Jump to main content
Jump to site search

Issue 19, 2015
Previous Article Next Article

Toward “rocking-chair type” Mg–Li dual-salt batteries

Author affiliations

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.

Graphical abstract: Toward “rocking-chair type” Mg–Li dual-salt batteries

Back to tab navigation

Supplementary files

Publication details

The article was received on 20 Feb 2015, accepted on 07 Apr 2015 and first published on 07 Apr 2015


Article type: Communication
DOI: 10.1039/C5TA01365H
Author version available: Download Author version (PDF)
Citation: J. Mater. Chem. A, 2015,3, 10188-10194
  •   Request permissions

    Toward “rocking-chair type” Mg–Li dual-salt batteries

    T. Ichitsubo, S. Okamoto, T. Kawaguchi, Y. Kumagai, F. Oba, S. Yagi, N. Goto, T. Doi and E. Matsubara, J. Mater. Chem. A, 2015, 3, 10188
    DOI: 10.1039/C5TA01365H

Search articles by author

Spotlight

Advertisements