镁铝尖晶石对煅烧LiNixCoyMnzO2正极材料用匣钵材料性能的影响

doi:10.3969/j.issn.1001-1935.2021.02.003

耐火材料 ›› 2021, Vol. 55 ›› Issue (2): 102-106.DOI: 10.3969/j.issn.1001-1935.2021.02.003

镁铝尖晶石对煅烧LiNi_xCo_yMn_zO₂正极材料用匣钵材料性能的影响

翟鹏涛¹^,²⁾(), 刘明杨²⁾, 周文英²⁾, 陈留刚²⁾, 丁达飞²⁾, 叶国田²⁾

1)河南财经政法大学工程管理与房地产学院河南郑州 450046
2)郑州大学材料科学与工程学院河南郑州 450001

收稿日期:2020-09-17 出版日期:2021-04-15 发布日期:2021-04-15
作者简介:翟鹏涛:男,1986年生,博士,讲师。E-mail:pengtaozhai@163.com
基金资助:
国家自然科学基金资助项目(51572244);国家自然科学基金资助项目(U1604252)

Effect of magnesium aluminate spinel on properties of sagger materials for calcining LiNi_xCo_yMn_zO₂ cathode material

Zhai Pengtao¹^,²⁾(), Liu Mingyang²⁾, Zhou Wenying²⁾, Chen Liugang²⁾, Ding Dafei²⁾, Ye Guotian²⁾

1)School of Engineering Management and Real Estate,Henan University of Economics and Law,Zhengzhou 450046,Henan,China

Received:2020-09-17 Online:2021-04-15 Published:2021-04-15

摘要/Abstract

摘要：

匣钵在煅烧制备三元正极材料LiNi_xCo_yMn_zO₂(LNCM)过程中易遭受电池正极材料中Li₂O等的渗透侵蚀,而镁铝尖晶石具有良好的高温性能和抗碱侵蚀性能。通过实验室混合反应法研究了镁铝尖晶石与LNCM正极材料前驱体混合试样在800~1 100 ℃的反应,对不同温度煅烧后混合试样的物相组成和微观结构进行了分析。探究了镁铝尖晶石作为匣钵基质的可能性。研究了加入不同质量分数(3%、6%和9%)镁铝尖晶石细粉对匣钵材料强度及抗热震性能的影响。结果表明:含镁铝尖晶石细粉的匣钵适用煅烧温度低于1 000 ℃的LNCM正极材料的制备,加入量为6%(w)时,能够提高莫来石质匣钵材料的抗热震性能。

关键词: 匣钵, LiNi_xCo_yMn_zO₂材料, 镁铝尖晶石, 抗热震性

Abstract:

When preparing ternary cathode material LiNi_xCo_yMn_zO₂(LNCM),the calcining saggers are vulnerable to the penetration and corrosion of Li₂O in the cathode material. Magnesium aluminate spinel has good hot performance and alkali resistance.The reaction between magnesium aluminate spinel and the precursor of LNCM cathode material at 800-1 100 ℃ was studied by the lab mixing reaction method.The phase composition and the microstructure of the mixed samples calcined at different temperatures were analyzed.The possibility of using magnesium aluminate spinel as the sagger matrix was explored.The effects of magnesium aluminate spinel powder addition (3%,6% and 9%,by mass) on the strength and the thermal shock resistance of the sagger materials were studied.The results show that the sagger containing magnesium aluminate spinel powder is suitable for the preparation of LNCM cathode material with a calcination temperature lower than 1 000 ℃;the addition of 6% can improve the thermal shock resistance of the mullite sagger material.

Key words: sagger, LiNi_xCo_yMn_zO₂ material, magnesium aluminate spinel, thermal shock resistance

中图分类号:

TQ175

翟鹏涛, 刘明杨, 周文英, 陈留刚, 丁达飞, 叶国田. 镁铝尖晶石对煅烧LiNi_xCo_yMn_zO₂正极材料用匣钵材料性能的影响[J]. 耐火材料, 2021, 55(2): 102-106.

Zhai Pengtao, Liu Mingyang, Zhou Wenying, Chen Liugang, Ding Dafei, Ye Guotian. Effect of magnesium aluminate spinel on properties of sagger materials for calcining LiNi_xCo_yMn_zO₂ cathode material[J]. Refractories, 2021, 55(2): 102-106.

图/表 6

表1 匣钵材料配方

Table 1 Formulations of sagger materials

原料		w/%
原料		AR0	AR1	AR2	AR3
莫来石	1.5~0.5 mm	25	25	25	25
	≤1 mm	35	35	35	35
	0.075 mm	25	22	19	16
镁铝尖晶石	0.075 mm	0	3	6	9
氧化铝	0.045 mm	10	10	10	10
氧化铝微粉	d₅₀=1.5 μm	5	5	5	5
黄糊精(外加)		3	3	3	3

图1 镁铝尖晶石-LNCM正极材料前驱体试样经不同温度处理后的XRD图谱

Fig.1 XRD patterns of magnesium aluminium spinel-LNCM precursor samples heat treated at different temperatures

图2 镁铝尖晶石-LNCM正极材料前驱体试样经不同温度处理后的SEM照片和EDS图谱

Fig.2 SEM and EDS analyses of magnesium alumina spinel-LNCM precursor samples heat treated at different temperatures

图3 镁铝尖晶石加入量对匣钵材料体积密度和显气孔率的影响

Fig.3 Effect of magnesium-aluminum spinel addition on bulk density and apparent porosity of saggar materials

图4 镁铝尖晶石加入量对匣钵材料强度的影响

Fig.4 Effect of magnesium-aluminum spinel addition on strength of saggar materials

图5 镁铝尖晶石加入量对匣钵材料抗折强度保持率的影响

Fig.5 Effect of magnesium-aluminum spinel addition on residual strength retention of saggar materials

参考文献 11

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镁铝尖晶石对煅烧LiNi_xCo_yMn_zO₂正极材料用匣钵材料性能的影响

Effect of magnesium aluminate spinel on properties of sagger materials for calcining LiNi_xCo_yMn_zO₂ cathode material

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