High magnesium mobility in ternary spinel chalcogenides

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 in...

Full description

Saved in:
Bibliographic Details
Published in:Nature communications 2017-11, Vol.8 (1), p.1759-8, Article 1759
Main Authors: Canepa, Pieremanuele, Bo, Shou-Hang, Sai Gautam, Gopalakrishnan, Key, Baris, Richards, William D., Shi, Tan, Tian, Yaosen, Wang, Yan, Li, Juchuan, Ceder, Gerbrand
Format: Article
Language:English
Subjects:
639/301/299/891
639/4077/4079/891
Batteries
Chalcogenides
Conductors
ENERGY STORAGE
Flux density
Humanities and Social Sciences
Ionic mobility
Ions
Lithium
Magnesium
MATERIALS SCIENCE
Mobility
multidisciplinary
NMR
Nuclear engineering
Nuclear magnetic resonance
Nuclear safety
Rechargeable batteries
Scandium
Science
Science (multidisciplinary)
Selenide
Spectroscopy
Spinel
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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. Low magnesium mobility in solids represents a significant obstacle to the development of Mg intercalation batteries. Here the authors show that substantial magnesium ion mobility can be achieved in close-packed ternary selenide spinel materials.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-017-01772-1