Parameter Study on Graphite Particle Size in Lithium-Ion Batteries through Coupled Mechanical and Electrochemical Analysis

Key Points

• This research aims to evaluate how the size of graphite particles influences mechanical stress in lithium-ion batteries.
• Developed a coupled diffusion–stress model
• Simulated lithium concentration dynamics within graphite
• Assessed internal stress based on varying particle sizes
• Found that larger graphite particles lead to different internal stress patterns
• Identified key relationships between particle size and mechanical performance
• Insights could guide improvements in electrode material design