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Electronic paddle-wheels in a solid-state electrolyte
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DOI：10.1038/s41467-023-44274-z.png)
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摘要
En 中文
Solid-state superionic conductors (SSICs) are promising alternatives to liquid electrolytes in batteries and other energy storage technologies. The rational design of SSICs and ultimately their deployment in battery technologies is hindered by the lack of a thorough understanding of their ion conduction mechanisms. In SSICs containing molecular ions, rotational dynamics couple with translational diffusion to create a paddle-wheel effect that facilitates conduction. The paddle-wheel mechanism explains many important features of molecular SSICs, but an explanation for ion conduction and anharmonic lattice dynamics in SSICs composed of monatomic ions is still needed. We predict that ion conduction in the classic SSIC AgI involves electronic paddle-wheels, rotational motion of localized electron pairs that couples to and facilitates ion diffusion. The electronic paddle-wheel mechanism creates a universal perspective for understanding ion conductivity in both monatomic and molecular SSICs that will create design principles for engineering solid-state electrolytes from the electronic level up to the macroscale. Conduction in solid-state electrolytes composed of monatomic ions is found to be analogous to the paddle-wheel mechanism in molecular solid electrolytes, facilitated by rotational motion of lone pair electrons, helping unify understanding of mechanisms.
Keyword:
HALIDE SUPERIONIC CONDUCTORS
CONDUCTIVITY
MECHANISM
DYNAMICS
ROTATION
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期刊
IF:
15.7
论文数:
9.3W
被引数:
91.2W
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