Technology: breaking the hegemony that monopolizes the world

"However, the shortcomings of oxides are also very obvious. Compared with sulfides, the conductivity of oxides is still too low, which leads to the use of solid-state batteries using oxide system materials. Their performance release cannot meet the requirements of our mecha project. need.

Moreover, a series of problems such as capacity and rate performance cannot be solved due to the limitation of material properties.

In addition, there is an unavoidable technical problem, that is, the substances in the oxide system are very hard, which leads to the inability to properly solve the problem of "solid-solid contact" in solid-state batteries.

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

What does it mean that newborn calves are not afraid of tigers?

That's it.

As a new engineer in the mecha research and development 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 line.

And he is not aimless. The industry of solid-state batteries does seem to be thriving. It seems that there are new discoveries every day. However, due to material issues, there is really no safe storage material that can guarantee high-power output energy. .

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

Oxide particles exist in the form of point contacts. In the case of simple room temperature cold pressing, an all-solid-state battery made of oxide will be a battery with a very high porosity.

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

These core issues lead to the strongest form of solid-state batteries, and it is impossible for all-solid-state batteries to be dominated by oxide materials.

Professor Qin was not angry with this newborn calf. He first nodded and admitted that these problems raised by He Xu could not be properly resolved, and then said: "At present, the frontiers of scientific research at home and abroad are still moving in the direction of solid-liquid mixing. That is to say, it is necessary to use the solid electrolyte layer of the oxide and infiltrate it with the electrolyte, so that the pores can be filled and it has a good lithium-conducting channel.

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

You are still young and don’t know much about some things. 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, Suzhou Qingtao, Ningbo Fengli, and Liuqiu. Provincial Huineng, they are currently taking the route of solid-liquid mixing technology based on oxide materials.

Our Kyushu Technology has used semiconductor technology to lead the collective upgrade of Daxia’s semiconductor industry. Once our solid-state battery technology is commercially available on a large scale and is reliable enough, it will definitely set off a boom in Daxia’s energy storage industry in a short period of time. Reform wave! "

Professor Qin, who had already passed the first six years, had a passionate expression 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 newborn He Xu also has his own persistence.

He reasoned and said: "But the current problem is that we must complete the real solid-state battery in a short period of time! The mecha project cannot wait, the starship project cannot wait, and there are many projects that cannot wait!

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

In fact, there are some reasons why He Xu said this.

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

Let these big guys devote energy to the energy storage equipment of the mecha project? That's the equivalent of having a top engineer design a toy car for a kindergarten kid.

Give a face and let you use the patent.

Recently, the progress of solid-state batteries has been accelerated, which is because of the high requirements of aerospace, a super-large project.

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

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

And young people are the scorching sun, the rising sun in the morning. They know that they need to go to the scorching sun at noon. They don't want to wait too long, even if they know that the waiting is correct.

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

For example, the bizarre deaths of Mao Xiong's group of energy executives in recent years, such as the increasingly turbulent international situation.

More and more engineers and scientists are becoming anxious. They want to advance the project in hand as soon as possible, and then move on to the next one, and then the next one. They will not let go of their anxious hands until it is completely safe.

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

It's just that this kind of thing can't just let him be a pioneer. It's best to need an opportunity to put forward an idea, then correct the direction of this big project, and then divide it scientifically into small projects, and then a new one. Carrots stuffed these engineers and scientists into the positions they should put, and made overall plans.

On the other hand, I can sit safely behind the group of patent signers and major project reports, and look at my "old father" gratifiedly watching my own calves dazzle the world.

After briefly looking at Professor Qin and He Xu's recent R\u0026D log, Gu Qing stood up.

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

Without exception, everyone turned their attention to him.

Gu Qing felt the gazes of so many eyes when he was standing together, but he was not timid. He said to the two people who were arguing: "Don't quarrel in useless places, every technical discussion and advancement about energy is useful. , and the company attaches equal importance to energy projects and mecha projects.

Modern industry is inseparable from energy, and mecha projects are not just for entertainment and special operations needs. "

After meeting eyes, Professor Qin and engineer He Xu paused for two seconds, then looked at Gu Qing in unison and nodded.

What Mr. Gu said is indeed reasonable.

After the two people's emotions eased a little, Gu Qing came out and said to everyone: "The mass production of safe all-solid-state batteries has always faced many difficulties, and 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 the basic condition for market applications.

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

But at the same time, fire and explosion accidents of new energy vehicles and equipment loaded with liquid lithium-ion batteries have also begun to occur frequently in recent years.

Our engineer once told me that an 18650 lithium battery can explode as powerfully as a small grenade, and the reason why it does not cause as much damage as a small grenade is only because it is restrained by a steel shell.

