CIESC Journal ›› 2021, Vol. 72 ›› Issue (5): 2849-2856.DOI: 10.11949/0438-1157.20201507

• Material science and engineering, nanotechnology • Previous Articles     Next Articles

Preparation and lithium storage performance of rice-like core-shell FeS2/C nanoparticles

XIA Qing1,2,3(),XU Yuxing1,2,ZHOU Yuncheng1,JI Xueqian1,FENG Hailan1,2,WANG Pengfei1,2,TAN Qiangqiang1,2,4()   

  1. 1.State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
    2.Zhongke Langfang Institute of Process Engineering, Langfang Economic & Technical Development Zone, Langfang 065001, Hebei, China
    3.Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
    4.Hebei Technology Innovation Center of Advanced Energy Materials, Langfang 065001, Hebei, China
  • Received:2020-10-28 Revised:2020-12-21 Online:2021-05-05 Published:2021-05-05
  • Contact: TAN Qiangqiang

核壳结构米粒状FeS2/C纳米材料制备及储锂性能研究

夏青1,2,3(),徐宇兴1,2,周运成1,纪雪倩1,冯海兰1,2,王鹏飞1,2,谭强强1,2,4()   

  1. 1.中国科学院过程工程研究所多相复杂系统国家重点实验室,北京 100190
    2.中科廊坊过程工程研究院,河北 廊坊 065001
    3.中国科学院绿色过程制造创新研究院,北京 100190
    4.河北省先进能源材料技术创新中心,河北 廊坊 065001
  • 通讯作者: 谭强强
  • 作者简介:夏青(1987—),女,博士,副研究员,qxia@ipe.ac.cn
  • 基金资助:
    河北省自然科学基金项目(E2019103017);国家自然科学基金项目(51902310);河北省重点研发计划项目(19214407D)

Abstract:

The rice grain-like FeS2/C nanomaterial with core-shell structure was prepared by anion displacement reaction. The prepared composite shows enhanced inoic and electronic conductivity, excellent electrolyte infiltration characteristics, and capability of buffering the volume change. When evaluated as anode of lithium ion batteries, the FeS2/C electrodes exhibit high reversible capacity of 1100 mA·h·g-1 at 100 mA·g-1 and outstanding rate capability. Even at high current density of 2 A·g-1, a reversible capacity of 866 mA·h·g-1 can be achieved. The results in this paper provide new ideas and methods for the preparation of other core-shell materials.

Key words: lithium ion batteries, iron disulfide, core-shell structure, nanomaterials, composites, electrochemistry

摘要:

通过阴离子置换反应制备出具有核壳结构的米粒状FeS2/C纳米材料。所制备材料具有较高的离子和电子电导,优异的电解液浸润特性,以及缓冲材料体积变化的能力。在作为锂离子电池负极材料时,FeS2/C电极具有较高的可逆比容量以及优秀的倍率性能,100 mA·g-1电流密度下可逆比容量高达1100 mA·h·g-1,在2 A·g-1的大电流密度下,依然有866 mA·h·g-1可逆比容量。研究结果为其他核壳材料的制备提供了新的思路和方法。

关键词: 锂离子电池, 二硫化铁, 核壳结构, 纳米材料, 复合材料, 电化学

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