Effects of strontium substitution for La on the electrochemical performance of LaAlO3 perovskite nanotubes
Songtao Dong, Xin Ye, Zhuang Fu, Xiaoyun Jin, Junlin Wei, Lei Wang, Yamei Zhang
Abstract
In this study, a series of La1−xSrxAlO3 (x = 0.0, 0.1, 0.15, and 0.2) nanotubes were prepared by electrospinning method, and their morphological and electrochemical properties were characterized. The results show that the La1−xSrxAlO3 (x = 0.0, 0.1, 0.15, and 0.2) nanotubes exhibit a distinct hollow structure, the average diameters of the nanofibers are ∼75 nm, 70 nm, 95 nm, and 142 nm. The electrochemical results show that the La1−xSrxAlO3 nanotubes have excellent electrochemical performance, and the maximum specific capacitance of 180 F/g for the La0.9Sr0.1AlO3. After 1500 charge–discharge cycles, the specific capacitance of the La0.9Sr0.1AlO3 electrode retained ∼99%, indicating that it has good cycling stability and long service life. This provides a promising electrode material for supercapacitors.