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Hidrogenación y deshidrogenación reversible de cetonas para baterías de flujo redox orgánico acuoso
Ruozhu Feng1, Xin Zhang2, Vijayakumar Murugesan1
1Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, WA 99354, USA.
Science (New York, N.Y.)
|May 21, 2021
Resumen
Los investigadores desarrollaron nuevas moléculas orgánicas para baterías de flujo redox acuoso. Estos materiales a base de fluorenona permiten un almacenamiento de energía eficiente y estable utilizando hidrogenación y deshidrogenación de cetonas reversibles sin catalizadores.
Área de la Ciencia:
- La electroquímica
- Ciencias de los materiales
- Energía sostenible
Sus antecedentes:
- Las baterías de flujo redox acuoso (RFB) son prometedoras para el almacenamiento de energía a gran escala debido a su compatibilidad con el medio ambiente, la capacidad de ajuste y la seguridad.
- El desarrollo actual está limitado por una selección limitada de materiales activos orgánicos solubles en agua con una reversibilidad redox adecuada dentro de la ventana de estabilidad del agua.
Objetivo del estudio:
- Explorar la ingeniería molecular de derivados de fluorenona para nuevas aplicaciones de baterías de flujo redox acuoso.
- Demostrar la hidrogenación y deshidrogenación reversibles de cetonas para el almacenamiento de energía sin catalizadores.
Principales métodos:
- La ingeniería molecular de la fluorenona para crear nuevos materiales activos orgánicos.
- Caracterización electroquímica de los derivados de fluorenona en electrolitos acuosos.
- Pruebas de ciclo a largo plazo de baterías de flujo que utilizan estos nuevos anólitos.
Principales resultados:
- Los derivados de la fluorenona permiten una electrooxidación eficiente del alcohol para la hidrogenación/deshidrogenación reversible de las cetonas a temperatura ambiente.
- Las baterías de flujo que utilizan estos materiales exhiben un rendimiento de ciclo estable a largo plazo.
- El sistema funciona eficazmente a temperaturas ambientales y ligeramente elevadas en un entorno no exigente.
Conclusiones:
- Este trabajo amplía el rango de parejas redox orgánicas para RFB acuosas al incluir la conversión reversible de cetona a alcohol.
- Los hallazgos sugieren el potencial para descubrir otros candidatos de pareja redox orgánica atípica para aplicaciones de almacenamiento de energía.
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