无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2024, Vol. 56 ›› Issue (9): 44-53.doi: 10.19964/j.issn.1006-4990.2023-0575

• 研究与开发 • 上一篇    下一篇

氧化铝溶胶改性锂离子电池正负极材料的研究

田朋1(), 张浩然1, 徐金钢1, 牟晨曦1, 徐前进2, 宁桂玲1   

  1. 1.大连理工大学化工学院,辽宁 大连 116023
    2.江西宝弘纳米科技有限公司,江西 宜春 331208
  • 收稿日期:2023-11-30 出版日期:2024-09-10 发布日期:2024-02-18
  • 作者简介:田朋(1983— ),博士,副教授,主要研究方向是氧化铝精细化学品的开发与工业化基础;E-mail:tianpeng@dlut.edu.cn
  • 基金资助:
    大学生创新创业训练计划项目(20231014110003);江西省技术创新引导类计划项目-科技合作专项(2021BDH81011);江西省主要学科与学术带头人培养项目-领军人才计划(20213BCJ22020)

Study on aluminum sol modified anode and cathode materials for lithium ion batteries

TIAN Peng1(), ZHANG Haoran1, XU Jingang1, MOU Chenxi1, XU Qianjin2, NING Guiling1   

  1. 1.School of Chemical Engineering,Dalian University of Technology,Dalian 116023,China
    2.Jiangxi Baohong Nano Technology Co.,Ltd.,Yichun 331208,China
  • Received:2023-11-30 Published:2024-09-10 Online:2024-02-18

摘要:

随着电动汽车和清洁能源的发展,对锂离子电池的储能能力和循环寿命提出了更高的要求。采用氧化铝溶胶浸渍-包覆法对NCM811正极材料和G/SiO负极材料进行改性。此方法与硝酸铝浸渍法相比热分解产生的氮氧化物量降低99%以上,相较于沉淀法无副产物,成本低于有机铝盐法,均匀性高于干法混合,易于实现规模化生产。表征发现氧化铝溶胶的加入并不会影响正负极材料的结构和充放电机理。电化学性能测试表明,当氧化铝添加量分别为0.3%和0.7%(质量分数)时,可以分别使得正极材料NCM811和负极材料G/SiO获得最优的倍率性能和循环稳定性能。在1C充放电下,将NCM811和0.3%氧化铝改性的NCM811分别与锂片组装成锂离子电池后循环100次,其容量分别为123.55 mA·h/g和151.02 mA·h/g。在0.1C充放电下,将G/SiO负极和0.7%氧化铝改性的G/SiO负极分别与锂片组装成锂离子电池后循环45次,其容量分别为360.57 mA·h/g和385.06 mA·h/g。

关键词: 氧化铝溶胶, 锂离子电池, 正极材料, 负极材料, 表面改性

Abstract:

With the development of electric vehicles and clean energy,higher requirements are put forward for the energy storage capacity and cycle life of lithium-ion batteries.In this paper,the positive electrode material of NCM811 and the negative electrode material of G/SiO were modified by alumina sol impregnation-coating method.Compared with the aluminum nitrate impregnation method,the amount of nitrogen oxides produced by thermal decomposition was reduced by more than 99%.Compared with the precipitation method,there were no by-products,the cost was lower than the organoaluminum salt method,and the uniformity was higher than the dry method,and it was easy to achieve scale.It was found that the addition of alumina sol did not affect the structure and charge and discharge mechanism of anode and cathode materials.The electrochemical performance test shows that the anode material NCM811 and cathode material G/SiO could obtain the best rate performance and cycle stability when the amount of alumina was 0.3% and 0.7%,respectively.Under 1C charge and discharge,the NCM811 and 0.3% alumina modified NCM811 were assembled into lithium-ion batteries with lithium sheets,and the cycles were 100 times,and the capacities were 123.55 mA·h/g and 151.02 mA·h/g,respectively.At 0.1C charge and discharge,the G/SiO cathode and 0.7% alumina modified cathode were assembled with lithium sheets to form a lithium-ion battery and then cycled for 45 times,with a capacity of 360.57 mA·h/g and 385.06 mA·h/g,respectively.

Key words: alumina sol, lithium-ion batteries, anode material, cathode material, surface modification

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