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Li10SnP2S12: un conductor superiónico de litio asequible.

Philipp Bron¹, Sebastian Johansson, Klaus Zick

¹Fachbereich Chemie und Wissenschaftliches Zentrum für Materialwissenschaften (WZMW), Philipps-Universität Marburg , Hans-Meerwein-Straße, 35043 Marburg, Germany.

Journal of the American Chemical Society

|October 2, 2013

Resumen

Los investigadores sintetizaron un nuevo conductor superiónico, el sulfuro de fósforo de litio y estaño (Li10SnP2S12), con alta conductividad iónica. Este material ofrece una alternativa rentable a las tecnologías existentes para aplicaciones avanzadas de almacenamiento de energía.

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Área de la Ciencia:

Ciencia de los materiales Ciencia de los materiales.
Química del estado sólido.
La electroquímica es electroquímica.

Sus antecedentes:

Los conductores superiónicos son cruciales para las tecnologías avanzadas de baterías.
El sulfuro de fósforo de litio y germanio (Li10GeP2S12) exhibe una conductividad iónica récord, pero depende del costoso germanio.
Se necesitan conductores superiónicos rentables con un rendimiento comparable.

Objetivo del estudio:

Para sintetizar y caracterizar un nuevo conductor superiónico de tiostanato.
Para evaluar la conductividad iónica del nuevo material.
Evaluar el potencial de reducción de costos mediante la sustitución del germanio por el estaño.

Principales métodos:

Síntesis de reacción en estado sólido utilizando sulfuro de litio (Li2S), pentasulfuro de fósforo (P2S5) y tiostanato de litio (Li4[SnS4]).
Espectroscopia de impedancia electroquímica para medir la conductividad iónica.
Análisis estructural y de composición (detalles no proporcionados en el resumen).

Principales resultados:

Síntesis exitosa de Li10SnP2S12, un análogo de tiostanato del Li10GeP2S12.
Se logra una alta conductividad iónica: 7 mS/cm (grano) y 4 mS/cm (total) a 27 °C.
El material a base de estaño ofrece una reducción de costos potencial de aproximadamente 3 veces en comparación con el germanio.

Conclusiones:

Li10SnP2S12 es un nuevo conductor superiónico prometedor con alta conductividad iónica.
El material a base de estaño muestra un rendimiento comparable al de Li10GeP2S12.
Este descubrimiento allana el camino para electrolitos de estado sólido más asequibles y de alto rendimiento.