Scholar’s Advanced Technological System

Of the many technical difficulties that constrain lithium-sulfur battery technology, the most difficult to solve is probably the countless shuttle effect.

The so-called shuttle effect refers to a polysulphide (Li2Sx) intermediate produced by the cathode that dissolves into the electrolyte and diffuses through the diaphragm to the anode, ultimately in direct contact with the lithium metal of the anode during charging and discharging.

Originally, in order to seize lithium-sulfur battery technology and complete the patent layout in front of ExxonMobil, it was sort of an ark with the future of China's new energy industry. In this project, Professor Da Niu Stanley in the field of lithium batteries launched an isolation comparison.

At the time, Professor Stanley, with the support of ExxonMobil, also used an extremely disgraceful means to acquire an assistant from the Salott Institute under his name and steal the caged carbon molecular model he had given to Professor Salott to study.

But also thanks to this Oolong.

Not only did Professor Stanley go further along the "wrong” path, but he also distorted the system task of "parsing carbon nanospheres beneath modified PDMS films" for the Ark, helping him to upgrade his material level to LV4, also indirectly helping him to shock a research bottleneck in Bono award results...

Shame on you, after all these years, the Ark has not called this generous old professor for a thankful call.

And the black powder in the tube in his hand at this moment is the caged carbon molecule that Professor Stanley studied, the carbon nanospheres found on Wreck One.

Yang Xu: “This is..."

“A caged carbon molecule used to carry an oxygen molecule, although I prefer to call it a carbon nanosphere. ”

The tube was delivered to Yang Xu's hand, and the ark continued, "Don't forget that in addition to the gas exchange chamber and the outer diaphragm, we also have a modified PDMS film on our lithium anode material, mixing it in when the modified PDMS film is formed, and when the oxygen molecule concentration difference between the two sides of the film reaches a certain value, they carry the oxygen molecule from one side to the other like a little bee. ”

In short, two insurances are added to the oxygen nitrogen separation system, the first being the selective passage of oxygen molecules through the membrane, which is a mixture of those organisms listed on the white plate by the ark, to create a relatively pure oxygen environment with up to 98% oxygen content in the gas exchange chamber!

As for the second insurance, the modified PDMS film on the lithium anode material itself!

Only after the addition of a hollow carbon sphere will the modified PDMS film on the surface of the lithium anode move the oxygen molecule from high purity oxygen to the surface of the lithium anode material.

“… we can even indirectly control the performance of the battery by modifying the number of carbon nanospheres on the PDMS film to control the rate of the entire lithium oxidation reaction. ”

Listening to the description of the ark, Yang Xu's eyes filled with shocking divine colors.

Does this thing really work?

Though I'd love to, as a researcher, it would be a disgrace to ask such a stupid question if the samples were already in his hands.

Without hesitation, he took the tube to the side of an experimental device.

There is a battery mold and a protective gas operating box for assembling and testing battery grinders.

It's easy to test the theory of an ark, and you don't even need a complete lithium empty battery model.

All he had to do was make a lithium metal sheet covered by a modified PDMS material mixed with this carbon nanosphere, and then expose it to a range of environments, such as air and pure oxygen, pure carbon dioxide, pure nitrogen, and so on, and it was easy to know whether it had the properties to allow oxygen to pass through and whether it allowed only oxygen to pass through.

After complicated preparation and patient waiting, the results of the experiment were finally awaited by all.

In the air environment, the reaction of the sample is not obvious and the surface has very small amounts of oxide, which can be determined to be lithium oxide!

In a range of environments such as nitrogen and carbon dioxide, the sample did not react at all!

As for pure oxygen...

As the Ark says, the entire lithium anode surface has changed amazingly!

Looking at Yang Xu, who no longer knew what to do and look like to express the shock in his heart, Ark Zhou smiled and continued with ease, "Your expression will be even more surprising if you observe the entire reaction in microscopic conditions. ”

Yang Xu swallowed his mouth and said painstakingly: "… this experiment… have you finished long ago? ”

Ark: “I told you, I did this experiment long ago when I was teaching in Princeton, but it just never came out. ”

Of course, there's still a lot of difference between this carbon nanosphere right now, and the original version that Professor Stanley made.

Especially in terms of detail, the position of several large π bonds on the surface was adjusted by calculating chemistry, making its handling capacity more obvious and the requirement for oxygen purity slightly reduced.

But the way these carbon nanospheres are made is that they all come together.

“It's incredible...”

“The nature of this shuttle carrying oxygen molecules in polymeric materials is amazing! ”

Looking at Yang Xu, he said with some nostalgia.

“It's amazing, until now I've been thinking about the causal mechanism of this amazing handling process, and even made two explanatory theories, but I can't find any evidence to prove which one is right. ”

Yang Xu: “How did you...? ”

As soon as I heard the question, the ark looked a little embarrassed, beat a haha smile and said.

“This is a long story, and thanks to the help of an old friend, I solved the most critical problem of this kind of caged carbon molecular synthesis, and then I made a few small improvements based on his research, modifying a few large π bonds. ”

Of course, the most important thing is wreckage number one...

If this material is being introduced, just to find a hollow carbon sphere that fits the height of the oxygen molecule, that's enough for him to do.

Yang Xu asked, "Is the patent okay? ”

"No problem," replied the Ark immediately, "my old friend very generously sold it to me at a very cheap price. ”

It was a long time ago.

Not long after the lithium-sulfur battery came out, the patents in ExxonMobil's hands had become scrap paper, let alone the lithium-air battery could not see a shadow. Even Professor Stanley himself did not know that what he had developed was used for lithium-air batteries, so Startech bought the patents at no great cost.

Of course, it was bought either in the name of Starry Sky Technology or in his name.

It doesn't cost much, but the operation is a little complicated.

Yang Xu, who did not understand the inner affairs, said with emotion: “Your old friend is a good man. ”

The ark also smiled sharply.

“Yeah, I think he's a good guy, too. ”

……

The technology of oxygen molecular selectivity through the membrane has been overcome, and with that critical carbon nanosphere, the lithium air cell as a whole, the technology tree is lit up, basically without any suspense.

After calling Chen Yushan and leaving the patent layout to her to worry, Ark left the Jinling Institute of Higher Studies.

Speaking of which, he came in the morning and left with the moon on the Pegasus.

It's okay to do a computer simulation in front of you, just to put a ready-made model on your computer and run it over. Later, it took a lot of time to verify the handling of oxygen molecules in carbon nanospheres, especially the lithium metal sheet coated with the modified PDMS film, which was tortured for a while.

In Wang Peng's car, after more than thirty hours of unsuccessful ark, he made a call. He was about to sit down for a while, but at this time, he suddenly received a call from Director Li.

As soon as the phone was on, he couldn't even say "hello”, and the sound of the fire came from across the street.

“I read your report! Is it true what it says? Are you sure? The carbon-based ——” suddenly I realized that this thing was inconvenient to say on the phone, Director Lee immediately stopped talking, bit his teeth and changed his mouth, "you wait, I came to your house and you said. ”

He hit a boat, didn't understand what he was talking about, a fog asked.

“Where are you coming to me now? ”

“Go to the capital! Get on a plane! ”

Ark: “…? ”

Not yet, the phone hung up.