Phase transformation in tungsten oxide nanoplates as a function of post-annealing temperature and its electrochemical influence on energy storage.

ABSTRACT: The morphology and crystal structure of electrode materials have an enormous impact on their electrochemical properties for employment in supercapacitors for various applications. In this study, the transformations of the crystal structure of WO₃·H₂O nanoplates were conducted by post-annealing at 200 °C and 400 °C. The morphological and structural evolution of the electrodes was studied via FEG-SEM, HRTEM, FTIR, XRD, and Raman spectroscopy. The phase transition and enhanced degree of crystallinity were observed with increasing temperature. The orthorhombic structures of the hydrate WO₃·H₂O (W80), the mixed-phase with mesoporous structure (W200), and finally the monoclinic phase of WO₃ structures (W400) were achieved at annealing

SUBMITTER: Gupta SP 

PROVIDER: S-EPMC9416815 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature