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Synthesis Pathway of Layered-Oxide Cathode Materials for Lithium-Ion Batteries by Spray Pyrolysis
Manar Almazrouei1,2, Sulki Park1, Maurits Houck1,3
1Department of Engineering, University of Cambridge, Cambridge CB2 1PZ, United Kingdom.
ACS Applied Materials & Interfaces
|June 24, 2024
Summary
We synthesized lithium cobalt oxide (LCO) cathode materials using aerosol spray pyrolysis, optimizing synthesis temperatures to enhance structural and electrochemical properties for advanced lithium-ion batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Chemical Engineering
Background:
- Lithium cobalt oxide (LiCoO2 or LCO) is a critical cathode material for lithium-ion batteries.
- Optimizing LCO synthesis is essential for improving battery performance and energy density.
- Aerosol spray pyrolysis offers a scalable method for producing advanced battery materials.
Purpose of the Study:
- To investigate the impact of synthesis temperatures (600-1000 °C) on LCO cathode material properties.
- To analyze the structural, morphological, and electrochemical characteristics of LCO derived from different precursors.
- To establish correlations between synthesis conditions and LCO performance for optimized battery applications.
Main Methods:
- Aerosol spray pyrolysis was employed for LCO synthesis using nitrate and acetate precursors.
- Material characterization included X-ray diffraction (XRD), Raman spectroscopy, thermogravimetric analysis (TGA), and scanning electron microscopy (SEM).
- High-temperature XRD (HT-XRD) was utilized to study phase evolution during annealing.
Main Results:
- Synthesis temperature significantly influenced LCO crystallinity, morphology, and phase formation.
- Nitrate-derived LCO particles exhibited hollow spherical shapes, while acetate-derived particles were irregular.
- Optimized annealing conditions yielded well-defined layered LCO structures with high initial discharge capacities (up to 179 mAh/g for nitrate-based LCO).
Conclusions:
- Synthesis temperature and precursor choice critically affect LCO cathode material properties.
- Aerosol spray pyrolysis parameters can be tuned to achieve desirable structural and electrochemical performance.
- This research provides insights for high-throughput synthesis of advanced LCO cathode materials for lithium-ion batteries.
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