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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Real-Time Monitoring of Electrochromic Memory Loss of Layered alpha-MoO3 Nanoplates

Full text
Author(s):
Felix, A. A. [1] ; Barbosa, M. S. [1] ; Bueno, P. R. [1] ; Orlandi, M. O. [1]
Total Authors: 4
Affiliation:
[1] Sao Paulo State Univ UNESP, Dept Engn Phys & Math, Chem Inst, Araraquara, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Journal of the Electrochemical Society; v. 167, n. 16 DEC 1 2020.
Web of Science Citations: 0
Abstract

Combined in situ cyclic electrochemical and UV-vis spectroscopic methods were employed to monitor the memory loss of electrochromic properties of layered alpha-MoO3 nanoplates. The time-resolved characteristics of this in situ study allowed for the quantification of changes in charge and optical densities as a function of electrochemical potential over time. Lithium ions trapped in the crystalline lattice of alpha-MoO3 during the bleaching process, along with the irreversible reduction of Mo6+ to Mo5+, govern the memory loss responsible for the degradation of the electrochromic properties. These experiments demonstrated the existence of a saturation limit of the structural charge insertion that effectively contributes to the electrochromic performance of alpha-MoO3 nanoplates. The study improves the understanding of electrochromic memory loss and the degradation mechanism and suggests a two-step electrochemical reaction that controls the electrochromic activity of the alpha-MoO3 phase. (AU)

FAPESP's process: 19/06568-5 - In-operando Study of Nanoscale Proprieties of Molecular Switching Devices
Grantee:Martin Schwellberger Barbosa
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 17/26219-0 - Study of Single Element Chemical Sensor Devices based on Semiconducting Metal Oxide Materials
Grantee:Marcelo Ornaghi Orlandi
Support Opportunities: Regular Research Grants
FAPESP's process: 17/24839-0 - Nanoelectronics and nanoscale electrochemistry: fundaments and applications
Grantee:Paulo Roberto Bueno
Support Opportunities: Research Projects - Thematic Grants