Reactant morphology is critical for determining the kinetics of solid-state reactions. While the morphology of the TM precursor is highly controlled, this is generally not the case for Li 2 CO 3 in academic literature. Curiously, the particle size and morphology of Li 2 CO 3 is almost never reported in positive electrode material synthesis literature, despite the well-recognized importance of reactant morphology in solid-state synthesis. A mechanistic understanding of the role of this parameter is needed.