Effect of aggregate particle content on sintering and corrosion resistance of hibonite-cordierite saggar

摘要

? 2022 Elsevier Ltd and Techna Group S.r.l.An effective method to improve the corrosion resistance of the saggar to the cathode material for Li-ion batteries is to reduce the reaction between Li2O and the components of the saggar matrix material. Saggars are multi-component and multi-graded functional materials, in which aggregate particles are an important factor in resisting corrosive media. Consequently, in this study, hibonite with good alkali corrosion resistance was selected as the main raw material to prepare hibonite-cordierite composite saggars with different aggregate particle contents. The effect of the aggregate particle content on the sintering performance and corrosion resistance of CA6-M2A2S5 saggars was systematically studied. The results show that the optimal hibonite aggregate content for saggar performance is 40 wt%, its bulk density is 2.44 g/cm3, and the cold and hot moduli (1100 °C × 30 min) of rupture are 15.66 MPa and 14.67 MPa, respectively, the strength retention rate of the sample after five thermal cycles at 1100 °C × 30 min was 53.30%. Additionally, during the sintering process, a dense anorthite protective layer was formed along the edges of the CA6 particles, which hindered the reaction between the positive electrode material and saggar sample body, thereby improving the corrosion resistance of the saggar.