Our Energy Storage Solutions
Discover our range of innovative energy storage products designed to meet diverse needs and applications.
- All
- Energy Cabinet
- Communication site
- Outdoor site
Dynamic behaviour of viologen-activated nanostructured TiO
We can now estimate de evolution of the redox capacitance by subtracting the capacitances of bare and viologen-activated TiO 2, Fig. 3.Although this result has to be taken with caution because of possible displacements of the energy levels of TiO 2 related to the absorption of the viologen, the expected bell shape predicted in Eq.
Isomerization-induced fluorescence enhancement of two new viologen …
It has been known for a long time that MV 2+ is reduced to MV˙ + in alkaline aqueous and alcoholic solutions to show color. 7 To prove that the color in organic solvents arises from the viologen radicals of Vio1˙ + and Vio2˙ +, EPR tests were performed.Taking Vio1 2+ as an example, the colorless Vio1 2+ aqueous solution is EPR …
Viologen‐Immobilized 2D Polymer Film Enabling Highly Efficient Electrochromic Device for …
molecules (viologen and its derivatives), [] and conducting polymers (polypyrrole, polythiophene, and polyaniline). [] Typically, WO 3 has been widely investigated as a known inorganic EC material due to its excellent stability, fast switching speed, high ...
Viologen‐based host–guest supramolecule with tunable …
Recently, the macrocycles strategy, where viologen guest molecules are incorporated into macrocycle hosts to realize single viologen molecule (SVM) …
Viologen-Based Electrochromic Materials: From Small Molecules, …
For chemical attachment onto the TiO 2 surface which bears OH groups, the employed viologen molecules are usually functionalized with at least one phosphonic acid group (-P(=O)(OH) 2) linked to the viologen …
Viologen-based electrochromic materials and devices
Considerable interest is raised by organic materials owing to their exceptional performance in electronic and optoelectronic applications. Among these, electrochromic materials (EC) that can be switched between a distinct color and a bleached state exhibiting high contrast, multicolor and improved long-term
Single-Molecule Conductance of Viologen-Cucurbit [8]uril Host …
The local molecular environment is a critical factor which should be taken into account when measuring single-molecule electrical properties in condensed media or in the design of future molecular electronic or single molecule sensing devices. Supramolecular interactions can be used to control the l …
Rational design of viologen redox additives for high-performance supercapacitors …
The CV curve of the capacitor with redox electrolytes π-EV also deviates from rectangular due to Faradic reactions (Fig. S15). As shown in Fig. 5d and Fig. S16, the capacitor with π-EV displays a specific capacity of 59.1 mA h g−1 at 1.5 A g−1, and the
Viologen‐based host–guest supramolecule with tunable …
Viologen, as a type of strong electron acceptor, is prone to undergo electron transfer (ET) and change color under external stimuli. However, due to the easy aggregation of viologen molecules, they usually suffer from poor fluorescence emission in the condensed ...
Reversible intercalation of methyl viologen as a dicationic charge …
Herein, we report the reversible topotactic (de)intercalation chemistry of a molecular ion, methyl viologen, (1,1′-dimethyl-4,4′-bipyridinium, hereafter denoted as MV 2+) inside a highly ...
