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Samsung have been working with Seoul National University, to develop a battery with both less charging time and more capacity. These two properties do not usually go together. For this, they've chosen an allotrope of carbon - Graphene.
They coated the electrodes of a battery with thin fluffy layers of graphene (Graphene balls). By doing this, they managed to fully charge a conventional EV battery with 45% increased capacity, in less than 12 minutes.
Traditional batteries consist of Lithium Ions, which are prone to side-reactions. This leads to electrode wearing, especially during fast-charge. Nanomaterials like Graphene can help prevent this, while improving conductivity.
Samsung went forward with this principle by using a material layout termed ‘Graphene Ball', to coat Nickel cathodes and Lithium anodes. The advantage of this coating is that it could be applied uniformly on the electrodes.
Charging cycles or battery-life could also be increased with this process, and the scientists behind this project claim that they've achieved energy densities close to 800Wh/L (which are Tesla levels).
If there is one great downside to electric cars, it is the charging time. No matter how much EV manufacturers claim about the less charging time, it would still be a substantial amount of time, usually in hours. Charging a full-size EV battery in less than 12 minutes sounds desirable, and it's high time that EV manufacturers should come up with such projects, just like how Samsung did.