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Updated: May 9, 2026

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Published on: November 12, 2013

Dual-Functional Lanthanum Doping: Stabilizing Cathodes by Simultaneously Mitigating Na⁺/Vacancy Ordering and Oxygen

Mingjie Dong¹, Jiale Chen^2,3, Wei Cao^2,3

¹School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen 518055, China.

Chem & Bio Engineering

|March 4, 2026

Summary

Introducing lanthanum (La) into P2-type sodium-ion battery cathodes enhances stability and rate performance by suppressing oxygen release and improving sodium-ion distribution. This La doping strategy boosts energy density and cycling stability for advanced battery materials.

Keywords:

Li/Mn-based layered oxides Na site rearrangement Na+/vacancy ordering anionic redox lanthanum doping

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Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing

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Published on: June 9, 2023

Area of Science:

Materials Science
Electrochemistry
Solid-State Chemistry

Background:

P2-type layered oxides (Na_xLi_yMn_1-yO₂) are promising sodium-ion battery cathodes due to high capacity from anionic redox.
Challenges include Na⁺/vacancy ordering and irreversible oxygen release, limiting rate capability and stability.

Purpose of the Study:

To investigate the effect of trace lanthanum (La) doping on P2-Na_0.6Li_0.2Mn_0.8O₂ cathode performance.
To elucidate the mechanisms behind La's influence on sodium-ion distribution, oxygen stability, and electrochemical properties.

Main Methods:

Synthesis of La-doped P2-type layered oxides.
Electrochemical testing (cycling, rate capability).
In situ/ex situ characterization and theoretical calculations.

Main Results:

La doping altered Na⁺ distribution and suppressed Na⁺/vacancy ordering.
High La-O bond energy stabilized lattice oxygen, preventing irreversible oxygen release.
Optimized La-doped cathode (LM-La0.04) showed high capacity (193.5 mAh g^-1 at 0.2 C) and excellent rate performance (86.8 mAh g^-1 at 10 C).
Remarkable capacity retention during long-term cycling was observed.

Conclusions:

Trace La doping is an effective strategy to enhance the electrochemical performance of P2-type layered oxide cathodes.
Lanthanum improves structural integrity and redox reversibility by stabilizing oxygen and modifying sodium-ion dynamics.
This work offers a viable doping approach for developing high-energy, stable anion-redox cathode materials for sodium-ion batteries.