The hardware level of Frick's chemistry laboratory is indeed worthy of the top level in the United States, and Princeton, who has deep pockets, is not only willing to spend money on professors, but also has no ambiguity in investing in instruments.

Consciously moved the latest MACCOR high-precision battery test system, Connie looked at Lu Zhou and smiled innocently.

"That's the best battery testing system in the entire Frick Chemistry Labs, I've borrowed it for you!"

Lu Zhou: "It is not practical to have such a good battery test system......

"But you've said that it's better to invest in an instrument than to spend your budget on the samples you consume for repeated experiments," Connie explains. ”

After staring at Connie twice, Lu Zhou suddenly felt that this kid was not as honest as he looked at all.

The money for the purchase of the machine was all recorded in his account.

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

But for now......

Well, it's shameful to be wasted, and he's still a little distressed.

But it doesn't hurt that much.

Putting aside the matter of the instrument for the time being, Lu Zhou asked with a serious face: "Will the battery sample be made?" ”

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

Lu Zhou thought for a while and made an order: "You are in charge of samples 11 and 14, and I am responsible for samples 15 and 23." According to the mass fraction of 30%, 20%, 10%, the hollow carbon ball powder is mixed with elemental sulfur to make cathode materials, and then the lithium battery is assembled, how to understand, right? ”

Connell straightened his chest and said, "Of course! ”

There is nothing to say about the anode material, because the synthesis process is simple, and now the combination of modified PDMS film and copper core lithium sheet is not only the standard configuration of the industry, but also the standard configuration of major materials science research institutes.

As for the cathode material, it takes a little thought.

Not just hollow carbon balls, but all carbon nanomaterials have similar troubles.

Simple mechanical stirring and grinding can only make the hollow carbon pellet aggregate macroscopically mixed with the matrix powder, and can not do anything to disperse the aggregate itself.

Before mixing hollow carbon balls with elemental sulfur using the ball milling method, they are dispersed in ethanol by adding surfactants such as polyurethane and then mixed with elemental sulfur.

As for the rest of the steps, there is no big difference from the lithium battery experiment done by Lu Zhou.

The battery is assembled in a glove box, then connected to a battery test system, and the performance of these materials in the electrodes is confirmed through extensive charge-discharge tests.

There is no skill to be done in these jobs.

In fact, the study of materials science itself is not very skillful.

At present, the research and development of new materials is mainly based on the "scientific intuition" of researchers and a large number of repeated "trial method" experiments, using limited conditions to discover a feasible method. If a set of theories that can be applied to a limited scope can be established on the basis of the foundation, it will be quite a great deal.

Although mathematical methods can reduce the workload of experiments, experiments are still essential......

……

I remember the last time I burst my liver, it was this time last year.

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

Compared to the feeling at the time, the feeling now is simply nothing but a drop in the bucket.

This feeling of being lost for a long time is really nostalgic.

It's been almost a week since the first experiment began.

During this time, Lu Zhou basically spent the rest of his time in the laboratory except for not sleeping in the laboratory.

In addition, two days ago, Yang Xu, who directed the experiment at the Jinling Institute of Computational Materials, made a table of the effects of the specific surface area and pore size of the hollow carbon sphere on the sulfur loading and the mass fraction of polysulfide compounds in the electrolyte and sent it to his mailbox.

In order not to delay the work there, he needs to build a mathematical model based on this data as soon as possible, and then make a plan for the next experiment.

Things seem to be all piled up.

Rubbing his sour eyebrows, Lu Zhou threw aside the ballpoint pen in his hand and looked at Connie, who was observing the sample, and asked.

"How's sample 15?"

Connie, who also had dark circles under his eyes and was standing next to the scanning electron microscope, shook his head with a somewhat depressed expression, "The last group is also completely scrapped, and almost all the sulfur is deposited on the surface of the carbon material. You can come and take a look, it's spectacular......"

Lu Zhou sighed softly: "Take the sample to the scanning electron microscope to take a picture, and then dispose of it...... I've seen enough. ”

It's tragic.

If this were the case, the three groups of samples numbered 11, 14, and 15 would have been almost completely wiped out.

For such a tragic experimental result, Lu Zhou couldn't help but wonder if there was something wrong with his theory.

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

However, it was the last thing he wanted to doubt.

Because after that, he calculated many times, and all came to the same result.

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

is pretending not to know, and continues to pit the industry with a clear conscience. Or be a disciplined scholar, take the initiative to correct errors when they are found, and honestly take the initiative to contact the editorial office of the Journal of Mizuki University to retract the manuscript......

In the case of the former, the feasibility is still very high, and even if it is proven wrong by others in the future, he can use "honest mistakes" to prevaricate the past, and no one will embarrass him. But think of those wasted social resources......

Wait a minute!

Lu Zhou suddenly had a stirring spirit and came back to his senses.

This experiment is not done yet, and I have begun to think about the future.

Where is this?

Clenching his fists, Lu Zhou took a deep breath, calmed down, looked at Connie and continued to ask.

"What about sample 23?"

"Let me see...... The 10% and 30% groups are finished from 200 rpm, and the 20% group ...... It's unbelievable, it's all 500 turns, and it's still struggling. ”

The word struggle is used in an interesting way.

It seems that his assistant has lost all hope for this experiment either.

However, in Lu Zhou's view, it is completely different.

As if grasping the last straw, he restrained his excited tone and asked, "What about the volume change of the anode material?" ”

Looking inside through the transparent part of the battery case for a long time, Connie was slightly stunned, and came up with an ambiguous answer: "It seems that nothing has changed." ”

Lu Zhou restrained the urge to burst into foul language: "Don't use visual inspection, take it apart for me and use vernier calipers to measure!" I want an accurate answer! ”

"I know, I'm just kidding......" disassembling the battery, Connie carefully disposed of the cathode material inside, measuring its width change with vernier calipers.

The volume expansion effect of carbon-sulfur composites is very obvious once it occurs, and it can be clearly observed even at the macroscopic scale.

After testing it once, Connie recorded the data on the experiment report and was suddenly slightly stunned.

Then, he tested another set.

Another set of ...... was measured

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

"Failed?"

"No......" Connie shook his head, swallowed and foamed, "It's hard to believe it's good......"

"Determine the chemical composition of the electrolyte immediately!" Standing up from the office chair, Lu Zhou's momentum was unprecedentedly high, "Move fast!" ”