Reshaping life starting from the Junior Class of HKUST

Chapter 277 The apparent difficulty is daunting

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

"No problem, the biggest hurdle has been broken, just leave the trivial matters to them." Professor Wei pointed at the students who were still busy.

Dean Qi watched from the side that neither of them mentioned the issue of scientific research affiliation, and interjected: "Old Wei, how is it? You have been troubled by the problem, Wu Zhe can help you in just one day when he comes here, the level is not bad, right?" ?”

"Awesome! I still feel a little unreal. Now what do foreign countries say? I dare say that this technology is definitely at the forefront of the world. The lithium metal batteries they are still using now, our lithium-ion batteries It's all done." Wei Ruyan was still immersed in the joy of technological breakthroughs, and completely didn't understand what Qi Zhixin meant.

Dean Qi could only cough a few times and said: "Old Wei, you see that Wu Zhe has made great contributions. Shouldn't the ownership and patent rights of this scientific research achievement be given to Wu Zhe?"

After Wei Ruyan was stunned for a moment, he reacted and said angrily: "Qiyuan, I, Wei Ruyan, am the kind of person who covets other people's scientific research achievements?"

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

Wu Zhe was grateful to his dean in his heart, and he would not let dean Qi fail to step down.Immediately said: "Let's do it! After all, it was created in the school. How about me and the school's patent being half? Is this not a big deal?"

"No!" "No!" Two voices sounded at the same time.

Dean Qi glanced at Wu Zhe and said: "You are kind, but sometimes good intentions may not be able to do good things. This one did not apply for scientific research funds, and the other did not apply for projects. If you are like you, everything you research at school belongs to the school. , that will cause a brain drain, and no one wants to make scientific research achievements.”

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

Wu Zhe didn't feel at ease about the lithium-ion battery at all.After thinking for a while, he said: "Well, the patent belongs to me. The paper is considered to be a collaboration, you write it, and just give me a corresponding author when the time comes."

Wei Ruyan looked at the students who were busy, but didn't say the words of rejection.These people have worked hard for a long time following him to engage in lithium-ion batteries.With a firm heart, he said: "Wu Zhe, you don't need to worry about the follow-up papers. The first one is still yours, but I hope that the names of those students who helped the experiment can be added later. I will have the cheek to ask for the corresponding authors."

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

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

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

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

"Uh, I've heard of it. This is a conceptual academic issue recently raised." Wei Ruyan is an expert in this field, and he still understands the new concepts 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 technology is mature. You only need to find suitable positive and negative materials. If you can do Come out, the first prize of the National Natural Science Award is yours."

Dean Qi heard that Professor Wei even said such things as the first prize in natural science.Quickly asked: "It's hard? Wasn't Wu Zhe getting that lithium-ion battery very quickly?"

Wei Ruyan rolled his eyes and Dean Qi said: "This is not a thing of the same level. Lithium-ion batteries can only play with small electronic devices. However, the elemental sulfur of lithium-sulfur batteries according to the unit mass is completely changed into S2- what can provide It can be obtained that the theoretical discharge mass specific capacity of sulfur is 1675 mAh/g, and similarly, the theoretical discharge mass specific capacity of elemental lithium is 3860 mAh/g. The theoretical discharge voltage of lithium-sulfur battery is 2.287V, when sulfur When fully reacting with lithium to generate lithium sulfide, the theoretical discharge mass specific energy of the corresponding lithium-sulfur battery is 2600 Wh/kg."

After hearing Wei Ruyan's explanation, Dean Qi clicked his tongue.Although he is not an expert in this field.But basic physics knowledge is totally fine.As soon as Wei Ruyan's data was reported, he knew how important this thing was.

He can not only drive large civilian objects such as cars, but also play a big role in the military industry.

Moreover, the country has just made a guarantee for other countries at the World Environment Conference.It will definitely improve the domestic air quality, and strive to do a good job in reducing emissions and purifying the air.It can be said that the governance of the environment will be the top priority in the future.

If there is a non-polluting power source at this time, the importance is self-evident.The country's dependence on crude oil will also be greatly reduced, which will also have an inestimable effect on diplomatic relations.

