Peng Hongxi stayed in the magic capital for three days, waiting until the preliminary test results of the new lead-free nanocomposite reconstructed nuclear protective materials were completed before returning to the capital.

Also going to the capital with Xu Chuan was Xu Chuan.

Two different protective materials were taken away at the same time, as well as the preliminary test results for both materials.

On the one hand, it is to make a report on these phased results. On the other hand, I will negotiate the Nobel Prize in a month's time.

It's already November, and in less than a month, the Nobel Prize ceremony will begin.

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

But with his current age and achievements, going abroad is no longer his thing.

So he had to go to the top and talk to the top to see what to do.

.....

When I came to the capital again, the place where I stayed was still the hotel next to the Forbidden City.

After dropping his luggage at the hotel, Zheng Hai drove Xu Chuan to the office building where the Ministry of Science and Technology was located.

This time I came to the capital, not to meet the person last time.

A phased achievement, there is no need to alarm that person.

Maybe he knows, but as a person, there are more important things in his hands than this, and it is enough to support the work of scientific researchers behind him.

"Professor Xu, welcome!"

Under the office building of the Ministry of Science and Technology, Minister Qin Anguo personally greeted Xu Chuan, and two old men stood beside him.

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

"Come on, come on, let me introduce you, these two are academicians of our National Academy of Sciences." Qin Anguo smiled and stepped aside and introduced the two old men 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 characteristics, and 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, a meritorious member of our country's nuclear industry, who has 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 looked upright and greeted the two old men respectfully: "Academician Wang is good, Academician Jiang is good." ”

Wang Zhong shook hands with him and said with a smile: "The hero is a young man, I have heard of Professor Xu's name for a long time, and when I see it today, I am even younger than I imagined." ”

Xu Chuan said with a smile: "Elder Wang is too famous, compared to you, I am still far behind." ”

On the side, Jiang Shengjie stepped forward and asked directly without politeness: "I heard Minister Qin say 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 made, but at present, only some preliminary tests have been done, and the final result has not yet been completely decided." ”

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

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

"Professor Xu, you don't know if it's inconvenient here, if it's convenient, after the results of your side come out, the Ministry of Science and Technology will 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 just ask the Demon Capital Research Institute to mail some of the relevant materials." ”

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

Jiang Shengjie's anxious face soothed, and he smiled: "Then trouble Professor Xu, I will do the relevant tests here, and I won't let you be in trouble." ”

Xu Chuan nodded, the nuclear energy β radiation energy gathering and conversion project is a wholly funded project of the state, and its intellectual property rights also belong to the state.

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

As for what to trouble with, he is not worried.

In the domestic academic circles, there are few people who can make trouble for him.

......

The group of four people greeted each other at the door for a while, and under the leadership of Qin Anguo, they entered the building of the Ministry of Science and Technology.

In the office, Xu Chuan took the tea handed over by the assistant and put it on the table beside him.

"Minister Qin, I came here this time mainly for two things."

He didn't waste time and went straight to the point, after all, both sides were busy people and didn't have so much time to chat.

On the other side, after hearing this, Qin Anguo sat up straight and said seriously: "You say." ”

"The first one is related to the nuclear energy β radiation energy aggregation and conversion project, and now the nuclear energy project has entered the formalization and the results of the first phase have been made."

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

Qin Anguo nodded and said, "These are all right, you can rest assured, the country will definitely support the nuclear energy β radiation energy gathering and conversion project." ”

He didn't even ask Xu Chuan how much money he needed and what kind of help, and he directly agreed.

This is not only the great fame brought by the Nobel Prize not long ago, but also because of the phased results of the nuclear energy β radiation energy aggregation and conversion project.

Whether it is a 'crystalline erbium zirconate' material or a subsequent lead-free nanocomposite reconstructed protective material, it is of great value.

The first batch of billions of capital investment, any of these two materials, is enough to withstand the investment.

In addition, the more critical thing is that the person who applied for these things was Xu Chuan.

The name, that's enough.

The world's first Nobel Prize and Fields Medal winner, only 21 years old, the solution of the seven millennial problems...... A series of achievements, put in any country, is enough for that country to invest heavily in support.

......

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

"Nobel Prize?" Qin Anguo glanced at Xu Chuan with a little puzzlement.

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 control of a nuclear energy project, I don't know if I should go out to receive the award." ”

"If you go, how can you guarantee security. Not long ago, Yin Lang's nuclear energy physics expert died inexplicably, and I believe Minister Qin also knows something. ”

He directly opened his mouth to pick out the matter and asked if the above should go to claim the award.

