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The aforementioned team of scientists is from the Nanoscience and Technology Center of the University of Central Florida (UCF). Their research papers were published in the international academic journal ACS NANO in mid-October. The academic journals are sponsored by the American Chemical Society.
Experts say that this kind of flexible supercapacitor can charge the mobile phone for only a few seconds and can maintain the power for more than one week.
Nitin Choudhary, a postdoctoral fellow at UCF's research team, said that if this newly developed flexible supercapacitor can replace the previous ordinary battery, it will no longer have less capacity for mobile phones to store, and it will be troublesome to recharge it frequently. The supercapacitor can charge the phone for only a few seconds and can maintain the power for more than one week. At the same time, the product can be repeatedly charged more than 30,000 times almost no loss, and the current general lithium-ion battery can only guarantee that the battery performance will not be reduced within 1500 charge.
Lithium-ion batteries are widely used because of their light weight, but their low energy density, resulting in low energy storage, has also plagued the industry. UCF's research team is aware of this issue in the research, so they intend to make a fuss on high-power supercapacitors.
At present, the main research method in this industry is the use of new nanomaterials to improve the performance of supercapacitors. Previously, scientific research teams used graphene and other two-dimensional materials with high electricity storage performance to prepare supercapacitors, but the performance of capacitors has been limited to improve. The UCF research team also tried to use two-dimensional materials with only a few atomic thicknesses, but the results were not satisfactory. This is mainly because there are some problems with the way these two-dimensional materials are incorporated into existing systems.
According to Yeonwoong Jung, chief researcher of the UCF research team, UCF nano science and technology center and assistant professor of material science and engineering, “Our research team has currently developed a simple chemical synthesis method that can be used effectively The materials and the two-dimensional materials are integrated.†Jung also said that no one has been able to realize the potential of two-dimensional materials before his team developed this new preparation method.
Specifically, the ultracapacitor developed by the UCF team is mainly composed of millions of nanowires, and a layer of two-dimensional material is sprayed on the surface of the supercapacitor to prepare a core-shell type super capacitor. Capacitors. This supercapacitor has a core with ultra-high conductivity, allowing the battery system to rapidly perform electron transfer, thereby enabling rapid charging and discharging. Supercapacitors with two-dimensional material shells can significantly increase the energy of the battery system and increase its power density.
According to Choudhary, “For small electronic devices, the materials we produce have been world-leading in terms of energy density, power density, and cycle stability, well beyond conventional standards.â€
For example, the cycle stability data can reflect how many times the battery is charged and the battery performance begins to decrease. Ordinary lithium-ion batteries can guarantee that the battery performance will not be reduced within a maximum of 1,500 charge cycles; other two-dimensional material supercapacitors currently researched and developed can be recharged several thousand times without degradation in battery performance; and the UCF team has developed This new type of super capacitor has no battery performance degradation after charging 30,000 times.
Supercapacitors can be used in mobile phones and other electronic devices, even electric cars. At the same time, the new supercapacitors are flexible, increase the range of possible applications, and can be combined with wearable devices.
At present, Jung is working with the UCF's Technology Transfer Office to apply for invention patents for this new technology. "It is not yet ready for commercialization," said Jung, but the technology developed by his team will have a huge impact on many other research and technologies.
(Original title: A new type of flexible super battery comes out: You can use a mobile phone for a few seconds to charge)
Scientists develop new supercapacitors
[China Instrument Network Instrument Development] Do you worry about charging the phone everyday? Recently, a team of American scientists developed a new supercapacitor preparation technology that may solve your troubles in the future.