无机材料学报 ›› 2018, Vol. 33 ›› Issue (3): 301-306.DOI: 10.15541/jim20170095 CSTR: 32189.14.10.15541/jim20170095

所属专题: 离子电池材料

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Fe2O3纳米纤维锂离子电池负极材料的制备及其电化学性能研究

蔡建信1, 李志鹏1, 李巍1, 赵鹏飞1, 杨震宇2, 吁霁2   

  1. 1. 南昌大学 资源环境与化工学院, 南昌 330031;
    2. 南昌大学 化学学院, 南昌 330031
  • 收稿日期:2017-02-27 修回日期:2017-05-18 出版日期:2018-03-20 网络出版日期:2018-03-12
  • 基金资助:
    国家自然科学基金(21263016, 21363015, 51662029)

Synthesis and Electrochemical Performance of Fe2O3 Nanofibers as Anode Materials for LIBs

CAI Jian-Xin1, LI Zhi-Peng1, LI Wei1, ZHAO Peng-Fei1, YANG Zhen-Yu2, YU Ji2   

  1. 1. College of Resources Environmental & Chemical Engineering, Nanchang University, Nanchang 330031, China;
    2. College of Chemistry, Nanchang University, Nanchang 330031, China
  • Received:2017-02-27 Revised:2017-05-18 Published:2018-03-20 Online:2018-03-12
  • Supported by:
    National Natural Science Foundation of China (21263016, 21363015, 51662029)

摘要:

Fe2O3具有理论比容量高和价格低廉等特点, 已成为锂离子电池负极材料的研究热点之一。实验以不同质量比PVP/FeCl3溶液为前驱体, 静电纺丝技术制备PVP/FeCl3纳米纤维并热处理, 得到不同直径的Fe2O3纳米纤维负极材料, 并以水热合成法制备了Fe2O3纳米颗粒。利用X射线衍射、热重、红外光谱、扫描电镜、透射电镜和恒流充放电等测试手段对材料的物相、微观形貌和电化学性能进行表征。结果表明, Fe2O3纳米纤维比Fe2O3纳米颗粒表现出更优的电化学性能, 直径为160 nm的Fe2O3纳米纤维负极材料的倍率性能和循环性能最佳, 材料在0.1 A/g电流密度下的可逆容量为827.3 mAh/g;在2 A/g电流密度下70次循环放电比容量有439.1 mAh/g。

 

关键词: 三氧化二铁, 静电纺丝, 纳米纤维, 负极材料, 锂离子电池

Abstract:

Due to high theoretical specific capacity and low cost, Fe2O3 has become an attractive research field in anode materials for lithium-ion batteries (LIBs). In this study, by using PVP/FeCl3 solutions with different concentrations as precursors, Fe2O3 nanofibers with different diameters were prepared by electrospinning technology and anneal treatment. In addition, Fe2O3 nanoparticles were prepared by hydrothermal synthesis method. The crystalline structure, morphology and electrochemical performances of the composites were investigated by X-ray diffraction, thermogravimetric analysis, infrared spectrum, scanning electron microscope, transmission electron microscope, and charge-discharge tests. Results showed that Fe2O3 nanofibers has better electrochemical performance than Fe2O3 nanoparticles. Fe2O3 nanofibers with diameter of 160 nm exhibited the highest rate and cycle performance as anode material in LIBs. It was found that the Fe2O3 electrode could deliver a discharge capacity of 827.3 mAh/g at 0.1 A/g current density and 439.1 mAh/g at 2 A/g after 70 cycles.

Key words: Fe2O3, nanofiber, electrospinning, anode material, lithium ion battery

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