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Chapter 254 Carbon Nanotubes
"Mr. Wang, is the company you're talking about making carbon nanotubes?" Guo Yuan asked.

"Yes, they have several good related patents in their hands."

"Tell me about the specific situation of this company!"

"This company was established on the basis of a laboratory for researching carbon nanotubes, and the company's boss and senior management are all from this laboratory.

They set up companies just to make money to facilitate their continued research.

But recently they heard that a Zero one battery that has mastered the technology of large-scale production of semi-solid lithium batteries is going to build a factory in China, so they want to expand their scale and see if they can go online with Zero one battery.

Boss, don’t worry, I’ve evaluated it. Even if they can’t connect with Zero one battery, we won’t lose money if we invest. Their company’s carbon nanotubes are still very good, and they don’t have to worry about sales. "

After listening to Wang Hui's words, Guo Yuan's expression was a bit strange. He didn't expect that the news of Zero One's battery factory construction would reach the ears of these industry insiders so quickly.

"What is the valuation of their company?" Guo Yuan asked, suppressing all kinds of complicated emotions in his heart.

"The current valuation is about [-] million. Although they have a few good patents, there are still many domestic manufacturers of carbon nanotubes, and their advantages are not too great."

"We can invest, but at least we must get a veto!" Guo Yuan thought for a while and made a decision.

"Okay, I'll talk about it as you want later."

In fact, Guo Yuan is still very interested in the manufacture of carbon nanotubes.

He had thought about whether to acquire a similar company and become the downstream industry of Zero one battery.

Now that there is a company that delivers to the door, it will save him trouble.

"By the way, what kind of process does Mr. Wang's company use to manufacture carbon nanotubes?" Guo Yuan asked.

"It's catalytic pyrolysis." Wang Hui replied without hesitation.

After speaking, Wang Hui looked at Guo Yuan in surprise. He didn't expect that Guo Yuan really knew something about carbon nanotubes.

And Guo Yuan nodded after listening to Wang Hui's technique.

Guo Yuan remembers that in the information given by 01, there are many kinds of processes for manufacturing carbon nanotubes, the most common of which are graphite arc method, laser evaporation method and catalytic pyrolysis method.

The single-walled carbon nanotubes produced by laser evaporation are of the highest quality, but due to the high complexity of the equipment involved and the many influencing factors, its yield is the lowest.

The graphite arc method is the most primitive manufacturing method. Not only is the output low, the quality is also poor, and the cost is high, so there is no need to consider it at all.

The catalytic pyrolysis method is the most advanced of the three methods, the lowest output cost, and the easiest to achieve mass production.

Its essence is to generate carbon nanotubes on the surface of the catalyst by decomposing carbon atoms when the gas containing carbon flows over the surface of the catalyst nanoparticles.

If it is further subdivided, the catalytic pyrolysis method is divided into the matrix method and the floating method according to the different ways of catalyst existence.

But no matter which method, gas flow, reaction temperature and catalyst type must be strictly controlled.

There are too many messy little details here, and every little detail can apply for a corresponding patent.

Once there is a little breakthrough, you can apply for a corresponding patent.

After all, these variables that need to be controlled are not static, but need to be controlled in real time with a complete set of dynamic models.

The process of outputting a dynamic model is a process of continuous trial and error.

This company has several corresponding patents in its hands, which shows that they should be very serious about scientific research and technology.

"Boss, if we can successfully invest, should we help them get in touch with the Zero One battery?

After all, lithium batteries account for a large proportion of carbon nanotube applications at this stage, and this company also wants to expand production in order to get online with Zero one batteries. "Wang Hui said.

Guo Yuan nodded when he heard the words. As Wang Hui said, carbon nanotubes have a great effect on lithium batteries. The most direct thing is that they can improve the conductivity of the positive and negative electrodes.

Conductive agent is the key auxiliary material of lithium battery, and its main function is to improve the conductivity of positive and negative electrodes.

Poor electrical conductivity is common in the cathode active materials of lithium batteries, which leads to high electrode internal resistance and insufficient discharge depth, which in turn leads to low utilization of active materials and large residual capacity of electrodes.

The conductive agent plays an important role in it, first of all, it can increase the transmission rate of electrons in the electrode and improve the conductivity.

Secondly, the infiltration of the pole piece to the electrolyte is improved, the migration rate of lithium ions is increased, and the charging and discharging efficiency and service life of the electrode are improved.

The last and most critical point is to build a good conductive network and improve conductivity when the volume of the positive electrode material changes during charging and discharging.

At present, the mainstream conductive agents are carbon black, carbon nanotubes, conductive graphite, VGCF (vapour-grown carbon fiber) and graphene.

The Zero one battery has always used carbon nanotubes.

This is because carbon nanotube products iterate quickly, and the performance and profitability of different generations vary significantly.

It just so happens that the Zero one battery is also in a stage of rapid development and needs a conductive agent with matching performance.

And with the continuous iteration of carbon nanotubes, its penetration rate in conductive agents is also steadily increasing.

Compared with traditional conductive agents, carbon nanotubes and graphene conductive agents have the characteristics of better conductivity and less dosage.

Compared with carbon black, conductive graphite and VGCF as traditional conductive agents, it forms a point, surface or line contact conductive network between active materials.

在用量方面，导电剂的添加量取决于不同电池生产商的电化学体系，一般为正极或负极重量的1%-3%，碳纳米管导电剂的粉体使用量仅为传统导电剂的1/6-1/2。

From the information given by 01, the differences in the preparation methods of carbon nanotubes between generations are mainly reflected in the catalyst formulation and macro-preparation methods.

High-generation products have thinner pipe diameters, longer lengths, and better electrical conductivity and mechanical properties.

At present, carbon nanotube products in the world are roughly divided into four generations, and each generation of products corresponds to different catalyst formulations and different subdivided application fields.

The time interval between the launch of each generation of products is 2-3 years, the price difference is significant, and the cost difference is small.

This fast iterative product is also an important foundation for the high profitability of carbon nanotubes.

With so many obvious advantages, Zero one battery will definitely choose carbon nanotubes.

And 01 used carbon nanotubes when conducting experimental simulations.

Switching to other conductive agents does not necessarily have the same effect.

As a layman, Li Cheng naturally did not dare to modify the experiment without authorization.

Thinking of this, Guo Yuan decided to call Li Cheng after returning home at night. On the one hand, he asked him about the construction of the factory, and on the other hand, he asked if he had a regular supplier of carbon nanotubes. If not, It must be that the fat and water will not flow into the fields of outsiders.

(End of this chapter)