Scholar’s Advanced Technological System

The hardware level of Frick's Chemical Laboratory is indeed the top level in the United States. Princeton is not only willing to spend money on professors, but also on the instrument.

I consciously moved the latest maccor high-precision battery test system, and Connie looked at Lu Zhou and smiled.

"The best battery test system for the entire Fick Chemical Laboratory is this guy, I borrowed it for you!"

Lu Zhou: "The utility model does not have such a good battery test system..."

Connie explained: "But you said that investing in the instrument is better than spending the budget on the samples consumed by the repeated experiments."

Staring at Connie and looking at his eyes, Lu Zhou suddenly felt that this kid was not as thick as he looked.

The money for this machine purchase can be recorded in his account.

If it was before, Lu Zhou would definitely feel bad for a while.

But now...

Ok, waste is shameful, he is still a little bit distressed.

But it doesn't hurt so much.

Putting things on the side of the instrument for a while, Lu Zhou asked with a serious look: "Do battery samples do?"

Connie immediately said: "No problem, it's easy!"

Lu Zhou thought about it and made a statement: "No.11 and No.14 are responsible for you. I am responsible for samples No.15 and No.23. The hollow carbon ball powder is mixed with elemental sulfur according to 30%, 20% and 10% mass fraction. , make a positive electrode material, and then assemble lithium battery, how do you understand it?"

Connie is standing upright: "Of course!"

There is nothing to say about the negative electrode material. Because the synthesis process is simple, the combination of the modified pdms film and the copper core lithium plate is not only the standard of the industry, but also the standard of the major materials research institutes.

As for the positive electrode material, it takes a little thought.

Not just hollow carbon spheres, all carbon nanomaterials have similar troubles.

Simple mechanical agitation and grinding can only make the hollow carbon ball agglomerate macroscopically mix with the matrix powder, and it is powerless to disperse the agglomerate itself.

Before the hollow carbon spheres are mixed with the elemental sulfur by ball milling, they are also dispersed in ethanol by adding a surfactant such as polyurethane, and then mixed with elemental sulfur.

As for the remaining steps, there is no particular difference between the original lithium battery experiments.

The batteries were assembled in a glove box and then connected to a battery test system to confirm the performance of these materials in the electrodes by a large number of charge and discharge tests.

There is no skill in these tasks.

In fact, the study of materials science itself has no skill.

The current research and development of new materials is based on the researchers' "scientific intuition" and a large number of repeated "trial" experiments, using limited conditions to find a feasible method. If we can build a set of theories that apply within a limited scope on the basis of it, then it is quite a big bull.

Although the mathematical method can reduce the workload of the experiment, the experiment is still essential...

......

I remember the last time I burst the liver, or this time last year.

In order to complete the final step of solving Goldbach's conjecture, Lu Zhou shut himself in a world of less than 20 square meters, completely immersed in the maze of numbers, looking for the ultimate way out.

Compared with the feeling at the time, the feeling now is simply awkward.

This long-lost feeling is really nostalgic.

It’s been a week since the first experiment started.

During this time, Lu Zhou did not sleep in the laboratory, and the rest of the time was basically in the laboratory.

Two days ago, Yang Xu, who conducted the experiment at the Jinling Institute of Computational Materials, made a table of the effects of specific surface area and pore size on the sulfur loading and the mass fraction of polysulfide in the electrolyte. Arrived at his mailbox.

In order not to delay the work there, he needs to build a mathematical model based on these data as soon as possible, and then develop the next experimental plan.

Things seem to be all piled up together.

With the squeaky eyebrows, Lu Zhou left the ballpoint pen in his hand and looked at Connie, who was observing the sample.

"How is the sample No. 15?"

Also with dark circles, Connie's expression next to the scanning electron microscope shook his head bitterly. "The last group was completely scrapped. Almost all sulfur is deposited on the surface of the carbon material. You can look over it. It looks very spectacular..."

Lu Zhou sighed softly: "Take the sample on the SEM and take a film, then dispose of it... I have seen enough."

It’s too fierce.

If this is the case, the three sets of samples from numbers 11, 14, and 15 are almost completely wiped out.

For such a tragic experimental result, Lu Zhou could not help but wonder if his theory was not a problem.

Can the specific surface area in the range of [2326m2g-1, 3762m2g-1] and the hollow carbon nanospheres in the range of [60nm-70nm] really inhibit the diffusion of polysulfide compounds?

However, this is also the thing he is least willing to doubt.

Because after that, he counted many times and got the same result.

If this theory is really problematic, then he has to face a difficult choice.

I pretend not to know, and continue to hang in the industry with my conscience. Or do a scholar with aerobics, find the error to take the initiative to correct, honestly and actively contact the editorial department of the Journal of Shuimu University to withdraw the draft...

In the former case, the feasibility is still very high. Even if it is proved wrong by others in the future, you can use the "honest mistakes" to smother the past, and no one will be embarrassed. But think of the social resources that are wasted...

and many more!

Lu Zhou suddenly had a spirit and returned to God.

This experiment has not been done yet, and I have started to think about things.

Where is this going to be?

Tightening his fist, Lu Zhou took a deep breath and calmed down, looking at Connie and asking.

"What about the sample No. 23?"

"Let me know... 10% and 30% of the group has been finished since 200 revolutions, 20% group... unbelievable, this is 500 revolutions, and still struggling."

The word struggle is very interesting.

It seems that his assistants have no hope for this experiment.

However, it seems completely different in Lu Zhou.

As if he had grasped the last straw, he restrained the excitement and asked: "What is the volume change of the negative electrode?"

After looking through the transparent part of the battery case for a long time, Connie squinted and got an ambiguous answer: "It seems that nothing has changed."

Lu Zhouke slammed the impulse of swearing: "Don't use visual inspection, give me the caliper caliper! I want an accurate answer!"

"I know, I just made a joke..." Disassembled the battery, Connie carefully handled the positive material inside, and measured the width change with a vernier caliper.

The volume expansion effect of carbon-sulfur composites is very obvious once they occur, even at macroscopic scales.

After measuring it once, Connie recorded the data in the experimental report, and suddenly fell slightly.

Then he measured another group.

Also tested a group...

Looking at the Connie who was grinding there, Lu Zhou frowned slightly.

"Failed?"

"No..." Connie shook his head and swallowed. "The result is so hard to believe..."

“Immediately determine the chemical composition of the electrolyte!” Standing up from the office chair, the momentum of Lu Zhou’s body has never been higher. “Action is fast!”