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

页码：4209 / 4215

页数：7

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