储能科学与技术 ›› 2019, Vol. 8 ›› Issue (1): 116-122.doi: 10.12028/j.issn.2095-4239.2018.0122

• 研究及进展 • 上一篇    下一篇

高容量高倍率的氮掺杂二次粒子石墨负极材料

李荣辉1, 闫伟2, 吴晓强2, 樊沁娜3   

  1. 1 力神电池股份有限公司, 天津 300384;
    2 内蒙古民族大学, 内蒙古 通辽 028000;
    3 石家庄铁道大学, 河北 石家庄 050043
  • 收稿日期:2018-07-20 修回日期:2018-10-11 出版日期:2019-01-01 发布日期:2018-10-25
  • 通讯作者: 李荣辉(1983-),男,高级工程师,主要从事锂离子电池快充电化学体系研究,E-mail:lrh031776@163.com。
  • 作者简介:李荣辉(1983-),男,高级工程师,主要从事锂离子电池快充电化学体系研究,E-mail:lrh031776@163.com。
  • 基金资助:
    内蒙古自治区高校科研资助计划（NJZY18159）。

Nitrogen doped secondary particle graphite anode for high capacity and high rate Li ion battery

LI Ronghui1, YAN Wei2, WU Xiaoqiang2, FAN Qinna3   

  1. 1 Tianjin Lishen Battery Joint Stock Co. LTD., Tianjin 300384, China;
    2 Inner Mongolia University for the Nationalities, Tongliao 028000, Inner Mongolia, China;
    3 Shijiazhuang Tiedao University, Shijiazhuang 050043, Hebei, Chian
  • Received:2018-07-20 Revised:2018-10-11 Online:2019-01-01 Published:2018-10-25

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摘要： 本研究采用低成本易量产的方法制备了二次粒子黏接的石墨负极材料，并对其进行了氮掺杂，制备出具备高比容量和高倍率特性的锂离子电池负极材料。在扣式电池测试中，该材料表现出359.8 mA·h/g的可逆容量，组装的软包装全电池最小比能量可达230 W·h/kg，体积能量密度可达650 W·h/L。该软包装电池具备良好的3 C快速充电能力，充电容量可以在10 min内达到额定容量的51%，30 min即可充满电量，表现出极好的快速充电特性。在室温下进行3 C倍率充电和1 C倍率放电的循环测试中，循环1000次循环后容量保持率依然超过88%的初始容量，循环厚度膨胀率为10.1%，可满足大多数电子设备和电动汽车的需求。

关键词: 氮掺杂, 二次粒子黏接, 高容量, 快充

Abstract: The high specific capacity with high rate characteristic graphite anode was synthesized by nitrogen doping and secondary particle bonding technologies. The reversible capacity of the obtained graphite was 359.8mAh/g. The full pouch cells with the minimal energy density of 230Wh/Kg (650Wh/L) were assembled to evaluate the electrical performance. The charging capacity can research 51% within 10 minutes, and 100% within 30 minutes, demonstrating an excellent fast charging characteristics. The fast charge cycle test with 3C-rate charge and 1C-rate discharge was conducted at room temperature. It shows that even after 1000 cycles, there is still 88% of the initial capacity, and the maximum swelling rate is 10.1%, which can meet the demand of most electron devices and electric vehicles.

Key words: N doped graphite, secondary particle, fast charge, high specific capacity

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