Graphene supercapacitors could dramatically transform battery charging.

“With any luck, in the next 10-15 years, we’ll have super capacitor batteries that can handle energy densities at industrial scales giving us quick, plentiful electricity whenever we need it says Joe Scott.

“Super capacitors work differently. Instead of using a chemical reaction to make electrons flow, also called and electrochemical process, they use static electricity, or an electrostatic process.
Now, capacitors have been in our computers for decades, and they work by holding opposite charges between two metallic plates separated by a dielectric material.
Super capacitors, as you may have already figured out, are larger versions of capacitors that use a double layer to hold more energy. In fact they’re sometimes called double-layer capacitors.
And the cool thing about them is that since the electricity is static and not chemical, there’s far less resistance to the charge. In fact, it’s almost instantaneous.
If, theoretically, you could create super capacitors that could hold as much as a lithium ion battery, you’d have cell phones that could recharge in seconds and it would be good for the rest of the day.
And dare we dream it? An EV car that fully charges faster than it takes to pump gas.
There is one material that could make this dream a reality. It’s called graphene.”

Graphene supercapacitors. Note: the video above was 2017 and you will see some other more recent stories on this site that update the story. See also A graphene breakthrough hints at the future of battery power or High volume, high power graphene supercapacitors which summarises the reason graphene is so suited to this kind of usage.

“However, most supercapacitors currently used can only store small amounts of energy compared to batteries. This depends on their porous layer electrodes, which dictates the amount of electrostatic charge stored at the interface with the electrolyte. The higher the surface area and conductivity, the higher the charge the supercapacitor can store and thus its energy and power. Being a two-dimensional material, graphene has the highest surface area and it also an electrical conductor. Therefore it has the potential to greatly increase the storage capacity of supercapacitors.”

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