Popcorn in addition to eating can do? Recently, Yangzhou University Environmental Engineering Laboratory, Yangzhou University, Dr. Hou Jianhua team of doctors make use of popcorn made of 'super battery' within 3 minutes can be fully charged, is expected to overcome the electric vehicle mileage Short, charging a long development bottleneck.The inspiration comes from his daughter when eating popcorn questions.
Why popcorn so crisp?
Daughter asked him for inspiration
With the development of renewable clean energy, matched with the energy storage device research is also more and more attention.Hu Jianhua introduction, supercapacitor as a new energy storage device, because of its high power density, stability and long Cycle life and other advantages, has gradually into people's lives. 'Carbon material because of its lower cost and the ideal electrochemical properties of the electrode material to become the first choice for supercapacitors traditional carbon materials such as graphite, activated carbon and other capacity is limited, very large To a certain extent, limits the application of electrochemical energy storage devices in real life and hinders the progress of supercapacitors as the main power source.Therefore, the microstructure and chemical composition of carbon materials are regulated to improve the electrochemical properties of carbon materials Performance is very necessary. '
According to Hou Jianhua, the existing control methods such as hard template method and physical activation method can only control a certain feature of porous carbon, and the operation is usually more complicated and costly, and is devoted to developing a simple, Green, scalable methods, the precise design of the structure of porous carbon to obtain high energy density and power density of the super capacitor, Professor Hou's research direction.
'Why is popcorn so crispy?' Asked a daughter when eating popcorn, gave Hou Jianhua inspiration, he remembered from corn to popcorn microstructure changes. 'Popcorn has a porous nature, can you put the explosion Rice flower as a super capacitor material, to store energy?
Now inspired by her daughter, Dr. Hou and her team have prepared popcorn-based carbon sheets with a honeycomb structure of 'superhigh' specific surface area and have been given the highest energy density in biomass carbon materials Capacitor device.
Popcorn how much energy?
Electric vehicles can be fully charged within 3 minutes
How to store energy popcorn? Hou Jianhua introduced corn microwave radiation for 8 minutes into fluffy popcorn, popcorn volume than corn particles to expand 20 times, the explosion formed a honeycomb structure, further activation can Derivatized porous carbon nanosheets (a porous material formed after microwave irradiation and reactivation of popcorn).
"Popcorn honeycomb structure with super high surface area and perfect aperture, a small piece of material will be able to store a large amount of power inside its fluffy porous, greatly improving the storage capacity of super-battery." Hou Jianhua said.
It is understood that popcorn-based battery energy density has been reported in the highest value of biomass-derived carbon materials.Experimental results show that the use of popcorn made of super battery can be fully charged within 3 minutes, after 10,000 times the capacity after charging and discharging Still more than 95%. It is very promising to overcome the bottleneck of the short-term development of electric vehicles and the long charging time so as to meet the urgent needs of the major power sources for electric vehicles.
What material can do super battery?
Lantern fritters and other materials can be tofu
In addition to popcorn, Hou Jianhua also made supercapacitors through other 'green materials' such as lanterns, tofu, straw and dough sticks.
These materials have the same principle as popcorn, such as a lantern, which is small when not in use, fluffy after it is opened, and space available for storing small holes. This is a very Chinese technology. '
'The best technology should come from living. Where there are so many traditional Chinese cultural symbols that we can learn from, I just want to start with the traditional Chinese culture and bring our science and technology to the world,' said Hou Jianhua.
At present, this important research achievement is published in ACS Applied Materials & Interfaces international academic journal, and is concerned by the American Chemical Society.The research work has also been supported by the National Natural Science Youth Fund, the Provincial Natural Science Youth Fund, the University Science and Technology Innovation Fund and other projects stand by.
