Chapter 487 The problem of lithium dendrites is solved
In particular, she had to go to several laboratories to borrow some of the materials she needed.
Fortunately, I borrowed it. If not, it would be really hard for a clever woman to make a meal without straw.
Therefore, just to improve this material, she spent two days on Saturday and Sunday, and was unable to conduct the next experiment at all.
Because she had to go back to class on Monday, and others were waiting to use the laboratory, so it was impossible to keep it just for her.
Therefore, if she wanted to do an experiment, she could only wait until next week.
"Girl, what's wrong?"
Cai Guozhong also heard about Cen Li coming to the Institute of Physics, so he wanted to come over and have a look, but he didn't expect to meet her with a sad face.
"I don't have enough time and need to go back to school. The experiment is only half done." Cen Li didn't hide anything and told Cai Guozhong about the difficulty.
"This, you just told Grandpa Cai, let's go, I will take you to a good place." After hearing this, Cai Guozhong patted Cen Li on the shoulder and led her away.
Not long after, when they arrived at a laboratory, Cai Guozhong opened the door and let Cen Li in.
Once inside, Cen Li was shocked. The experimental equipment here was even more complete than the laboratory she had stayed in before.
"This is my old friend's exclusive laboratory. He has just completed a research project recently. It is temporarily vacant and will be used by you."
Cai Guozhong said, handing the key to Cen Li, "But you have to promise to take good care of the things in the laboratory."
Cen Li quickly took it and said happily, "Grandpa Cai, don't worry, I guarantee that the laboratory will be returned intact."
"That's alright, let's go. We haven't eaten yet. Grandpa Cai invites you." Cai Guozhong nodded with a smile and took her to the cafeteria.
After eating and returning to the dormitory, Cenli was not idle. She picked up a pen and continued to draw cartoons.
There is no way, time is too precious for her, not a minute can be wasted.
After that, Cen Li would attend classes while going to the research institute to conduct experiments at noon and evening.
A week later, Cen Li finally succeeded!
The morphology of deposited lithium on the MPDMS negative electrode proves that it has the advantage of preventing the formation of lithium dendrites.
After lithium plating/stripping for 10h at a current of 0.5mAcm-2 and a capacity of 0.25mAhcm-2, a typical lithium dendrite morphology appears on the blank lithium anode, which is caused by uneven lithium deposition and dissolution processes.
The SEI layer induced by the carbonate-based electrolyte is fragile and cannot withstand the huge volume fluctuations during the lithium deposition/stripping cycle, resulting in SEI rupture and lithium dendrite growth. This explains the short circuit of the battery with blank lithium anode in a short period of time.
Phenomenon.
The MPDMS-10 anode benefits from a relatively uniform lithium deposition process. The lithium deposition on the top surface remains uniform after cycling, and there is no growth of lithium dendrites.
Coarse-grained molecular dynamics verified the impact of SEI uniformity on the morphology of deposited lithium metal: the more uniform the SEI, the denser and more uniform the configuration of the deposited lithium generated. This result is consistent with the experimental results.
This result made her smile with satisfaction.
After saving all the data, Cen Li cleaned the laboratory and made sure everything was the same as when it was borrowed. Then she closed the door and went to find Cai Guozhong.
Cai Guozhong was a little surprised when Cen Li came to return the key, and asked with a kind smile, "Have you finished the experiment?"
Cen Li nodded, "Well, the problem of lithium dendrites has been solved."