"That's right." Yang Dingding nodded, and then asked, "Do you know how lithium-ion batteries work?"
"I know." Cen Li nodded and said, "Lithium-ion batteries are mainly composed of positive electrode materials, negative electrode materials, electrolytes and separators. They rely on the charging and discharging of Li between the two electrodes to embed and deintercalate back and forth."
"It is because of this that when lithium batteries are overcharged and during the charge and discharge cycle, the lithium deposition on the surface of the negative electrode will be uneven and dendrites will easily form. At this time, the lithium dendrites will grow significantly. When the dendrites fall off or break, "dead" will occur.
Lithium", causing the irreversibility of lithium."
Yang Jing explained in detail, "When sharp dendrites penetrate the separator, causing the positive and negative electrodes to short-circuit and be in a self-discharge state, accompanied by the generation of a large amount of heat, the lithium battery will catch fire or even explode."
After hearing this, Cen Li suddenly realized that this was the case.
She had always known that lithium batteries were dangerous, but she didn't know where the danger came from. Now she finally understands.
She continued, "So, if you want to improve the safety of lithium batteries, it is very important to solve the problem of lithium dendrites."
Yang Jing showed admiration, "Yes, it's just that although all countries are currently thinking of solutions, they still don't have a clue."
Hearing this, Cen Li couldn't help but ask the system, [System, is there a solution to this lithium dendrite problem in the system mall?]
[Return to the host, yes, and the host has the qualification to redeem it. It requires 2000 knowledge points. Do you want to redeem it? 】
When Cen Li heard that it could be redeemed, she was immediately overjoyed, [Exchange, must redeem!]
She now has a lot of points and knowledge points, but she is afraid that she cannot exchange them. If she can exchange them, she will definitely exchange them.
[The exchange is successful, please check with the host.]
Cen Li touched the flash drive in her hand, feeling indescribably excited. She tried to calm down before saying, "Does our research institute have a laboratory to study lithium dendrites?"
Yang Jing looked at her with a smile, "Yes, why are you interested?"
Cen Li nodded and said, "Yes, I want to see what kind of lithium dendrites can make mobile phones explode."
Yang Jing did not reject him, but was very happy, "Scientific research begins with interest. This is a good thing. I will take you over to the laboratory."
Not long after, the two arrived at the Institute of Physics. The senior fellow in charge of lithium dendrite research was named Chen Ke.
He also knew about Cen Li and knew that she was known as Koi, so he welcomed her arrival very much.
Turning on the computer, Cen Li read the information provided by the system in detail.
The method given here is to create a solid electrolyte interface (SEI) on the surface of lithium metal through the adsorption and reactivity of thiol groups on lithium metal to stabilize the lithium metal positive electrode.
Using a simple dip-coating method, a protective layer is formed through MPDMS, which effectively inhibits dendrite growth and promotes stable cycling of lithium metal anodes.
This protective layer is formed by combining the thiol groups of MPDMS with lithium metal, making the artificial SEI rich in inorganic components, thus stabilizing the SEI structure and conducive to charge transfer on the lithium surface.
As for the experimental method, the first thing she needs to do is to improve the MPDMS material. This is required by the system. Of course, the method of improvement is also informed.
It's just that it's a bit difficult for her, a newbie in materials science.
Even with systematic guidance, she still learned many details while experimenting.