Great Country Academician

Peng Hongxi stayed in Shanghai for three days, and did not return to the capital until the preliminary test results of the new lead-free nanocomposite reconstituted nuclear protection material were completed.

Xu Chuan also went to the capital with him.

At the same time, two copies of different protective materials were taken away, as well as the preliminary test results for the two materials.

On the one hand, it is to make a report on these phased results. On the other hand, it is to discuss the Nobel Prize in a month.

It is now November, and in less than a month, the Nobel Prize award ceremony will begin.

Although the Nobel Prize award ceremony is held in Europe, not in the United States, it is relatively safer.

But given his current age, going abroad is no longer his business alone.

So he had to go to the high-level to discuss and see how to deal with it.

When I came to the capital again, I stayed in the hotel next to the Forbidden City.

After leaving the luggage at the hotel, Zheng Hai drove Xu Chuan to the office building where the science and technology department is located.

When I came to the capital this time, I didn't meet that person last time.

A staged result, there is no need to alarm that person.

Maybe he knows, but as he has more important things in his hands than this, it is enough to be able to support the work of scientific researchers behind the scenes.

"Professor Xu, welcome!"

Under the office building of the science and technology department, the head of the department, Qin Anguo, greeted Xu Chuan in person, with two elderly people standing beside him.

"Chief Qin, we meet again." Xu Chuan responded with a smile.

"Come, come, let me introduce you, these two are academicians of our National Academy of Sciences." Qin Anguo smiled and stepped aside to introduce the two old people beside Xu Chuan.

"This is Academician Wang Zhongwang, a well-known scholar in the field of international nuclear energy, and a top scholar in advanced nuclear energy systems with inherent safety features. The high-temperature gas-cooled reactor technology and circulating cooling water system of domestic nuclear power plants are all from him."

"This is Academician Jiang Shengjie Jiang, our country's nuclear industry meritorious service, participated in the development of two bombs, guided the development of nuclear power plants and supporting nuclear fuel safety cycle systems, and made great contributions to our country's nuclear safety."

Hearing this, Xu Chuan straightened his expression, and greeted the two old people respectfully: "Hello, Academician Wang, and Academician Jiang."

Wang Zhong shook hands with him, and said with a smile, "Heroes are young, and I've heard of Professor Xu's name a long time ago. When I saw him today, I'm younger than I imagined."

Xu Chuan smiled and said: "Old Wang is too famous. Compared with you, I am still far behind."

On the side, Jiang Shengjie stepped forward and asked directly, "I heard from Mr. Qin Shizhang that you have developed a new type of anti-nuclear radiation material?"

Xu Chuan nodded and said, "It is true that a new type of material has been produced, but at present, only some preliminary tests have been done, and the final results have not yet been fully determined."

"Did you bring any materials?" Academician Jiang Shengjie followed up and asked, "Or can I go to your place to have a look?"

On the side, Qin Anguo explained: "Academician Jiang and Academician Wang are working together on a national nuclear energy safety project recently, which requires the use of some nuclear energy protection technologies and materials, and some traditional nuclear protection materials cannot match."

"Professor Xu, it's inconvenient if you don't know. If it's convenient, after the results on your side come out, you can apply for some materials for internal use. Do you think it's okay?"

Xu Chuan nodded suddenly, and said, "It's not inconvenient. I'll have the relevant materials sent by the Shanghai Research Institute."

"It's just that this new material has not been tested yet, and I can't guarantee its stability and effect."

Jiang Shengjie's anxious face calmed down, and he put on a smile: "Then trouble Professor Xu, I will do the relevant tests here, and I won't let you get into trouble."

Xu Chuan nodded. The nuclear energy beta radiation energy concentration conversion project is a wholly state-funded project, and the intellectual property rights of any achievements are also owned by the state.

It is a normal thing to take from the country and use it for the country.

As for the trouble, he wasn't worried.

In domestic academic circles, there are very few who can trouble him.

The group of four exchanged pleasantries at the door for a while, and then, led by Qin Anguo, entered the building of the Science and Technology Building.

In the office, Xu Chuan took the tea from his assistant and put it on the table beside him.

"Chief Qin, I am here this time mainly for two things."

He didn't waste time either, and directly got to the point. After all, both parties are busy people and don't have much time to chat.

