Synthesis and Characterization of N-Rich Cathodes Metal Oxides Core-Shell Materials for High-Performance Li-Ion Batteries

Abstract

One of the state-of-the-art cathode materials for lithium-ion batteries is nickel (Ni)-rich lithium nickel manganese cobalt oxide since it has high specific energy and cost-effectiveness. However, the challenges of the Ni-rich cathodes includes cation mixing, micro-crack, metal dissolution into the electrolyte, and parasitic reaction that cause battery failure. To address such issues, this work studies the synergistic effects of the protection layer of the cathode with the core–shell structure using a solvent-free mechano-fusion process and the pillar by doping high-valent metal ions into the structure of the N-rich cathode by annealing at high temperature, which can enhance the performance and life cycle of 18650 cylindrical battery cells.