Bipolar-Type Organic Electrode Material Composed of a Viologen–Naphthalene Diimide–Viologen …
Redox-active organic molecules (ROMs) play a crucial role as electrode materials in the development of future energy storage devices. In this study, we synthesized a bipolar-type ROM, NDI-2Vi, that comprises a triad of an n-type naphthalene diimide (NDI) unit and two p-type viologen (Vi) units, which can reversibly insert/extract the Li cations …
Viologen/Bromide Dual-Redox Electrochemical Capacitor with Two-Electron Reduction of Viologen…
In this work, we report a novel dual-redox electrochemical capacitor (EC) using a modified viologen (V) as anolyte and bromide (Br) as catholyte. In general, modified viologens are dications. When they are used as anolyte in aqueous dual-redox ECs, only one-electron reduction reaction can occur, because most divalent and monovalent …
Viologen-based electrochromic materials and devices
Ionic materials, in particular, have received persistent attention owing to their tunable optical and electronic properties. 4,4′-Bipyridinium salts, commonly called viologens (V 2+), are a well …
Boosting Photocatalytic Metal-Free Hydrogen Production of Viologen …
In the pursuit of efficient and sustainable methods for photocatalytic hydrogen generation from water, covalent organic frameworks (COFs) have risen to prominence. Serving as a crucial link between organic flexibility and synthetic tunability, COFs present themselves as highly promising candidates for visible light-driven hydrogen …
Multi-electron redox asymmetric supercapacitors based on quinone-coupled viologen …
All-pseudocapacitive asymmetric supercapacitors composed of quinone-functionalized viologen derivatives as positive and titanium carbide (MXene) as negative electrodes exhibited expanded voltage window of 1.5 V in 3 M H 2 SO 4, ultra-high rate electrochemical behavior (up to 5,000 mV/s), good energy density (~20 Wh/kg), and long …
Electrochromism of Viologen/Polymer Composite: From Gel to …
As more viologen molecules are involved in electrochromism, the color change is more obvious for visual observation. ... Yasuda Y. Dielectric Properties of Oil-Impregnated all Polypropylene Film, Power Capacitor Insulation System. IEEE Trans. Electr. Insul. [] [] ...
Structure-property relationships in redox-gated single molecule junctions--a comparison of pyrrolo-tetrathiafulvalene and viologen …
We demonstrate that the electrical "switching" behavior of single molecules connected between two electrode contacts can be controlled by altering their structure and electrochemical characteristics. The electrical properties of gold|molecule|gold single molecule junctions incorporating HS(CH2)6-X-( …
Understanding the Operating Mechanism of Aqueous …
The extension of the voltage window allows for full reduction of the viologen molecules during charge and a consequent increase in the specific discharge energy delivered by the cell. Investigation of the mechanism …
Electron-Transfer Reactions of Ruthenium Trisbipyridyl-Viologen Donor-Acceptor Molecules…
Linkage Length Dependence of Intramolecular Photoinduced Electron Transfer Reactions in Aromatic Donor−Viologen Acceptor Molecules Linked by Polymethylene Bridges. The Journal of Physical Chemistry B 1998, 102 (42), 8209-8215.
Rational design of viologen redox additives for high-performance …
Introducing redox species into the electrolytes of traditional electric double layer capacitors (EDLCs) is an efficient strategy to enhance their energy density owing to Faradic reactions. However, few studies have elucidated the effect of the molecular …
Size-controlled one-pot synthesis of viologen nanoparticles via a microwave …
a One-pot synthesis of viologen nanoparticles by microwave heating.b 1 H NMR spectra obtained for the reaction mixture of 4,4′-bipyridine, benzyl bromide, and ethyl bromide at 80 C for 10 min (i ...
Single-Molecule Conductance of Viologen–Cucurbit[8]uril …
The local molecular environment is a critical factor which should be taken into account when measuring single-molecule electrical properties in condensed media or in the design of future molecular electronic or single molecule sensing devices. Supramolecular interactions can be used to control the local environment in molecular …
Aniline-substituted viologen-containing redox-active electrolytes …
Highlights. •. We synthesized various viologens substituted with aniline groups. •. Electrochemical capacitors were fabricated using an electrolyte containing …
Recent Advances in Molecular Engineering for Viologen-Based …
Viologens, with their unique redox-active properties, have garnered increasing attention in the development of electrochromic devices. This review focuses on key strategies in …
Redox-Enhanced Electrochemical Capacitors: Status, …
Redox-enhanced electrochemical capacitors (redox ECs) are a class of augmented electric double-layer capacitors utilizing reversible redox reactions of soluble redox couples in the electrolyte. These systems offer increased energy density, efficient power delivery, and simple construction. In this Perspective, we provide an overview of the emerging field of …