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Modulación de la Microestructura e Interfaz para Potenciar la Capacidad y Estabilidad de Almacenamiento de Sodio en
Zhe Wang1, Yutian Yang1, Hang Li1
1School of Materials Science and Engineering, Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province, Central South University, Changsha, Hunan, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|February 7, 2026
Resumen
Los investigadores desarrollaron una estrategia novedosa para mejorar los ánodos de carbono duro (HC) para baterías de iones de sodio. Este enfoque mejora la capacidad de almacenamiento de sodio y la estabilidad de ciclismo, cruciales para el rendimiento de la batería.
Área de la Ciencia:
- Ciencia de Materiales
- Electroquímica
- Almacenamiento de Energía
Sus antecedentes:
- Los ánodos de carbono duro (HC) enfrentan desafíos en las baterías de iones de sodio debido a la limitada capacidad de almacenamiento de Na+ y la pobre estabilidad de ciclismo.
- Estas limitaciones están fuertemente ligadas a la microestructura y las propiedades de la interfaz del ánodo.
Objetivo del estudio:
- Desarrollar una estrategia sinérgica para modular la microestructura y la interfaz del HC a base de resina.
- Mejorar los sitios activos de almacenamiento de Na+ y la estabilidad estructural para un mejor rendimiento de la batería.
Principales métodos:
- Introducción de grupos C=O para la adsorción reversible de Na+.
- Utilización de grupos carboxilo e hidroxilo fenólico para anclar iones Zn2+, creando poros jerárquicos.
- Expansión del espaciado entre capas para mejorar la cinética de intercalación/desintercalación de Na+.
Principales resultados:
- El material optimizado ZGB-HC logró una alta capacidad de 406 mAh g-1 a 50 mA g-1.
- Demostró una estabilidad de ciclismo excepcional con más de 1000 ciclos a 1 A g-1.
- La celda completa Na3V2(PO4)3||ZGB-HC mostró una capacidad de velocidad de 96,4 mAh g-1 a 4 C y un ciclismo estable durante más de 250 ciclos a 2C.
Conclusiones:
- La estrategia desarrollada mejora eficazmente el rendimiento del ánodo de HC para baterías de iones de sodio.
- Proporciona nuevas perspectivas sobre la evolución estructural de los ánodos de HC durante el ciclismo.
- Ofrece un enfoque prometedor para el diseño de materiales avanzados de almacenamiento de energía.
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