High magnesium mobility in ternary spinel chalcogenides
Author(s)Key, Baris; Shi, Tan; Tian, Yaosen; Li, Juchuan; Sai Gautam, Gopalakrishnan; Canepa, Pieremanuele; Bo, Shouhang; Richards, William D; Wang, Yan; Ceder, Gerbrand; ... Show more Show less
MetadataShow full item record
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-1at 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.
DepartmentMassachusetts Institute of Technology. Department of Materials Science and Engineering
Canepa, Pieremanuele, Shou-Hang Bo, Gopalakrishnan Sai Gautam, Baris Key, William D. Richards, Tan Shi, Yaosen Tian, Yan Wang, Juchuan Li, and Gerbrand Ceder. “High Magnesium Mobility in Ternary Spinel Chalcogenides.” Nature Communications 8, no. 1 (November 24, 2017).
Final published version