2015年10月20日星期二

Lithium-sulfur Battery

     Lithium-sulfur (Li/S) battery is a kind of rechargeable battery adopts lithium as negative electrode and elemental sulfur as positive active material. The theoretical specific capacity of its positive electrode is expected to reach 1675mAh/g, and the theoretical specific energy of the Li/S battery is expected to reach 2600Wh/kg. Its achievable practical energy density may reach 750Wh/g.
    In accordance with the report published at Phys.org on January 13th, 2015, the new material discovered by chemistry professor Linda F. Nazar and her research team could maintain the stability of Sulfur cathode, which is the major obstacle in the research of lithium-sulfur battery. Theoretically, the running time of lithium-sulfur battery is 2 times longer than that of ordinarylithium ion battery at same weight. What’s more, it’s cheaper than lithium ion battery.
     In July 2010, lithium-sulfur battery produced by Sion Power is applied on an American unmanned solar plane, which has attracted the attention of the public. Part of the electricity generated at daytime is stored in the lithium-sulfur batteries and discharged at nighttime. The unmanned solar plane has flown 14 days continuously.
                                         Lithium-sulfur Battery                   

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