Start as a top student and move towards the stars and the sea

A few minutes later, Lin You met Ning Chen and Song Xiyun.

Ning Chen saw that Lin You's complexion was okay, and it seemed that there was really nothing serious wrong with his body.

Ning Chen thought about where they should go to stay for a while. After all, they had visited the Yanda campus yesterday, and it was very cold outside at night, so they couldn't stay outside all the time.

"How about we go to my place to play cards for a while?" Ning Chen suggested.

Song Xiyun and Lin You glanced at each other and both thought the proposal was a good one.

"Okay, I'm a good card player. I win a lot of money from my family when I play cards every New Year." Lin You said with a smile.

"What a coincidence, sister too."

"Then let's go over there. The place where I live is pretty spacious."

Ning Chen bought a pair of poker cards from a nearby supermarket and brought Lin You and Song Xiyun to the hotel.

Opening the door, Lin You and Song Xiyun were both amazed by the environment inside.

"Ning Chen, your treatment is okay. You can live in such a luxurious room by yourself."

"Yeah, actually just open a standard room. Living in such a big room is a bit wasteful for me."

After taking off his coat, the three of them sat around the coffee table. Ning Chen took out the playing cards and shuffled them.

"The three of us can just fight the landlords. You two must be able to play too, right?"

"Of course."

"Yes, I can play."

"Then let's unify the rules first."

Because the gameplay is somewhat different in different places, in order to prevent disputes in the subsequent game process, the three of them discussed the rules of the game with each other.

"We won't play with money anymore. The losers will have stickers on their faces." Song Xiyun suggested.

"No problem, let's get started."

The three of them are full of confidence in their card skills. They are all the best students in the mathematics department in the country. They can master various skills such as card recording and card pattern reasoning.

Sure enough, when the card game started, all three of them played cards very beautifully, giving the feeling of a professional player competing.

After a few rounds, Ning Chen determined that Lin You and Song Xiyun's poker skills were obviously a level higher than those of Liao Jun and Tong Yicheng.

This feeling of fighting wits and courage is somewhat similar to the pleasure of doing math problems.

But playing cards is not a completely fair game after all. Sometimes one party's cards are particularly good, and others can't do anything about it no matter how they calculate.

Unconsciously, all three people's faces were covered with notes.

At this time, Ning Chen looked at the time and found that it was already ten o'clock in the evening.

"It's ten o'clock so soon? What time does your dormitory close?"

"Normally it's eleven o'clock, but it doesn't matter if it's later. I can ask my roommate to open the door for me."

"The aunt in our dormitory is very nice. She will open the door when we get home late."

Song Xiyun and Lin You both expressed that they were not in a hurry to go back. After all, Ning Chen finally came to Yanjing once, and the three of them were having a great time.

"Well, let's play for another half hour and don't go back too late."

"Okay, let's play for another half hour."

Half an hour passed quickly, and all three of them felt that they still had unfinished business, but the time was up and it was time to go back.

After sending Song Xiyun and Lin You away, Ning Chen felt a little empty in her heart. Ning Chen felt that this should be the emptiness after the happiness ended.

…

After staying in Yanjing for another two days, Ning Chen packed his things and prepared to return to Shengzhou.

In the past two days, Ning Chen met Qiu Chengtong twice more and talked about some issues related to continuing to solve Qiu Chengtong's conjecture, which gave Ning Chen a lot of new gains.

The day before leaving, Ning Chen went to Yan University to visit Song Xiyun and Lin You, and welcomed them to come to Shengzhou to play when they had time, so that he could fulfill his friendship as a landlord.

After completing the check-out procedures, Feng Lan had prepared a car to take Ning Chen to the airport.

After nearly two hours of flight, Ning Chen finally set foot on the familiar land of Shengzhou.

"Although Yanjing is good, Shengzhou is more friendly."

Whether at Shuimu University or Yanjing University, Ning Chen had no sense of belonging. Even after spending three months in the training camp at Shuimu University, Ning Chen still felt that it was just a temporary place to study.

But after returning to Shengzhou University, Ning Chen felt as if he had returned to his own home.

