Layered ternary oxide lithium nickel manganese cobalt oxide, LiNi0.5Co0.2Mn0.3O2 (NCM523, or NMC532), has displayed great advantages in its relatively high energy density, low cost, low toxicity, cycle stability and safety as battery materials for electric vehicles. NCM523 is one of the most important cathode materials for next-generation lithium (Li) ion batteries due to its high capacity and cost effectiveness compared with LiCoO2. It has been reported to have a reversible capacity of 160 mAh g-1 at 4.3 V (vs. Li/Li+) and 190 mAh g-1 at 4.5 V (vs. Li/Li+). Compared with LiCoO2 cathode material, less use of Co reduces the cost; Ni contributes to a higher capacity at the expense of complicated preparation and Mn enhances the structural stability during charging/discharging.

With low contents of cheap materials graphene (0.5 wt%) and Al2O3 (1.0 wt %) as additives, the cyclic stability, energy density and thermal safety of the lithium ion battery (LIBs) can be dramatically improved. The assembled cell of NCM523-Al2O3-Gs∥graphite delivered an impressive capacity retention of 76.9% at 3.0 C after 400 cycles. The heat generation during the discharging under 3.0 C and safety tests are also both superior to those of a pure NCM cell.

Technical Data

Lithium Nickel Manganese Cobalt Oxide (LiNi0.5Co0.2Mn0.3O2) Powder