"If you have any good opinions, I hope everyone can brainstorm, speak enthusiastically, and put forward your opinions."
"I also have something to say."
"The sulfur/carbon composite material that can be cycled 1,000 times in the laboratory can only be cycled a few times in the actual battery, and sometimes it cannot even discharge a single charge."
Under such macro-control, there are always some promising research projects that can produce high-quality results.
"Now that Director Lu has said it, let's brainstorm and speak freely. Then I'll just throw some light on it and share some of my humble opinions."
Lu Zhou:? ?
The meeting started at ten o'clock in the morning, but it was only nine o'clock now, and the conference room was already packed with people and all seats were occupied.
“In the last meeting, the senior officials in Beijing have decided to make lithium-sulfur batteries a key development direction, but we still need everyone’s wisdom on how to solve more specific technical problems.”
The speaker this time was Professor Sun Hongbiao from Shuimu University.
The whispers stopped and the conference room became quiet, waiting for Mr. Lu to continue.
After Professor Wang finished speaking, he smiled and nodded to his colleagues and sat down.
At the same time, the purchased equipment will also be sent to Jinling through a special transportation company.
"You are right. Sulfur-carbon composites do have defects in this area, but in my opinion, these defects can be solved through repeated experiments. A year ago we all thought that lithium batteries were unstable. But now? Who can doubt the broad prospects of lithium batteries?"
On the surface, this meeting seems to be of little use. What everyone is discussing is not the existing results, but ideas for solving the problem. But in fact, the method involved is far from as simple as laymen think.
The deposit for purchasing the instrument was transferred directly from Star Technology's overseas account to the account of the European instrument manufacturer. After Qian Zhongming went there to sign, the remaining balance was transferred to the other party's account.
The speaker was Academician Wu Shigang from Aurora. Like Professor Wang, he is also a master in materials science.
At the meeting, Mr. Lu, as the host of the meeting, made a brief opening statement.
The scale of this seminar is not small. It is not only professors from Jinling University, but also professors from C9 alliance universities such as Yanda, Shuimu, Zhejiang University, and Aurora, as well as materials science and organic materials from a group of 211 strong universities such as Jinling University of Science and Technology. Professors in the field of synthesis and engineers from battery companies such as BYD also participated in the meeting.
Generally speaking, if the country determines the general direction of lithium-sulfur batteries, then in the application for vertical projects, the topic of lithium-sulfur batteries will be relaxed, and other research topics such as lithium-air batteries will be tightened.
From a personal perspective, everyone naturally hopes that their research direction will receive more policy and funding support.
The old professor coughed slightly and spoke unhurriedly.
Considering the importance of these instruments, Qian Zhongming did not delay. On the day he took up the job, he ordered a ticket for the next day and flew to Europe with Liu Bo.
Overall, the situation doesn't seem particularly promising.
As an internationally renowned scholar who has solved the problem of lithium dendrites, Lu Zhou naturally participated in the meeting.
But it doesn’t matter if you don’t understand, and they don’t need to understand. When making decisions, they often refer to the opinions of some industry experts, formulate a macro direction in decision-making, and give priority to ensuring that topics in this direction receive sufficient research funding.
National and corporate scientific research funds are limited, and not all projects can apply for sufficient research funds.
"When I participated in the 863 project and researched issues related to lithium-sulfur batteries, I had actually considered carbon-sulfur composite materials. This strategy seems to be very effective academically, but its practical effect is very limited."
"The cost is not expensive, and the energy density is considerable. The theoretical energy density I measured in the laboratory is close to 2000Wh/kg, which is far higher than the lithium-ion batteries commonly used in the industry. I published the relevant paper in Materials Science in the top issue of "Advanced-Materials", but this technology is not perfect and needs to be improved."
It is precisely for this reason that the importance of such seminars has emerged.
Lu Zhou, who was sitting in the front row, sighed inwardly.
"In fact, the key to solving the shuttle effect of lithium-sulfur batteries, the current mainstream approach in academia is to use porous carbon materials to block polysulfide ions and reduce the dissolution and loss of sulfur. My suggestion is that we can adopt a similar idea to The focus of research and development is on sulfur-carbon composite materials.”
Lu Zhou:…
Although it was not as direct or as brutal as the MRS meeting, but with a little more care, you can hear the overt and covert meaning in those words.
"Our research team discovered a highly ordered nanostructured carbon-sulfur cathode structure in experiments, which can use the carbon material structural framework to limit the dissolution of sulfur during the charge and discharge process, thereby effectively curbing the shuttle effect."
