From：CTECHI GROUP Limited Release time：2018-09-28
Overview：Batteries are a main limiting factor in the popularity of electric cars. They are one of most important parts of the electrical vehicles, and have limited range compared with gasoline powered vehicles. While there have been some impressive advances in recent years, a team of researchers have created a supercapacitor film that could replace the need for a battery altogether within the next five years.
Batteries are a main limiting factor in the popularity of electric cars. They are one of most important parts of the electrical vehicles, and have limited range compared with gasoline powered vehicles. While there have been some impressive advances in recent years, a team of researchers have created a supercapacitor film that could replace the need for a battery altogether within the next five years.
The supercapacitor is made up of two layers of graphene with an electrolyte layer in the middle. Extremely high power density graphene battery is stronger, thinner than normal thin film rechargeable lithium battery, and is able to release a large amount of energy in a short amount of time, which is essential.
Vehicles need an extra energy spurt for acceleration, and this is where supercapacitors come in. They hold a limited amount of charge, but they are able to power it very quickly, making them the perfect complement to mass-storage batteries. Supercapacitors( extremely high power density graphene battery ) offer a high power output in a short time, meaning a faster acceleration rate of the car and a charging time of just a few minutes, compared to several hours for a standard electric car battery.
Ordinary lithium ion batteries for electric cars occupy a large amount of space, whereas the supercapacitor film could be integrated into multiple areas of the vehicle, such as the body panels, roof, floor, and doors. A small supercapacitor could provide the vehicle with larger amount of energy than small thin film rechargeable lithium battery, while making the vehicle itself much lighter.
The graphene-based supercapacitor film would be able to be fully charged within several minutes, rather than the several hours it takes for a conventional thin film rechargeable lithium battery. But while it might charge and release energy faster than standard lithium ion batteries for electric cars, they currently don't hold nearly as much energy. This is one aspect that the scientists hope to change with further study.
In the future, it is hoped the small supercapacitor will be developed to store more energy than a small thin film rechargeable lithium battery while retaining the ability to release its energy up to 10 times faster - meaning the car could be entirely powered by the supercapacitors in its body panels. After one full charge, this car should be able to run up to 500km (310 miles) - similar to a petrol-powered car and more than double the current limit of an electric car.
Because the supercapacitors are made out of graphene, a layer of carbon only one atom thick, the film is a more ecological choice. Additionally, because carbon can be gained more easily than the lithium found in conventional batteries, it could end up being fairly economical as time goes on and production becomes more widespread.
The price of Li-Ion batteries cannot decrease a lot because lithium is expensive. This technique does not rely on metals and other toxic materials either, so it is eco-friendly if it needs to be disposed of.