Year: 2024
Type: article
Abstract: Ceramic saggars of mullite‐cordierite are currently used to produce cathode powders for lithium‐ion batteries. Strong interactions occur between the LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NMC) precursor in the temperature range of calcination (750–1000°C) leading to corrosion and formation of cracks in the saggar. The frequent failure of saggar causes a lot of waste, which could be reduced by choosing corrosion‐resistant materials. To understand the corrosion mechanism in the system MgO–Al 2 O 3 –SiO 2 , the materials MgO, Al 2 O 3 , MgAl 2 O 4 , and SiC (instead of SiO 2 ) were embedded in premixed NMC precursor and calcined at T = 780°C for 50, 100, 150 and 200 h. The formed phases were determined by phase and microstructure analysis. Finally, the formation of LiAlO 2 and Li 5 AlO 4 is associated with a lower growth rate of the corrosion layer compared with Li 4 SiO 4 , while MgO is inert. The reactivity with NMC can be ordered as follows: SiO 2 > Al 2 O 3 > MgO.
DOI: 10.1111/ijac.14897
Language: English
Subfield: Ceramics and Composites
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,070
OpenAlex ID: W4401974757