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Una estrategia de diseño para la redox aniónica duradera a través de la modulación de la estructura electrónica

Wontae Lee^1,2,3, Yun Seong Byeon⁴, Kyeongkeun Kwon⁵

¹Department of Chemistry Education, Kyungpook National University, Daegu, Republic of Korea.

Advanced materials (Deerfield Beach, Fla.)

|February 6, 2026

Resumen

La fluoración estabiliza los materiales catódicos desordenados para las baterías de iones de litio (LIB) de próxima generación al suprimir la liberación de oxígeno y mejorar el rendimiento del ciclado. Este avance permite cátodos de alta capacidad y duraderos para LIB mediante la ingeniería de una funcionalidad redox aniónica estable.

Área de la Ciencia:

Ciencia de Materiales
Electroquímica
Tecnología de Baterías

Sus antecedentes:

Los materiales catódicos desordenados ofrecen potencial para las baterías de iones de litio (LIB) avanzadas.
La redox aniónica en estos materiales está limitada por la inestabilidad y la liberación de oxígeno, lo que dificulta su comercialización.
Los sistemas desordenados convencionales con exceso de Li enfrentan restricciones compositivas.

Objetivo del estudio:

Superar los problemas de inestabilidad y liberación de oxígeno en los materiales catódicos desordenados.
Desarrollar un nuevo marco para la ingeniería de cátodos duraderos y de alta capacidad para LIB.
Desbloquear la funcionalidad redox aniónica estable en las LIB de próxima generación.

Principales métodos:

Se utilizó Immm-Li₂NiO₂ como plataforma para químicas altamente litadas.
Se introdujo la fluoración para modificar la estructura electrónica y crear unidades Li-O-M-F.
Se investigó el impacto de la fluoración en el ciclado electroquímico, la liberación de oxígeno y la estabilidad estructural.

Principales resultados:

La fluoración suprimió la evolución de oxígeno a altos voltajes al disminuir la energía de la banda Li─O─Li.
La configuración Li-O-M-F mejoró la estabilidad estructural y el rendimiento del ciclado.
Se logró la formación in situ de desorden con una funcionalidad redox aniónica estable.

Conclusiones:

La fluoración es una estrategia viable para estabilizar materiales catódicos desordenados para LIB.
El marco desarrollado permite cátodos duraderos y de alta capacidad al trascender las restricciones estequiométricas.
Este enfoque ofrece un plano para diseñar materiales LIB de próxima generación con un rendimiento mejorado.

Palabras clave:

entorno cuadrupolar Li-O-M-F materiales catódicos con exceso de Li reacción redox aniónica modulación de la estructura electrónica fase desordenada formada in situ

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