Chapter 830: Some Research? (4K)

"But the disadvantages of oxides are also very obvious. Compared with sulfides, the conductivity of oxides is still too low, which leads to the fact that the performance release of solid-state batteries using oxide system materials cannot meet the needs of our mecha project.

And a series of problems such as capacity and rate performance cannot be solved at all due to the limitations of material properties.

In addition, there is an unavoidable technical problem, that is, the materials of the oxide system are very hard, which leads to the problem of "solid-solid contact" in solid-state batteries cannot be properly solved.

This is a defect that cannot be ignored for combat equipment such as mechas and small aircraft that require high maneuverability and stability."

What is a newborn calf not afraid of a tiger?

This is it.

As a new engineer in the mecha R&D department, He Xu has almost no qualifications in front of Professor Qin in terms of qualifications.

But he dared to directly refute the professor's research route.

And he is not aimless. The solid-state battery industry does seem to be thriving, as if there are new discoveries every day, but due to material problems, there is really no storage material that is both safe and can guarantee high-power output energy.

As for the "solid-solid contact" problem of oxide solid-state batteries raised by He Xu, it is indeed a long-standing problem in the industry.

The oxide particles exist in the form of point contact. Under simple room temperature cold pressing conditions, the all-solid-state battery made of oxide will be a battery with a very high porosity.

In liquid batteries, all pores are infiltrated with electrolyte, so there is no problem with interface contact, but in solid-state batteries, these pores cannot conduct lithium.

These core problems lead to the strongest form of solid-state batteries. All-solid-state batteries cannot be dominated by oxide materials.

Professor Qin did not get angry with this young man. He nodded and admitted that the problems raised by He Xu could not be properly solved. Then he said: "At present, the research frontier at home and abroad is still moving towards solid-liquid mixing, that is, it is necessary to use both solid electrolyte layers of oxides and electrolyte infiltration, so that the pores can be filled and it can have a perfect lithium-conducting channel.

And if we take this route, after we have phased commercial or practical results, we can upgrade the factory and manufacture it in a short time.

Some things you are still young and don't know much about. Here I can reveal to you a reason for taking this route. That is, our four leading solid-state battery companies in China, Yanjing Weilan, Su Qingtao, Ningbo Fengli, and Ryukyu Province Huineng, are currently taking the route of solid-liquid mixing technology based on oxide materials.

We Jiuzhou Technology has achieved brilliant results in using semiconductor technology to lead the collective upgrading of Daxia's semiconductor industry. Once our solid-state battery technology can be commercialized on a large scale and is reliable enough, it will definitely set off a wave of reform in Daxia's energy storage industry in a short time!"

Professor Qin, who has been over a century, was excited when he said this.

Faced with this kind of scientific research veteran who has devoted his entire life to the industry and hopes that Daxia can reach the peak in the energy storage industry, the young He Xu also has his own persistence.

He argued: "But the current problem is that we must complete the real solid-state battery in the short term! The mecha project cannot wait, the starship project cannot wait, and many other projects cannot wait!

I know that the team you led brought a lot of patents when they entered the company, but we can't just sit on the old capital and look forward!"

In fact, He Xu said this for some reasons.

In the eyes of the older generation of scientific researchers, the mecha project is just a toy project.

Let these big guys devote their energy to the energy storage equipment of the mecha project? That's equivalent to asking top engineers to design toy cars for kindergarten kids.

Give them a face and let you use the patent.

The progress of solid-state batteries has accelerated recently, but it is because the super-large project of aerospace has many requirements.

But this is one of the conflicts between the young and the old.

Old conservatives are more willing to spend time on strategy and overall planning. This has a high success rate, but it requires patience.

Young people are like the sun, the sun that rises in the morning. They know that they need to be as scorching as the sun at noon. They are unwilling to wait too long, even if they know that this waiting is correct.

But most people really don't want to wait that long, and the longer the time, the more unexpected changes are likely to occur.

For example, the bizarre deaths of a bunch of energy executives in the bear in recent years, and the increasingly turbulent international situation.

More and more engineers and scientists are getting anxious. They want to advance the projects in their hands as soon as possible, and then proceed to the next one, and then the next one, until they are completely safe before they put down their anxious hands.

