Revealing the Dual Role of Ammonia in the Hydroxide Co-Precipitation Synthesis of Cobalt-Free Nickel-Rich LiNiMnAlO (NMA955) Cathode Materials for Lithium-Ion Batteries.

Nickel-rich cobalt-free LiNiMnAlO (NMA955) is considered a promising cathode material to address the scarcity and soaring cost of cobalt. Particle size and elemental composition significantly impact the electrochemical performance of NMA955 cathodes. However, differences in precipitation rates among metal ions coveys a challenge in obtaining cathode materials with the desired particle size and composition via hydroxide co-precipitation synthesis.