Add Bookmark | Recommend this book | Back to the book page | My bookshelf | Mobile Reading

Free Web Novel,Novel online - All in oicq.net -> Sci-fi -> Reborn in 1999  Unleashing the Era of Black Techno

Text Chapter 114 You have to believe in science (please recommend)

Previous page        Return to Catalog        Next page

    As soon as Chen Xiao spoke, everyone was startled, and then they all looked over.

    "Who are you?" Luo Hao asked.

    I'm a freshman, isn't that obvious?

    Wearing a camouflage uniform with an immature face, he looks like a freshman.

    Chen Xiao said: "Are you guys experimenting with lithium batteries?"

    Luo Hao was impatient: "This is the chemical laboratory, freshmen hurry out."

    Chen Xiao didn't mind then, and said: "If you want to increase the energy density of lithium batteries, there are two ways, one is to change the materials of the positive and negative electrodes, and the other is to optimize the packaging of the battery."

    "Are you making lithium cobalt oxide batteries? Do it according to Sony's 18650 battery specifications"

    The 18650 lithium battery is not a lithium battery made of a certain material, but the packaging size specification of the lithium battery formulated by Sony. 18 means a diameter of 18mm, 650 means a height of 65.0mm, and 0 means a cylindrical battery.

    Everyone originally thought that Chen Xiao was just a freshman who came to watch the fun, but they didn't expect Chen Xiao to be able to tell some knowledge about lithium batteries.

    Gao Miao asked: "Are you a freshman in the School of Materials and Chemistry?"

    Just now when she asked this question, Gao Miao felt something was wrong.

    Even if Chen Xiao is a major in materials and chemistry, he shouldn't know too much about lithium batteries, because freshman students generally study basic subjects such as advanced mathematics, physics, chemistry, etc., and don't involve in-depth professional knowledge  .

    Gao Miao's mood is very depressed now, and her mood is also very low.

    Liu Hao's plan was to quickly close the laboratory, and then he would accompany Gao Miao back to the dormitory.

    Girls have the lowest defense ability when they are in a bad mood.

    Liu Hao wondered if he could hold hands or kiss Gao Miao when he sent Gao Miao back later.

    As soon as Chen Xiao came, he talked for a long time, and there must be no more drama.

    Chen Xiao said: "I'm a freshman, majoring in finance, but I still have some research on lithium batteries. Let's see if I can discuss it with my seniors."

    After hearing this, the originally tense atmosphere and the postgraduates all laughed.

    Freshman, or major in finance?

    Come now to find a graduate student to discuss a graduate thesis?

    Liu Hao felt that it wasn't that he heard it wrong, but that Chen Xiao had something wrong with his mind.

    Liu Hao walked over and said: "This is a laboratory, a postgraduate laboratory. Students without permission are not allowed to enter. Freshman students will go to the dormitory to sleep and join in the fun."

    Liu Hao turned back and said to Gao Miao and others: "Okay, everything has been explained very clearly. Those who want to quit can quit, and those who don't want to quit, pack up quickly and continue the experiment at nine o'clock tomorrow morning."

    Liu Hao said to Gao Miao, "I'll take you back."

    Gao Miao took a look at Chen Xiao, and also regarded Chen Xiao as a freshman who came to see the fun, and didn't think about discussing any issues with Chen Xiao.

    Chen Xiao laughed helplessly, a little speechless, he took the experiment notebook on the table and said: "Currently you are experimenting with lithium cobalt oxide batteries."

    "Under the same volume, the energy density of lithium cobalt oxide batteries is indeed higher, but its high temperature resistance is not good, and the safety factor is low! It is easy to boom."

    "I glanced at your experimental records. You blindly changed the stabilizer mix ratio of the positive electrode (cathode) of the battery. IMHO, this did not find the key to the problem."

    Chen Xiao put down his notebook and said: "You are producing according to Sony's 18650 structure, and the external voltage of the 18650 structure battery will be overheated if the external voltage is lower than 2.7v or higher than 3.3v. If the temperature gradient inside the battery is not well controlled, it will  There is a great risk of fire, and the key to battery technology is voltage, current and heat control"

    "The theoretical density of lithium cobalt oxide is 5.1g/cm3, but now subject to technical reasons, for battery safety and to prevent battery explosion, we can actually achieve a maximum of 2.0-2.4g/cm3, which is actually not high.  .¡±

    "In addition, the electric heating peak value of lithium cobalt oxide is around 200, which is much lower than that of other cathode materials lithium batteries. Although this kind of battery has high power, high energy density, and high consistency, it has a low safety factor and heat  The characteristics and electrical characteristics are poor"

    Chen Xiao talked a lot in one breath, and finally said: "Now do you know why the batteries you practice are booming? You have to believe in science!"

    Chen Xiao received 5 points of influence from Gao Miao, but only 0.01 points of influence from Liu Hao.

    Why is there such a big gap?

    There is only one reason toexplain.

    Gao Miao is a top student and knows his experiments and papers very well, so he contributed a wave of influence.

    And Liu Hao is a scumbag who came to make soy sauce. Although he is a graduate student, he doesn't know much about his research field. After Chen Xiao finished speaking, he looked confused, not knowing what Chen Xiao was talking about.

    Liu Hao opened his mouth and said after a long time: "You are talking nonsense! You don't understand."

    But Gao Miao knew that what Chen Xiao said was all about doing something, and it was all very important knowledge, and the data that Gao Miao blurted out couldn't even be found by checking the information!

    Gao Miao couldn't believe that Chen Xiao was just a graduate student majoring in finance. She hurriedly asked, "You mean, there is a problem with the mix ratio of our cathode materials?"

    Chen Xiao smiled and said: "They are all 16850 batteries. You only know the size of the battery, but you don't know what is inside the battery, how it is packaged, and what kind of separator is used."

    "Not only is there a problem with the positive and negative electrode materials, but there is also a problem with the packaging."

    Chen Xiao said: "I saw your negative electrode material just now, and it is to coat the carbon powder on the copper foil. There is no problem at all, but why use ordinary carbon powder?"

    Gao Miao has now completely become a seeker of knowledge, with a longing look on his face, and his big eyes flickering at Chen Xiao, very cute.

    Chen Xiao coughed twice. It's hard to imagine that Gao Miao is actually a student of the third year of research. Even if she is 18 years old, she is 24 years old in the freshman year. She is 6 years older than Chen Xiao. With this kind of appearance, it is hard to say that she is a high school student.  Some people believe.

    Gao Miao was a little disappointed, and said: "There are problems with the positive and negative electrode materials, and there are still problems with the packaging"

    Their team has worked hard for almost half a year, but they didn't expect to be full of loopholes in the eyes of others.

    Although Takamiao's mentor is guiding the experiment, lithium batteries are a cutting-edge subject in the world, and the technology is in the hands of Japanese people. Even Takamiao's mentor can at most help Takamiao find some information, and there is not much that can help.

    The instructor even asked Gao Miao to change the topic, such as the impact of the environment on the materials of lithium batteries, etc., which is much less difficult.

    Gao Miao suddenly said in a somewhat embarrassed and soft voice: "Youcan you help me? ?
Didn't finish reading? Add this book to your favoritesI'm a member and bookmarked this chapterCopy the address of this book and recommend it to your friends for pointsChapter error? Click here to report