Topic
Electrochromism
About: Electrochromism is a research topic. Over the lifetime, 13097 publications have been published within this topic receiving 294637 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, a rationalization of experiments based on first-principles calculations of optical and electrical properties of oxygen-deficient (reduced) Tungsten trioxide (WO3) was proposed.
Abstract: Tungsten trioxide (WO3) is a paradigmatic electrochromic material, whose peculiar optical properties in the presence of oxygen vacancies or intercalated alkali atoms have been observed and investigated for a long time. In this paper we propose a rationalization of experiments based on first-principles calculations of optical and electrical properties of oxygen-deficient (reduced) WO3. Our approach is based on a parameter-free dielectric-dependent hybrid density functional methodology, used in combination with the charge transition levels formalism, for studying excitation mechanisms in the presence of defects. Our results indicate that oxygen vacancies lead to a different physics in γ-monoclinic WO3, depending on the orientation of the W–O–W chain where the vacancy is created, thus evidencing strong anisotropic effects rooted in the peculiar structural properties of the original nondefective monoclinic cell. Different types of oxygen vacancies can hence be classified on the basis of the calculated ground ...
74 citations
TL;DR: In this article, the authors used X-ray photoelectron spectroscopy, scanning electron microscopy, cyclic voltammetry, optical transmittance studies and CIE system of colorimetric analysis.
74 citations
TL;DR: In this paper, Li + -intercalation properties of orthorhombic V 2 O 5 have been explored in two voltage ranges: 0.4 to −1.1 V and 0.6 V versus Ag/Ag +, respectively.
74 citations
Patent•
30 Sep 1982TL;DR: In this article, the authors describe pseudocapacitance, "kinetic reversibility" (passage of approximately equal and substantial charge or discharge currents at about the same rate), "coulombic reversibiiity", and "quantity of coulombs in the charging and discharging of the device".
Abstract: This invention relates to novel type electrochemical devices such as capacitors or batteries, among other devices, which have high capacitance or power to volume or weight ratios, or which have other valuable characteristics, and which are characterized by the practical use of one or more phenomena, including pseudocapacitance, "kinetic reversibility" (passage of approximately equal and substantial charge or discharge currents at about the same rate), "coulombic reversibiiity" (passage of substantially equal numbers of coulombs in the charging and discharging of the device), distinguishable energy states of electrodeposited species on surfaces, creation of surface layers, electrochromic effects, negative differential resistance, and frequency multiplying effects which occur during, or as a result of, the formation or modification of an electrodeposited layer or layers on, or separation of charges in double layers in, one or more electrodes and/or as a result of the reaction(s) occurring between electrode and electrolyte.
74 citations
TL;DR: In this article, a highly porous cobalt oxide thin film was prepared on ITO glass by a facile chemical bath deposition (CBD) method, which has an intercrossing net-like morphology.
74 citations