摘要
本研究采用水热法、阳离子交换法和后续煅烧处理,制备出相似于梅花结构的EuVO_(4)-V_(2)O_(5)复合物纳米线。后续煅烧处理为在空气中煅烧,温度分别为300和500℃,并且发现随着煅烧温度不断增加,EuVO_(4)-V_(2)O_(5)纳米线表面上的纳米颗粒发生了一定的团聚,当温度升高至500℃时,纳米线出现了融化。其中,300℃煅烧制备的EuVO_(4)-V_(2)O_(5)复合物纳米线的电化学储锂性能较好,在电流密度为30 mA·g^(-1)下经过50次循环后的放电比容量仍保持有377 mAh·g^(-1),表现出良好的循环稳定性,并且本研究开发了一种新的稀土钒酸盐合成路径。
The EuVO_(4)-V_(2)O_(5)composite nanowire with plum blossom structure was prepared by hydrothermal method,cation-exchange and calcination method.The EuVO_(4)-V_(2)O_(5)nanowire electrode materials were calcined at 300 and 500℃.The results show that as the temperature continues to increase,the nanoparticles on the surface of the EuVO_(4)-V_(2)O_(5)nanowires have a certain agglomeration.When the temperature increases to 500℃,the nanowires melt.Among them,the EuVO_(4)-V_(2)O_(5)composite nanowire prepared by calcination at 300℃has the best electrochemical performance,and the charge-discharge specific capacity remains 377 mAh·g^(-1)after 50 cycles with a current density of 30 mA·g^(-1),showing good cycle stability,and this study develops a new synthetic route of rare earth vanadate.
作者
徐学留
方东
易健宏
李广忠
Xu Xueliu;Fang Dong;Yi Jianhong;Li Guangzhong(Kunming University of Science and Technology,Kunming 650093,China;Northwest Institute for Nonferrous Metal Research,Xi’an 710016,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2022年第4期1488-1496,共9页
Rare Metal Materials and Engineering
基金
科技部重点专项(2021YFE0104300)
云南省重点专项(202002AB080001)
稀贵金属综合利用新技术国家重点实验室开放课题(SKL-SPM-202023)。
