Graphene battery: work for 1,000 km after charging for 10 minutes?

Recently, Qi Lu, the Beijing university professor, published a speech report titled "Present Situation Analysis of Level 5V Lithium Ion Secondary Battery Technology Development". The following is the speech report records:

Good morning, everyone! I'm very glad to have chance with you from the academic technology to explore the now common lithium battery problem, because the time is enough, today want to say two words else, ten days, the Beijing smog serious bad in this situation, it is also a very close relationship with us, it is said that will last for five days, five days after the national meteorological center said, will have a cold snap from Siberia. I think everyone remember very clearly, a few years ago old said have dust storms, hope dust storms come now, if there is no Siberia to the wind, as if Beijing will not fog haze, not only in Beijing, north China, the central plains, look at today's Wuhan, our country is in this situation.

With auto relationship I think is not actually too close, have a plenty of cars around the world than China, but to those places, people look to Japan, the United States, Europe, have such a situation? But with such a thing, our electric cars to the rapid development of our battery also can sell well, hope we make good use of this chance.

About 5 v lithium ion secondary battery, has always been very expect one thing, because of yesterday's report everybody also saw, the threshold of the batteries have improved, is now at about 100 watt-hours per kilogram, the real of monomer battery, we can implement this much. So true to more than 200 or 200, should be refers to single cells, because every refrigeration technology, thermal insulation technology is different. So do after electric cars, first, the price is absolutely not like when people discuss each tile yesterday for a dollar, or 200 watts per kilogram.

Everybody have a look at this picture, the vertical is the battery voltage, capacity of abscissa is, from this chart we can see very clearly that we now whether small lithium-ion batteries, lithium-ion batteries or electric cars power battery, whether lithium titanate battery, or lithium iron phosphate batteries, probably see it more clearly. You can see the next generation of battery technology, compared with titanate lithium battery, its voltage, almost double its energy density everyone can look forward to. In the future, such as when we do 200 watts per kilogram, 300 watts, firmly relying on such materials are not enough. You see the red line, this also is a kind of special, as the next generation of battery materials we have launched a new material, it has a capacity of more than Andy cobalt acid lithium, or ternary material. The same is true of manganese, cobalt, nickel based. Of course it is not completely such technology can improve the battery energy density, it also includes the cathode technology, there is a called silicon anode technology, can be much more than today's level of carbon materials.

, of course, it may still have a certain amount of time on technology application problems, the future I want from the battery energy density, tell from the battery life, is crucial for the future of lithium technology progress very fast and eventually realize the cathode for lithium metal anode materials of such a later, our battery energy density breakthrough 200 watts per kilogram, 300 watts is very easy, and also is the problem of a few years time.

A lot of friends in recent days to discuss with me over the past few years appear more batteries, like graphene batteries, etc., today I want to focus your time share with you from this Angle we open some information on this. Graphene battery is Fried very hot the past few years of a battery, the battery to the end? We have reported that said ten minutes recharge run one thousand kilometers, what is going on? Can do it like that? The battery is to make it to the people, but what is the battery? Exactly how much battery today with us the difference? Graphene is what? Everybody look at first.

Graphene is to enter the century since it was found that a new material, it is not five so-and-so synthesized a kind of new material, it it is in the middle of the traditional mineral. So for this matter, because of the extract from graphite by such a very valuable, conductive performance is very good graphene. So you see, on this matter ten years ago scientists won the Nobel Prize, after that, because of graphene has very good physical properties, chemical properties, it has been applied to many aspects, and it is the value of the future potential is very huge.

Some reports, this report I also didn't see the report of the original, real Chinese reports is translation problems or any questions, we should continue to have a look. According to it, the battery capacity is 3 times of the market at present the best products, with the batteries provide power of the electric car driving up to 1000 kilometers, the charging time is less than 8 minutes. I want to have some analysis on this matter, with battery how many difference we now? It said, the graphene polymeric material, longer service life of the battery, is four times the size of the traditional hydride batteries, is double of lithium-ion batteries. Although graphene is very special, its cost will be 77% lower than a lithium-ion battery, I think we analyse on this question. What is a 1000 km? What is charging less than 8 minutes? What price is half of the conventional batteries?

