They came to the café mainly to discuss the cathode material of lithium batteries.

There are only two that are known now, which is too few, and not only that, but they are all subject to patent barriers.

The two of them glanced at each other, and what they saw in each other's eyes was ridicule: just two technologies, they want the company to pay royalties, but there is no door, and they are more unwilling.

As professional enthusiasts like them, it is to constantly improve the existing theories and improve the defects of the existing theories on the basis of the existing theories.

What is the most obvious flaw right now? It's completely experimental.

Several professors have written two papers based on the results of this experiment, and as for mass production, it is far away.

"Bill, for now, the titanium sulfide, lithium cobalt oxide and lithium manganese oxide batteries developed by several professors have been used as cathode materials, and there are more or less some problems, how can we break this deadlock next?" Ge Zhongxing took a sip of coffee and asked thoughtfully and casually.

"Ge, this kind of thing is still very difficult. He glanced at Ge Zhongxing with a smile, and then asked, "Do you have any good ideas?"

Ge Zhongxing then continued to take a sip of coffee, shook his head gently, and replied to the question: "In my hometown, Chinese people mainly drink tea, and when they come to your side, they can only drink coffee. At first, I didn't think it tasted good at all, but as time went on, I got used to it. ”

Bill looked at him blankly, what does this mean? We're talking about battery cathode technology, okay? Are you giving me any of this?

"What do you mean?" asked Bill, who didn't understand.

"We tried to replace cobalt and manganese, just like I am now, replacing tea with coffee. After he finished speaking, he smiled bitterly.

Wandering in a foreign land, you can only adapt to the new environment, and if you can't adapt to the environment, you can only be eliminated by the environment.

"You mean to replace the current 25 manganese and 27 cobalt with other elements?

Is it possible that we mix and match the two elements in different proportions?" Bill suddenly became excited.

"It's a stupid idea, but I guess someone has tried, but it just didn't work. ”

Bill shrugged helplessly, yes, it was a long and arduous screening job.

"Come on, Bill, let's start with 26 iron. Ge Zhongxing drank all the coffee in one gulp, put the cup on the table heavily, and continued to go back to do the screening test without looking back.

"You think it's better to try aluminum hydroxide?" said Bill as soon as he walked to the door.

It is well known: it is not only flame retardant, but also prevents smoke, does not produce droplets and toxic gases, and above all, it is affordable.

They came to the lab, and Ge Zhongxing took out some white amorphous powder and poured it into a container.

I don't know why, when he saw these powders, he suddenly remembered the scene of his mother making dumplings and noodles at home, he subconsciously added water, and noodles...

"Hey, man, what are you doing?" exclaimed Bill, "Are you going to make bread?"

Ge Zhongxing was yelled at by him, and instantly sobered up, what am I doing with noodles? This is not making dumplings at home.

If this kind of experiment fails, the consequences are unimaginable, ranging from failure to the destruction of the entire laboratory.

Ge Zhongxing took a deep breath, adjusted his mentality, put the batter in the heater to heat, and kept stirring in his hands to make the batter heat evenly, about 10 minutes or so, when the excess water evaporated, he found that the temperature displayed on the heating sensor was 62 degrees, and the temperature was recorded first.

Ge Zhongxing turned off the heater, waited for the temperature to drop to about 15 degrees, and carefully packed the batter into button-sized containers.

Finally, together with the container, it was put into a small dryer to dry, the maximum temperature of this dryer was only 480 degrees, he first adjusted the temperature to 200 degrees, and after baking for 10 minutes, he directly adjusted it to the highest, and after 40 minutes, he finally got the crystals with the right degree of dryness.

This crystal, which is the cathode material they obtained, is packaged with a diaphragm and set aside.

Next, he injected 3% of the total mass of aluminum hydroxide into the heated organic solvent-based ethylene carbonate, a special material used as an electrolyte.

This is a transparent colorless liquid at a temperature of more than 35 degrees Celsius, and a crystalline solid at ordinary room temperature. This is a small patent that Song Qian got by chance when she was a chemical engineering student at their school, and it cost 2,000 US dollars, which is equivalent to picking it up for nothing.

After Bill got his hands on the material, he experimentally found that it was possible to achieve high output power even at low temperatures. The safety performance in high-temperature environments will be further improved, effectively suppressing the generation of gases in high-voltage environments, and suppressing adverse reactions on electrodes, improving the cycling characteristics of the battery.

Everything is in place, and the rest of the laboratory has already prepared the negative electrode shell, diaphragm, gasket, spring sheet, positive electrode shell, tablet mold, pipette and insulating tweezers.

Bill put on insulating gloves to hold his breath, put the negative electrode shell flat on the insulating table, put the lithium sheet in the middle of the negative electrode shell, flattened the lithium sheet with a tablet pressing mold, put it into the upper layer of the lithium sheet, and the pipette took the electrolyte and dripped it onto the surface of the diaphragm.

All the steps were determined through repeated discussions, combined with other similar projects.

I saw that he then used insulating tweezers to put the test pole piece, gasket and spring sheet on the electrolyte in turn, and you will find that he overlapped the active material side of the pole piece with the electrolyte.

After the above procedure, he finally covered the cathode shell.

When he was done, he exhaled heavily and took a greedy breath.

Then he continued to use insulating tweezers to put the negative electrode of the battery facing up, put it on the mold of the battery sealing machine on the side, he used a paper towel to pad the battery, while adjusting the pressure of the mold machine, and when the pressure was displayed to 800MPA, he pressed it for 6S, and quickly took out the battery.

As you can see, the paper towel is stained with electrolyte.

He quickly took the other paper towel and carefully wiped the electrolyte clean.

At this point, their battery is considered to be complete, and the whole process is smooth and in one go.

Bill took off his insulating gloves and happily walked over to high-five Ge Zhongxing and the others in celebration.

After testing, the final data shows that the working temperature of this battery is -5~70 degrees, the battery capacity is 0.65A·h, and the energy density is 140W·h/kg.

After countless charge-discharge tests, its charge-discharge life was finally fixed at 3300 times.

The two of them are inevitably a little disappointed, mainly because their lifespan is still too short.

However, they are one step closer to success, and they can also announce to the laboratory and the industry that their lithium aluminum hydroxide battery, if sent to the factory for mass production, will not have any problems at all.

This will be the world's first mass-produced lithium battery.

Due to the rules of the Battery Research Institute, they can only report first, and their papers can only be published after the research institute has patented their test results.

But the two of them have reason to believe that the world's first mass-produced lithium battery must be inseparable from their contributions.