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Un precursor dual derivado del Azul de Prusia para cátodos LFP/C de alto rendimiento

Jianwen Su^1,2, Junwen Tang¹, Shaoqiu Wang³

¹Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China.

Langmuir : the ACS journal of surfaces and colloids

|February 4, 2026

Resumen

Este estudio presenta un método novedoso que utiliza el Azul de Prusia como precursor dual para crear cátodos de fosfato de hierro y litio recubiertos de carbono (LFP/C) de alto rendimiento para baterías avanzadas de iones de litio.

Palabras clave:

baterías de iones de litio fosfato de hierro y litio cátodos Azul de Prusia precursor dual recubrimiento de carbono rendimiento electroquímico estabilidad

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Área de la Ciencia:

Ciencia de Materiales
Electroquímica
Almacenamiento de Energía

Sus antecedentes:

El fosfato de hierro y litio (LFP) olivino es un material de cátodo prometedor para baterías de iones de litio debido a sus beneficios de seguridad y ambientales.
Sin embargo, el LFP sufre de baja conductividad eléctrica y transporte lento de iones de litio, lo que limita su uso en aplicaciones de alta potencia.

Objetivo del estudio:

Desarrollar un método novedoso y eficiente para sintetizar LFP recubierto de carbono (LFP/C) con un rendimiento electroquímico mejorado.
Utilizar el Azul de Prusia (PB) como precursor dual para fuentes de hierro y carbono en un proceso de un solo paso.

Principales métodos:

Se empleó un proceso de sinterización de un solo paso utilizando Azul de Prusia (PB) como precursor para sintetizar LFP recubierto de carbono (LFP/C).
Se realizaron evaluaciones electroquímicas, incluyendo capacidad de descarga, rendimiento de velocidad y pruebas de estabilidad de ciclaje a largo plazo.

Principales resultados:

El LFP/C sintetizado exhibió una capacidad de descarga inicial de 160.3 mAh·g^-1 a 0.2C, con una excelente retención (119.1 mAh·g^-1 a 6C) y recuperación de capacidad.
Se demostró una estabilidad de ciclaje a largo plazo excepcional, con un 96.7% y 84.3% de retención de capacidad después de 500 ciclos a 1C y 5C, respectivamente.
Las mejoras en el rendimiento se atribuyen a una capa de carbono formada in situ y a una estructura altamente ordenada derivada del precursor de PB.

Conclusiones:

El Azul de Prusia sirve como un precursor dual eficaz para sintetizar materiales LFP/C de alto rendimiento.
Este enfoque ofrece una vía sencilla y eficiente para desarrollar cátodos LFP/C avanzados para baterías de iones de litio de alta potencia.