Authors: Harald Norrud Pollen
Title: LiNi0.8Mn0.1Co0.1O2 synthesised through an oxalic acid co-precipitation
Affiliation: Norwegian University of Science and Technology
LiNi0.8Mn0.1Co0.1O2 (NMC 811) is a Ni-rich layered oxide which has received attention as a future cathode material for Li-ion batteries. The high Ni-content yields a high capacity. However, low Co- and Mn-content is detrimental to the capacity retention and the thermal stability. Surface reconstructions caused by side reactions with the electrolyte at a highly delithiated state are considered one of the main failure mechanisms. A strategy to improve both the cycle life and thermal stability is to coat the material surface, creating a physical barrier to the electrolyte. In order to achieve high capacities, the coating has to be in the low nm regime and cover the entire external surface. To enable an even coating a suitable NMC 811 baseline material with a narrow size distribution and smooth surface is needed. This work concerns NMC 811 synthesised through an oxalic acid co-precipitation. The effects of certain precipitation parameters are analysed and discussed.