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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
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Dual lanthanides synergistically boost stability and kinetics for spinel LiMn2O4 cathodes
Zhushun Zhang1, Jun Du2, Tenghao Li3
1School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu, China.
Communications Chemistry
|January 8, 2026
Summary
Dual-lanthanide doping in lithium manganese oxide (LMO) cathodes enhances stability and ion diffusion. This strategy overcomes limitations of single doping, improving battery performance and longevity.
Area of Science:
- Materials Science
- Electrochemistry
- Inorganic Chemistry
Background:
- Manganese-site doping in spinel LiMn2O4 (LMO) aims to reduce Jahn-Teller distortion.
- Existing doping strategies face trade-offs: low-valent doping weakens oxygen bonds, while high-valent doping increases Mn3+ content.
Purpose of the Study:
- To overcome limitations of single doping in LMO by proposing dual-lanthanide (La3+/Ce3+) co-doping.
- To investigate the synergistic effects of La and Ce co-doping on LMO cathode performance.
Main Methods:
- Sol-gel synthesis was employed to prepare LiLa0.1Ce0.1Mn1.8O4 (LLCMO).
- Electrochemical characterization was performed to evaluate battery performance, including capacity, cycling stability, and ion diffusion.
Main Results:
- LLCMO demonstrated suppressed lattice distortion with reduced Mn3+ content (43.13%) due to La doping.
- Ce doping (mixed Ce3+/Ce4+) enhanced charge delocalization and conductivity.
- LLCMO exhibited a 3.2-fold increase in Li+ diffusion coefficient compared to pristine LMO.
- The LLCMO cathode delivered 111.2 mAh g-1 at 0.5 C with 90.9% retention after 100 cycles, and 76.0 mAh g-1 after 1000 cycles at 10 C.
Conclusions:
- Dual-lanthanide co-doping of La and Ce offers a synergistic approach to enhance LMO cathode stability and kinetics.
- This strategy effectively mitigates Mn dissolution and stabilizes the spinel framework.
- The findings establish a generalizable design principle for improving diverse cathode materials through synergistic doping.
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