NDLI: A high capacity thiospinel cathode for Mg batteries

Content Provider	Royal Society of Chemistry (RSC)
Author	Rong, Ziqin Liu, Miao Ceder, Gerbrand Persson, Kristin A. Nazar, Linda F. Bonnick, Patrick Sun, Xiaoqi Duffort, Victor
Copyright Year	2016
Abstract	Magnesium batteries are energy storage systems that potentially offer high energy density owing to their ability to employ magnesium metal as a negative electrode. Their development, however, has been thwarted by a paucity of functional positive electrode materials after the seminal discovery of the Mo6S8 Chevrel phase over 15 years ago. Herein, we report the second such material – a thiospinel – and demonstrate fully reversible Mg2+ electrochemical cycling vs. a Mg anode, which is complemented by diffraction and first principles calculations. The capacity approaches 80% of the theoretical value at a practical rate (C/5) at 60 °C, and yields a specific energy of 230 Wh kg−1, twice that of the Chevrel benchmark. Our results emphasize the advantage in employing “soft” anions to achieve practical divalent cation mobility.
Starting Page	2273
Ending Page	2277
Page Count	5
File Format	HTM / HTML PDF
ISSN	17545692
Volume Number	9
Issue Number	7
Journal	Energy & Environmental Science
DOI	10.1039/c6ee00724d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Magnesium Energy density Electrode Octahedral cluster Thiospinel group Electrochemistry Anode Diffraction Ion
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Renewable Energy, Sustainability and the Environment Nuclear Energy and Engineering

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