On the issue of the electric car or battery charging, I want to 10 minutes, or eight minutes of charging, our today's battery can do this. Probably use the charging ratio to 10 c, today our multiple anode metal composite oxide to charging is very easy to do this. We remember very clearly, in 2000, we are one of the most famous natural science journal, published an article, aliens in 15 years ago prophecy, we drink a cup of coffee, will make a full charge. What is the result of 15 years? Only from the results of the material, it is concluded that magnified many times has been moved to the conclusion of electric cars, today the result of everyone is very clear. From the material point of conductive performance is good, there is no problem to do it. But the actual situation? The 2008 Olympic Games in Beijing when we remember very clearly, 50 electric buses to charge, for it have been for about half a year in Beijing, for the power problem, finally had to decide, it is impossible to implement such a high power charging.

We all know that the basis of today's power grid is built on what?10 c what does that mean? Like to travel 1000 km, according to Volvo yesterday the given data, BYD also gives data yesterday, we usually travel 100 km, the car will need at least 15 kw, 20 KWH battery, if you want to travel 1000 km, what means? We need hundreds of KWH battery. If I use 10 c to charge again, it is what kind of power? Today the city power grid is simply can't do it. Technically there is no problem, we cannot do it.

In addition, today we are going to promote family car for example, if simply, we don't have to consider the problem of charging pile, if we move the car to go home, in our own power to charge is the most convenient, the cheapest, the most simple, is the most easy to implement. City because of the high power, charging pile to quick charge, the problem is now not achieve them. So what we pursue today? For example we want to use the home charging power supply, I think two hours, three hours to solve this problem.

So, from the graphene battery, about 8 minutes recharge, our battery can too. But how much meaning? Another distance problem, he said, up to 1000 km. Our battery today, I feel more than lead-acid battery can travel 1000 km. So for electric cars, can't just use distance to describe completely pull a car battery don't pull, run 2000 kilometers. What is the concept? I think it's about single battery or unit weight, volume weight can drive a car, so distance to describe the advanced nature of the electric car. Such as battery energy density. So, I think it should be all clear.

In addition, our electric car how much shall be equipped with battery? Exactly how many kilometres should be set to the appropriate? In Paris, for example, some people have done statistics, the average people driving to and from work only about 25 km, like Tokyo is 60, 70 kilometers, Beijing? How many kilometers? It is necessary to give it a configuration 1000 kilometers of the battery? In the current battery is very expensive, so if you want to do a we can accept, properly configure the battery of electric vehicle and properly consider it charging rate, that we may achieve faster. Of course, we are also considering other technology.

About lithium battery life, yesterday's report, BYD boss see very clearly that we run 300000 kilometers, 500000 kilometers, according to the charge to run 200 kilometers, the long service life, no matter how their technology, our lithium battery life in the present on the basis of comparing the two times is very easy to implement. But we don't have to catch up with him and there are many other technologies, I made a report earlier this year, the state grid, why they buy back the battery monomer battery test life is pretty good, but put it together as a module to use, fast attenuation, difference between battery rapidly expand, why will appear this problem? We use the process of the problem of too much.

About the weight of the battery, I said just now, as long as our high voltage material, we are more appropriate electrolyte material, to our material after implementation, triple the weight energy density is the simple things, we want to achieve, we can achieve tomorrow. So that graphene battery it with today's lithium battery concept there is a big difference in the structure, so we hope you pay more attention to it.

About the price of the battery, he says is 77% cheaper, calculate very accurate, I don't think we use how long time will see very clearly that we today China monomer lithium batteries we have discussed yesterday, the price of 1 watt hour 1 yuan, very cheap, near lead-acid batteries, lead-acid battery how expensive? But abroad, it is not like that, for example, he is in accordance with the foreign price calculation, lithium-ion batteries in Spain or in Europe, or in North America, all could not see a decent so far, no one was there to do these things, so it is hard to imagine them the price of lithium battery. To Japan as you can see on the market, carry a phone battery, the yuan is controlled yuan, at least not as we today is so cheap. So it is the price of this price is with what region compare? I want you to know more about.

