Abstract: A method of stabilizing Nickel-rich (NMC) cathode materials includes mixing a feedstock of transition metal sulfates, ammonia, and a basic solution to under bubbling of an inert gas to form a reaction solution, precipitating transition metal hydroxide particles from the reaction solution over a first period of time to precipitate the transition metal hydroxide particles therein to form a metal sulfate solution. The method further includes altering the pH of the metal sulfate solution, supplying a Mn-rich feedstock to the metal sulfate solution to form a Mn-rich solution, and precipitating Mn-rich hydroxide nanoparticles from the Mn-rich solution onto surfaces of the transition metal hydroxide particles over a second period of time to form a heterogeneous precursor.