Electrochemical performance of a portable asymmetric supercapacitor device based on cinnamon-like La2Te3 prepared by a chemical synthesis route

• Main Authors: Patil, Swati J, Patil, Bebi H, Bulakhe, Ravindra N, Lokhande, Chandrakant D
• Format: Article
• Language: English
• ISSN: 2046-2069
• DOI: 10.1039/c4ra09124h

A cinnamon-like La 2 Te 3 nanostructure has been prepared by a simple chemical bath deposition (CBD) route. Field emission-scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy techniques have been used to characterize the morphological and structural properties of the La 2 Te 3 thin films. The prepared La 2 Te 3 thin film electrodes are applied in a supercapacitor, in which they exhibited a high specific capacitance value of 469 F g −1 at a scan rate of 2 mV s −1 with an excellent cycling performance up to 1000 cycles. Even at a specific power of 2.5 kW kg −1 , the La 2 Te 3 electrode possessed a specific energy of ∼126 Wh kg −1 . At a relatively high discharge current density of 4 mA cm −2 , the specific capacitance was still maintained at 220 F g −1 . Furthermore, portable La 2 Te 3 asymmetric supercapacitor devices have been fabricated using an aqueous 1 M KOH electrolyte with good specific energy and specific power. Such an impressive portable asymmetric supercapacitor is a promising candidate for applications in high-performance energy storage systems. A cinnamon-like La 2 Te 3 nanostructure has been prepared by a simple chemical bath deposition (CBD) route.