Positive electrode active material and method for manufacturing the same, positive electrode tab, battery, and electrical equipment
A sodium-ion battery cathode material with controlled Fe 2+ content and specific composition enhances electron transfer and energy density, addressing the need for improved energy density and stability in sodium-ion batteries.
JP2026524884APending Publication Date: 2026-07-24BEIJING EASPRING MATERIAL TECH CO LTD
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Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- BEIJING EASPRING MATERIAL TECH CO LTD
- Filing Date
- 2024-07-31
- Publication Date
- 2026-07-24
AI Technical Summary
Technical Problem
The existing sodium-ion battery cathode materials, particularly Na x MO2, face challenges in maintaining cost competitiveness due to declining lithium prices and a need for improved energy density and reduced cost per watt-hour.
Method used
A positive electrode active material with controlled Fe 2+ content change (Δn ≧ 0.1) and specific composition (Na a1 Ni x1 Fe y1 Mn z1 Zn m1 Ca n1 M p1 O2) is developed, along with a manufacturing method involving calcination and sieving, to enhance electron transfer and energy density.
Benefits of technology
The proposed material increases the capacity and energy density of sodium-ion batteries by optimizing Fe valence changes and particle properties, improving air stability and electrochemical performance.
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Abstract
The present invention discloses a positive electrode active material and a method for producing the same, a positive electrode tab, a battery, and an electrical device, and relates to the art of batteries. In the positive electrode active material, Fe 2+ The change in content Δn ≥ 0.1, where Δn = n1 - n2, where n1 is the Fe content in the positive electrode active material before charging. 2+ This is the content of Fe in the positive electrode active material when n2 is charged to 4.0V. 2+ This is the content of Fe 2+ Fe content = Fe content in positive electrode active material 2+ Amount of substance / (Fe in positive electrode active material) 2+ Amount of substance + Fe in the positive electrode active material 3+ This is the amount of substance. As a result, when this positive electrode active material is used, the battery containing this positive electrode active material will have an excellent energy density.
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