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Lithium, a highly reactive metal, will fire off its electrons in a fizzy display if placed in water.  As one source explains, “The lithium-water reaction at normal temperatures is brisk but not violent.” It comes as a surprise then that one lithium battery manufacturer, PolyPlus Battery Company, insists on putting its lithium battery electrodes in H2O.  The firm makes both lithium/air and lithium/water batteries, holds over 72 patents on its intellectual property and has recently earned, along with its partner Corning, an ARPA-E (Advanced Research Project Agency – ENERGY) grant of nearly $5 million.  It also made Time magazine’s list of the “50 Best Inventions of 2011.”   It will be presented as a finalist in the Edison Awards dinner in …