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Preparation of size-controlled LiCoPO
Takashi Yanagishita1, Raraka Otomo1, Hideki Masuda1
1Department of Applied Chemistry, Tokyo Metropolitan University 1-1 Minamiosawa Hachioji Tokyo 192-0397 Japan yanagish@tmu.ac.jp.
RSC Advances
|June 5, 2023
Summary
This study demonstrates a method for creating size-controlled composite metal oxide particles using membrane emulsification. These particles, including lithium cobalt phosphate for batteries, show improved properties with optimized fabrication and heat treatment.
Area of Science:
- Materials Science
- Nanotechnology
- Electrochemistry
Background:
- Monodisperse droplet preparation is crucial for controlled particle synthesis.
- Membrane emulsification offers precise control over droplet size.
- Composite metal oxide particles are vital for advanced energy storage applications.
Purpose of the Study:
- To apply membrane emulsification with anodic porous alumina for size-controlled composite metal oxide particle fabrication.
- To investigate the synthesis of size-controlled lithium cobalt phosphate particles.
- To evaluate the performance of these particles as cathode active materials for lithium-ion secondary batteries.
Main Methods:
- Utilizing anodic porous alumina membranes for droplet generation.
- Employing an aqueous solution of monomers and metal salts as the dispersed phase.
- Solidifying droplets in a continuous phase followed by heat treatment.
Main Results:
- Successfully fabricated size-controlled composite metal oxide particles, including lithium cobalt phosphate.
- Demonstrated that particle size and heat treatment conditions significantly impact cathode properties.
- Achieved improved electrochemical performance in lithium-ion secondary batteries using fabricated LiCoPO4 particles.
Conclusions:
- Membrane emulsification is an effective technique for producing size-controlled composite metal oxide particles.
- Optimized fabrication and post-treatment enhance the performance of cathode active materials.
- The developed method is versatile for various metal oxide particles with potential applications in energy storage and functional devices.