Not caring about rest, Ning Chen came to Xuzhou's laboratory to learn about the latest progress of the experiment.

Seeing Ning Chen coming over, Xu Zhou seemed to be in a good mood.

"Ning Chen, you're back. How was the open class?"

"It's very good. It's really an indescribable feeling to teach so many teachers and students from Shuimu University..."

Listening to Ning Chen's description, Xu Zhou couldn't help but feel a little envious, thinking that one day he would also experience this feeling.

"Teacher Xu, how is the progress of the experiments these days?"

"There have indeed been some breakthroughs in the progress of the experiment in the past few days since you have been away. Well, you can see for yourself."

Ning Chen looked at the experimental data in Xuzhou's computer and his eyes widened.

"Teacher Xu, if you use this new porous silicon-copper composite material as the negative electrode of a lithium battery, can you achieve such a high reversible capacity after 50 cycles?"

Seeing Ning Chen's surprised look, Xu Zhou felt a sense of accomplishment.

"Yes, even after 50 charge and discharge cycles, its reversible capacity still reaches about 900mAh/g. This data is much improved compared to the previous pure porous silicon lithium battery anode."

After redesigning the silicon-based anode material, although the first reversible capacity of lithium batteries dropped a bit, the reversible capacity after multiple cycles increased a lot.

Compared with the original silicon-based negative electrode lithium battery, this result is undoubtedly more exciting.

"Mr. Xu, do you think this lithium battery that uses new porous silicon-copper composite materials as the negative electrode has the ability to enter the application stage now?"

"Judging from the current data, direct application is definitely worse, but this has proved that the direction we previously imagined is completely feasible. We can continue to modify the material composition ratio of this material, or replace it with other of metallic substances and conduct more detailed experiments.”

Obviously, the success of this phase of the experiment has increased Xu Zhou's confidence a lot, which also made Ning Chen more certain of Xu Zhou's professional abilities.

"Teacher Xu, can you give me a copy of the experimental data?"

"Of course, you can do it. You just came back from Yanjing today. You should have a good rest today. You don't have to do experiments."

"Well, then Teacher Xu, I'll come back tomorrow."

Ning Chen didn't want to drag his tired body to do experiments. In addition, Ning Chen also wanted to go back and analyze the experimental data carefully to see if he could draw some valuable conclusions.

Returning to the house in Xiangdu Garden, Ning Chen first took a hot shower to relieve his fatigue and at the same time clear his mind.

Back in the study, Ning Chen turned on the computer and looked at Xuzhou's experimental data these days.

Combining some of the research data on silicon-based anode materials for lithium batteries previously obtained through the system, Ning Chen can determine that they are on the right path.

"Teacher Xu is indeed the best among young experts in materials science. He immediately thought of the right direction to solve this problem."

With the help of these experimental data, Ning Chen completed some of the missing parts of the system data.

But at this time, Ning Chen discovered a new problem.

It is only a negative electrode material that is based on silicon and metal. When the number of charge and discharge cycles is sufficient, the reversible capacity will decrease sharply.

"No...adding metal substances to porous silicon is a correct direction, but it does not solve all problems."

Although the number of cycles of 50 times is relatively high in experiments, in real applications, the number of cycles of lithium batteries needs to reach hundreds or even thousands of times.

Only by experiencing more cycles in the experiment can more problems be exposed.

As for the specific causes of these problems and the corresponding solutions, Ning Chen is still unable to analyze them through incomplete data.

Ning Chen decided to explain his thoughts to Xu Zhou when he went to the laboratory tomorrow.

The next day, Ning Chen came to the laboratory early, only to find that Xu Zhou had already arrived and started his own experiments.

"Hey, Ning Chen, you came so early."

"Teacher Xu, didn't you come earlier than me?"

Xuzhou attaches great importance to this experiment. On the one hand, this is the first multi-million-level horizontal project that Xuzhou has taken on. On the other hand, Xuzhou also wants to prove that his scientific research ability is strong enough through this research. .

"How's it going, Ning Chen, after looking at the experimental data last night, did you find any problems?"

"Teacher Xu, there is nothing wrong with the experiment itself, but I do have some ideas that I would like to discuss with you."