Graphene batteries: what is it?

Smartphone не перестают удивлять нас новыми возможностями. И только один параметр пока не радует — батарея.

I must admit that modern mobile batteries is not so bad. They are able to feed the device during the day and charged within a couple of hours. But in reality, this is not enough. Someone accepted the lack of autonomy and bought poverbank. Someone is willing to pay any money for smartphone longevity. And dream how it would be nice to put the phone on charge every night, and every two or three days or even once a week. These dreams can become a reality when manufacturers will start to put in smartphones graphene batteries.

What is graphene battery?

Before talking about the advantages of graphene battery, let's see what kind of material is this graphene and what are its properties.

Graphene is a collection of carbon atoms bound in a hexagonal lattice reminiscent of a honeycomb. The uniqueness of graphene as chemical compound is that its structure has a thickness of only one atomic layer. Graphene plate has valuable qualities: she is an excellent conductor of electricity and heat, is very elastic, durable and lightweight. In the energy sector, the most critical play of the first two properties – electrical and thermal conductivity. These two parameters of graphene is superior to copper is the best conductor among the metals.

Graphene can find many applications. The ideal option is to create a graphene supercapacitor. Supercapacitor – a next-generation battery with high capacity, which are able to give and accumulate charge with rapid speed.

On graphene, the world began in 2017 after a sensational statement Samsung: the scientists, the company has developed a "graphene ball", which can be used in the manufacture phone batteries and automotive batteries. In 2019, there were hints that Huawei is going to use innovative battery once flagship line P. the USmors were just rumors. While technical difficulties did not allow to use graphene sheets in consumer products. However, the interest of major manufacturers for graphene technology is becoming more and more clear: recently it became clear that the development of a new type of batteries for electric vehicles leads Tesla.

Graphene battery vs lithium-ion

In graphene batteries, as lithium-ion counterparts, it uses two conducting plates, covered with a porous material and immersed in the electrolyte solution. Despite the similarity of the internal structure, both types of batteries have different characteristics.

Graphene conducts electricity more efficiently than lithium ions. Such a battery can accept current of great strength. This feature plays an important role in the production of powerful car batteries as well as for reverse charging, where a single gadget gives current to another wirelessly. High conductivity implies that the battery is heated less, but because it is less prone to wear even in the cramped phone cases.

Graphene batteries can be lighter and thinner than Li-ion. This opens up the engineers from two different possibilities – to create a small super-thin gadgets, or install electronics battery with increased capacity without changing the existing dimensions of the device. For comparison: Li-ion battery accumulates up to 180 WH/kg of energy, and graphene – up to 1000 W-h/kg, i.e. 5.5 times greater.

Finally, graphene battery safer. Despite the fact that Li-ion batteries have a pretty good safety performance, history knows several major incidents relating to their failure or improper operation. Overheating, overcharging and damage to the body can cause chemical imbalances, and this in turn leads to a fire. Graphene is much more stable, so these problems are threatening him less.

The lithium-ion batteries serve to benefit humanity for decades, and it should be noted that they do not disappear in an instant with the transition of manufacturers on graphene. Graphene compound can be used to improve the performance of the cathode conductor in lithium-ion batteries. Hybrid batteries also have attractive properties – they are lighter, charge faster, last longer and contain more energy. Therefore, the first consumer rechargeable batteries with graphene likely to be hybrids.

Graphene batteries in smartphones

Smartphone с батарейкой на основе графена будут обладать всеми перечисленными преимуществами. Они смогут заряжаться намного быстрее, чем сейчас, время от зарядки до зарядки с легкостью увеличится до двух дней, а то и больше.

The transition in graphene will lead to the increase of the battery capacity at least 60%. By itself, graphene battery heats up less than Li-ion. If you have a good system of heat dissipation it will last longer. After a few years of operation, the phone is still good to keep the charge, and its owner will not have to pay a lot of money for replacement batteries.

Graphene will produce even more slim smart phones or provide them with improved battery life while maintaining current dimensions. Function reverse charging will become more popular: since graphene can withstand high current, gadgets will be able to exchange energy with enormous speed.

Work to create graphene batteries is already a few years. Their introduction is not far off. Follow the news and you will learn what gadget will be the first to carry a graphene battery.



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