摘要
为了改进三聚钒酸锂作为锂离子电池正极材料的电化学性能,以LiNO3、LiCl和NH4VO3作为反应原料,通过一种简单的低温熔盐合成方法(LT-MSS)在250℃温度条件下制备得到带状LiV3O8纳米材料.X射线衍射(XRD)和X射线光电子能谱(XPS)分析结果表明所得产物为单斜相LiV3O8.扫描电镜(SEM)、透射电镜(TEM)和高分辨透射电镜(HRTEM)照片显示该产物为单晶纳米带形貌,沿[001]方向生长.电化学测试表明该产物储锂量高,循环性能良好.实验结果表明采用低温熔盐合成法制备LiV3O8能够有效提高所得产物的结构、形貌和电化学性能.
To improve the electrochemical properties of lithium trivanadate as cathode active material for lithium ion battery, a facile low temperature molten-salt synthesis （LT-MSS） method was developed to prepare LiV3O8 nanobelts at 250 ℃, using LiNO3 , LiCl and NH4VO3 as starting materials. X-ray diffraction （XRD） and X-ray photoelectron spectroscopy （XPS） results indicate that the products are pure phase monoclinic LiV3O8 . Scanning electron microscopy （SEM）, transmission electron microscopy （TEM） and high-resolution transmission electron microscopy （HRTEM） images show that the products are single crystalline nanobelts and grow along [001 ] direction. Electrochemical tests indicate that the products yield high Li ^＋ storage capacity and perform well in the electrochemical cycle testing. Experimental resuhs demonstrate that the synthesis method contributes to the improvement in structural, morphological and electrochemical properties of the obtained lithium trivanadate.
出处
《纳米技术与精密工程》
EI
CAS
CSCD
2009年第4期285-289,共5页
Nanotechnology and Precision Engineering
关键词
熔盐合成
三聚钒酸锂
纳米带
锂离子电池
电化学性质
molten-salt synthesis
lithium trivanadate
nanobelt
lithium ion battery
electrochemical properties
