This film (a part of GE’s Focus Forward film series) goes over a break-through in graphene supercapacitors, technology that could replace lithium-ion batteries for all sorts of gizmos. The video describes this as one of those fortuitous accidents where they were studying Graphene for one purpose, but found that it could serve a completely different purpose. Namely, it could work as the key technology to a supercapacitor.
Supercapacitors bring together the best of both worlds, high energy density as well as high power density. That means they can work well for energy storage on-board an electric vehicle or perhaps other purposes, like handheld gizmos or grid energy storage units. At the same time they deliver power quickly enough, and recharge quickly enough, to work great for electric cars. At the same time the materials (carbon) are benign enough that apparently you could put a graphene batter in the compost bin.
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