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US power storage technology research has made new progress
Yang Yang, an assistant professor at the University of Central Florida, has developed two power storage technologies. Professor Yang found that this revolutionary system can generate and store electricity at low cost and efficiently, and can solve environmental and energy crises. We try to convert solar energy into electricity or chemical fuels that convert chemical fuels into electricity. We try different methods, but all attempts are energy related. In 2015, Yang Yang, who was jointly employed by the Nanotechnology Center and the Department of Materials Science and Engineering, came to the University of Central Florida. A technology will upgrade existing electronic devices such as mobile phones and computers, as well as lithium batteries for electric vehicles. Another technology can provide a safer and more stable alternative to lithium batteries. The University of Central Florida published a paper in the academic journal Advanced Energy Materials, which stated that it designed a new electrode with superior conductivity, stable performance in high temperature environment and low production cost. More importantly, the battery quality will not deteriorate after thousands of uses of the lithium battery. Ions generate current from the negative terminal to the positive terminal through the electrolyte. Professor Yang’s research team developed a thin film battery positive electrode made of nickel sulfide and iron sulfide. This material gives the new electrode a huge advantage. First, it is highly conductive and has a higher conductivity than a mixture of nickel sulfide and iron sulfide. This film surface has a porous nanostructure. These small pore structures increase the area of ​​the chemical reaction. This technology is revolutionary. Most batteries degrade after repeated use. Even after a high-quality lithium battery is used for 300-500 times, the battery capacity begins to decrease. Experiments show that the battery of the nickel sulfide iron sulfide electrode began to degrade after 5000 times. Researchers Liang Kun and Kyle Marcus participated in the collaboration between Zhou Le, Li Yilun, Samuel, Nina, etc. from the University of Central Florida, Zhang Shoufeng from Jilin University, and Li Yilun from Rice University. Professor Yang's laboratory graduate students have developed a new catalyst that has many advantages over traditional catalysts. Metal air cells, fuel cells and other electrical energy conversion and storage rely on chemical reactions to generate electricity. Catalysts are required for these chemical reactions. The noble metals platinum, palladium and rhodium are all efficient catalysts, but the high cost, low stability and low durability make these precious metals difficult to commercialize. Niu Wenjun, Li Wei, and Marcus Kyle led a research team to develop a new production process to produce a graphene-based catalyst, a two-dimensional, highly conductive material with a thickness of only one atom. . According to the report of the new energy materials journal, they have confirmed on the zinc air battery that the nano-network structure catalyst can be charged and discharged multiple times. This electrocatalyst is safer and more stable than volatile compounds in lithium batteries. Even in the event of rain, extreme temperatures and other harsh environments can work stably. This catalyst does not require precious metals and is less expensive to produce. (Compile: China Superhard Materials Network)