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

Now that you've got it, there's no reason not to get it back.

But there are a few other things that need to be done in terms of security.

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

"And we are not Yin Lang, no one dares to do anything to an internationally renowned scholar 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 enter and exit by plane, we actually have another plan on our side." ”

"What's the plan?" Xu Chuan asked curiously.

"Train!" Qin Anguo spat out two words in his mouth.

"There is a dedicated train line from the capital to Cosmo, which can go directly to Europe, although it takes longer, but it is safer than a plane and it is easier to face all kinds of emergencies."

"It's a backup plan, if Professor Xu doesn't mind wasting some time, we can take the train there. Safer. ”

】

Hearing this, Xu Chuan nodded suddenly, he heard that this train, it seems that it can go directly from the capital to Cosmo, it is a tourist train, and the scenery along the way is very good.

Trains are safer than airplanes.

Even if there was an accident along the way, it was on the ground.

Unlike airplanes flying in the sky, if something goes wrong, it is that the heavens should not be called the earth.

......

After solving the two things of follow-up funding development of nuclear energy projects and the Nobel Prize, Xu Chuan also relaxed a lot.

After spending two days in the capital, exchanging views with Wang Zhong and Jiang Shengjie about the safety of the nuclear energy project, and going to Shuimu University to see his sister Xu Xiao, he returned to Jinling.

The 'crystalline erbium zirconate' material and the lead-free nanocomposite reconstructed protective material have been tested, and the work on the side of the Nuclear Energy Research Institute has come to an end for the time being.

The others went to work normally to solve the follow-up matters, and Xu Chuan went to the 'Chuanhai Materials Research Institute' that he bought.

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

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

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

Finding Fan Pengyue in the laboratory, Xu Chuan inquired about the research and development of the two projects.

"The development speed of electrolyte, such as artificial SEI film, is faster, after all, it is much simpler than artificial SEI film."

"At present, there is a preliminary finished product, and it is currently being tested, and if the test is no problem, it can be assembled on a complete lithium battery for charging and discharging experiments."

"As for the research and development of artificial SEI film, it may take some time, the specific time is uncertain, there is something wrong with the research and development here, and we are trying to find a way to solve it. I was 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 time.

"What's wrong?"

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

It stands to reason that when he provides a detailed route and method, R&D should be unimpeded.

Fan Pengyue: "Some time ago, researcher Yu Zhen came up with a finished SEI film, but unfortunately, the performance of this SEI 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 disperse the accumulation of lithium ions at the negative electrode."

"Theoretically, 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 at the negative electrode, it will also cause the coulomb efficiency to be reduced, and eventually lead to the necrosis of the battery......"

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

Xu Chuan was very interested in the artificial SEI film that Yu Zhen made.

Although he does not 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 materials scientists can't do because they don't have that much math to do.

"Wait a minute, I'll print a copy of it."

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 ink on it and flipped through it.

Judging from the data recorded above, and from the test results, in a sense, this artificial SEI film does solve the lithium dendrite problem.

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

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

When the lithium-ion battery is charged, the Li+ will be de-embedded from the positive electrode and embedded in the negative;

However, when some abnormal situations occur, such as insufficient space for lithium intercalation in the negative electrode, too much resistance for Li+ to embed the negative electrode, and Li+ is too quickly de-intercalated from the positive electrode but cannot be embedded in the negative electrode with the same amount, Li+ cannot be embedded in the negative electrode.

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

Lithium dendrites are actually a type of lithium precipitation.

When too many lithium ions accumulate at the negative electrode to form lithium precipitation, it not only reduces the performance of the battery, 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, the lithium ions in the electrolyte are excessively consumed, resulting in lower and lower coulomb efficiency.

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

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

That is to say, a 100ah battery in this case is only 36.6ah capacity left after 100 cycles.

And the information in his hand shows that the effect of lithium separation is particularly serious.

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

That's a good number. But it's actually not that high.

Take the battery of the most famous mobile phone as an example, most normal batteries operate under normal conditions, and 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 cycles for 500 cycles, and the capacity retention rate is 80%, which translates to a coulomb efficiency of about 99.96%.

This is a full 0.05 percentage points lower, which means that if this artificial SEI film is applied, the lithium dendrite problem is solved, but the battery will be charged and discharged more than 200 times.

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

But it's not worth it to drastically reduce the life of the battery.

.......