Toyota create first magnesium-sulfur rechargeable battery

14 Фев 2015 | Author: | No comments yet »


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Toyota create first rechargeable battery

10 August

US researchers have demonstrated the rechargeable battery system a magnesium anode and sulfur The finding is significant because a battery promises to be substantially efficient than current battery technologies.

‘The rechargeable battery system has a technological target for a long because of the combination of high and low volume,’ explains Karl of the University of Leicester in the UK, who researches battery technology. ‘Also, tends not to form dendrites long, needle-shaped deposits that can destroy a working and present significant safety

Elemental sulfur is an ideal for a magnesium anode because of the energy density the system provide — more twice that of a lithium ion However, the chemistries of magnesium and are incompatible with most electrolytes, so coupling the electrodes has so far elusive.

Now, a team led by researchers the Toyota Research Institute of America (TRINA) in Michigan, has an electrolyte that works.

is investigating magnesium-sulphur batteries as an to lithium for vehicles

The challenge was to an electrolyte that would with both magnesium and To date, all magnesium electrolytes are which causes rapid of the sulfur cathode.

The research team reacted a organomagnesium halide, hexamethyldisilazide chloride, with the Lewis aluminium chloride. This in an electrochemically active species when crystallised and redissolved, a non-nucleophilic electrolyte that was successfully to couple sulfur magnesium.

A number of hurdles however. Takashi Kuzuya, manager in the materials research of TRINA, who wasn’t directly in the work, says: ‘As a of the discharging process, the sulfur was electrochemically reduced to form anions, which dissolved the electrolyte solution. Preventing dissolution will be crucial. challenge is the rate capability of the — the capability for rapid

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Kuzuya would not be drawn on how magnesium-sulfur batteries might in cars. ‘It is too early to whether it can be a real electrochemical or not. A magnesium-based battery is one of the for future battery systems.’

agrees that ‘very scientific and technological challenges’ but that ‘this is an exciting from a world-leading organisation in terms of underpinning science and technology of electric and hybrid-electric

Simon Hadlington

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References

H S Kim et al, Nature . DOI: 10.1038/ncomms1435

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