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Updated: May 2, 2026
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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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Constructing Stable Sub/Surface Structure to Boost Superior Cyclabilities of Single-Crystalline Ni-Rich Cathode
Youqi Chu1,2, Kai Wang3, Changdong Chen1
1Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, P. R. China.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|August 30, 2025
Summary
This study enhances single-crystalline nickel-rich cathodes using dual modification. The improved cathodes show excellent structural and electrochemical stability for high-energy lithium-ion batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- Single-crystalline Ni-rich cathodes face challenges like transition metal dissolution and phase instability during high-voltage cycling.
- These issues limit the practical application of high-energy lithium-ion batteries.
Purpose of the Study:
- To develop a dual-modification strategy for single-crystalline LiNi0.90Co0.05Mn0.05O2 (SCNCM90) cathodes.
- To enhance structural robustness and electrochemical durability under prolonged high-voltage operation.
Main Methods:
- Implementing a subsurface Al/B gradient co-doping.
- Applying an Al5BO9 surface coating.
- Conducting electrochemical cycling tests at high voltage.
Main Results:
- Al/B gradient doping suppressed the H2-H3 phase transition and reduced lattice strain.
- Al5BO9 coating mitigated electrode-electrolyte interfacial reactions.
- The modified SCNCM90 cathode achieved 95.83% capacity retention after 200 cycles at 4.5 V and 89.6% after 1000 cycles at 1C.
Conclusions:
- The dual-modification strategy effectively improves the structural and electrochemical stability of single-crystalline Ni-rich cathodes.
- This approach offers a promising route for next-generation high-energy lithium-ion batteries.
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