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Battery life and charging have always been lingering in our minds. We are always looking for places where we can charge, for fear that their smartphones are dead, and battery life has always been an important factor in our consideration of new phone purchases. Companies are looking for ways to improve battery performance. A few days ago, research teams from China and the United States have made a breakthrough discovery, which will bring people longer-term, better-performing batteries.
The battery under the new technology is 4 times longer than the battery in the current market. However, this does not mean that the charging time of this battery has also been extended to four times the current battery charging time. It is reported that the consumption of chemical substances in this new battery is slower than existing batteries.
It is understood that Dr. Wang Changan from Tsinghua University and Li Ju from the Massachusetts Institute of Technology have occasionally discovered this in the process of removing oxide coatings from aluminum nanoparticles.
Dr. Wang and Dr. Li are material scientists who have studied aluminum microparticles for a long time. Although this metal has good electrical conductivity, this conductivity decreases with the formation of surface oxides when exposed to air. This oxide is irrelevant for large objects, but for microparticles, it has to be very tight, so two researchers decided to find a way to remove the oxide layer on the surface of the nanoparticle.
Two researchers chose to immerse the particles in a mixture of sulfuric acid and titanium oxysulfate. This is done by turning the surface alumina into titanium oxide - the latter being more conductive. In this process, a group of aluminum nanoparticles that were forgotten in the acidic mixture "lived longer" than they had expected for several hours.
Through this experiment, researchers believe that aluminum with a titanium oxide protective layer can replace the graphite anode. In conventional lithium-ion batteries, the graphite anode expands and contracts during movement of lithium ions, but this can also be accompanied by a slow decay of the battery. Slowly, lithium ions form a compound on top of the electrode, and the battery begins to lose its charge capacity. The problem faced by batteries used in the current market is that the shape of the anode will change, and then it will get rid of the lithium compound layer formed on the top, which in turn will cause more lithium ions to be destroyed. However, this problem can be solved by replacing aluminum nanoparticles with titanium oxide.
It is not clear when such batteries can be commercialized.
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