"Professor Wei, I won't participate in the battery life and physical properties experiments in the future." Wu Zhe didn't want to waste any more time in this experiment, so he directly threw the follow-up verification experiment to Professor Wei.

"No problem, this biggest hurdle has been solved, just leave those little things to them." Professor Wei pointed to the students who were still busy.

Dean Qi watched from the side that neither of them talked about the question of scientific research ownership, and interjected next to him: "Old Wei, how is it?" You've been having a headache, Wu Zhe came over and helped you get it in just one day, the level is okay, right? ”

"Awesome! It still feels a little unreal to me. What do you say about foreign countries now? I dare say that this technology is absolutely at the forefront of the world. The lithium metal batteries they are still using now, our lithium-ion batteries have been made. Wei Ruyan was still immersed in the joy of technological breakthroughs, and he didn't understand what Qi Zhixin meant at all.

Dean Qi could only cough lightly a few times and said, "Lao Wei, you see that Wu Zhe has made great contributions, should the ownership and patent rights of this scientific research achievement be given to Wu Zhe?" ”

Wei Ruyan was stunned for a moment, then reacted and said angrily: "Qi Yuan, I, Wei Ruyan, am the kind of person who covets the scientific research results of others? ”

Dean Qi laughed and said, "Of course you are not this kind of person. It's just that I'm the dean, so of course I have to mention it to my students. ”

Wu Zhe was grateful to Dean Qi in his heart, and he would not let Dean Qi fail to step down. Immediately said: "So be it! After all, I got it at school, so how about me and the school's patent being half and a half? Isn't that a big deal? ”

"No way!" "No way!" Two voices rang out at the same time.

Dean Qi glanced at Wu Zhe and said, "You are kind, but sometimes kindness may not be able to do good things." This one did not apply for scientific research funds, and the second did not apply for a project. If you want to be like you, everything you research in school will go to the school, which will lead to a brain drain and no one wants to work on scientific research results. ”

Wei Ruyan also nodded beside him, he also meant the same.

Wu Zhe is not very confident about this lithium-ion battery at all. After thinking for a while, he said, "In this way, the patent belongs to me." The paper is considered to be a collaborative work, you can write it, and give me a corresponding author at that time. ”

Wei Ruyan looked at the students who were busy, and didn't say anything about refusal. These people have been working hard for a long time to follow him to engage in lithium-ion batteries. He said ruthlessly: "Wu Zhe, you don't have to worry about the follow-up papers. It's still you, but I hope to add the names of those students who helped the experiment, and I'll be cheeky to ask for the corresponding author. ”

Wu Zhe still wanted to refuse, but Dean Qi pulled Wu Zhe down. directly replied, "Okay, Lao Wei." Just do as you say. ”

Then he changed the topic and said: "Wu Zhe, tell me what your so-called lithium battery is." It can be used as a power source for a car. ”

Hearing Dean Qi's question, Wei Ruyan also diverted his attention and waited for Wu Zhe's explanation.

"Professor Wei, have you ever heard of lithium-sulfur batteries?" Wu Zhe didn't rush to explain, but asked rhetorically.

"Well, I've heard of that. This is a conceptual academic question that has recently been raised. Wei Ruyan is an expert in this area, and he still understands the new concept in the latest direction of lithium batteries.

"The lithium battery I'm talking about is a lithium-sulfur battery."

Hearing Wu Zhe's words, Wei Ruyan frowned: "Wu Zhe, do you know how many difficulties there are to overcome?" This is not like a lithium-ion battery, the process is mature, as long as you find the right cathode and anode materials. If you can do this, the first prize of the National Natural Science Award will be yours. ”

Dean Qi heard Professor Wei even say the first prize in natural sciences. Busy asked, "It's hard?" Wasn't it very fast for Wu Zhe to get that lithium-ion battery just now? ”

Wei Ruyan rolled his eyes and said to Dean Qi: "This is not a one-level thing, that lithium-ion battery can only play with small electronic devices." The theoretical discharge mass specific capacity of sulfur is 1675 mAh/g according to the amount of electricity provided by the unit mass of elemental sulfur completely converted to S2-, and the theoretical discharge mass specific capacity of elemental lithium is 3860 mAh/g. The theoretical discharge voltage of a lithium-sulfur battery is 2.287V, when the sulfur completely reacts with lithium to form lithium sulfide. The theoretical discharge mass specific energy of the corresponding lithium-sulfur battery is 2600 Wh/kg. ”

After listening to Wei Ruyan's explanation, Dean Qi was also smacked. He is not an expert in this field though. But basic physics knowledge is no problem. As soon as Wei Ruyan's data came out, he knew how important this thing was.

It can not only drive large civilian objects such as automobiles, but also play a great role in the military industry.

And the country has just been at the World Environment Assembly, and it has made a package ticket to other countries. We will definitely improve the air quality in the country and strive to reduce emissions and clean the air. It can be said that the next step will be to improve the environment.

