Chapter 828 The problem of the solid-state battery route

Today, the solid-state energy research and development department of the Titan star department and the mech research and development department are holding a joint meeting.

These days, after Gu Qing stared at the aerospace department for a period of time, he was basically in meetings at other times.

It's not the kind of old lady's foot wrap that the leader said first, then two points, and finally summed up for a long time, but the core meeting of the project that needs to concentrate on brainstorming every time.

Among them are the confidential meeting of the rocket project to seek official lessons, the research meeting of the project required by the moon-chasing starship project, and the meeting held by some confidential laboratories participating through remote means...

Once a person stands at the top of a certain industry, he will be like the tallest tree in this forest, and he needs to experience and accept more influence than other small trees.

What's more, the team led by Gu Qing is no longer one or two top teams in the industry, but a group of...

In the confidential meetings of those external units, the team led by Gu Qing almost always had to be bombarded by various sugar-coated shells before they could leave.

But in this kind of internal meeting, everyone is advancing the project according to the plan, which is fine.

No wonder!

Those who participated in the mech energy project, those with senior qualifications can still hold their breath, while those with junior qualifications are simply devastated and scratching their heads at this time.

"The biggest difference between solid-state batteries and liquid batteries is that there is no liquid electrolyte, and we can directly transition from the current carbon-based negative electrode material to the silicon-based, the ultimate solution - lithium metal, because it can greatly improve the performance of the battery. Energy Density.

Lithium metal, however, requires a solid-state electrolyte that conducts roughly as well as a liquid but resists the formation of lithium dendrites and does not chemically react with metallic lithium.

The Oak Ridge National Laboratory in the United States, the University of Cambridge in Great Britain, and the Xia Ke Academy where I used to work, these Guojia-level research and development forces are all exploring this substance.

Among global technology companies, whether it is Toyota, which makes cars, or Ningde Times and QuantumScape, which are suppliers, they are also tirelessly pursuing this substance. "

Excavated from Xiake Academy, no, no, no, it was a big man from Xiake Academy who was amazed by the speed of Kyushu’s technological research and development, and was impressed by the research and development capabilities. While writing and drawing on the blackboard behind him, he was explaining the difficulties of solid-state batteries.

A triangle is on the blackboard.

△

Professor Qin pointed to this triangle and said with emotion: "In the research and development route of solid-state batteries, there are actually different degrees of differentiation in the world, which is caused by the differences in patents and technological leadership held by everyone.

Neon and Koryo are now promoting the technical route of sulfide materials across the country, while enterprises and R\u0026D departments in Western Europe and North America are taking the route of polymers.

As for our big summer, most of them are taking the oxide route.

Of course, this is not absolute. It just means that the general direction is doing this. In fact, many companies are doing research that is completely different from domestic ones, especially in North America.

They have many companies and many financing channels, so they have enough capital to advance multiple routes, but in recent years, many companies have declared bankruptcy during the meltdown, plunge and abnormal rise of US stocks.

However, due to the outbreak of the financial crisis in recent years, Neon and Korea have sold too many patents, so the current research and development progress has stagnated. "

The old professor's understanding of the industry is much broader and fairer because it is not as focused on returns and benefits as businessmen and investors.

Of course, he also knows that most of the top people sitting here actually have some understanding of the industry, and he just wants to instill this concept in a very small number of management.

This does not refer to Gu Qing, but other people who follow Gu Qing to attend the lecture.

This is also a characteristic of Kyushu Technology Company, that is, the executives who will be responsible for the commercialization of the results of this project in the future must start to learn the professional knowledge of this project after passing the identity review.

Gu Qing will never allow his company to have the kind of top management who only knows how to play power and make money, but does not understand technology.

When Professor Qin was lecturing, Gu Qing, like everyone else, was listening carefully. And some executives behind him who don't understand solid-state battery technology are like college students who are about to take their final exams, or even worse than college students.

College students still have textbooks to draw key points, but they can only take notes by themselves, and even because of meeting requirements, they cannot make video or audio recordings, and they can only ask professors and engineers for advice when they are free after class.

"I personally really appreciate the design ideas of foreign QS companies, that is, no negative electrode design, solid diaphragm of ceramic materials, and multi-layer stacking.

This is why QS was able to attract capital such as Bill Gates and Volkswagen to invest hundreds of millions of dollars before the U.S. stock market fluctuated violently.

To be precise, the design of QS is to cancel the negative electrode structure of graphite or silicon in traditional batteries during manufacturing, and put lithium in the positive electrode of the battery.

When the battery is first charged, lithium leaves the positive electrode and diffuses through the solid electrolyte and plate directly to the thin metal layer on the negative current collector, forming a negative electrode. When the battery is discharged, the lithium diffuses back to the positive electrode, and the battery has no negative electrode at this time. Repeatedly.

This peculiar design idea can have a prospect of realization, mainly relying on QS's proprietary solid-state ceramic diaphragm, which replaces the traditional liquid electrolyte and porous diaphragm, and has good electrical conductivity and can prevent the generation of lithium dendrites.

But after this material was developed, QS faced an unprecedented dilemma, because this material could not achieve the thickness required by solid-state batteries.

Compared with traditional carbon and silicon negative electrodes, lithium metal negative electrodes can achieve higher energy density without increasing the size and weight of the battery pack, which also means longer mileage, while providing high power and long cycle life and higher security.

But what it must do is to be able to be installed commercially, and at the same time be safe enough. For QS, this is obviously not a problem that can be solved in the short term. "

After Professor Qin sighed, some people in the sitting crowd raised their hands.

Professor Qin nodded to this one.

Is a young offspring.

"Professor Qin, hello. I'm He Xu, an engineer in the mecha research and development department."

This young man was quite polite at first, but when he got to the point, he looked very newborn.

"As far as I know, among the three routes of sulfide, oxide and polymer, the ceramic material used by QS belongs to the oxide material system.

The oxide system has many advantages. For example, it has good electrical conductivity and stability, and its ionic conductivity is higher than that of polymers. Its thermal stability can even withstand high temperatures up to 1000 degrees, and its mechanical stability and electrochemical stability are also very good.

but--"