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Superionic Conduction in One-Dimensional Nanostructures
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DOI：10.1021/acsnano.2c03732.png)
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Abstract
En 中文
Nanostructuring has become a powerful tool for tuning the electronic properties of materials and enhancing transport. As an example of relevance to next-generation battery technologies, nanocrystals have shown promise for realizing fast-ion conduction in solids; however, dissipationless ion transport over extended length scales is hindered by lossy interfaces formed between nanocrystals in a solid. Here we address this challenge by exploiting one-dimensional nanostructures for ion transport. Superionic conduction, with a record-high ionic conductivity of similar to 4 S/cm at 150 degrees C, is demonstrated in solid electrolytes fabricated from nanowires of the earth-abundant solid copper selenide. This quasi-one-dimensional ionic conductivity is similar to 5x higher than that in bulk cuprous selenide. Nanoscale dimensions in the radial direction lower ion-hopping barriers, while mesoscopically long, interface-free transport paths are available for ion transport in the axial direction. One-dimensional nanostructures can exceptionally boost solid-state devices that rely on ion transport.
Keywords:
solid electrolyte
nanowire
nanocrystal
ion transport
phase transition
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16
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2.7W
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25.6W
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