Lithium nickel manganese cobalt oxide, lithium-niobate coated NMC811 cathode active material – Sigma-Aldrich

Synonyms
LiNbO3-coated NMC811, NMC811

General Description
Lithium niobate coated NMC811 is a powdered form of lithium nickel manganese cobalt oxide with a stoichiometry of 8:1:1 Ni:Mn:Co and a typical particle size of 4-10 microns. The particles are coated in 5-10 nm amorphous lithium niobate, less than 1 wt.%. Our NMC811 has a minimum nickel content of 80.0% of the metal content (≥48.2 wt% overall), translating to a nickel-rich composition between NMC811 and NMC85:05:10.

Applications
Lithium niobium oxide-coated NMC811 is a high-performance cathode material for solid-state and high-voltage lithium-ion batteries (LIBs). With 80% nickel content, NMC811 offers superior specific energy compared to NMC111, NMC532, or NMC622. The LiNbO3 coating enhances cathode stability by protecting the electrode and electrolyte from undesired reactions. Research suggests that this coating reduces capacity fade over time and restricts the release of metal ions from the NMC cathode, mitigating reactions with the electrolyte. The LiNbO3 “insertion layer” further improves rate capability by minimizing the space charge layer barrier at the electrolyte/cathode interface, leading to enhanced Li diffusion and reduced electrode polarization.

Features & Benefits

• NMC811 gives high specific energy density
• LiNbO3 coating safeguards cathode and electrolyte, enhancing coulombic efficiency
• LiNbO3 insertion layer enhances rate capability