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Since this year, GAC has made good publicity on graphene batteries. The latest news is that GAC revealed on the interactive platform that the research and development of graphene battery is ongoing, and it is expected that this technology will enter the mass production test of real vehicles at the end of this year. It is understood that GAC Aian will be the first brand to use graphene batteries.

So, what is graphene battery? Is the performance of graphene battery good? Will graphene battery replace lithium battery?

From the perspective of the market, graphene battery was relatively hot in the battery industry in the past few years, but it finally fell silent. The mainstream battery in the market was lithium battery. Whether graphene battery is good or not, let's first understand what graphene battery is.

The so-called graphene battery is a honeycomb planar film formed by carbon atoms in the form of sp2 hybrid. It is a quasi-dimensional material with only one atomic layer thickness, so it is also called monoatomic layer graphite. It is a new energy battery developed by taking advantage of the characteristics of lithium ion's rapid and massive shuttle movement between the graphene surface and the electrode.

Graphene battery has 6 advantages:

1. The storage capacity is three times that of the best products in the current market. The specific energy of a lithium battery (whichever is the most advanced) is 180wh/kg, while the specific energy of a graphene battery is more than 600whkg;

2. Electric vehicles powered by this battery can travel up to 1000 kilometers, and its charging time is less than 8 minutes;

3. Long service life. Its service life is four times that of traditional hydrogenated battery and twice that of lithium battery;

4. Light weight. The characteristics of graphene can reduce the weight of the battery to half that of the traditional battery, which can improve the efficiency of the machine carrying the battery;

5. Compared with traditional batteries, graphene has more advantages. In terms of service life, its service life is twice that of lithium batteries and four times that of hydrogenated batteries;

6. Faster charging speed and more durable than lithium battery at high temperature.

Of course, such a good battery cannot be without shortcomings, otherwise it would have been mass produced. In fact, the disadvantages of graphene battery are very prominent:

1. Incompatible process characteristics. The large specific surface area of graphene will bring a lot of process problems to the dispersion and slurry equalization of existing lithium-ion batteries. The surface characteristics of graphene are greatly affected by the chemical state. There are many problems in batch stability, cycle life, etc., which can not meet the detailed requirements of production at present.

2. These graphene batteries on the market are not pure graphene batteries, but are doped with some graphene-related technologies on the basis of lithium batteries. Compared with traditional lithium batteries, their performance improvement is only a little bit.

3. The cost of graphene is very high, and its manufacturing process is also very high. The manufacturing process of graphene battery is still not mature. At present, it is only in the laboratory stage and cannot reach the level of mass production.

4. At present, graphite thin has not reached the practical stage, and there is still a long way to go from mass production.

Even GAC, while claiming that "it is expected that this technology will enter the mass production test of the real vehicle at the end of this year", also stressed that "whether the technology can finally achieve mass production still needs to wait for the verification results of the real vehicle. In addition, the realization of the graphene battery fast charging technology also needs to solve the cost, as well as the charging supporting facilities and other issues."

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