Interactions of Li2O volatilized from ternary lithium-ion battery cathode materials with mullite saggar materials during calcination

In recent years, the rapid development of Li(NixCoyMn1-x-y)O2 (LNCM) materials for application in ternary lithium-ion batteries has led to an increased demand for refractory kiln saggars in industries. However, saggars used for firing ternary Li-ion battery cathode materials are often subjected to severe corrosion and spalling. To investigate the damage mechanism of the saggar materials, non-contact corrosion experiments were designed to study the effects of the precursor additions, calcination temperature, and number of calcinations during the interaction between mullite saggar and LNCM materials. The phase composition and microstructure of the mullite saggar specimens before and after corrosion were characterized using X-ray diffraction and scanning electron microscopy, respectively, to obtain a comprehensive understanding of the causes of the deterioration of mullite saggar materials during corrosion.

Automated summary

In recent years, the increasing demand for refractory kiln saggars has accompanied the rapid development of Li(NixCoyMn1-x-y)O2 (LNCM) materials in ternary lithium-ion batteries. However, saggars used for firing ternary Li-ion battery cathode materials often suffer from severe corrosion and spalling. In this study, non-contact corrosion experiments were conducted to investigate the damage mechanism of mullite saggar materials during interaction with LNCM materials. The phase composition and microstructure of the mullite saggars were analyzed to gain insights into the causes of the deterioration during corrosion.