Using graphene to build "ceilings and floors for high-rise buildings", using boron nitride nanotubes as "walls and columns" to separate "rooms" for hydrogen atoms to live in - this is a possible new application developed by American scientists. Future energy storage materials for new energy vehicles.
In order to make hydrogen a practical fuel for light vehicles, the US Department of Energy has set standards for storage materials: the current goal is to develop economical storage media in which the hydrogen storage mass exceeds 5.5% of the mass of the storage media at room temperature per liter of hydrogen. The capacity exceeds 40 grams; the long-term goal is 7.5% of the quality index and 70 grams per liter of capacity.
Scientists at Rice University in the United States reported in the new issue of the American Chemical Society’s Langmuir magazine that new materials developed with boron nitride nanotube-supported graphene layer structures are expected to achieve or exceed the above long-term goals and may become future New energy vehicles are ideal materials for hydrogen storage.
Using a computer model, the researchers measured the strength and toughness of the columnar graphene layers, and then added boron nitride nanotubes between the graphene layers to simulate a unique three-dimensional structural model that could store hydrogen atoms.
To test the optimal state of hydrogen storage and release, the researchers added oxygen or lithium to the new structure for experiments. The results showed that at room temperature and atmospheric pressure, the new material added with oxygen is more capable of binding hydrogen atoms, the quality index has reached 11.6%, and the capacity index is 60 grams per liter.
The researchers said that this new material has a very durable structure and can easily meet the US Department of Energy’s goal of charging and discharging 1,500 hydrogen fuel tanks.
Just as looking for the “best shot point†on a racket, researchers are currently using computer models to constantly test new variables to find material performance (area, weight) and environmental performance indicators (temperature, pressure) as quickly as possible. Balanced, eventually reaching the ideal state, and "the advantage of the computer model is that it can be completed within a few days to complete the work of the experiment." (Reporter Guo Shuang)
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