Li3V2(PO4)3/C nanofibers composite as a high performance cathode material for lithium-ion battery

被引：75
作者：
Chen, Quanqi [1 ,2 ]
Zhang, Tingting [2 ]
Qiao, Xiaochang [2 ]
Li, Diquan [3 ]
Yang, Jianwen [1 ]
机构：
[1] Guilin Univ Technol, Coll Chem & Bioengn, Guilin 541004, Peoples R China
[2] Xiangtan Univ, Sch Chem, Xiangtan 411105, Peoples R China
[3] Cent S Univ, Sch Geosci & Infophys, Changsha 410083, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2013年 / 234卷
关键词：
Nanofibers; Lithium vanadium phosphate; Electrospinning method; Lithium-ion batteries; Composite; CARBON-COATED LI3V2(PO4)(3); SOL-GEL METHOD; ELECTROCHEMICAL PERFORMANCE; VANADIUM PHOSPHATE; CAPACITY; SHELL;
D O I：
10.1016/j.jpowsour.2013.01.164
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A novel Li3V2(PO4)(3)/C nanofibers composite has been first prepared by a facile and environmentally friendly electrospinning method using NH4VO3, CH3COOLi, poly (4-vinyl) pyridine (PVP) and citric acid aqueous solution as raw materials. The composite is investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM) and electrochemical tests. The Li3V2(PO4)(3)/C nanofibers composite exhibits excellent cycle performance and good rate capability in the voltage range of 3.0-4.8 V. The composite displays a high discharge capacity of 190 mAh g(-1) (close to theoretical capacity of 197 mAh g(-1)) at 0.1 C (19.7 mA g(-1)). Even at a high-rate of 20 C, the composite presents the discharge capacity of 132 mAh g(-1) and good cycle performance. The outstanding electrochemical performance is attributed to the particular morphology and microstructure of Li3V2(PO4)(3)/C nanofibers composite that dispersive Li3V2(PO4)(3) nanofibers and carbon nanofibers aggregate to form nanofibers composite with mesopores and large surface area. (c) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：197 / 200
页数：4
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