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      Prototype systems for rechargeable magnesium batteries

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      Nature

      Springer Science and Business Media LLC

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          Abstract

          The thermodynamic properties of magnesium make it a natural choice for use as an anode material in rechargeable batteries, because it may provide a considerably higher energy density than the commonly used lead-acid and nickel-cadmium systems. Moreover, in contrast to lead and cadmium, magnesium is inexpensive, environmentally friendly and safe to handle. But the development of Mg batteries has been hindered by two problems. First, owing to the chemical activity of Mg, only solutions that neither donate nor accept protons are suitable as electrolytes; but most of these solutions allow the growth of passivating surface films, which inhibit any electrochemical reaction. Second, the choice of cathode materials has been limited by the difficulty of intercalating Mg ions in many hosts. Following previous studies of the electrochemistry of Mg electrodes in various non-aqueous solutions, and of a variety of intercalation electrodes, we have now developed rechargeable Mg battery systems that show promise for applications. The systems comprise electrolyte solutions based on Mg organohaloaluminate salts, and Mg(x)Mo3S4 cathodes, into which Mg ions can be intercalated reversibly, and with relatively fast kinetics. We expect that further improvements in the energy density will make these batteries a viable alternative to existing systems.

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          Most cited references 15

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          Nonaqueous Electrochemistry of Magnesium

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            Common Electroanalytical Behavior of Li Intercalation Processes into Graphite and Transition Metal Oxides

             Doron Aurbach (1998)
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              Magnesium insertion electrodes for rechargeable nonaqueous batteries — a competitive alternative to lithium?

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                Author and article information

                Journal
                Nature
                Nature
                Springer Science and Business Media LLC
                0028-0836
                1476-4687
                October 2000
                October 2000
                : 407
                : 6805
                : 724-727
                Article
                10.1038/35037553
                11048714
                © 2000

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