At about half past nine, Mr. Lu exchanged a few words in a low voice with the academician of the Chinese Academy of Sciences next to him.
Sitting on the seat with his nameplate on it, Lu Zhou took a sip from the mineral water bottle he opened and took advantage of the gap before the meeting to observe the expressions on the faces of his colleagues.
"Since everyone is already here, let's not waste precious time waiting."
However, his speech was a little different from the big guys who spoke before.
Mr. Lu nodded seriously.
"The research work in the laboratory is all based on very small button batteries, the electrodes are very thin, the sulfur loading is not high, and the total sulfur content is about a few milligrams. However, the sulfur content in actual batteries is relatively large, usually in grams. level, and the electrode is very thick and has a high unit sulfur load.”
Fortunately, the system's scanner saved him a lot of research and development costs, and the lithium dendrite technology was also sold at a good price. Otherwise, at this moment, he might have to bite the bullet and join this battle.
After straightening the microphone, Academician Wu pondered for a moment and then spoke.
Lu Zhou was not idle either. On the third day after Senior Brother Qian left for Europe, Jinling University held a seminar.
Seeing that almost everyone had arrived, he straightened the microphone, cleared his throat and spoke.
Regarding Professor Wang's opinion, Mr. Lu immediately expressed his attention and asked with a serious expression: "What about the cost? And the energy density? Is this technology reliable?"
"Let me also say a few words."
To solve the shuttle effect of lithium-sulfur batteries, we can start with the cathode material, or we can start with the electrolyte, and then we can subdivide it into thousands of ways.
"...Energy is the lifeblood of industry. Whoever controls new energy will control the future. This task is very arduous and is related to our country's strategic layout in the field of new energy."
However, before his stool was warm, a calm and steady voice came from the professor's seat at Yanda.
In terms of lithium battery materials, Shuimu University's international ranking is slightly lower than that of Aurora and Yanda, but its influence is also considerable.
After a pause, Professor Wang continued.
"Academician Wu, please speak."
At this moment, another professor spoke.
After standing up, Professor Wang smiled warmly and said.
The secretary sitting next to him was quickly taking minutes of the meeting in his notebook.
“This seminar mainly discusses ideas for solving problems.”
The same applies to research specifically.
It seems that because they know that this subject is very difficult and the task is arduous, everyone's expressions are very serious and the atmosphere in the conference room is also very depressed. Even though it was full of people, you couldn't hear much.
The old man has been doing research in this area ten years ago, and because he is a scholar born as an engineer, he pays more attention to the practical value of a technology than a scholar who is good at theory.
Lu Zhou, who didn't want to get involved in the quarrel between the big guys, sat there silently, but he was still shot inexplicably.
Unlike academic conferences like the MRS conference, this seminar is semi-academic in nature and does not exchange research results, but discusses research and development directions.
The first person to stand up and speak was Professor Wang Haifeng from Zhejiang University.
The total value of the instruments on this purchase list exceeds 50 million US dollars, which is more than 300 million yuan converted into RMB.
However, it was not him who rebutted, but another professor who was engaged in carbon-sulfur composite materials, and his words were well-founded.
As for the topic of discussion, it can be seen from the lineup of participants that it is naturally lithium-sulfur batteries.
Moreover, he is working in the direction of solid electrolytes.
The meeting was very lively.
Professor Wang did not just talk in vain. Professor Wang brought out the existing research results as soon as he started, improving his persuasiveness.
It is precisely because of this that although the atmosphere before the meeting started was very depressing, after the meeting started, the discussion was still quite active.
"I noticed that Professor Lu has been silent, but looking at his expression, he seems to have a good idea about this issue. I didn't have anything to say, I just wanted to hear his opinion."
"Moreover, the most fatal common problem of carbon-sulfur composite materials is that the volume energy density is not high. If it is a battery for 3C products such as computers and mobile phones, it is easy to use carbon-sulfur composite materials as the cathode. If it is a car or something larger, It’s hard to say what’s going on.”
Seeing this old man, Mr. Lu also said respectfully.
In addition to scholars and professors who research lithium battery materials, participants also include representatives from the National Scientific Research Fund, as well as representatives from new energy companies such as BYD and Shanke and project R&D engineers.
However, the bureaucrats in the Ministry of Science and Technology and the Ministry of Finance do not understand academics.
However, Professor Wang suddenly became unhappy.