At this time, if there is a power source that is not polluting, the importance is self-evident. The country's dependence on crude oil will also be greatly reduced, which will also have an immeasurable effect on foreign relations.

"Wu Zhe, give me a number, I can figure it out with some certainty." After thinking about this, Dean Qi asked a little nervously.

Belch? Wu Zhe can't say that he can do it 100%! He gestured to the two of them with a pistol.

"Eighty percent!" Dean Qi and Professor Wei shouted in unison.

Dean Qi slapped his fist high-five: "Okay, Wu Zhe, I believe in you." I will apply for projects and funds from the Chinese Academy of Sciences and the ministry, and I will talk to the regular school in the school, you want people to give people, and you want money to give money. There's only one goal, to get it out for me. ”

Wei Ruyan is not as confident as Dean Qi, he is professional in doing this. This is just like someone saying to Qi Zhixin now: I am eighty percent sure that I can make controlled nuclear fusion, and it is estimated that Qi Zhixin can give him a big slap in the face.

"Old Qi, don't get excited. It's not that simple. Do you know how many difficulties there are? I'll talk about a few difficult points, and you'll understand. ”

After glancing at Wu Zhe, he saw Dean Qi nodding at him and motioned for him to speak.

"First, the electronic conductivity and ionic conductivity of elemental sulfur are poor, the conductivity of sulfur materials at room temperature is extremely low (5.0×10-30S·cm-1), and the final products of the reaction, Li2S2 and Li2S, are also electronic insulators, which are not conducive to the high rate performance of the battery

Second, the intermediate discharge products of lithium-sulfur batteries will dissolve into the organic electrolyte, increasing the viscosity of the electrolyte and reducing the ionic conductivity. Polysulfide ions can migrate between the positive and negative electrodes, resulting in the loss of active material and the waste of electrical energy. (Shuttle Effect). The dissolved polysulfides diffuse across the diaphragm to the negative electrode, where they react with the negative electrode and destroy the solid electrolyte interfacial membrane (SEI membrane) of the negative electrode.

Third, the final discharge product of lithium-sulfur battery, Li2Sn (n=1~2), is electronically insulated and insoluble in the electrolyte, and is deposited on the surface of the conductive framework; Part of the lithium sulfide detached from the conductive framework and could not react into sulfur or high-order polysulfides through the reversible charging process, resulting in a great attenuation of capacity.

Fourth, the densities of sulfur and lithium sulfide are 2.07 and 1.66 g·cm-3, respectively, and there is up to 79% volume expansion/contraction during charging and discharging, which will lead to changes in the shape and structure of the cathode, resulting in the separation of sulfur from the conductive framework, resulting in the attenuation of capacity; This volume effect is not significant under coin cell cells, but in large cells the volume effect is amplified, resulting in significant capacity attenuation, resulting in damage to the battery, and a huge volume change will destroy the electrode structure

Fifth, lithium-sulfur batteries use lithium metal as the anode, in addition to the high activity of lithium metal itself, the volume of lithium metal anode will change during the charging and discharging process, and it is easy to form dendrites. ”

He looked up at the two of them and said, "This means that everyone knows that lithium-sulfur batteries have excellent performance, but they are still in the stage where they have just put forward their theories." It's not that I don't want to do it, it's that there are too many problems. The five major problems on the bright side are already daunting. Not to mention that there are definitely more questions waiting for us in real experiments. ”

Wu Zhe smiled and said: "I will have a way to solve it, take a step back, these are difficulties, but if there are difficulties, we will not go up?" If Professor Wei comes out abroad in the future, he will set up technical barriers. So where do we go from here? Or are you still left to their slaughter, and then we are chasing after us? ”

"Well, well said!" Professor Wei saw that after hearing so many difficulties from Wu Zhewen, he had no fear at all. is also loudly applauded, there are not many young people who dare to show their swords now. "Lao Qi, I agree with you, let Wu Zhe take charge of this research, and I will also reflect it to the above."

"Okay, it's late today. Let's go back first. Tomorrow Wu Zhe, you will report to me the opening topic, and after I finish discussing with President Chang, I will go directly to the Ministry of Science and Technology in Beijing with him to find the leader. Qi Zhixin saw that Wei Ruyan also supported it, and he was even more firm in his thoughts.

"Thank you, Dean, I'll write a report as soon as I get back." Wu Zhe said gratefully, he has come all the way. Dean Qi Zhixin can be described as unreserved support for him.

"Wu Zhe, after you set up the project team. I'll transfer this group of people in my hands to you. If you have any questions in the experiment, feel free to come to me, and the lithium-sulfur battery will be left to you. ”

Wu Zhe admires Professor Wei's mind, and you must know that a mature scientific research team has been given to Wu Zhe. That means that Professor Wei's other research is going to stop, and this is doing his best to support him.

