HOUSTON – (Dec. 11, 2012) – Here's a reason to be glad about madder: The climbing plant has the potential to make a greener rechargeable battery.
Scientists at Rice University and the City College of New York have discovered that the madder plant, aka Rubia tinctorum, is a good source of purpurin, an organic dye that can be turned into a highly effective, natural cathode for lithium-ion batteries. The plant has been used since ancient times to create dye for fabrics.