As for how to realize pure solid-state batteries, Gu Qing, who was sitting below, actually had a rough blueprint in his mind.

It's just that he can't just be a pioneer in this kind of thing. It's best to have an opportunity to put forward the idea, then correct the direction of this big project, and then scientifically divide it into small projects, and then put these engineers and scientists into the positions they should be in, one by one, and take care of them.

And he could sit quietly in the back among the patent signatories and major project reports, looking at his children dazzling the world with a look of satisfaction like an "old father".

After taking a quick look at the recent research and development logs of Professor Qin and He Xu, Gu Qing stood up.

At this time, the solemn atmosphere in the conference room also changed because of Gu's actions.

Without exception, everyone focused their attention on him.

As soon as Gu Qing stood up, he felt so many eyes on him, but he was not timid. He said to the two people who were arguing: "You two, don't argue in useless places. Every technical discussion and advancement on energy is useful." , and the company attaches equal importance to energy projects and mecha projects.

Modern industry cannot do without energy, and the mecha project is not just for entertainment and special operations needs. "

After Professor Qin and Engineer He Xu met their eyes, they paused for two seconds, then looked at Gu Qing in unison and nodded.

What Mr. Gu said does make sense.

After the two of them calmed down a little, Gu Qing came out and said to everyone: "The mass production of safe all-solid-state batteries has always faced many difficulties, but the semi-solid batteries mentioned by Professor Qin are compatible with existing liquid batteries. Process equipment and materials can be mass-produced at a lower cost, which is a basic condition for market application.

After more than ten years of rapid development, our colleagues in Daxia have significantly reduced the cost of liquid lithium-ion batteries, while the energy density continues to increase. Now the solid-state batteries produced by Daxia companies have become the mainstream of the global automotive power battery market. product.

But at the same time, new energy vehicles and equipment equipped with liquid lithium-ion batteries have become more prone to fire and explosion accidents in recent years.

Our engineer once told me that the explosive power of a 18650 model lithium battery is no less than that of a small hand grenade, and the reason why it does not cause as much damage as a small hand grenade is simply because it is restrained by a steel shell.

The two biggest reasons why we develop solid-state batteries are that they are very safe, and their energy storage and discharge performance can be of the highest quality. I have read the recent reports on several of our projects, and I can clearly see that the current research and development situation is far from this. There is still some distance between the two goals.

And even if they are not commercial products, just laboratory products, they are not the kind that can be mass-produced by developing a comprehensive product. "

Gu Qing said this to all the people in charge of the solid-state battery project.

Although his tone was somewhat harsh, no one dared to speak against him.

In recent years, Jiuzhou Technology has produced solid-state batteries, but to be precise, they are solid-liquid hybrid products, and the manufacturing cost is much higher than those of major manufacturers manufacturing batteries with the same performance, so they are just pseudo-mass production.

Many members and teams of the solid-state battery project team in the energy storage department have relied on the exaggerated resource investment and R&D equipment within Jiuzhou Technology to produce some products that look good in terms of data under ideal conditions in the laboratory.

However, without exception, those products are not feasible for commercial and special use. They are "flowers in the greenhouse" and cannot be taken out for viewing at all.

Gu Qing walked onto the podium, and Professor Qin naturally gave up his position as the lecturer.

Clicking on the temples of the glasses, using the projection of the SR1 glasses, and using the void gesture to drag the file to the blackboard behind him, Gu formally faced the crowd and spoke about his thoughts.

“I think that solid-liquid hybrid is not a transitional technology for these companies, and it can even be said that it is indeed a type of solid-state battery, but this is for those companies that cannot adopt all-solid-state battery technology.

I personally understand the thoughts of these companies. After all, liquid lithium batteries have gone through decades of research and development and production before finally forming a cathode material system composed of ternary/lithium iron phosphate, and the negative electrode is iterative to silicon-based.

But in terms of the theories put forward in the first generation of these products, these companies’ decades of research and development are still standing still and have not surpassed the first generation theories.

At present, the energy density of liquid lithium-ion batteries has reached 300Wh/kg, which is almost reaching a theoretical limit. The next step or next generation of batteries must develop solid-state batteries.