Wu Zhe bowed very solemnly and thanked him, and assured him sonorously: "I will live up to your trust." ”

Professor Wei Ruyan did not leave the laboratory with Wu Zhe and Qi Zhixin, but started a follow-up experiment on lithium ion with his students. If you can get a little faster here, you can go over to help Wu Zhe earlier.

Wu Zhe and Dean Qi stepped out of the materials laboratory, and the street lights on the campus were already on.

"Let's go, go outside and stir-fry two dishes. Today I treat you to dinner. "Dean Qi is still a little excited.

"Good!" Wu Zhe didn't want to disturb Qi Zhixin's interest. He didn't eat dinner anyway, so he always had to deal with a bite.

"By the way, you ask Wang Chao if he has eaten it? If you don't, let's go together. I just wanted to hear how his inquiry was today? Qi Zhixin seemed to suddenly remember.

Wu Zhe picked up the phone and dialed Wang Chao: "Where?" Have you had dinner? ”

Wang Chao's weak voice came from the earpiece: "Where else can I go?" Play a few games in the dormitory. Dinner isn't waiting for you! Lao Zhang called to ask. I refused, and it's not good to always trouble my wife. ”

"Then you come down now and go to the school gate. Waiting for you there. ”

Wu Zhe shook his head and hung up the phone. Still waiting for him to have dinner with him? As long as whoever enters the laboratory doesn't wait for him to eat together, the experiment has to be busy, and it is possible that it will not come out for ten days and a half. Wait to eat together, and you won't starve to death.

Wu Zhe estimated that he was angry. The interest is not high, so I am too lazy to move.

Qi Zhixin and Wu Zhe exchanged views on new energy along the way. There are many things that Wu Zhe has never paid attention to. He and the school mentioned lithium batteries, just to have an explanation for the driver's license issue.

I never thought deeply about what far-reaching impact it would have on society, because in my previous life, these things were first made out from abroad. Technology patents are in the hands of others, and those crude oil capital abroad will naturally not bow to new energy. The result is that we want to develop new energy, but the technology is in the hands of others. And others have it, and they don't let it develop because of interests.

"Wu Zhe, you must pay attention to this research, it is much more important than you build a gun! I see how come you yourself are still ignorant, don't understand anything? Qi Zhixin saw that Wu Zhe was a little distracted, and emphasized again.

Book of Hundred Leagues

"Well, I will, please rest assured Dean. I didn't expect it to have such a big impact on society. Wu Zhe also solemnly assured.

"Alright, don't take it so seriously. Just know it in your heart! You! Anything is good, but too young and old. Qi Zhixin smiled a little helplessly.

Wu Zhe smiled awkwardly. You have a high seniority and a high academic status, so you can say anything. There is one in the young academy, not to mention the students, but those teachers, who dares to be presumptuous in front of your old man?

After waiting at the school gate, Wang Chao trotted over all the way. Before the person arrived, he had already shouted: "Ah Zhe, Lao Tzu is not in a good mood today." I'm waiting for you to have a big meal to breathe a sigh of. ”

"Oh! Wang Chao, what kind of meal do you want to eat? Today is my treat. Before Wu Zhe could speak, Dean Qi next to him said with a smile.

Wang Chao was stunned for a moment and looked at the person who spoke. I'm so scared that I'm sweating in the winter, why is my dean here?

"Ahh I couldn't speak. His eyes glanced at Wu Zhe.

The meaning is obvious: what is going on with this old Qi here? You don't make the phone clear, sincerity buddy, right?

Wu Zhe smiled and quipped: "Wang Chao, you have a mouthful!" Dean Qi has a treat today, are you trying to kill it? ”

Wang Chao's face was dark, and he hurriedly and sternly Qi said to the dean: "Dean, don't listen to Ah Zhe's nonsense, I have always paid attention to hardship and simplicity. You can eat anything at night, and I don't have a problem with you always saying that you want to eat noodles. ”

"Hehe, it is said that you Wang Chao is the most energetic one in the Shaoyuan, well, I think it's okay, you are stronger than Wu Zhe. Today, in order to treat you, you can choose the place. Don't worry, I, the dean, can afford a meal, you can order it. Qi Zhixin said with a smile next to him.

From Wang Chao's words just now, he heard that Wang Chao was wronged. As the dean, I couldn't give him a head, and I also thought about inviting him to a good meal and compensating for it.

"Then you're welcome! Come with me. "Wang Chao is not as submissive as ordinary people, and he has a bit of a mixed character. This will listen to Dean Qi really ask him to order, then don't hit the snake with the stick.

This piece, if you want to talk about food, no one in the entire University of Science and Technology dares to say that it is more familiar than Wang Chao. He has never been the one who has wronged himself, and he doesn't need to say anything about eating. So as long as there is good food and fun near the University of Science and Technology, it is right to ask him.