Related Experiment Video
Updated: Jun 1, 2026

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
Synchronously Restraining the Phase Transition and Structural Defect through a Unique Dopant Strategy for
Zhongmin Ren1, Shuaishuai Chen2, Xingnan Xia1
1National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei, Hefei, Anhui 230026, China.
This study enhances sodium-ion battery cathodes by doping iron and tantalum into manganese-based layered oxides. This improves structural stability, leading to better performance and longer cycle life for sodium-ion batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- P2-type sodium manganese-based layered oxides exhibit poor stability.
- Bulk and interfacial structural instability cause phase transitions and defects.
Purpose of the Study:
- To enhance the bulk and interfacial stability of P2-type sodium manganese-based layered oxide cathodes.
- To improve cycling performance and structural integrity for sodium-ion batteries.
Main Methods:
- Synthesized P2-Na0.67Ni0.25Mn0.75O2@Fe2O3@Ta2O5 (Na2575-Fe-Ta) cathode material.
- Investigated the effects of Fe and Ta doping on material structure and electrochemical properties.
Main Results:
- Fe doping mitigated unfavorable phase transitions and lattice parameter variations.
- Ta doping formed an in situ NaTaO3 layer, reducing oxygen release and parasitic reactions.
- The Na2575-Fe-Ta cathode delivered 214.9 mAh/g at 0.1 C and 64.6% capacity retention after 200 cycles at 0.5 C.
Conclusions:
- Synergistic doping of Fe and Ta improves both bulk and interfacial stability.
- This one-step doping method is promising for P2-Na0.67Ni0.25Mn0.75O2 cathodes in sodium-ion batteries.
More Related Videos
Related Concept Videos
Formation of Complex Ions
Batteries and Fuel Cells
Potentiometry: Membrane Electrodes
Ion Exchange
Electrochemical Systems
The Electrical Double Layer

