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

doi:10.11896/cldb.22040351

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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.

Key words： spodumene lithium cobalt oxide cathode material agger corrosion resistance

Published: 25 November 2023 Online: 2023-11-21

CLC number:

TQ175.71

Fund:National Natural Science Foundation of China (51872266, 52172031) and Henan Provincial Science and Technology Research Project (222102230030).

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	HE Siyao
	WEI Chuang
	KANG Xin
	LI Suping

Cite this article:

HE Siyao,WEI Chuang,KANG Xin, et al. Effects of Spodumene Addition on the Properties of Saggers for Calcined Lithium Cobalt Oxide Cathode Materials[J]. Materials Reports, 2023, 37(22): 22040351-6.

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http://www.mater-rep.com/EN/10.11896/cldb.22040351 OR http://www.mater-rep.com/EN/Y2023/V37/I22/22040351

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