Studies have shown that one of the important reasons for the explosion of ordinary lithium-ion batteries is that because the electrolyte of traditional lithium batteries is an organic liquid, side reactions can occur at relatively low temperatures, gases are generated, and explosions can occur after expansion. In response to this situation, researchers from Stanford University in the United States used artificial intelligence and machine learning methods to find about 21 solid electrolyte materials that could hopefully completely solve this problem.
The team recently published their findings in the Journal of Energy and Environmental Sciences. The article shows that scientists did not use traditional methods for random testing of individual compounds to find new solid electrolyte materials, but instead used artificial intelligence and machine learning to construct predictive models from experimental data. They trained a computer algorithm based on existing data to learn how to identify compounds. This process and face recognition algorithm, after observing a few examples, is very similar to the process of identifying faces.
The first author of the paper, the leader of the study, and a doctoral student in applied physics, Austin Sendek, said: “The number of existing lithium-containing compounds is tens of thousands, and the vast majority are untested. Some of these may be It is a conductor with excellent performance.We have developed a computational model to learn from our existing limited data and select suitable materials from large-scale databases.The speed of this screening method is millions of existing screening methods. Times."
In order to design this model, Austin Sendek spent almost two years collecting almost all scientific data on solid compounds containing lithium, and then used these data to treat the stability, cost, richness, and lithium ion conductivity of selected solid compounds. Many physical and chemical properties such as sex were evaluated, and finally 21 kinds of the most suitable solid electrolyte materials were selected.
Austin Sendek said: “We screened more than 12,000 compounds containing lithium and eventually found 21 ideal materials for use as a solid electrode. Screening took only a few minutes. I spend most of my time actually using Collect and manage all data and develop more reliable metrics for predictive models."
The researchers plan to test these 21 materials in a laboratory environment in the future to further confirm whether they are the best choices in reality.
For the significance and future of this research, another paper author, Evan Reed, assistant professor of materials science and engineering, said: “Our program can handle many issues related to materials and help increase research investment in this area. With the increase of data volume and the improvement of computer performance in the real world, our ability to innovate will increase exponentially.Either lithium batteries, fuel cells or other kinds of batteries, research in this field will have great significance. â€
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