Preparation of andalusite-corundum-KAlSi2O6 material for the calcination of Li-ion battery cathode materials

© 2019 Elsevier B.V. The conventional refractory sagger materials, e.g., mullite, cordierite, and magnesium aluminum spinel, employed to calcine Li-ion battery (LIB) cathode materials, are easily attacked by the LIB material and thus have short lifetimes. To improve the corrosion resistances of refractory saggers to LIB materials, andalusite–KAlSi2O6 (KAS4) materials with different contents of in-situ KAS4 were synthesized using andalusite and KAS4 precursor calcined at 1300 °C. The microstructure evolution, phase development, corrosion resistances to Li(NixCoyMnz)O2 (LNCM) cathode materials and thermomechanical properties of the designed andalusite-KAS4 materials were characterized. The results show that the corrosion resistances of the prepared andalusite–KAS4 material were superior to those of the LNCM materials owing to the in–situ KAS4 wrapping andalusite grains. The prepared andalusite–corundum–KAS4 materials also exhibited improved strengths and appropriate thermal shock resistances compared with mullite-based refractories.

Publication year:2019

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Authors:International

Authors from:Higher Education