化工进展 ›› 2017, Vol. 36 ›› Issue (12): 4533-4539.DOI: 10.16085/j.issn.1000-6613.2017-0578

• 材料科学与技术 • 上一篇    下一篇

碳纳米管增强三元材料的电化学性能

陈珑, 孙晓刚, 邱治文, 蔡满园, 刘珍红, 王杰, 陈玮, 李旭   

  1. 南昌大学机电工程学院, 江西 南昌 330031
  • 收稿日期:2017-04-05 修回日期:2017-07-14 出版日期:2017-12-05 发布日期:2017-12-05
  • 通讯作者: 孙晓刚,教授,研究方向为碳纳米管和锂离子电池的研究。
  • 作者简介:陈珑(1991-),男,硕士研究生。
  • 基金资助:
    江西省科技厅科研项目(20142BBE50071)及江西省教育厅项目(KJLD13006)。

Enhancement of electrochemical performance of ternary material by using carbon nanotube as conductive additive

CHEN Long, SUN Xiaogang, QIU Zhiwen, CAI Manyuan, LIU Zhenhong, WANG Jie, CHEN Wei, LI Xu   

  1. College of Mechantronics Engineering, Nanchang University, Nanchang 330031, Jiangxi, China
  • Received:2017-04-05 Revised:2017-07-14 Online:2017-12-05 Published:2017-12-05

摘要: 以碳纳米管(MWCNTs)代替导电碳黑(SP)添加到镍钴锰(LiNi1/3Mn1/3Co1/3O2)三元材料,制成正极浆料涂覆于铝箔上并组装成扣式电池。采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)进行结构和性能表征,通过恒流放电和电化学阻抗(EIS)检测电池的电化学性能。分别对掺杂了0.5%、1.%、2%、5%、10% MWCNTs的三元材料进行电化学性能检测,结果显示,5% MWCNTs的三元材料在0.1C放电时,首次和第30次循环的放电比容量分别达到179mA·h/g和167mA·h/g;对比含5% SP的三元材料,放电比容量分别提升了9.9%和8.4%,循环稳定性和倍率性能大幅度提高。以20MPa压力对极片进行密实处理,电极的电化学性能进一步改善,首次和30次循环放电容量分别达到204mA·h/g和187mA·h/g。

关键词: 碳纳米管, 三元材料, 导电添加剂

Abstract: Carbon nanotube(MWCNTs) was used to replace super conductive black(SP)as the conductive additive for Ternary materials(NCM),which was then used to assemble coin cells in a glove box filled with argon gas. The structure and morphology were characterized by scanning electron microscopy(SEM) and transmission electron microscopy(TEM). The electrochemical performance was tested by a cell tester(CT-3008W-5V5mA-S4). Results showed that the discharge capacity of NCM with a loading of 5% MWCNTs reached 179mA·h/g and 167mA·h/g at 0.1C for the first run and after 30th cycles,respectively. This showed increases of discharge capacity by 9.9% and 8.4% compared that with 5% addition of SP. The performance of the electrodes was further improved through enhancing their density at a pressure of 20MPa,giving rise to the discharge capacities of the first run and after 30th cycles reached 204mA·h/g and 187mA·h/respectively.

Key words: carbon nanotubes, ternary material, conductive additive

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