Batteries are at the heart of our most important daily technologies. Your phone, your laptop, and eventually your car and home, all rely on storing energy in batteries. Current battery technology is great, but graphene batteries could solve their shortcomings.
What Exactly Is Graphene?
There`s a good chance you`ve heard about graphene in the media before. Every few years there are breathless predictions of how this wonder material will transform various technologies. What you may not know is that graphene is just carbon. The same stuff life on earth is based on and an incredibly abundant element on earth.
Graphene is a one-atom-thick crystalline lattice of graphite, which is essentially crystalline carbon. This sounds like something incredibly fancy, but you can make flakes of graphene with a pencil and some sticky tape. The Nobel prize for doing so, though, has already been awarded.
Graphene has several properties that make it very exciting as a potential part of future technology. It has high thermal and electrical conductivity. So if you want to move electricity or heat with high efficiency, it`s a promising choice.
Graphene also exhibits a high level of hardness and strength. It`s very flexible and elastic. It`s also transparent and can be used to generate electricity from sunlight.
Graphene Is Hard to Mass-Produce
This all sounds wonderful, but there`s a big roadblock. Although it`s trivial to create graphene flakes or small sheets for research in a lab, mass production is proving difficult. If it weren`t for the challenges of mass-producing this nanomaterial reliably, it would have been in products ages ago.
The good news is that there are several promising avenues to mass production that could make graphene cheaper enough to hit the mass market. Graphene-infused fiber can now be made in reasonable quantities. Graphene can also be produced using solvents, although these are highly toxic. Researchers have been looking into safer solvents and that seems promising as well.
Graphene is currently often made using chemical vapor deposition. Here the graphene forms as a layer on a substrate material. The problem with this is that the defect rate in the graphene is high. New research using liquid (with its perfectly flat surface,) as a substrate might solve the defect rate problem. So assuming that we eventually crack graphene mass production, why do we want it in batteries?
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