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Copolímeros de ladderphane para el almacenamiento capacitivo de energía a alta temperatura

Jie Chen1, Yao Zhou2, Xingyi Huang3

  • 1Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Department of Polymer Science and Engineering, Frontiers Science Center for Transformative Molecules, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, China.

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|March 1, 2023
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Resumen

Los nuevos copolímeros de ladderphane ofrecen un rendimiento superior para el almacenamiento de energía capacitiva a alta temperatura. Estos materiales exhiben una conducción eléctrica significativamente más baja y una mayor conductividad térmica, superando los principales desafíos en el desarrollo de polímeros dieléctricos.

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Área de la Ciencia:

  • Ciencias de los materiales
  • Química de los polímeros
  • Almacenamiento de energía

Sus antecedentes:

  • Los polímeros dieléctricos para el almacenamiento de energía capacitiva a alta temperatura requieren una baja conducción eléctrica y una alta conductividad térmica.
  • Lograr ambas propiedades simultáneamente es un desafío significativo para los materiales poliméricos actuales.

Objetivo del estudio:

  • Desarrollar nuevos polímeros dieléctricos con propiedades mejoradas para el almacenamiento de energía capacitiva a alta temperatura.
  • Investigar el rendimiento de los copolímeros de ladderphane en aplicaciones exigentes de almacenamiento de energía.

Principales métodos:

  • Síntesis de copolímeros de ladderfano.
  • Caracterización de las propiedades eléctricas y térmicas a temperaturas elevadas y campos eléctricos elevados.
  • Evaluación de la densidad de energía y la eficiencia carga-descarga en los condensadores.

Principales resultados:

  • Los copolímeros de ladderphane demostraron una conductividad eléctrica inferior en un orden de magnitud en comparación con los polímeros existentes a altos campos eléctricos y temperaturas.
  • Logró una densidad de energía descargada de 5,34 J cm-3 con una eficiencia de carga-descarga del 90% a 200 °C.
  • Se muestra una conductividad térmica intrínseca a través del plano de 1,96 ± 0,06 W m-1 K-1 debido al autoensamblaje a través del apilamiento π-π.
  • Mostró una excelente estabilidad cíclica y capacidad de auto-reparación en temperaturas elevadas.

Conclusiones:

  • Los copolímeros de ladderphane presentan una solución prometedora para condensadores de polímero de alta densidad de energía que funcionan en condiciones extremas.
  • La combinación única de baja conductividad eléctrica y alta conductividad térmica en estos copolímeros supera las limitaciones críticas en los materiales dieléctricos actuales.
  • El mecanismo de autoensamblaje y las propiedades de autocuración mejoran aún más su potencial para aplicaciones avanzadas de almacenamiento de energía.