Dangsheng Technology Chen Yanbin: battery materials with high energy density are very simple, while the difficulty is how to maintain comprehensive performance.

The second power battery application of international summit and the third China battery industry intelligent manufacturing workshop "kicked off in Beijing. The summit by the Chinese chemical and physical power industry association and battery China, Tianjin lishen battery Co., LTD. Jointly organized; China's chemical and physical power industry association branch to undertake power battery application, Wuxi Lead Intelligent Equipment Co., Ltd. Jointly undertake. Attend the summit in more than 600 people.

"Bound and development: to redefine the vehicle battery" as the theme of the electric car market BBS, by the Chinese chemical and physical power industry association power battery application branch senior consultant, national science and technology achievement transformation fund son new energy vehicles venture investment fund partner and presided over by President Jian-hua fang.

Beijing Easpring Material Technology Co., Ltd., vice general manager of Chen Yanbin introduced litres of science and Technology high power li-ion battery cathode Material sliding/latest progress of NCA.Speech activity is as follows:

The progress of the anode materials Chen Yanbin: tell me something about us.Although when science and technology in the industry for many years, supply to you, do a simple introduction.We are do oxide began in 1992, since 2000 the cobalt acid lithium exported to South Korea, in 2008, 2009, began to do the ternary material and manganese acid lithium, exported to Japan and South Korea, in 2010, listed after we that part of the Red Cross, is in Jiangsu province when l first phase, the second phase of construction, the construction of the second phase of our production capacity has reached the annual output of 16000 tons.

Our current products, we listed before is a digital supplier of cobalt acid lithium battery, but until now we should mainly do three yuan material is given priority to, shipments of cobalt acid lithium may account for less than 20% of the company, the ternary material accounted for 80%, mainly including 523, 622, 811, and the NCA.

At present, from 2001 to 10 67 now, we from cobalt acid lithium to ternary material to manganese acid lithium is the first exported to international markets, it should be said to China, Japan and South Korea also can supply the positive material is one of the few manufacturers at the same time, including digital battery materials at that time, our production to three yuan high nickel power battery materials exported to foreign countries, including up to now we have to Tesla energy storage battery materials, we implemented a lot of the first, in 2016, our shipments, ternary material shipments must be ranked the first in China, our exports account for more than 40% of total domestic exports, in September 1, 2017 data are in top level, of course we are the first to our country the anode materials for the main business of the listed company.

The second part of the anode material market.The anode material of lithium-ion batteries in 2017 shipments of 135 GWH, automotive 56 GWH, accounting for 41% of the market, but by 2020, the total shipments will reach 265 GWH, vehicle will account for 156 GWH, accounted for more than 60%, leading the market since 2020.

The anode material, 2017 will reach 280000 tons, including lithium cobalt acid 69000 tons, three yuan + sliding and NCA is 158000 tons, has accounted for 56%, has been the dominant, and of course the manganese acid lithium and lithium iron phosphate, by 2020 the total cathode material will reach 460000 tons, at that time the NCA + three yuan will reach 350000 tons, accounted for 75% of the market, so that you can see, including day to listen to a lot of report, you can see, it should be said ternary material sliding and NCA should dominate the future power battery, high energy density, of course, also including the application of energy storage battery.

This picture it is clear that we all use lithium iron phosphate, although it may be 150 w/kg, while ternary material also can do 180 watts/kg, 622 can do 230-250 watts/kg, 811 can do 288 watts per kilogram, of course, we can also improve the voltage, can be done from 523 230 watts/kg, 622 high voltage can reach nearly 280 watts/kg level.

Do three yuan for high energy density materials, through high nickel or increase the voltage, the energy to do it is very easy, but it is the cycle of life will be more bad, including normal temperature cycle life and high temperature cycle of life, of course, his high temperature storage features will also have a question, high energy is very easy, but it is difficult to solve the performance, of course he has a lot of reasons, in addition to we usually say that the charge and discharge, the surface of the electrolyte reaction, a lot of side effects, for example, in the case of three yuan material, a big problem because of rupture of particles, powder, pulverization after a new interface, generate new side effects.The main solution, the first is for certain, he how to pulverization introduced his pulverization, let him become weakened, make particles more strong.The second, of course, pulverization stop, how to relieve him.Even if the pulverization, the inner surface of the particles inside can handle in advance, make it more stable.

