NDLI: Toward “rocking-chair type” Mg

Content Provider	Royal Society of Chemistry (RSC)
Author	Yagi, Shunsuke Oba, Fumiyasu Matsubara, Eiichiro Kumagai, Yu Doi, Takayuki Kawaguchi, Tomoya Goto, Natsumi Ichitsubo, Tetsu Okamoto, Shinya
Copyright Year	2015
Abstract	High energy-density rechargeable batteries are strongly demanded from the viewpoint of energy and environmental concern. This work is devoted to fundamental electrochemistry on a novel concept of rechargeable batteries, “rocking-chair type” Mg–Li dual-salt batteries (DSBs), where both Mg and Li cations are carrier ions. In this system, dangerous dendritic growth is drastically suppressed by co-electrodeposition of Mg and Li, and Mg–Li alloys can be used as anode materials with high electrical capacities. As a DSB cathode material that can accommodate both Mg and Li cations, we use a spinel oxide MgCo2O4, in which an eccentric insertion mechanism, the “intercalation & push-out” process, occurs. Mg insertion occurs at 2.9 V vs. Mg2+/Mg and Li insertion occurs at 3.1 V vs. Li+/Li, being consistent with ab initio calculations, and its capacity approximately amounts to 150–200 mA h g−1. In the combination of MgCo2O4 and Mg50Li50 alloys, the cell voltage during discharge is as high as about 2–3 V. The concept of rocking-chair type DSB systems provides a new strategy for future safe rechargeable batteries combining high energy/power densities.
Starting Page	10188
Ending Page	10194
Page Count	7
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	3
Issue Number	19
Journal	Journal of Materials Chemistry A
DOI	10.1039/c5ta01365h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	DSB Li Electrochemistry Anode DNA repair Cathode Spinel group
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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