55167557 story Metal-Free 'Rhubarb' Battery Could Store Renewable Grid Energy 131 Posted by Unknown Lamer on Thursday January 09, 2014 @07:05PM from the energy-storage-pie dept. sciencehabit writes "A molecule nearly identical to one in rhubarb may hold the key to the future of renewable energy. Researchers have used the compound to create a high-performance 'flow' battery, a leading contender for storing renewable power in the electric utility grid. If the battery prototype can be scaled up, it could help utilities deliver renewable energy when the wind is calm and the sun isn't shining." Abstract.