On the opposite side, after hearing this, Qin Anguo sat up straight and said seriously, "Say it."

"The first one is about the nuclear energy beta radiation energy concentration conversion project. At present, the nuclear energy project has entered the formal stage, and the results of the first phase have been produced."

"The next research, whether in terms of scientific research funds or experimental materials, needs support."

Qin Anguo nodded, and said: "There is no problem with these. Don't worry, the country will definitely support the nuclear energy beta radiation energy concentration conversion project."

He didn't ask how much money or help Xu Chuan needed, and he agreed directly.

This is not only the great reputation brought by the Nobel Prize not long ago, but also because the nuclear energy beta radiation energy concentration conversion project has produced phased results.

Whether it is the 'crystalline erbium zirconate' material or the follow-up lead-free nanocomposite reconstruction protection material, it is of extremely high value.

For the first batch of billions of dollars invested, any one of these two materials is enough to withstand the investment.

In addition, and more importantly, the person who applied for these things was Xu Chuan.

The name is enough.

The world's first double winner of the Nobel Prize and the Fields Medal. He is only 21 years old. A series of achievements in solving the seven millennium problems are enough for any country to invest heavily in him. Supported.

On the side, Xu Chuan continued: "The second thing is about the Nobel Prize."

"Nobel Prize?" Qin Anguo looked at Xu Chuan with some doubts.

Xu Chuan nodded, and said: "Although it is a very happy thing to win the Nobel Prize, its award ceremony is abroad, and now I am in charge of a nuclear energy project, so I don't know whether I should go out to accept the award. "

"If you go, how will you ensure safety? Not long ago, the inexplicable death of an Iranian nuclear physics expert is believed to be known to Mr. Qin."

He directly opened his mouth to clarify the matter, and asked if the higher-ups should go to accept the award.

A Nobel Prize in Physics is still very important to him today, or Hua Guo.

Now that you have obtained it, there is no reason not to take it back.

But considering some other things, security needs to be guaranteed.

Hearing this, Qin Anguo showed a puzzled smile on his face: "Don't worry about this, the country has already considered it, and the security issue is not a problem, and someone will protect you when the time comes."

"And we are not Iran. No one dares to play tricks on internationally renowned scholars like you."

"Unless they want to start a war directly!"

After a pause, he continued: "Of course, safety is not a trivial matter. If it is not safe to fly in and out, we actually have another plan here."

"What plan?" Xu Chuan asked curiously.

"Train!" Qin Anguo spat out two words.

"From the capital to Cosmo, there is a dedicated train line that can go directly to Europe. Although it takes a little longer, it is safer than an airplane and it is easier to deal with various emergencies."

"This is a backup plan. If you don't mind wasting some time, Professor Xu, we can take the train. It's safer."

Hearing this, Xu Chuan suddenly nodded. He heard that this train seems to be able to go directly from the capital to Cosmo. It is a tourist train, and the scenery along the way is very beautiful.

Compared with traveling by plane, the train is indeed safer.

Even if there is an accident during the journey, it is still on the ground.

It's not like an airplane flying in the sky, if something goes wrong, it's going to be a problem every day.

Xu Chuan also relaxed a lot after settling the follow-up funding development of the nuclear energy project and the Nobel Prize.

After staying in the capital for two days, talking with academicians Wang Zhong and Jiang Shengjie about the safety protection of nuclear energy projects, and visiting his younger sister Xu Xiao at Shuimu University, he returned to Jinling.

Both the 'crystalline erbium zirconate' material and the lead-free nanocomposite reconstruction protection material have entered the test, and the work of the Institute of Nuclear Energy has come to an end.

Others went to work normally to solve follow-up matters, while Xu Chuan went to the "Chuanhai Materials Research Institute" he bought.

After neglecting this side for more than a month, it is time to see how the research and development progress of the electrolyte and artificial SEI film is.

Although the staffing of Chuanhai Materials Research Institute is like that of Nuclear Energy Research Institute, the difficulty and complexity of research and development of lithium battery materials is not as high as that of nuclear radiation protection materials.

And with the theories and pointers he left before, the progress of research and development should not be too bad.

Finding Fan Pengyue in the laboratory, Xu Chuan asked about the development of the two projects.

