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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
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Cátodo líquido de polioduro iónico de alta conductividad eléctrica para baterías de doble chapa de zinc y yodo de
Hongyang Zhao1, Dandan Yin1, Yanyang Qin1
1School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, National Innovation Platform (Center) for Industry-Education Integration of Energy Storage Technology, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, P. R. China.
Journal of the American Chemical Society
|February 29, 2024
Resumen
Los investigadores desarrollaron un nuevo líquido iónico poliyoduro hidrofóbico para baterías de zinc yodo. Este material mejora la conductividad y reduce la solubilidad, lo que permite un rendimiento estable de la batería de alta capacidad y aplicaciones de microbaterías flexibles.
Área de la Ciencia:
- La electroquímica
- Ciencias de los materiales
- Almacenamiento de energía
Sus antecedentes:
- Las baterías de zinc-yodo ofrecen alta densidad de energía y baja toxicidad.
- Los desafíos incluyen baja conductividad de yodo y alta solubilidad de poliyoduro, capacidad limitante y estabilidad.
Objetivo del estudio:
- Desarrollar una batería de zinc-yodo estable y de alto rendimiento utilizando un nuevo material de cátodo.
- Superar las limitaciones de los sistemas tradicionales de zinc y yodo mediante el aumento de la conductividad y la reducción del transporte de poliyoduro.
Principales métodos:
- Propuso un líquido iónico poliyoduro hidrófobo como material de cátodo.
- Empleó ingeniería molecular para optimizar la estructura química del líquido iónico.
- Celdas de zinc y yodo de doble recubrimiento y micro baterías flexibles.
Principales resultados:
- Logró un aumento de 4 órdenes de magnitud en la conductividad eléctrica intrínseca.
- Se demostró una reducción significativa de la solubilidad de poliyoduro, suprimiendo el efecto lanzadera.
- Alcanzó una capacidad de área de 5.04 mAh cm-2, con funcionamiento estable a 3.12 mAh cm-2 durante más de 990 horas.
- Se mostró el ciclo estable en micro baterías flexibles con un modelo de conmutación de polaridad.
Conclusiones:
- El líquido iónico poliyoduro hidrofóbico activa eficazmente los procesos redox de yodo en las baterías de zinc y yodo.
- Este enfoque mejora significativamente la estabilidad, la capacidad y la longevidad de la batería.
- La tecnología desarrollada es adecuada para aplicaciones de microbaterías flexibles.
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