of hybrid lithium-sodium ion batteries, enhances electrochemical performance, and strengthens the ability of cathode materials to store lithium and sodium ions.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a positive electrode active material, a positive electrode sheet comprising the positive electrode active material and a hybrid lithium-sodium ion battery. Prussian blue type materials and polyanion type materials have the ability to simultaneously store lithium ions and sodium ions, but the crystal structure framework of the Prussian blue type material is large, and the theoretical density is low, resulting in a low compaction density of the electrode, and most of the particles are cubic blocks, which is not conducive to the construction of a high energy density system. In the application, the polyanion type material is mixed with the Prussian blue type material, the polyanion can be embedded in the cubic block gap of the Prussian blue, and the high theoretical density of the polyanion can improve the compaction density of the positive electrode of the hybrid lithium-sodium ion battery, which is conducive to improving the energy density of the hybrid lithium-sodium ion battery.
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