Of course there are some traditional stable structure of doping, coating and so on some measures.This is the example, the original bottom was once upon a time the body, it is relatively loose, do three yuan material is loose, formerly the structural strength of the body to the anode material, such as life greatly extended.Now of course as well as a new method, is to be single crystal, crystal pulverization of problems and particle fragmentation, it would be greatly reduced.So to solve the problem of the ternary material, before the body is very important, the body to do before the anode material basically completed the half, the middle that is to say we do when science and technology, from the high density of spherical, although is spherical material, particles on the surface to see long is different, some suitable for high volume, some suitable, for long life and suitable for high rate, of course, some suitable for single crystal, before his body is different.

And there was some doping technology, wet doping technique, and dry mixed technology.And surface coating and processing, from the outer surface of the particles, particles within the interface, how to deal with, make him the cycle of life have a big improvement.

Specific to our these materials, in 523, for example, the first two are dedicated cylindrical battery inside, no doping, no coating, he mainly use cylindrical battery, his life about 1200 weeks of life, we probably behind the development of the vehicle and energy storage is that 4 kinds of yellow material, such as 12 micron mainly use EV, PHEV, the high rate of 5 microns do material, 5 sc single crystal, there are 5 ess is energy storage, to form a complete set of tesla's material, that material by former body, by doping, by coated, his life in more than 4000 weeks at room temperature, high temperature life do 2000 weeks, of course with the cylindrical battery, high temperature life at least more than 1000 weeks, domestic customers are all can be done.

This is a concrete example, 12 microns, such as you can see from the surface we pack a lot of nanometer powder, after coating of our capacity ratio, the first table the last column, volume ratio is not bad, and the last table of 60 degrees 7 days storage is enough, we only 2.4, conventional materials about inflation by about 10%, ACR is only 0.6, conventional material can reach more than 20%, by coated storage performance has been increased greatly.

, of course, we also do the soft bag full battery, our data retention and 93% 1000 weeks, this is the normal temperature.High temperature is about 800 week reached 98%, make our laboratory level.

This is the customer do level, this is a 44 ampere hour soft package battery, 210 watts/kg, when life can reach more than 2200 weeks, 45 degrees on the domestic many models have been applied.May be some cars, such as Changan auto, Beijing, the original is we do material, SK do batteries, supply Baic, was later other domestic battery factories to take over the business, basically he car is our material.This is 5 microns high ratio of material, the corresponding material is 333, has covered, as I have said vehicle has body doping coated once upon a time, although the feature pack a layer on the surface, like the characteristics of the difference is bigger, in fact do automotive materials must be used body to sintering, to doping coated, every link all around, I always make a example, just like we do porcelain, says PI son not ready, you want to do on glaze porcelain also impossible, no burning inconsistent good porosity, density, glaze will also have a colour or partial have fall off, once upon a time the body to doping, to coating, to work on a material is very important.

We also do the battery, of course, it compared to 333, its capacity is more than a dozen mAh, look to the right of the storage features, its 60 degrees 7 days, inflation is only 1.5%, the growth of NCR is also very small.This test is the customer, is 60 degrees 5 c / 1 c, 800 weeks and more than 90% of the life, and 333 is a level, on the right is the 100% of SOC storage, the bottom right hand corner of figure, black, yellow dots is our when the rise of material science and technology, our material is good in life and storage.

Just spoke to particle pulverizing another way is to do a single crystal, domestic also have a couple of this material, is the standard 523 has, there are 502, 525, because people may be worried about it after a single crystal of capacity ratio will become worse, so adding more cobalt to increase its output, so just can have RefC, is the third sample.

We do the degree of single crystal will be higher, the higher the level, of course, the single crystal, grain is bigger, capacity rate will be lower?We also do a comparison.From 2.9 until 3.5, we can be found this material actually capacity is not low, 169, the capacity is not low, not only can see the green line voltage is our material, and the standard of 523 or more, compared to 5% of the cobalt his capacity and voltage output has advantages, including we compared the, from 0.2 to 2 C, C we voltage output characteristics of the material he is better.45 degrees, of course, this is life, we look at the lower right corner, 3.0-4.4 V, 1 c put life, filling capacity and life of our materials are all show good.

We also do a full battery, full of the house of batteries and other materials, compared to our life and the 525, 502525 materials to slightly better, compared to standard 523, red Mrs. All our advantage is obvious.Single crystal materials, of course, you can see the DCR growth is very small, only 1.4%, 95.8% retention capacity, the capacity of recovery rate reached 100%, so the single crystal materials in storage features, also has the advantage in terms of cycle life.DCR and ratio, and circulation process, the single crystal materials are better some, of course, low temperature.

Just now you talked about 5 e12 at 11:45 and 5 e5, exactly which good?Also do a comparison, for 12 micron is energy type material, type 5 micron is the power of material, the last one single crystal is mainly do energy type, because we can see his compaction density can reach 3.39, the density higher than 12 micron.

