核壳结构米粒状FeS2/C纳米材料制备及储锂性能研究

doi:10.11949/0438-1157.20201507

化工学报 ›› 2021, Vol. 72 ›› Issue (5): 2849-2856.DOI: 10.11949/0438-1157.20201507

• 材料化学工程与纳米技术 • 上一篇下一篇

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.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

收稿日期:2020-10-28 修回日期:2020-12-21 出版日期:2021-05-05 发布日期:2021-05-05
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)

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

XIA Qing^1,^2,³(),XU Yuxing^1,²,ZHOU Yuncheng¹,JI Xueqian¹,FENG Hailan^1,²,WANG Pengfei^1,²,TAN Qiangqiang^1,^2,⁴()

^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

摘要/Abstract

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

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

中图分类号:

TQ 152

夏青, 徐宇兴, 周运成, 纪雪倩, 冯海兰, 王鹏飞, 谭强强. 核壳结构米粒状FeS₂/C纳米材料制备及储锂性能研究[J]. 化工学报, 2021, 72(5): 2849-2856.

XIA Qing, XU Yuxing, ZHOU Yuncheng, JI Xueqian, FENG Hailan, WANG Pengfei, TAN Qiangqiang. Preparation and lithium storage performance of rice-like core-shell FeS₂/C nanoparticles[J]. CIESC Journal, 2021, 72(5): 2849-2856.

图/表 8

图1 所制备FeS2/C复合材料和纯FeS2的XRD谱图

Fig.1 XRD patterns of the as-prepared FeS2/C composite and pure FeS2

图2 FeS2/C复合材料的拉曼光谱

Fig.2 Raman spectrum of the FeS2/C composite

图3 FeS2/C样品在空气中的TGA结果

Fig.3 TGA result of FeS2/C sample under air atmosphere

图4 前体(a)、FeS2样品(b)以及FeS2/C样品(c)的场发射电镜照片； FeS2/C样品的透射电镜照片[(d)~(f)]

Fig.4 FESEM images of the precursor (a), FeS2 sample (b), and FeS2/C sample (c); TEM images of FeS2/C sample[(d)—(f)]

图5 米粒状FeS2/C复合材料合成过程示意图

Fig.5 Schematic illustration of the formation process for rice-like FeS2/C composite

图6 FeS2/C电极的循环伏安图和容量电压曲线图

Fig.6 CV curves and charge-discharge profiles for FeS2/C electrode

图7 FeS2/C和FeS2电极的循环性能(a)以及阶梯倍率循环性能(b)

Fig.7 Cycling performance of FeS2/C and FeS2 electrodes(a); Rate capability of FeS2/C electrode(b)

图8 FeS2/C和FeS2电极的阻抗谱

Fig.8 Nyquist plots of FeS2/C and FeS2 electrodes

参考文献 18

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核壳结构米粒状FeS₂/C纳米材料制备及储锂性能研究

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

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