This thing was said here, with just the graphene batteries do contrast, I think we multiple metal oxide anode electrochemical characteristics of lithium battery also introduce to you, there are a few picture, this is the basis that we compare early, ten years ago we for hundreds of hybrid electric bus in Beijing to provide such a battery module, you can look at the lower left corner of 8 c charging, 10 c discharge, carried out more than one thousand times charging and discharging, this is the result of ten years ago. What if 1 c to charge and discharge? This is the result of a 50000 times, in fact, as a high power battery performance is very good, so its service life, we shouldn't worry too much.

Say simply the graphene, because I want to be very useful graphene, as a new material, discovered by you for ten years, in various fields has a very good use in the future. Tell from the chemistry, it is one of the most simple carbon such a molecule, we have studied chemistry, it is the same with benzene as a result, a ring of 6 carbons, it is said that in the past no one noticed in graphite, so its features in a long time not been realized. Fortunately, you finally to separate it in more than ten years ago, and because of this matter, because the research on its performance, won the Nobel Prize.

Graphite, diamond, and graphene, it in the above, the difference between diamond why hard? Diamond is composed of carbon, it is entirely composed of carbon, carbon and acting force between all of them are between carbon atoms. Graphite, graphite can be said to be such a graphene layer by layer overlay, it is another kind of force between, it is not like diamond, diamond between each layer are forces between atoms of carbon and carbon directly. Graphite is not the case, the graphene is a single layer, on the two-dimensional spatial extension of such a chemical. From the above we can see very clearly that what is called fullerenes, also won the Nobel Prize for this, or what is carbon nanotubes, it formed a three-dimensional objects when they become today's graphite. Therefore graphene is constitute the basic unit of the other graphite material. Basic structure unit of graphene for the organic material in the stability of the benzene six-member ring.

Single-layer graphene, double-layer graphene, multilayer graphene, graphene material its chemical structure, its physical properties, much remains to be for people to research it.But make it clear quickly, do it in front of the application of it, I think we present here a lot of people are already in a job like this. It is said that some friends have made important progress in this aspect, but reports from just foreign battery this perspective, also have other friends will discuss below, graphene is undoubtedly will be very valuable in the future.

Advanced battery we want attention, behind the battery, the battery I want you to also don't forget it, I simply said yesterday it's just the matter of the lead-acid battery, now is terrible, to a degree? We some mine, the mining area, lead to health problems, our country has a large number of reports. Recently, in our food, milk, the dairy products and many respects have dangerous levels of problems. It leads to what? Because of the time, I don't want to say more here. All in all, especially children, our children and grandchildren, will be seriously affected by lead pollution. So reduce the use of lead-acid battery, grasping the lead-acid battery recycling, today we have a lot of lead-acid battery after be buried directly, this is the worst, the most terrible problem.

Because time relationship, finally I am going to talk about our battery application problems, one is the future energy storage, lithium battery will quickly into the field. On the other hand, just now I said to the lead-acid batteries, lead-acid batteries, lithium batteries since we arrived 1 watt hour 1 yuan, the car I think we should consider to replace it with lithium batteries. In solar energy in the future, in the use of wind and other natural energy, lithium battery is has the application value of very, today's price has come to such a degree. Some friends have begun to do this work.

A simple example, such as the recent several kilowatts, dozens of kw this small group of border posts, island, using an example of this has emerged on a large scale. Many people, for example, in Mongolia grasslands, there are about hundreds of herdsmen still without electricity, Tibet had seven hundred thousand herdsmen completely without electricity, Yunnan mountain villagers also has a lot of no electricity, is such a small device can completely solve this problem. So our lithium battery application rapidly expand, new market is very big, will also help us in these areas to grab some of the commanding heights.

Lithium battery, I think the most pressing a few topics I want to say, is must improve safety and reliability, burning explosion problem in recent years is too much. Actually we electric car is not to say that as people imagine so simple, hundreds of kilograms of battery carry into the car, somebody publicly reported yesterday, tesla carried more than seven hundred kilograms of batteries, how many kilometers can run? Is it safety, reliability, exactly? Our many domestic manufacturers of battery life, it has a capacity of fast attenuation, everybody is obvious to all. So the reliability, security, must take the time to improve this problem.

High energy density must do lighter, because time relationship, we have been thinking about going to solve these problems from these aspects, also hope that with more friends to discuss these questions, call it a day here, thank you!

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