耐火材料 ›› 2023, Vol. 57 ›› Issue (6): 495-499.DOI: 10.3969/j.issn.1001-1935.2023.06.007

• 研究开发 • 上一篇    下一篇

锂离子电池正极材料用莫来石溶胶结合匣钵材料的性能研究

鞠茂奇1), 程水明1), 夏昌勇1), 梁永和2), 丛培源1), 聂建华2)   

  1. 1)中冶武汉冶金建筑研究院有限公司 湖北武汉 430081
    2)武汉科技大学 省部共建耐火材料与冶金国家重点实验室 湖北武汉 430081
  • 收稿日期:2022-12-05 发布日期:2023-12-25
  • 作者简介:鞠茂奇:男,1995年生,博士,工程师。E-mail:mcc_maoqiju@126.com

Properties of sagger materials bonded by mullite-sol for cathode materials of lithium ion batteries

Ju Maoqi, Cheng Shuiming, Xia Changyong, Liang Yonghe, Cong Peiyuan, Nie Jianhua   

  1. First author's address: Wuhan Metallurgical Construction Research Institute Co.,Ltd.of MCC,Wuhan 430081,Hubei,China
  • Received:2022-12-05 Published:2023-12-25

摘要: 为进一步提升锂离子电池正极材料用匣钵材料的性能,以莫来石(3~1、≤1 mm)、堇青石(≤1 mm)、镁铝尖晶石(≤0.088 mm)和刚玉(≤1 mm)等为主要原料,以莫来石溶胶为结合剂,在150 MPa的压力下压制成25 mm×25 mm×140 mm的试样,于110 ℃烘24 h,再经1 400 ℃保温3 h,制备了锂离子电池正极材料用匣钵试样。研究莫来石溶胶加入量(加入质量分数分别为0、3%、4%、5%、6%)对其性能的影响。结果表明:1)经110 ℃干燥24 h后的莫来石溶胶呈网络状结构,经1 000 ℃热处理后完全转化为莫来石相;2)当莫来石溶胶加入量为5%(w)时,试样具有较好的综合性能,其体积密度为2.83 g·cm-3,显气孔率为14.6%,常温抗折强度为8.4 MPa,水冷5次后的常温强度保持率为79.8%。

关键词: 莫来石溶胶, 匣钵, 物理性能, 抗侵蚀性

Abstract: In order to further improve the properties of sagger materials for lithium ion batteries cathode materials,green samples with dimensions of 25 mm×25 mm×140 mm were prepared using mullite (3-1,and ≤1 mm),cordierite (≤1 mm),magnesium aluminate spinel (≤0.088 mm) and corundum (≤1 mm) as main raw materials,and mullite-sol as the binder,pressing under 150 MPa.Sagger samples for lithium cell cathode materials were prepared by drying the green samples at 110 ℃ for 24 h and then insulating at 1 400 ℃ for 3 h.Effects of mullite-sol additions (0,3%,4%,5%,and 6%,by mass) on the properties of the samples was researched.The results show that:(1)the mullite-sol shows a network structure after drying at 110 ℃ for 24 h,but it completely transforms into mullite phase after hot treatment at 1 000 ℃;(2)with 5% mullite-sol addition,the sagger shows good comprehensive properties with the bulk density of 2.83 g·cm-3,apparent porosity of 14.6%,cold modulus of rupture of 8.4 MPa,cold strength retention ratio of 79.8% after 5 thermal shocks by water quenching.

Key words: mullite-sol, sagger, physical properties, corrosion resistance

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