Effects of Spodumene Addition on the Properties of Saggers for Calcined Lithium Cobalt Oxide Cathode Materials
HE Siyao1, WEI Chuang2, KANG Xin1, LI Suping1,*
1 Henan Key Laboratory of High Temperature Functional Ceramics, Zhengzhou University, Zhengzhou 450052, China 2 CNPC Pipeline Research Institute, Langfang 065000, Hebei, China
Abstract: In order to improve the properties of cordierite-mullite sagger and prolong its service life, spodumene fine powder is used to partially replace the cordierite fine powder in cordierite-mullite sagger materials. The effects of spodumene addition on the amorphous phase content, sintering properties, mechanical properties, phase composition and microstructure of cordierite-mullite sagger materials and corrosion resistance of lit-hium cobalt oxide cathode materials were studied. The results show that with the introduction of spodumene, the system changes from MgO-Al2O3-SiO2 to Li2O-MgO-Al2O3-SiO2 quaternary system, the lowest eutectic temperature decreases, the content of amorphous phase increases, the porosity of the material decreases, and the strength of the sagger materials increases first and then decreases. When the spodumene addition is 4wt%, the cold modulus of rupture, cold crushing strength and hot modulus of rupture at 1 100 ℃ of the sagger material reach the maximum values, which are 13.5 MPa, 95.8 MPa and 11.3 MPa, respectively. The residual flexural strength of the materials after thermal shock increases first and then decreases with the increase of spodumene addition, and the retention rate of residual strength decreases slightly. The sagger material with 4wt% spodumene addition has the best corrosion resistance to lithium cobalt oxide cathode.
何思瑶, 魏闯, 康鑫, 李素平. 锂辉石含量对煅烧钴酸锂正极材料用匣钵材料性能的影响[J]. 材料导报, 2023, 37(22): 22040351-6.
HE Siyao, WEI Chuang, KANG Xin, LI Suping. Effects of Spodumene Addition on the Properties of Saggers for Calcined Lithium Cobalt Oxide Cathode Materials. Materials Reports, 2023, 37(22): 22040351-6.
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2023, Vol. 37 
