Temperature dependent surface morphological modifications of hexagonal WO3 thin films for high performance supercapacitor application

• DOI: 10.1016/j.electacta.2016.12.066
• Publication Date: 2016-12-10T22:47:36Z
• Authors: Pragati A. Shinde; Abhishek C. Lokhande; Nilesh R. Chodankar; Amar M. Patil; Jin H. Kim; Chandrakant D. Lo...
• Keywords: 01 natural sciences; 7. Clean energy; 0104 chemical sciences

Abstract In present article, temperature dependent surface morphological modification and its subsequent influence on electrochemical performance of hexagonal WO3 (h-WO3) thin films has been investigated. The nanostructured h-WO3 films are synthesized on carbon cloth substrate using simple hydrothermal method. It is observed that h-WO3 thin films prepared at temperature of 413, 433 and 453 K display nanogranule-like, nanoplate-like and nanorod-like suface morphology. The X-ray diffraction study discloses the prominent orientation along (001) and (200) planes which reveals the preferential growth direction of h-WO3 along c and a-axis, respectively. The h-WO3 film prepared at 453 K shows good surface area, pore volume and uniform pore size distribution. The electrochemical measurements exhibit high specific capacitance of 694 F g−1, energy density of 25 Wh Kg−1 and long term cycling performance (87 % capacitance retention after 2,000 cycles) for h-WO3 thin film. The results indicate that h-WO3 nanorods could be a promising electrode material for high performance energy storage devices.