Researchers in the US have successfully used recycled plastic to create rapidly-charging energy storage devices. The research team is composed of engineering professors and students at the University of California Riverside (UCR), and they have been working on using sustainable resources – ranging from glass bottles to portabella mushrooms – to create improved energy storage materials for some years now. Their latest development involves the ‘upcycling’ of waste polyethylene terephthalate (PET) plastic. PET is widely used in consumer products, most prominently in soft drink (in US parlance, soda) bottles.