Renewable energy gets help from an unexpected place

Renewable Energy World: Flow batteries – more akin to fuel cells, really – are getting increasing attention as researchers press to meet a need for energy storage brought on by the rise of intermittent renewable sources like solar and wind.  Now Harvard scientists, backed by the Obama administration’s ARPA-E program, have written up an advance that they say addresses the key matter of flow battery expense, thanks in part to rhubarb.

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