Reshaping life starting from the Junior Class of HKUST

Chapter 276 Your lithium battery is not the same concept as the lithium battery I mentioned

"You don't have to worry about him, it's all about theoretical disputes. We'll talk about it, and we can do our own thing. Besides, more and more people have noticed this situation now. The higher authorities are also deliberately adjusting these things. This It's not a debate, there are many things, and the consequences can only be known in practice, but the price we pay for growing up may be higher." Seeing Wu Zhe's bewildered expression, Dean Qi further explained to him.

Wu Zhe nodded, he knew what Dean Qi said made sense.In this environment, the preciousness of Wang Chao can be better reflected.

"Don't talk about them, talk about your business. What's going on? Why did you bring the Chen family out?" Dean Qi Zhixin asked with a heavy face.

"Dean, it was caused by the trading system that Wang Chao and I have. The Shi family used high interest rates to attract private loans. This hole can no longer be blocked, and the Chen family stands behind them. Although they don't know Chen's No matter how deeply the family is trapped, there must be a connection, and if we are going to move the Shi family, we must include the Chen family." Wu Zhe's voice was calm, without fear at all.

Qi Zhixin has experienced many storms and waves, but he has never seen a boy who can be so calm in the face of such forces.

"Is there no possibility of shaking hands and making peace?"

Wu Zhe shook his head and said: "Their two big thunders can no longer be dismantled. Now they just hide it and don't report it. It's like dominoes, it will have a chain reaction. Now we not only have the trading system in hand, There is also the cash of the second generation across the country. This tens of billions of money is their lifeline. If I don't take the initiative, then when they really move, according to their power, I may not even have the room to fight back. "

Dean Qi nodded, there is no reason to guard against thieves for a thousand days.He stopped persuading and asked instead, "What are you going to do?"

Wu Zhe pondered and said: "I plan to evacuate their liquidity first, and then short their stocks. Then I will expose Lei to him, which will lead to a run on private lenders. I have also negotiated with some investment institutions. Take action to dismantle this [-]-billion-dollar group. As for the Chen family, if it enters the game, there will be several other administrations blocking it. As for whether they will take the opportunity to bring down the Chen family, I don't know. This is not a matter of one level in itself. .”

Wu Zhe still believed in his old dean.So the explanation to Qi Zhixin was more detailed.

"Wu Zhe, I will tell President Chang about your situation. This involves high-level matters. We will not participate, and the University of Science and Technology cannot participate. After this time, don't participate in this kind of thing. A bad thing is a matter of breaking your bones."

Wu Zhe nodded, if it's just him.Probably forget it.But the next target of the family will obviously plot against Wang Chao, so no matter what, Wu Zhe can't stay out of it.

"I just said that Wang Chao can cause trouble. Either you don't cause trouble, or it will be a big event that will shake the world. Now that the matter has come to this point, let's give it a go. I, Qi Zhixin, can't guarantee anything else, but you and Wang Chao I can still save Chao's life at HKUST."

Wu Zhe said gratefully: "Thank you, Dean. I have made you worry again!"

Qi Zhixin waved his hand and said, "Get me something more, it's better than any thanks. Let's go! Let's go to the material science side. I guess that guy Wei Ruyan must be waiting impatiently."

Wu Zhe followed Dean Qi to the Materials Science Department located in the School of Chemistry, HKUST.Wu Zhe is very familiar with this place. The major he chose in his previous life was finally the material major.And Professor Wei Ruyan's name is also like thunder.I have also listened to the courses of this professor in my previous life. He is an authority in the field of energy batteries in our country.

Professor Wei is not tall and thin. He wears an old-fashioned Chinese tunic suit, but his eyes are piercing.

Seeing Qi Zhixin and Wu Zhe come in, the somewhat thin old man stood up happily and said with a smile: "You guys are finally here, if you don't come again, I have to stop you? This is Wu Zhe, right? Hello, I am Wei Ruyan."

"Professor Wei, hello!" Wu Zhe did not dare to neglect, although this one did not enter the Chinese Academy of Sciences.The position in the feasible industry is there.

"Old Wei, I sent you the man. As for how to arrange him, I'm not involved in it. However, Wu Zhe still has a key project. When you use it, please take it easy for me. I But I heard that some of the doctoral students you lead collapsed in the laboratory from exhaustion."

Although Dean Qi hopes that Wu Zhe can do something different in the area of ​​energy, he knows that Wu Zhe is best at pure mathematics, and he doesn't want Wu Zhe to hang himself in the area of ​​materials science.

"What kind of rumors, Wu Zhe, don't listen to their nonsense. When you come to me, you can ask for anything. As long as you can produce results. Now for the lithium battery, to be honest. I am anxious, but I have nothing. progress."

