Enhanced Electrochemical Performance of FeWO4 by Coating Nitrogen-Doped Carbon

被引：44
作者：
Gong, Chen [1 ]
Bai, Yu-Jun [1 ,2 ]
Feng, Jun [1 ]
Tang, Rui [1 ]
Qi, Yong-Xin [1 ]
Lun, Ning [1 ]
Fan, Run-Hua [1 ]
机构：
[1] Shandong Univ, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Peoples R China
[2] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
来源：
ACS APPLIED MATERIALS & INTERFACES | 2013年 / 5卷 / 10期
基金：
中国国家自然科学基金;
关键词：
cyclic performance; rate capability; hydrothermal treatment; impedance; N-doping tungstate; LITHIUM-ION; ANODE MATERIAL; TUNGSTEN TRIOXIDE; INTERCALATION; FABRICATION; ELECTRODES; CAWO4;
D O I：
10.1021/am400392t
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
FeWO4 (FWO) nanocrystals were prepared at 180 degrees C by a simple hydrothermal method, and carbon-coated FWO (FWO/C) was obtained at 550 degrees C using pyrrole as a carbon source. The FWO/C obtained from the product hydrothermally treated for 5 h exhibits reversible capacities of 771.6, 743.8, 670.6, 532.6, 342.2, and 184.0 mAh g(-1) at the current densities of 100, 200, 400, 800, 1600, and 3200 mA g(-1), respectively, whereas that from the product treated for 0.5 h achieves a reversible capacity of 205.9 rnAh g(-1) after cycling 200 times at a current density of 800 mA g(-1). The excellent electrochemical performance of the FWO/C results from the combination of the nanocrystals with good electron transport performance and the nitrogen-doped carbon coating.
引用
收藏
页码：4209 / 4215
页数：7
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