Battery Engineer: Principles, Materials, and Process Optimization

This comprehensive document covers the fundamental principles and performance indicators of lithium-ion batteries, including working mechanisms, key metrics like energy density and Coulombic efficiency, and methods for analyzing electrode polarization. It delves into battery capacity testing, open circuit voltage-SOC correlation, and AC impedance spectroscopy. The document extensively explores electrode material selection, comparing LFP and NCM cathodes, silicon-carbon anode failure mechanisms, solid electrolyte classifications, and sodium-ion battery advancements. Material characterization techniques such as XRD, SEM, and XPS are detailed. Process optimization sections address slurry formulation, coating edge effects, drying curves, roll press density, and cutting quality. Electrolyte formulation and additive design are covered, focusing on film-forming additives like FEC and VC, and anti-oxidation strategies for high-voltage electrolytes. This resource is essential for engineers and researchers aiming to enhance battery performance, safety, and manufacturing efficiency.