According to foreign media reports, researchers from Penn State in the United States and two Chinese universities (Minjiang College and Guizhou College of Education) said that a new type of supercapacitor based on manganese oxide has been developed to reduce the storage capacity of the battery. The combination of high power and fast charging features of other supercapacitors.
Huanyu "Larry" Cheng, assistant professor of engineering science and mechanics at the Pennsylvania State University Institute of Materials, said: "Manganese oxide is undoubtedly a promising material. By combining with cobalt manganese oxide, a heterogeneous structure is formed. We can Adjust the interface performance in this structure."
The research team first conducted simulation experiments to observe how the performance of manganese oxides combined with other materials changed. When manganese oxide is coupled to a semiconductor, a conductive interface can be formed, and the resistance used to transport electrons and ions is very low. This is very important, otherwise the charging speed of the material will be very slow.
Visiting scholar Cheng Zhang said: "Exploring the use of manganese oxide with cobalt-manganese oxide as the positive electrode and the use of a graphene oxide as the negative electrode can produce an asymmetric supercapacitor, and the energy of the supercapacitor The density and power density are very high, and it also has good charge and discharge cycle stability."
The research team compared the supercapacitors developed with other supercapacitors and found that both the energy density and power were higher. And the researchers believe that by increasing the lateral size and thickness of the material, this material may be used in electric vehicles. So far, the researchers have not tried to expand the scale of the material. Next, they plan to adjust the interface so that the semiconductor and conductive layers can meet better performance. The researchers hope to apply the supercapacitor to flexible wearable electronic devices and sensors to power such devices or directly use them as self-powered sensors. (Yu Qiuyun)
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