Wu Zhe doesn't know how far domestic lithium batteries have developed.He tentatively asked: "Professor Wei, can you briefly introduce it to me? The situation at home and abroad is fine. You also know that I used to study pure numbers. I have just started to study many things, so it is not very clear. learn."

Wei Ruyan showed a puzzled look to Dean Qi, who doesn't understand anything?You told me that Wu Zhe solved the lithium battery?

Qi Zhixin also patted his forehead, and could only forcefully explain: "Wu Zhe is a genius in general subjects, and he is not a biology major. Isn't he still in charge of the biological gene sequencing project? And this kid even got a super sniper rifle during the holidays." Come out, so you don't have to doubt his research and development capabilities."

After finishing speaking, he glared at Wu Zhe.If you don't get some dry goods out today, kid, you don't even think about passing the test.

Seeing what Dean Qi said, Professor Wei Ruyan accepted his statement.Explained to the two: "Lithium metal batteries were first proposed and studied by Gilbert N. Lewis. In the 70s, MS Whittingham proposed and began to study lithium-ion batteries.

Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries.Li-ion batteries do not contain metallic lithium and are rechargeable.

Lithium metal batteries, the fifth generation of rechargeable batteries, were born in 1996, and their safety, specific capacity, self-discharge rate and performance-price ratio are superior to lithium-ion batteries.Due to their own high technical requirements, only a few countries are producing such lithium metal batteries.For example, small batteries such as pacemakers and mobile phone batteries we use now.As for lithium-ion batteries, there has been no progress.

Due to technical patent issues, although our country has made some progress.But it is very difficult to completely bypass these barriers, so the experiment process is also stuck. "

Wu Zhe was stunned for a moment, this fucking lithium battery has only developed into a lithium metal battery, and now the lithium ion battery has not been fully developed.

But what I am familiar with is the latest lithium-sulfur battery, which is used for cars.Isn't this shooting mosquitoes with a cannon?And he also has a certain understanding of more advanced lithium-air batteries.

How should this be said?You can't let others stop the previous experiments as soon as they come up, and change to your own lithium-sulfur battery!
Scratching his head, Wu Zhe said helplessly, "Professor Wei, can you tell us where we have problems in our research?"

"It's mainly about charging and discharging. There is also the negative electrode material. There is also a problem with the electrolyte inside. There is also the expansion rate of the battery. Well, the voltage can only be controlled at 3.7V, and it cannot reach the international standard. The value of 4.8V above." Speaking of this, Professor Wei also blushed a little.It can be said that this is all a problem to be solved.

Wu Zhe was a little speechless, isn't that the same as saying nothing?
"Well, Professor Wei. I will provide you with the materials. You can try it first. If it works, we will proceed later. To be honest, what I am going to do may not be the same thing as you think. In order for you to support me, I say Yes, let's finish your lithium-ion batteries first, which are still very useful for small electronic devices."

Wei Ruyan froze for a moment, grabbed Wu Zhe with his thin body and said anxiously: "You mean small electronic devices, but do you mean lithium batteries can be used as a large power source?"

Wu Zhe nodded affirmatively: "The kind that can make the car run! When I said it, I thought Dean Qi understood?"

Qi Zhixin also said with an innocent face: "I'm not researching this, I'm researching atomic energy. It's just that when you talk about energy, I habitually pay more attention to it."

"Let's go, go to the laboratory. Let's see how your lithium-ion battery is doing first?" The old man will get anxious even though he is thin and small.Just drag Wu Zhe away.

"Hey, hey! Professor Wei, don't worry! You put me down first, and I won't run away." Wu Zhe didn't dare to struggle, for fear of hurting the old professor.

It was a bit funny for Qi Zhixin to follow behind, seeing Wu Zhe, who had always been calm and unhurried, being dragged away by the thin and small Wei Ruyan.There is an indescribable contrast.

Three people entered the material laboratory, and there are still five or six people working in it.Wu Zhe reckoned that these were master and doctoral students brought by Wei Ruyan.

After entering, everyone also looked curiously at Wu Zhe, a celebrity from the University of Science and Technology.I also secretly thought in my heart: how did this person come to the material research room?He's a math guy to play with materials?
Wei Ruyan let go of Wu Zhe only after entering the laboratory.After clapping his hands to everyone to attract everyone's attention, he said, "Wu Zhe, the baby lump of our University of Science and Technology. You all know each other? Start participating in our project today."

Everyone applauded respectfully, and Wu Zhe greeted with a smile.

"Wu Zhe, first talk about the materials that can be improved. Don't waste time." Wei Ruyan said directly.These questions have plagued his team for a long time.