"The research and development speed of the electrolyte is faster than that of the artificial SEI film. After all, it is much simpler than the artificial SEI film."

"There is already a preliminary finished product, and it is currently being tested. If there is no problem in the test, it can be assembled into a complete lithium battery for charging and discharging experiments."

"As for the research and development of the artificial SEI film, it may take a while, and the exact time is uncertain. There is a problem with the research and development here, and I am trying to solve it. I am about to send you an email to tell you about it."

In the office, Fan Pengyue made a brief report on the progress of the project during this period.

"What's going on?"

Hearing that there was a problem in the research and development of the artificial SEI film, Xu Chuan asked in surprise.

Logically speaking, as long as he provided detailed routes and methods, research and development should go all the way without hindrance.

Fan Pengyue: "Researcher Yu Zhen produced a finished SEI thin film some time ago, but unfortunately, the performance of this SEI thin film did not meet your previous requirements."

"The inspection test found that although this artificial SEI film can avoid the formation of lithium dendrites, it cannot completely dispel the accumulation of lithium ions in the negative electrode."

"In theory, it does solve the problem of lithium dendrites. After all, lithium dendrites will no longer form, but in fact, because of the superposition of lithium ions on the negative electrode, it will also cause a decrease in Coulombic efficiency and eventually lead to battery necrosis."

"What about the test results? Let me see."

Xu Chuan is very interested in the artificial SEI film produced by Yu Zhen.

Although he doesn't have much research on lithium batteries, he can analyze various problems in lithium batteries from the perspective of materials science and mathematics.

This is something that most material scientists cannot do because they do not have such a deep mathematical foundation.

"Wait a minute, I'll print a copy right now."

Fan Pengyue responded and left in a hurry, but after a while, he rushed back with a document.

Xu Chuan took the printing paper that was still warm, smelled the fragrance of ink on it, and flipped through it.

From the data recorded above and from the test results, in a sense, this artificial SEI film has indeed solved the problem of lithium dendrites.

However, the problem of lithium analysis and lithium accumulation has not yet been solved.

The so-called lithium analysis is related to the operation of lithium batteries.

When the lithium-ion battery is charging, Li+ will be deintercalated from the positive electrode and intercalated into the negative electrode;

However, when some abnormal conditions occur, such as insufficient lithium intercalation space in the negative electrode, too much resistance to Li+ intercalation in the negative electrode, Li+ deintercalation from the positive electrode too quickly but unable to intercalate in the negative electrode in the same amount, Li+ cannot be inserted into the negative electrode.

At this time, Li+ can only obtain electrons on the surface of the negative electrode, thus forming a silver-white metallic lithium element, which is often referred to as lithium analysis.

Lithium dendrite is actually a kind of lithium analysis.

However, when too many lithium ions gather at the negative electrode to form lithium, it not only degrades the battery performance and greatly shortens the cycle life, but also limits the fast charging capacity of the battery, and may cause catastrophic consequences such as combustion and explosion.

In addition, it will cause excessive consumption of lithium ions in the electrolyte, resulting in lower and lower Coulombic efficiency.

In layman's terms, the capacity of lithium-ion batteries decays exponentially.

If the Coulombic efficiency per cycle of the battery is 99%, then after 100 cycles, its capacity retention rate is 36.6%.

That is to say, a 100Ah battery only has a capacity of 36.6Ah after 100 cycles in this case.

The information in his hand shows that the effect of lithium analysis is particularly serious.

As a result, the Coulombic efficiency of the assembled battery is only about 99.91%.

This number already sounds pretty good. But it's actually not that high.

Take the most famous cell phone battery as an example. Most normal batteries operate under normal conditions. When the number of charging cycles reaches 500, the battery can maintain up to 80% of its initial capacity.

That is to say, the battery cycle is 500 cycles, the capacity retention rate is 80%, and the Coulomb efficiency is about 99.96%.

It is a full 0.05 percentage points lower, which means that if this artificial SEI film is applied, the problem of lithium dendrites is solved, but the charge and discharge times of the battery will be reduced by more than two hundred times.

Solving the problem of lithium dendrites can indeed increase the battery capacity.

But it's not worth it to drastically reduce battery life as a result.