Graphene batteries why not replace lithium-ion batteries as electric car batteries?

Graphene is known as the "king of new materials" by researchers and the media. It is a new type of materials known for its high strength, good toughness, light weight, high light permeability, and good electrical conductivity. In this article, we discuss the graphics of batteries. Why not replace lithium batteries with electric car batteries?

Why not replace lithium-ion batteries with electric-vehicle batteries?

Their all-optical graphene polymer batteries have the advantages of higher energy and higher charging rates, which is exactly the point of pain for electric cars. As early as 2015, for example, huawei watt laboratory 56th Japan battery conference, a fast-charging technology, produced up to 48 % of its batteries in just five minutes for 3000 mah graphene batteries.

More importantly, as early as 2014, Kohl of the University of Havana developed the first graphene polymer material battery in cooperation with Spain and Spain's graphenano company.

Why not replace lithium-ion batteries with electric-vehicle batteries?

According to them, this battery has many advantages:

1, graphene batteries have energy of more than 600W/kg, storage batteries are three times the best products on the market, today's performance can be crushing(such as the current lithium iron phosphate battery monomer BYD energy density of 150 ~ 160 Wh / kg, Tesla's latest 21700 battery system has an energy density of 300 Wh / kg);

Why not replace lithium-ion batteries with electric-vehicle batteries?

2, a single voyage can be up to 1,000 kilometers;

3, single full charge only 8 minutes;

4, the service life is four times that of traditional hydride battery volume, lithium battery twice;

5, the weight is half of the traditional battery;

Graphenano said that the battery is 77 % less expensive than lithium batteries.

If these data are from a laboratory perspective, I am not entirely skeptical because cells are also called graphene Qian Liqi "circle" or "paper edge tool." Do not believe in college, study this matter very good post, but really entered the practical stage, basic mistakes.

If this is deliberately degrading graphene batteries, the method is very simple. For example, in the past four years, graphene has never been seen in our sights.

From its website, it is based on the latest news from the National Conference or graphene applications in other products, such as dental products. Don't make the market for electric cars bigger, don't make medical supplies bigger, don't make heads bigger, or else we overestimate their products.

In fact, graphene applications in batteries are mainly combined with Silicon, so-called graphene batteries, or essentially lithium batteries. There is no way to fundamentally change the energy ratio of lithium-ion batteries.

The cathode in the battery replaces graphite, although it can increase the overall capacity and charging speed of the battery, but the performance improvement is limited and can not be stronger than the above.

Of course, this does not prevent the large-scale production of graphene batteries, mainly due to its internal difficulties.

1, all graphene batteries are very expensive, and preparation is difficult, almost no energy generation. Now some of the amazing numbers that are basically released come from the high purity of graphene batteries and only appear at the conceptual stage or laboratory;

2, "doped graphene batteries" is the function of conductive reagents for lithium batteries or lithium electrode embedded materials, but the performance improvement brought by the former is not enough to attract all manufacturers compared to the low cost of conventional conductive carbon and graphite;

3, has a high specific surface area of the graphene material itself, and now the lithium ion battery industrial technology system can not allow;

In addition, if the impact of other materials(such as the theoretical capacity of Silicon pair cathode) and the dispersion process is more difficult, it is maintained in the application of lithium batteries.

In short or medium term, it is not possible to remove graphene batteries first rather than lithium batteries; Although "graphene doped lithium battery" has certain application prospects, it is not large enough to completely shake the structure.

The page contains the contents of the machine translation.