"Wu Zhe, give me the number, and I'm a little sure that I can figure it out." Dean Qi asked nervously after trying to understand this.

Well?Wu Zhe can't say that he can do it [-]%!He made a pistol gesture to the two of them.

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

Dean Qi clapped his fists fiercely: "Okay, Wu Zhe, I believe you. I will apply to the Chinese Academy of Sciences and the Ministry for projects and funds, and I will talk to the Chang School in the school. You want people to give and money to give." Money. There is only one goal, get it for me.”

Wei Ruyan is not as confident as Dean Qi, he is a professional in this area.This is like someone telling Qi Zhixin now: I am [-]% sure that I can produce controllable nuclear fusion, and Qi Zhixin may give him a big slap in the face.

"Old Qi, don't get excited. Things are not that simple. Do you know how many difficulties there are? Let me tell you a few difficulties, and you will understand."

After glancing at Wu Zhe, he saw Dean Qi nodded to him, motioning for him to speak.

“第一、单质硫的电子导电性和离子导电性差，硫材料在室温下的电导率极低(5.0×10-30S·cm-1)，反应的最终产物Li2S2和Li2S也是电子绝缘体，不利于电池的高倍率性能
Second, the intermediate discharge products of lithium-sulfur batteries will dissolve into the organic electrolyte, increasing the viscosity of the electrolyte and reducing the ion conductivity.Polysulfide ions can migrate between positive and negative electrodes, resulting in loss of active materials and waste of electrical energy. (Shuttle effect).The dissolved polysulfides will diffuse across the separator to the anode, react with the anode, and destroy the solid electrolyte interfacial film (SEI film) of the anode.

Third, Li2Sn (n=1~2), the final discharge product of the lithium-sulfur battery, is electronically insulated and insoluble in the electrolyte, and deposited on the surface of the conductive framework; part of the lithium sulfide is detached from the conductive framework and cannot be converted into sulfur through a reversible charging process. Or high-order polysulfides, which caused 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 a volume expansion/contraction of up to 79% during charge and discharge. This expansion will lead to changes in the morphology and structure of the positive electrode, resulting in sulfur The detachment from the conductive framework, resulting in capacity attenuation; this volume effect is not significant in button batteries, but in large batteries, the volume effect will be amplified, resulting in significant capacity attenuation, leading to battery damage, and huge volume changes will Destruction of the electrode structure
Fifth, lithium-sulfur batteries use metal lithium as the negative electrode. In addition to the high activity of metal lithium itself, the volume of the metal lithium negative electrode will change during charging and discharging, and it is easy to form dendrites. "

He raised his head and looked at the two of them again, and said: "This means that everyone knows that lithium-sulfur batteries have excellent performance, but they are still in the stage of just proposing the theory. It's not that they don't want to do it, but there are too many problems in it. The five major problems on the bright side are already It's daunting. Not to mention that there are definitely more questions waiting for us in actual experiments."

Wu Zhe smiled and said: "I will find a way to solve it. Taking a step back, these are difficulties, but we will not go up if there are difficulties? If Professor Wei develops them abroad in the future, he will set up technical barriers. Then where will we go? Should we still let them slaughter us, and then we will chase after them hard?"

"Okay, well said!" Professor Wei had no fear at all after seeing Wu Zhewen after hearing so many difficulties.It is also loudly applauded, there are not many young people who dare to show their swords now. "Old Qi, I agree with your opinion, let Wu Zhe be in charge of this research, and I will report it to the higher authorities."

"That's okay, it's too late today. Let's go back first. Wu Zhe, give me the opening report tomorrow. When I finish discussing with Principal Chang, I will go directly to the Beijing Science and Technology Department with him to find the leader." Qi Zhixin saw that Wei Ruyan also supported him, and even more Be firm in your own mind.

"Thank you, Dean, I will write the report as soon as I get back." Wu Zhe said gratefully, as he walked this way.Dean Qi Zhixin has unreserved support for him.

"Wu Zhe, after you set up the project team, I will transfer this group of people in my hands to you. If you have any questions during the experiment, come to me at any time. I will leave the lithium-sulfur battery to you."

