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Regulated Synthesis of Sodium-Ion Cathode Materials: Two High-Performance Spherical Layered Metal Oxides
Xiangnan Li1,2, Mengdan Zhang1,2, Xinyu Tang1,2
1School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|February 25, 2025
Summary
This study introduces a new method for preparing spherical sodium nickel manganese oxide (NaNi1/3Fe1/3Mn1/3O2 or NFM111) materials. The novel approach enhances particle density and rate performance by reducing undesirable NiO impurities.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Sodium nickel manganese oxide (NaNi1/3Fe1/3Mn1/3O2 or NFM111) is a promising cathode material for sodium-ion batteries due to its high capacity and environmental stability.
- Previous synthesis methods, like solid-phase ball milling, resulted in NiO impurities, compromising structural integrity and performance.
- Addressing these limitations is crucial for advancing NFM111 applications.
Purpose of the Study:
- To develop an improved synthesis route for spherical NFM111.
- To mitigate NiO impurity formation during NFM111 preparation.
- To evaluate the impact of spherical morphology on material properties and performance.
Main Methods:
- Spherical NFM111 synthesized using a coprecipitation and prilling technique.
- Characterization of material morphology and phase purity.
- Comparison of properties with NFM111 prepared via solid-phase ball milling.
Main Results:
- Successfully synthesized spherical NFM111 particles.
- Significantly reduced NiO impurity peaks compared to previous methods.
- Enhanced tap density and improved rate performance of the spherical NFM111.
- Comparative analysis of synthesis methods provided insights into their respective advantages and disadvantages.
Conclusions:
- Coprecipitation and prilling offer a superior method for preparing spherical NFM111 with enhanced properties.
- The reduction of NiO impurities is key to improving structural stability and electrochemical performance.
- This research provides valuable references for the future production and optimization of spherical NFM111 materials.