We also compare the capacity, you can see, of course, this evaluation conditions, 5 micron single crystal I compaction density higher, of course I use higher compaction density.Capacity, single crystal do much good, capacity can also achieve the same level, this is a voltage contrast, is almost level.Including life, speak just now, the last of his advantage is in store, we do a 60 degrees of storage under 4.2 V, 4.3 V and 60 degrees of storage, compared with those of the material in front of him still has obvious advantages.But do have a single crystal material characteristics, that is, he has a great impact of battery technology, we know that some customers, he says single crystal materials, because of the difference of output as aggregate performance, also someone says is higher than the capacity of single crystal materials, see how to use the material.So we are from the test point of view, at least can achieve the same level, and on the storage features, including security will have more advantages.

Explain the second step of our 622, our 6 a is three years ago, is the domestic first 622 material, in the world is, of course, the second volume of a material, product three years ago today we upgraded, developed 6 e, is a higher capacity, at the same time, we also developed a high voltage 6 eh, of course, there are 6 microns of single crystal hc, compared with 6 a, 6 e overall look difference is not big, but we had the body sintering coated element or even made some adjustments, you can see 6 a and e, compared to 5 mAh capacity increased, including in each magnification is also tested, he was a higher capacity, including our stability test, he will perform better.This is the whole battery of tests, higher than the original 6 a 5 mAh, this is our own initiative to upgrade, at present the material in the domestic some customers batch of users, including party always leading the enterprise, the original we just two days before the tender, batch use.

His life is to keep the same level.The life of what level?This is the SK test data, also said that he used our material can achieve the service life of more than 4000 times, but the use of South Korea's material is 2000 times of life, and we have more advantages in high and low temperature performance, this is what we are doing a 6 e capacity improvement, based on these, we made a high voltage, use a 4.35 V, 4.4 V 622, we can see, the same do with 6 a benchmark, we at 45 degrees, 4.5 V, 1 c, significantly enhance high temperature cycle life.

Tell me the 6 sc of single crystal products, we also were compared and the domestic product, you can see our single crystal degree is better.You can see, capacity and rate, the red line and blue line, above a few mAh, the higher the six mAh, because there are different segmentation model, in the face of different customers.Is this charge and discharge curve, voltage, and can see have obvious advantages, including the cycle life, stability, good.

You now more focus on high nickel material, 811811 has achieved mass production, we are currently and realized the bulk delivery, this is a 12 micron products, contrast is a NCA abroad, you can see the product is spherical degree and density are good, and it is after surface treatment products, he has a capacity of over 205 mAh.We can see this material has a characteristic, his charging voltage is very low, discharge voltage will be higher some, so we must consider when design material his output characteristic, his DCIR problem.His life, of course, on the left is the normal temperature, on the right is the high temperature, the high temperature of 45 degrees's performance is very good.

This is our lab do batteries, 93% of the 1000 weeks, IC, normal life.The material from the point of the evaluation of our customers, the service life of more than 2000 weeks is no problem for certain, so the focus of the ministry of science and technology much starker choices-and graver consequences-in development plan for 1500 weeks at the time, in view of the low carbon negative, I said I won't make the anode material, our goal must be according to the 2500 weeks to 3000 weeks to do, data should be no problem now.

We are also doing NCA, nickel 811 the NCA, cobalt, nickel 15% 80%, about 3% of aluminum, our target is a Japanese NCA products, you can see, we can probably higher than 3 on capacity mAh, the charge and discharge curve, our charging voltage is relatively low, discharge voltage, especially at the end of discharge is very full, very full, draw a big curve down, see the back of the ratio feature is also better, this is life, this is the life of the battery test under 25 degrees, still more obvious advantage, it is 45 degrees, high temperature is also obvious.

So I've been wondering, we are a Japanese material, is Japan's good material to send less than China's, the material we take out from China factory do contrast, we found a survey we have obvious advantages, including the NCA or if this kind of NCA in 811 around 200 mAh nickel, we also do a nickel 88, higher capacity, nickel content is 87.7, the discharge capacity of 213, this is Japan's another kind of material, as you can see our capacity including the overall ratio characteristics or performance better, this is the cycle of 45 degrees is better some performance.

Here to report the progress of high energy density materials we are doing some, really don't like digital batteries, power battery material to require a longer life, our goal, if all square, soft bag is according to the normal life of more than 4000 times, 2000 times more than the high temperature life to design such a goal, of course the storage characteristics, to achieve industry a better level of security features, so we still have confidence, don't lose as much as possible in Japan and South Korea's material, we still have the confidence to do it. Don't believe you can test it. Thank you very much!

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