When a research laboratory of our Jiuzhou Technology Titanium Star Department was developing some equipment and materials for carbon-based semiconductors a few years ago, there was a material that might allow all-solid-state batteries to completely replace the electrolyte and separator while allowing positive and negative Extremely active materials will also maintain the original material system. "

As soon as Gu Qing said these words, many people who were still sitting immediately stood up.

Even Professor Qin, who had just walked down and sat down, stood up energetically and looked at him.

Among the people present were the old man from the Xia Academy of Sciences, the master of the Xia Institute of High Energy, and a group of Ph.D.s who were in no way inferior to foreign elites in scientific research.

At this moment, they all held their breath and stared at Gu Qing's mouth, trying to use their eyes to pry out from Gu Qing's mouth what they had been pursuing for years and decades.

Anhetang, who had just returned to work for a day, was already familiar with this scene, but still subconsciously became nervous.

Because the looks in the eyes of these scientific madmen made him a little scared.

Gu Qing didn't give in. He clicked on the file, and the SR1 glasses verified the scleral password before decrypting the file.

"This document is quite large. It contains not only the analysis of solid-state batteries, but also speculation and preliminary research on projects in the battery field such as fuel cells and power batteries."

[A high-performance ASC is designed by using polyaniline-loaded graphene-wrapped polyester fibers as flexible electrodes and bacterial cellulose (BC) nanofiber-reinforced polyacrylamide as a hydrogel electrolyte. It combines arbitrarily deformable textile electrodes with BC-reinforced hydrogels with high ionic conductivity (125 mS cm-1), high tensile strength (330 kPa) and superelasticity (stretchability up to ≈1300%), resulting in a device with high stability/compatibility between electrodes and electrolytes. It may be possible to rely on the effective design of sufficiently strong energy storage devices to allow solid-state batteries to show great potential in real wearable application environments! ]

[The negative electrode material of the solid-state battery may be a mixed negative electrode of nano-silicon and graphite, and the positive electrode may be lithium manganese oxide or a lithium-rich manganese-based material, or a positive electrode material that does not contain lithium. Then the electrolyte is a solid electrolyte, and its energy density can be 300-450Wh/kg. Then the next generation is a lithium-sulfur battery or a lithium-air battery in the long term.

【For example, the positive electrode material for developing high-energy-density all-solid-state or solid-liquid hybrid batteries is still high-nickel ternary, the negative electrode material is still graphite or silicon carbon, copper platinum and aluminum platinum are still used for positive and negative levels, and the roll-to-roll process and battery assembly process will not change much. 】

【Through rare earth ion doping and rare earth ion coating of electrode materials, the electrode material structure is stabilized, the electronic conductivity and ion diffusion of electrode materials are improved, and the electrochemical properties of electrode materials can be effectively improved. The electronegativity and ion size of rare earth ions are key factors in regulating the performance of electrode materials for lithium-ion batteries and supercapacitors. 】

……

"What is said above is right! If a multi-layer honeycomb three-dimensional complex porous structure is made. These gaps are used as the deposition space for metal lithium, graphene materials with excellent support strength can be used to ensure that the negative electrode material is not crushed during assembly."

"Lao Li, you think too superficially. This three-dimensional porous structure similar to a honeycomb can effectively solve the problem of spatial changes in metal lithium batteries during the charge and discharge cycle, while preventing separation and disconnection between different material layers of the negative electrode."

"Yes, yes, yes, the excellent structure can give full play to the characteristics of the material, and at the same time make the material The material has a better environment, right, right, and there is more than one structural conjecture? They actually thought of this structure? Wait, turn it slowly! "

"Mr. Gu! Stop! Wait a minute!"

"It's almost done, I think it's OK, no!!! Wait a minute!!!"

"Mr. Gu, just turn one more page forward!"

A group of people are like refugees who have been starving and thirsty in the desert for several days, and even quench their thirst with urine. Suddenly, they see a full banquet and a pile of iced watermelons, fruits, and cold drinks. Their eyes are no longer green, but greedy desires for endless desires.

Even those old men who have been watching the industry for many years in Xia Ke Institute, almost took out the old notebooks in their pockets at the same time, and took notes scribbled by looking at the materials.

PS: There are more than a hundred words of formulas and values, and only a few dozen words of valid figures--