Video Experimental Relacionado
Updated: May 28, 2026
09:04
Fabrication of VB2/Air Cells for Electrochemical Testing
Published on: August 5, 2013
Electroquímica acuosa de poli (vinilantraquinona) para materiales anodicos activos en baterías de polímero / aire de
Wonsung Choi1, Daisuke Harada, Kenichi Oyaizu
1Department of Applied Chemistry, Waseda University, Tokyo 169-8555, Japan.
Journal of the American Chemical Society
|October 21, 2011
Resumen
Poly ((2-vinylanthraquinone) demuestra actividad redox reversible en electrolitos acuosos, funcionando como un ánodo orgánico estable para baterías de aire. Este material logra más de 500 ciclos con capacidad consistente, mostrando su potencial en aplicaciones de almacenamiento de energía.
Área de la Ciencia:
- La electroquímica es electroquímica.
- Ciencia de los materiales Ciencia de los materiales.
- La ciencia de los polímeros es la ciencia de los polímeros.
Sus antecedentes:
- Se está explorando el uso de poli ((2-vinilantraquinona) para aplicaciones electroquímicas.
- Comprender el comportamiento redox de los colgantes de antraquinona en electrolitos acuosos es crucial para el desarrollo de baterías.
Objetivo del estudio:
- Investigar las propiedades electroquímicas de la poli ((2-vinilantraquinona) como material de ánodo en electrolitos acuosos.
- Para evaluar la estabilidad y el rendimiento de la capa de polímero en aplicaciones de baterías de aire.
Principales métodos:
- Caracterización electroquímica de las capas de poli ((2-vinilantraquinona) en los colectores de corriente en el electrolito acuoso.
- Fabricación y ensayo de una célula de batería de aire utilizando el polímero como ánodo orgánico y MnO(2) / C como cátodo.
Principales resultados:
- La capa de polímero exhibió reacciones de electrodo reversibles a -0.82 V frente a Ag/AgCl con ciclos de carga/descarga repetibles.
- La capacidad redox indicó la actividad completa de los colgantes de antraquinona y la electroneutralización efectiva por cationes electrolitos.
- La capa de polímero se mantuvo estable en el colector de corriente sin exfoliación o disolución.
- La célula de prueba de la batería de aire demostró una tensión de descarga de 0,63 V y se mantuvo durante más de 500 ciclos sin pérdida de capacidad.
Conclusiones:
- Poly ((2-vinylanthraquinone) es un material anodo-activo orgánico viable para baterías de aire acuoso.
- La actividad electroquímica del polímero en un medio no disolvente proporciona información sobre el comportamiento del colgante de antraquinona.
- El material ofrece una excelente estabilidad en ciclos, destacando su potencial para dispositivos prácticos de almacenamiento de energía.
Más Videos Relacionados
07:55Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering
Published on: April 17, 2018
09:49A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery
Published on: February 13, 2017
Videos de Conceptos Relacionados
03:12Batteries and Fuel Cells
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
02:47Voltaic/Galvanic Cells
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
03:00Electrolysis
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
01:28Electrochemical Cells
Electrochemical cells are systems that convert chemical energy into electrical energy or use electrical energy to drive chemical reactions. They consist of two electrodes in contact with an electrolyte, where redox reactions enable electron transfer. Most electrochemical cells include two half-cells connected by an external wire for electron flow and a salt bridge for ion flow. The salt bridge contains an electrolyte solution and maintains charge neutrality by allowing ions—not electrons—to...
01:30Processes at Electrodes
The electrode interacts with ions in the electrolyte solution at its interface. The rate of oxidation and reduction depends on the speed at which electrons can transfer through this interface. As ions attach to or leave the electrode surface, the electrode acquires a charge, and an electrical potential forms across the interface, making the process more difficult to reach equilibrium. The charge on the electrode affects the local ion concentrations in the solution, though thermal motion...
01:17Oxidation of Phenols to Quinones
In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox property is crucial in...
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox property is crucial in...