Scholar’s Advanced Technological System

The ark replied, "I'll do it. ”

The system does not specify by whom the experiment must be performed, simply repeat the experiment and collect the data to be collected. However, for the purpose of learning, the ship wants to operate itself again.

After all, the paper had to be shallow at last. The books were all theoretical. Only by putting them into practice could the legendary black technology be turned into a real guy.

The white coat was replaced with a sense of ceremony, and the ark took a little bit of a scientist's momentum and took a deep breath, reaching out to get the sample box containing the experimental material.

However, before he could touch his hand, he was snatched away by Brother Qian, who was quick with his eyes.

“I'll do it, watch. ”

Needless to say, Brother Qian took over the initiative of the experiment and left a shoddy canoe beside him.

Looking at Brother Liu, Brother Liu with arms shrugged helplessly.

“Never mind, the old money is like this, the equipment here is like his wife, more important than his life... for the first time you should watch him do it again. ”

Brother Qian did not return, then said: "Experimenting is not mathematics. If you change a decimal point and change it, you can continue to calculate it. The experiment is wrong with a small detail, which may result in the whole experiment being scrapped. Of course, what I'm even more afraid of is that you scrapped the lab equipment… show me the lab flow you designed. ”

“Here.” The Ark quickly took out the A4 paper.

The experimental steps required by the system and the experimental data to be collected are all written on them.

Brother Qian took the A4 paper and nodded: “The design is quite professional. ”

emmm...

After all, it was designed by the system.

The ark's expression was subtle and he didn't speak.

……

Experimental processes are simple, from making batteries to observing phenomena.

95.7% graphite was used as the anode material, the binder was sodium carboxymethylcellulose (CMC) and butylene rubber (SBR), and the collector was copper foil. The graphite layer is 90 μm thick, the cathode active material uses LiFePO4, and the current collector is aluminum foil.

As for the diaphragm, a three-layer diaphragm of CELGARD2325 is used, about 25 μm thick.

To prevent material oxidation, all operations are performed in an argon filled glove box.

Of course, not only to prevent material oxidation, but also to prevent LiPF6 components in electrolytes from reacting with water in the air to produce hydrofluoric acid.

Hydrofluoric acid is something that everyone who's studied chemistry in high school knows.

And how dangerous this thing is, and it should be clear to anyone who's been in a silicon-based microelectronics lab. If you put a little on one hand, it's almost impossible to see anyone.

From Brother Qian's operating procedures, it is obvious that he is more professional than the theorist of Ark.

Pretty soon, the sample was made.

To prevent the sample from being damaged, an edge-to-edge assembly method is used. Brother Qian completely covered the LiFePO4 material with a layer of diaphragm in the glove box and carefully left the positive and negative free ends 2mm apart.

This step is critical and is about the safety of the experiment.

Samples were taken from the glove box, and Brother Qian closed the various air valves and took a long breath.

“Done. ”

Looking at the sample in Brother Qian's hand, Ark asked: "Is this a battery? ”

“A simple and unsafe lithium-ion battery,” Brother Qian said succinctly.

The ark got a little nervous: “Will it explode? ”

Brother Qian shook his head: “The explosion will not, but it is improperly operated and may lead to a fire. ”

And it was on a digital microscope.

Burning down the sample is a small thing, burning the lens of the digital microscope, that's a big problem.

The Ark estimates that this is one of the reasons why Brother Qian won't let himself be a novice to the experiment.

The sample was attached to the BK-6808 rechargeable battery tester and placed on a digital microscope. Brother Qian set several parameters on the computer, whispering to himself as if he were repeating the steps on paper: “Once for 2min, the data collection frequency is 1Hz, the battery is first charged to 400min and discharged to the cut-off voltage... OK. ”

The rest is a long wait.

Looking at the unchanged instrument, the ark couldn't help but ask, "Do you have to wait so long to test battery materials? ”

Four cents. It's been almost seven hours.

Brother Qian pushed the glasses and said: “Seven hours is a basic operation, sometimes it takes a few days to see the results. Generally, someone will be left on duty in the lab, basically me and Liu Bo will do it alternately. ”

“That's right,” Lau Bo said with a smile, "I did more than 40 plays last year, when I was on duty in the lab. Do you want me to recommend something to you? ”

Ark: “Well, don't bother. ”

Even if he recommended it, he probably didn't have much time to see it.

After all the action needed to be done, Brother Qian simply taught the Ark some ways to deal with sudden situations.

For example, seeing the sample smoke, smelling something wrong, how to clean the damaged sample, how to protect the instrument, and most importantly, how to protect yourself.

No matter how valuable the instrument is, it is no more important than human beings.

Of course, the experiment was not that dangerous, so Brother Qian safely threw the keys on the ark.

He and Brother Liu have a few things to do. It is not possible to stay here all the time, and the Ark is embarrassed to cause such trouble. After all, this experiment has delayed them for a long time.

Take out the book of quantum chromodynamics, and the ark sits next to the digital microscope, with knowledge of the physics of vicious remediation theory, and look at the situation on the digital microscope from time to time.

Later, he found himself completely unnecessarily cautious, so that his taste stayed under the microscope for so long that nothing seemed to have changed outside.

It can be seen that Brother Qian's experimental technique is quite reliable.

Starting at around 10 a.m., he stayed in the lab until almost 6 p.m., during which time the ark ordered a takeout and had lunch.

Finally, the set time arrived, the charging and discharging ended, and the ark, according to Brother Qian, waited for 10 minutes to stay open and then cut off the power.

Almost immediately after he had done these finishes, footsteps came from outside the lab. Brother Liu, who had just had dinner in the cafeteria, almost stepped onto the lab.

“Done?” Looking at the situation of the eye sample, Brother Liu is skillfully operating the computer, clicking on the printed button, "then gather the data. ”

The printer buzzed.

Soon, the Ark got what he wanted.

A set of pictures recording the microscopic growth of lithium branches, and graphs such as circulating voltage curves that the system requires to collect, and so on.

While collecting these data, Brother Liu said in a chatty tone.

“… lithium is the ideal anode material, but it is also the hardest to serve. When charging, the lithium ions that return to the anode will never truthfully turn back into a flat layer of lithium metal, as you wish, but rather into a beautiful and deadly tree like a blossom. ”

Waiting for the printer to finish printing the chart, the ark asked casually: "Fatal? ”

“Yes, once it's formed, it will continue to grow unchecked as it continues to charge, and eventually, like a fork, it will pierce the diaphragm and touch the cathode. ”

Speaking of which, Brother Liu paused for a moment and said in a joke: “Imagine what would happen if you used a wire along with the positive and negative poles of the battery? That's right, it's short circuit. And organic electrolytes are flammable. Have you heard of moli? ”

“No… what is it? ”

Brother Liu shrugged his shoulders and handed over the printed a4 paper to the ark hand. "Their product almost made history, but it was just because lithium was used as an anode, which resulted in a major safety accident, which led to the recall of NTT phones and the acquisition of the company's bankruptcy. In contrast, Sony was smart, using graphite directly as an anode, and the launch of lithium-ion batteries quickly captured the market. ”

The ark couldn't help but ask, "Didn't they do a safety test? ”

Brother Liu sighed: “Yeah, that's what people would ask, but things may be far from simple. Probably did nothing wrong? Maybe they think they found the perfect solution? Who knows? Sometimes reality is so magical. ”