Chapter 381: Introducing Jade

"We have tried it, but the irradiation of high-energy particles can easily cause damage to the SEI and electrode structure; although low-temperature cryo-electron microscopy can solve this problem, due to the limitations of usage conditions, room temperature electrolytes cannot be used in the experiment, and in-situ observations cannot be achieved. In addition, the equipment used in this process is too expensive and has no promotion value!" Tao Ran gave a direct positive response.

They have tried this experiment before, using various electron microscopy techniques to understand the evolution of lithium dendrite growth at the nanoscale, which has always been a crucial method to solve this problem, so they naturally would not miss the opportunity to try it!

Their new energy battery research and development is to be market-oriented, that is, expensive and wasteful methods are not applicable! What they are looking for is to be able to effectively curb the growth of lithium dendrites, and the unit price must be relatively good and cheap, and it must also be able to supply power for a long time, so that it can be used as a real new energy battery to promote to the public.

In fact, many laboratory methods only exist in ideal data and have no promotional value.

"Cheng Xu and I tried to design a two-step method to study the real-time in-situ observation experiment of lithium dendrites based on the in-situ electrochemical atomic force microscopy (EC-AFM) on the formation mechanism of SEI film of various negative electrode materials of lithium-ion batteries. The potential of SEI film formation is more positive than the deposition potential of metallic lithium!"

After more than a year of research, and with Wu Tong's occasional advice and guidance, Tao Ran and Ruan Chengxu can say that they have made great progress in the field of new energy batteries, especially lithium batteries. This experimental design plan is the feedback they have gained so far.

"We used EC-AFM to study the growth process of SEI film in ethylene carbonate (EC) and fluoroethylene carbonate (FEC) based electrolytes in real time, and on this basis, observed the growth of lithium dendrites in situ!

Through the analysis of the Young's modulus, CV spectrum and EIS impedance spectrum of the SEI film formed by the two electrolytes, combined with XPS spectrum analysis, we found that the SEI film formed by the FEC electrolyte contains more LiF inorganic salts. Since LiF has good hardness and stability, the SEI film has higher strength and can effectively inhibit the growth of lithium dendrites within a certain range! "

Ruan Chengxu supplemented the introduction of the complete experiment. This is their progress. It can be said that they are currently at a relatively excellent level internationally. However, they still have not been able to completely solve the problem of the lithium dendrite shuttling effect!

New energy lithium batteries are a very popular and cutting-edge sector, and are extremely valuable!

Why do lithium batteries have such a magical power that makes people continue to be attracted to them? In fact, it is inseparable from a crucial concept: energy density.

The energy contained in a unit volume is called energy density. Translated into batteries, improving energy density is the most important indicator to measure the performance of a battery, and it is also the constant pursuit of scientific research and industry!

Even in the domestic 10th, 13th and 15th Five-Year Plans, the government has made clear plans to achieve the synchronization of power battery technology with international standards and maintain the world's leading production capacity by 2020. The most important red line is to increase the energy density of power batteries to 300-350Wh/kg.

This is the general direction of the plan. Wu Tong and the research team want to contribute their own efforts to this plan.

Of course, their team was overwhelmed by the temptation of this big piece of cake. There are countless people doing lithium battery research across the country and even around the world.

In the current laboratory, lithium-sulfur batteries have always been the mainstream, but after their continuous experimental elimination and consulting Mr. Wu's guidance, they finally set their sights on lithium negative electrodes, a field that once caused a stir and was abandoned by most.

This is not because they are trying to attract attention or going there knowing that there is a tiger there, but because the field of lithium negative electrode is extremely valuable!

If they can successfully solve the problem of lithium dendrites, all those hotly-hyped concepts will have to be put aside to make way for their lithium negative electrode batteries.

Not for anything else, but because the lithium metal negative electrode has the lowest electrochemical potential of -3.04V, not to mention the specific capacity of up to 3861mAh/g.

Using lithium material as negative electrode, the theoretical energy storage effect is ten times that of graphite battery, which is so tempting. It can be said that it crushes the energy density of graphite negative electrode materials in all aspects!

And the most attractive thing is that once the problem of lithium dendrite growth is solved, there is no need to make major design changes to the existing batteries. The existing common graphite negative electrode materials can be directly replaced to achieve a leap in battery energy density!

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If they can make a breakthrough in this area, in the future they may soon be able to use mobile phones and computers that can be on standby for one to two weeks, and electric cars that can easily surpass the currently idle range of 1,000 kilometers, thereby fully linking the situation of domestic oil imports. This is one of the important layouts for promoting new energy vehicles.

Mr. Wu and his colleagues all want to make a breakthrough in this field.

Not to mention the honor of success, just the royalties from this research and development patent alone can make them earn a lot of money, and they are likely to achieve financial freedom and no longer have to worry about money. Their free funds will inevitably increase significantly, and in the future, they may be hesitant to do experiments.

Although the equipment in Mr. Wu's laboratory and Mr. Wu's research institute is already advanced enough compared to many laboratories, this does not affect their desire to make the laboratory better.

If ordinary people have great pursuits for cars, houses, gold and silver jewelry, then they dream of all kinds of advanced experimental equipment, which makes their hearts beat faster than money and beauty!

The atmosphere in the conference room gradually reached a climax with the analytical speeches of Ruan Chengxu and Tao Ran. It can be said that every member actively and enthusiastically expressed their ideas and thoughts after such a long period of study and research.

Mr. Wu is doing it, so of course they have to actively perform. If they can get even a little guidance from Mr. Wu, their future research and development path will be able to be smoothed to many levels!

Biochemistry, environmental materials science, the four major fields, are able to take the initiative to step into these fields and are still making continuous progress. They are not simply studying for the sake of academic qualifications, but in the real learning, they have touched the mystery and fun of these studies. They truly like this major and are extremely interested in their majors, which is the source of motivation that supports them to where they are today.

No one wants to go one step further!