Damage mechanism and corrosion resistance improvement of corundum-mullite kiln furniture during calcining of Li-ion cathode materials

In order to improve the cleanliness of cathode materials of Li ion batteries (LIBs), it is necessary to develop and apply advanced kiln furniture. Low-impurities Corundum-mullite materials (CMM) with were prepared, and the damage mechanism in LNCM production was studied. Innovatively amplify the corrosion process in the form of prefabricated cracks and explore their interaction mechanism. Based on the corrosion mechanism, Si-Al sol was selected as a binder to replace PVA. The corrosion resistance of CMM with Si-Al sol was significantly improved. With the improvement of calcination temperature and purity requirements of LIBs, the research and development of this advanced CMM kiln furniture has a good application prospect in the future.