新型锂离子电池材料FeS2/VGCF的合成与电性能研究

doi:10.3724/SP.J.1077.2013.13076

无机材料学报 ›› 2013, Vol. 28 ›› Issue (12): 1291-1295.DOI: 10.3724/SP.J.1077.2013.13076 CSTR: 32189.14.SP.J.1077.2013.13076

新型锂离子电池材料FeS₂/VGCF的合成与电性能研究

刘玲¹, 袁中直¹, 邱彩霞¹, 程思洁¹, 刘金成²

(1. 华南师范大学化学与环境学院, 广州510006; 2. 惠州亿纬锂能股份有限公司, 惠州 516006)

收稿日期:2013-02-01 修回日期:2013-04-27 出版日期:2013-12-20 网络出版日期:2013-11-15
作者简介:刘玲(1986–), 女, 硕士研究生. E-mail:liuling_0212@163.com
基金资助:
广东省科技计划(2012B010200040)

Synthesis and Electrochemical Characteristics of the Novel FeS₂/VGCF Material for Lithium-Ion Batteries

LIU Ling¹, YUAN Zhong-Zhi¹, QIU Cai-Xia¹, Cheng Si-Jie¹, LIU Jin-Cheng²

(1. School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China; 2.??EVE Energy Co. Ltd, Huizhou 516006, China)

Received:2013-02-01 Revised:2013-04-27 Published:2013-12-20 Online:2013-11-15
About author:LIU Ling. E-mail:liuling_0212@163.com
Supported by:
Science and Technology Foundation of Guangdong Province (2012B010200040)

摘要/Abstract

摘要： 以草酸亚铁(FeC₂O₄·2H₂O)、硫粉(S)、气相生长的碳纤维(VGCF)为原料, 通过固相法合成了锂离子电池材料FeS₂/VGCF。采用X射线衍射(XRD)、扫描电镜(SEM)、循环伏安(CV)和恒流充放电循环等方法对合成材料的结构、形貌以及电化学性能进行了表征。结果表明: 合成的二硫化亚铁材料呈条块状。在1.0~2.6 V(vs Li / Li⁺)电压范围内, 以0.1C(1C=890 mA/g)倍率进行恒电流充放电, FeS₂与FeS₂/VGCF的放电容量分别为692、872 mAh/g, 在0.5C倍率下, 经过50、100、200次循环后纯FeS₂的放电比容量分别为268、71、28 mAh/g, 而FeS₂/VGCF的放电比容量可分别保持在469、417、254 mAh/g, 较之无VGCF修饰的FeS₂材料表现出良好的倍率性能和循环性能。

关键词: 锂离子电池；FeS₂/VGCF, 固相法；倍率性能, 循环性能

Abstract: FeS₂/VGCF battery material was prepared by solid-state method using FeC₂O₄·2H₂O, S and Vapor-Grown Carbon Fiber (VGCF) as the starting materials. The synthesized material was characterized by means of X-ray diffraction (XRD), scanning electron microscope (SEM), cyclic voltammograms (CV) and galvanostatic charge/discharge cycling tests. The result shows that the material of VGCF presents string centers. The discharge specific capacity of the FeS₂ and FeS₂/VGCF electrodes can reach 692 and 872 mAh/g at 0.1C in the voltage range of 1.0 to 2.6 V (vs Li / Li⁺), respectively. The FeS₂/VGCF electrode can sustain 469, 417 and 254 mAh/g after 50, 100 and 200 cycles at 0.5C (1C = 890 mA/g), much higher than those of FeS₂ prepared without VGCF (268, 71 and 28 mAh/g). Compared with FeS₂, the cyclic capacity and stability of FeS₂/VGCF are improved.

Key words: lithium-ion battery, FeS2/VGCF, solid-state method, rate capacity, cycling stability

中图分类号:

O646

刘玲, 袁中直, 邱彩霞, 程思洁, 刘金成. 新型锂离子电池材料FeS₂/VGCF的合成与电性能研究[J]. 无机材料学报, 2013, 28(12): 1291-1295.

LIU Ling, YUAN Zhong-Zhi, QIU Cai-Xia, Cheng Si-Jie, LIU Jin-Cheng. Synthesis and Electrochemical Characteristics of the Novel FeS₂/VGCF Material for Lithium-Ion Batteries[J]. Journal of Inorganic Materials, 2013, 28(12): 1291-1295.

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新型锂离子电池材料FeS₂/VGCF的合成与电性能研究

Synthesis and Electrochemical Characteristics of the Novel FeS₂/VGCF Material for Lithium-Ion Batteries

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