"The anode materials you use are basically carbon materials, right? Such as artificial graphite, natural graphite, mesocarbon microspheres, petroleum coke, carbon fiber, pyrolytic resin carbon, etc." Wu Zhe asked.He naturally knew that only by using these materials would some of the situations that Professor Wei mentioned appear.

Everyone nodded, these materials can be regarded as common materials in the world.

Because the reaction that occurs on the positive electrode of lithium battery charging is:

LiCoO2=Li(1-x)CoO2+xLi++xe-(electronic)
The reaction that takes place on the charging negative electrode is:
6C+xLi++xe-= LixC6
充电电池总反应：LiCoO2+6C = Li(1-x)CoO2+LixC6
Carbon materials must be used here, which is the theoretical basis for charging and discharging lithium batteries.

"Material for positive electrode: lithium iron phosphate (LFP), for negative electrode: try nano-titanium oxide and nano-silicon oxide," Wu Zhe said lightly.

"Nano-titanium oxide and nano-silicon oxide? Wu Zhe, I understand that lithium iron phosphate is used as the positive electrode material, but for the negative electrode material, we need to synthesize nano-titanium oxide and nano-silicon oxide first. This is not a simple matter." Wei Ruyan murmured .

"You are from the Department of Chemical Materials. Don't tell me that you can't synthesize nano-titanium oxide and nano-silicon oxide." Wu Zhe was a little depressed. Is this knowledge also advanced?If they can't, then I have to teach them step by step.

"That's not true, it's just a little troublesome. Can you explain the principle to me?" Wei Ruyan didn't understand why the negative electrode material should be changed to nano-titanium oxide and nano-silicon oxide.

Wu Zhe breathed a sigh of relief, as long as it can be done. "Actually, the principle of the reaction is the same, but the electrolyte will be different. Let's do it first! After the effect is obtained, you can summarize it yourself."

"What are you still doing in a daze? According to Wu Zhe's words, you can do it! I have to feed this food into your mouths or something?" Wei Ruyan cursed when he saw that his students were standing still.

Seeing that his boss was angry, a group of people hurriedly divided the work and got busy.Those who make cathode materials make cathode materials, and those who make composites make composites.

The scientific research strength of the University of Science and Technology is really not something to talk about. In just half a day, the nano-titanium oxide and nano-silicon oxide that Wu Zhe needed were ready.

During lunch, Wu Zhe, Dean Qi, and Professor Wei had a quick bite outside the laboratory.

At the beginning of the experiment, set up a protection board, which is a device to prevent lithium batteries from exploding. There are three protections on it: the upper limit of charging voltage, the lower limit of discharging voltage, and the upper limit of current.

The first is the charging experiment, and it is easy to come to the standard line of 3.6V.A student reported: "The loss of lithium atoms is only [-]%, whether to increase the overcharge voltage."

Wei Ruyan was overjoyed when he heard that, he would have lost half of his quantity here before.Shouted: "Boost to 4.2v."

"Teacher, the loss of lithium atoms is less than [-]%. The performance is excellent." Another student shouted in surprise.

"Okay, repeat the overvoltage charging experiment." Wei Ruyan said excitedly.You must know that you have never reached the threshold of 4.2v before.

The amount of lithium atoms remaining in the positive electrode material is less than half, and the memory cells will collapse at this time, causing permanent capacity loss in the battery.If continue to charge, because the memory location of negative pole has been filled with lithium atom, follow-up lithium metal can be piled up on negative pole material surface.These lithium atoms will grow dendrites from the surface of the negative electrode toward the direction of lithium ions.These lithium metal crystals will pass through the separator and short-circuit the positive and negative electrodes.Sometimes the battery explodes before the short circuit occurs. This is because during the overcharging process, the electrolyte and other materials will decompose and generate gas, which will cause the battery case or pressure valve to bulge and rupture, allowing oxygen to enter and react with the lithium atoms accumulated on the surface of the negative electrode. explode.

So after using the material proposed by Wu Zhe, it can immediately have such a good performance.Wei Ruyan couldn't help being unhappy.Now he was staring at Wu Zhe, as if he was looking at his own daughter-in-law.

After repeated experiments, it has completely met or even exceeded expectations.Wu Zhe further raised the issue of conductive coatings.

A conductive coating is applied on the surface of aluminum foil, the positive current collector of the lithium battery, and the material is aluminum foil.After coating this material, the conductive coating can effectively improve the adhesion of the pole piece in the lithium battery, reduce the amount of binder used, and at the same time significantly improve the electrical performance of the lithium battery.

So far, it only took Wu Zhe a day to make a traditional small electronic lithium battery in his hands.

(End of this chapter)