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High magnesium mobility in ternary spinel chalcogenides.

ABSTRACT: Magnesium batteries appear a viable alternative to overcome the safety and energy density limitations faced by current lithium-ion technology. The development of a competitive magnesium battery is plagued by the existing notion of poor magnesium mobility in solids. Here we demonstrate by using ab initio calculations, nuclear magnetic resonance, and impedance spectroscopy measurements that substantial magnesium ion mobility can indeed be achieved in close-packed frameworks (~ 0.01-0.1 mS cm-1 at 298 K), specifically in the magnesium scandium selenide spinel. Our theoretical predictions also indicate that high magnesium ion mobility is possible in other chalcogenide spinels, opening the door for the realization of other magnesium solid ionic conductors and the eventual development of an all-solid-state magnesium battery.

SUBMITTER: Canepa P

PROVIDER: S-EPMC5700915 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature

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High magnesium mobility in ternary spinel chalcogenides.

Canepa Pieremanuele P Bo Shou-Hang SH Sai Gautam Gopalakrishnan G Key Baris B Richards William D WD Shi Tan T Tian Yaosen Y Wang Yan Y Li Juchuan J Ceder Gerbrand G

Nature communications 20171124 1

Magnesium batteries appear a viable alternative to overcome the safety and energy density limitations faced by current lithium-ion technology. The development of a competitive magnesium battery is plagued by the existing notion of poor magnesium mobility in solids. Here we demonstrate by using ab initio calculations, nuclear magnetic resonance, and impedance spectroscopy measurements that substantial magnesium ion mobility can indeed be achieved in close-packed frameworks (~ 0.01-0.1 mS cm<sup>- ...[more]

PMID: 29170372

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