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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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Lithium salt-derived artificial near-surface reconfiguration to stabilize high-voltage LiCoO2
Jun-Ke Liu1,2, Guo-Dong Bai1, Zu-Wei Yin1
1College of Energy, Xiamen University, 361005, Xiamen, China. yinzuwei@xmu.edu.cn.
Chemical Communications (Cambridge, England)
|January 6, 2025
Summary
This study introduces a dual-modified lithium cobalt oxide (LCO) material that enhances battery stability. The new LCO material demonstrates improved capacity retention during charging and discharging cycles.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- High charging cut-off voltages in lithium cobalt oxide (LCO) batteries cause structural instability.
- This instability leads to capacity fade and reduced battery lifespan.
Purpose of the Study:
- To develop a novel dual-modified LCO material for enhanced electrochemical performance.
- To suppress structural degradation and electrolyte side reactions at high voltages.
Main Methods:
- One-step dual modification of LCO via thermodynamic decomposition of lithium salts.
- Achieving F-doped bulk and LiF & LiBO surface coating layers.
- Investigating the material's stability during repeated lithiation/delithiation cycles.
Main Results:
- The modified LCO exhibited suppressed cobalt dissolution and structural deconstruction.
- Reduced electrolyte side reactions were observed.
- High capacity retention of 81.4% after 150 cycles (0.5C) and 81.7% after 300 cycles (2C) was achieved between 3.0-4.6 V.
Conclusions:
- The artificial near-surface reconfiguration effectively enhances LCO stability.
- The dual-modified LCO shows significant potential for high-voltage battery applications.
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