Two-Dimensional V2O5 Inverse Opal: Fabrication and Electrochromic Application

• DOI: 10.3390/ma15082904
• Publication Date: 2022-04-18T08:21:28Z
• Authors: Hua Li; Zijuan Tang; Yuwei Liu; Jacques Robichaud; Jian Liang; Weihui Jiang; Yahia Djaoued
• Keywords: vanadium oxide; two-dimensional inverse opal; ‘dynamic hard template’ strategy; electrochromic properties; 01 natural sciences; Article; 0104 chemical sciences

The open-layered structure of Vanadium pentoxide (V2O5) has triggered significant interest in exploring its energy-related application as lithium (Li) intercalation cathode material. Various methods are extensively studied to improve the Li diffusion using thin films or nanoarchitecture. In this work, high-quality two-dimensional (2D) inverse opal α-V2O5 were synthesized via a modified 'dynamic hard template' infiltration strategy sacrificial polystyrene spheres (PS, diameter 530 nm) photonic crystal template. new material exhibited an excellent porous array with featured structural colors large area. electrochromic behavior was explored by combining bandgap and electrochemical characterization. On one hand, intercalation/deintercalation Li+ played important role (Eg), thereafter on visible range transmittance through changing film's stoichiometry valence vanadium ions. other asymmetry lattice due disordered distribution within V2O5 interlayer and/or formation irreversible phase explained change voltage.