Wu Zhe admires Professor Wei's mind. You must know that a mature scientific research team has been given to Wu Zhe.That means that Professor Wei's other research will stop, and this is to support him with all his strength.

Wu Zhe bowed very solemnly to thank him, and promised sonorously and forcefully: "I will definitely live up to your old trust."

Professor Wei Ruyan did not leave the laboratory with Wu Zhe and Qi Zhixin, but started a follow-up experiment on lithium ions with his students.One point faster here can help Wu Zhe earlier.

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

"Let's go out and cook two dishes. I'll treat you to dinner today." Dean Qi is still a little excited.

"Okay!" Wu Zhe didn't want to disturb Qi Zhixin's interest.Anyway, he didn't eat dinner, so he always had to deal with it.

"By the way, ask Wang Chao if he has eaten? If not, let's go together. I just wanted to hear how his inquiry went today?" Qi Zhixin asked as if suddenly remembering.

Wu Zhe picked up the phone and called Wang Chao: "Where is it? Have you had dinner yet?"

Wang Chao's weak voice came from the receiver and said: "Where else can I go? Play a few games in the dormitory. Isn't dinner waiting for you! Lao Zhang called to ask. I refused, always It's not good to bother the teacher's wife."

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

Wu Zhe shook his head and hung up the phone.Still waiting for him to have dinner together?As long as whoever entered the laboratory did not wait for him to eat together, the experiment will be busy, and it is possible not to come out for ten days and a half months.If you want to wait to eat together, you must not starve to death.

Wu Zhe guessed that he was offended.I'm not very interested, so I don't bother to move.

Qi Zhixin and Wu Zhe exchanged views on new energy along the way.Wu Zhe didn't pay attention to many things.He mentioned the matter of lithium batteries with the school, and it was just to explain the issue of the driver's license.

I never thought deeply about the profound impact it would have on society, because in my previous life these things were made abroad first.Technology patents are in the hands of others, and foreign crude oil capital 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, but because of interests, they are not allowed to develop.

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

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

"Okay, don't make it so serious. Just understand it in your heart! You! Everything is fine, but you are too young and mature." Qi Zhixin smiled helplessly.

Wu Zhe smiled awkwardly.You have a high seniority and high academic status, so you can say whatever you want.There is one in the junior courtyard, not to mention the students, but those teachers, who would dare to act presumptuously in front of your boss?
After waiting at the school gate for a while, Wang Chao jogged over.Before the person arrived, he had already shouted: "Azhe, I'm not feeling well today. I'm waiting for you to have a big meal so I can breathe easy."

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

Wang Chao was taken aback, and looked at the speaker.In the winter, I was so scared that I was sweating, why is my dean there?

"Ah this~ ah!" Na Na was speechless.His eyes glanced at Wu Zhe.

The meaning is obvious: what is going on with this old Qi here?You didn't make it clear on your phone number, you are sincerely cheating on your buddy, right?
Wu Zhe joked with a smile: "Wang Chao, you have a mouthful of Fula! Dean Qi treats you today, but you are trying your best to slaughter it?"

Wang Chao's face was dark, and he quickly said to the dean with righteous words: "Dean, don't listen to Azhehu, I have always been hardworking and simple. I can eat whatever I want at night. If you always say to eat noodles, I don't like it." Opinion."

"Hehe, everyone says that you, Wang Chao, are the most energetic one in the Junior Court. Well, I think it's okay, you are better than Wu Zhe. To reward you today, you can choose the place you want. Don't worry, I, the dean, will invite you for a meal. You can afford it, just order it." Qi Zhixin said with a smile beside him.

From what Wang Chao said just now, he could hear that Wang Chao had been wronged.As the dean, I failed to give him a head start, and I also wanted to treat him to a good meal to make up for it.

"Then I won't be polite! Come with me." Wang Chao is not as submissive as ordinary people, and he has a bit of a generous personality.This time I will hear that Dean Qi really told him to order, so he will not hit the snake with the stick.

This area, when it comes to 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 master of wronging himself, so he can go without saying about eating.So as long as there are delicious and interesting places near HKUST, you can ask him.

(End of this chapter)