Effect of Reaction Conditions on the Coprecipitation of Ni(OH)<sub>2</sub> for Lithium‐Ion Batteries
Pekka Tynjälä, Petteri Laine, Juho Välikangas, Toni Kauppinen, Ulla Lassi
Abstract
Abstract Electrochemical performance of cathode active materials (CAMs) is dependent on the properties of coprecipitated precursors (pCAMs). This is a sensitive process affected by several reaction parameters such as temperature, pH, concentration of reactants, agitation rate, and residence time. In this paper, the effect of parameters influencing the particle size growth and the physical properties, such as particle morphology and tapped density, was studied in the coprecipitation of Ni(OH) 2 . Formation of a homogeneous population with narrow particle size distribution was observed, followed by a more heterogeneous population of dense particles. Ammonia concentration and residence time had significant effects on particle size growth and morphology, but agitation rate also had an impact.