The two biggest reasons for our research and development of 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 of our projects, and I can clearly see that the current research and development situation is far from this. There is still a distance between the two goals.

And even if it is not a commercial product, it is just a laboratory product, and they are not the kind that can be mass-produced after a well-rounded product can be developed. "

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

Although his tone was harsh, no one dared to contradict him.

In recent years, Kyushu Technology has produced solid-state batteries, but to be precise, they are solid-liquid mixed products, and the manufacturing cost is much higher than that of batteries with the same performance produced by large factories, so it is only a pseudo-mass production.

However, many members and teams of the solid-state battery project team in the energy storage department rely on the exaggerated resource investment and R\u0026D equipment within Kyushu Technology, and have produced some products that look good in terms of data under ideal conditions in the laboratory.

But without exception, those products are not feasible for commercial and special use, and they belong to "flowers in the greenhouse", which cannot be taken out to see at all.

When Gu Qing stepped onto the podium, Professor Qin gave up the position of the speaker very naturally.

Clicking on the temple of the glasses, through the projection of the SR1 glasses, and using the void gesture to drag the file to the blackboard behind him, Gu officially faced the crowd and talked about his thoughts.

"I think that solid-liquid mixing 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 go through the all-solid-state battery technology.

I personally understand the thinking of these companies very well. After all, liquid lithium batteries have been developed and produced for decades before finally forming a situation where the positive electrode material system is composed of ternary/lithium iron phosphate, and the negative electrode is iterated to a silicon base.

However, in terms of the theories proposed in the first generation of these products, decades of research and development by these companies are still standing still, and have not surpassed the original theory.

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 battery must develop solid-state batteries.

And when a research laboratory of our Kyushu Science and Technology Titan Star Department developed 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 diaphragm while allowing positive and negative Extremely active materials will also maintain the original material system. "

As soon as Gu Qing's words came out, many people who were still sitting immediately stood up instantly.

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

Among the crowd present were the old man of Xia Ke Academy, the Da Da Da Da Xia Institute of High Energy, and a group of doctors who were not inferior to foreign elites in scientific research.

At this moment, they all held their breath by coincidence, staring at Gu Qing's mouth, trying to pry out from Gu Qing's mouth what they have been chasing for years or decades.

An Hetang, who had just returned to his post for a day, was already familiar with this scene, but subconsciously became tense.

Because of the eyes of these scientific research madmen, he was a little scared.

Gu Qing didn't play tricks, he clicked on the file, and the SR1 glasses verified the sclera password before decrypting the file.

"This document is a bit large, and it includes not only the research and analysis of solid-state batteries, but also the speculation and pre-research of projects in the battery field such as fuel cells and power batteries."

High-performance ASCs are designed by using polyaniline-loaded graphene-wrapped polyester fibers as flexible electrodes and bacterial cellulose (BC) nanofiber-reinforced polyacrylamide as hydrogel electrolytes. 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%). Together, resulting in devices with high stability/compatibility between electrodes and electrolytes, may be able to rely on the efficient design of sufficiently robust energy storage devices, allowing solid-state batteries to show great potential in the context of truly wearable applications ! 】

[The negative electrode material of solid-state batteries may be a mixed negative electrode of nano-silicon and graphite, and the positive electrode may be lithium manganate or lithium-rich manganese-based materials, 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 the long-term lithium-sulfur battery or lithium-air battery.

[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, etc., copper-platinum and aluminum-platinum are still used for the positive and negative stages, and the roll-to-roll process and The battery assembly process will still not change much. 】

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

...

"This is right! If you make a multi-layer honeycomb three-dimensional complex porous structure. Use these gaps as the deposition space for metal lithium, and you can use graphene materials with excellent scaffold strength to ensure that the negative electrode material will not be compressed during assembly. bad."

"Lao Li, you think it's too obvious. This honeycomb-like three-dimensional porous structure can effectively solve the problem of spatial variation of metal lithium batteries during charge and discharge cycles, and at the same time prevent separation and disconnection between different material layers of the negative electrode."

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

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

"It's almost done, it's almost done, I think it's ok, no!!! Wait a little longer!!!"

"Mr. Gu, just turn to the front one more page!"

A group of people seemed to be starving and thirsty for several days in the desert, and even the refugees who quenched their thirst with urine suddenly saw a full feast of Chinese and Han people, a pile of iced watermelons and fruits, and cold drinks. Their eyes were no longer green, but A voracious desire for infinity.

Even those elders who have sat and watched the industry for many years at the Xia Ke Academy almost simultaneously took out the old notebooks in their pockets at the same time, and scribbled down the notes while looking at the information.

PS: There are more than 100 words in formulas and values, but only a few dozen effective figures--