Electrosynthesis of Ni-Rich Cathode Materials for Li-Ion Batteries

Abstract

This study develops an electrosynthesis method for LiNi?.??Co?.??Al?.??O? (NCA) cathode materials, utilizing water oxidation to generate hydroxide ions for precursor precipitation. Systematic characterization reveals calcination temperature critically governs morphology and performance: 600°C yields porous particles with residual hydroxides, 800°C produces dense, well-crystallized structures with optimal porosity, while 950°C causes over-sintering and Al segregation. EDX shows temperature-dependent elemental distribution, with 800°C achieving ideal Ni/Co/Al integration. XRD confirms layered phase formation, and TG/DTA tracks thermal decomposition. Optimal conditions (1.5 A, 1 M concentration, 800°C calcination) yield NCA cathodes with enhanced structural stability and electrochemical activity. The work demonstrates electrosynthesis as a sustainable, controllable route for high-performance NCA production.