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Química de las baterías con H+ y Zn+

Wei Sun^1,2, Fei Wang¹, Singyuk Hou¹

¹Department of Chemical and Bimolecular Engineering, University of Maryland , College Park, Maryland 20740, United States.

Journal of the American Chemical Society

|July 15, 2017

Resumen

Este estudio presenta una batería acuosa de dióxido de zinc/manganeso (Zn/MnO2) de alta reversibilidad. El nuevo cátodo de dióxido de manganeso funciona a través de un mecanismo de inserción de iones consecuente, mejorando el rendimiento y la estabilidad de la batería.

Área de la Ciencia:

La electroquímica
Ciencias de los materiales
Energía sostenible

Sus antecedentes:

Las baterías acuosas de Zn/MnO2 son atractivas debido a sus componentes seguros, abundantes y sostenibles.
El mecanismo de reacción preciso de los cátodos de MnO2 en estas baterías aún se está investigando.

Objetivo del estudio:

Diseñar e investigar una batería acuosa de Zn/MnO2 altamente reversible.
Para aclarar el mecanismo de reacción del cátodo MnO2.

Principales métodos:

Fabricación de un cátodo de MnO2 sin aglutinante mediante electrodeposición in situ en papel de fibra de carbono.
Análisis electroquímico (por ejemplo, ciclos, perfiles de carga-descarga).
Análisis estructural para comprender las vías de reacción.

Principales resultados:

Se ha demostrado una batería acuosa de Zn/MnO2 altamente reversible.
Se ha identificado un proceso de inserción/extracción consecuente de H+ y Zn2+ en el cátodo de MnO2.
Alcanzó una alta estabilidad de ciclismo.

Conclusiones:

El cátodo MnO2 desarrollado exhibe un nuevo mecanismo de reacción de inserción de iones consecuente.
Este trabajo representa el primer informe de baterías acuosas recargables con tal mecanismo.
Los hallazgos contribuyen al avance de las tecnologías de baterías sostenibles.

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