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Regulación de la estructura intrínseca en el carbono duro basado en antracita para el almacenamiento de iones de

Rui Li¹, Chunbo Su¹, Wang Xu¹

¹College of Materials and Chemistry & Chemical Engineering (College of Lithium Resources and Lithium Battery Industry), Chengdu University of Technology, Chengdu, 610059, China.

|August 21, 2025

Resumen

Una estrategia innovadora de acetileno mejora los ánodos de carbono duro para las baterías de iones de sodio, aumentando la eficiencia y la capacidad coulombicas iniciales. Este método mejora el rendimiento para mejores soluciones de almacenamiento de energía.

Área de la Ciencia:

Ciencias de los materiales
La electroquímica
Almacenamiento de energía

Sus antecedentes:

El carbono duro (HC) es un material de ánodo clave para las baterías de iones de sodio (SIB) debido a su costo y capacidad.
La baja eficiencia coulombina inicial (ICE) sigue siendo un desafío importante para los ánodos HC.

Objetivo del estudio:

Desarrollar una estrategia mediada por acetileno para adaptar la estructura de carbono duro y el contenido de heteroátomos.
Mejorar el rendimiento electroquímico y el ICE del carbono duro derivado de la antracita.

Principales métodos:

Utilizando acetileno durante la pirólisis para mediar reacciones con heteroátomos (O, N, S) en la antracita.
La conversión de los poros abiertos a los cerrados a través de la deposición de radicales de carbono durante la pirólisis.
Caracterizar las propiedades estructurales y electroquímicas del carbono duro modificado.

Principales resultados:

El HC optimizado logró una alta capacidad específica de 220 mAh g-1 a 0.3C con un 88% de ICE.
Se observó una estabilidad excepcional en ciclos, conservando 210 mAh g−1 a 0.3C después de 500 ciclos.
El enfoque mediado por radicales redujo efectivamente el consumo irreversible de Na+ y aumentó la capacidad.

Conclusiones:

La estrategia mediada por acetileno ofrece una ruta universal para el diseño de ánodos de carbono duro de alto rendimiento.
Este método supera con éxito las limitaciones típicas de ICE de los materiales de carbono duro.
El carbono duro adaptado demuestra un potencial significativo para aplicaciones avanzadas de baterías de iones de sodio.

Palabras clave:

Antracita y sus derivados el carbono duro eficiencia coulombina inicial batería de iones de sodio regulación estructural

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