Synthesis and characterization of mono-dispersion LiNi0.8Co0.1Mn0.1O2 micrometer particles for lithium-ion batteries

LiNi_0.8Co_0.1Mn_0.1O₂ cathode material for lithium-ion battery exhibits high capacity, but it suffers from interfacial side reactions and structural/thermodynamic instability, which leads to capacity reduction and safety problems. Cubic brick (Ni_0.8Co_0.1Mn_0.1)C₂O₄·2H₂O particles with micron size are synthesized by co-precipitation method. The oxalic precursor is sintered with lithium hydroxide to obtain cubic mono-dispersion LiNi_0.8Co_0.1Mn_0.1O₂ micrometer particles. Structural stability, cycling performance, rate capability and compacting density of the cubic mono-dispersion material are investigated. Conventional spherical and irregular mono-dispersion LiNi_0.8Co_0.1Mn_0.1O₂ are also prepared for comparison. The results reveal that the cubic mono-dispersion LiNi_0.8Co_0.1Mn_0.1O₂ dramatically enhances the structural stability and cycling performance at a little cost of capacity and rate capability.