According to foreign media reports, in an inter-university research project led by the Hong Kong University of Science and Technology (HKUST), an environmentally friendly rechargeable liquid fuel was successfully developed, which is expected to cause a sensation worldwide. The fuel can fully charge electric vehicles in a few minutes, which will be a major advancement in existing battery technology, because the existing battery technology still needs hours to fully charge the car.
This kind of fuel is called "e-fuel". If it is charged by solar energy or wind energy, it is a carbon-neutral fuel. Like fossil fuels, this fuel can be easily sent to the grid and can quickly charge cars.
The study, titled "Making Rechargeable Electronic Fuel for Fixed Power Sources and Electric Vehicles," was led by Professor ZHAO Tianshou of the Hong Kong University of Science and Technology and supported by scholars from the University of Hong Kong, the Chinese University of Hong Kong and the Hong Kong Polytechnic University.
Professor Zhao explained: "We have successfully developed a stable lithium-sulfur battery with high energy density and the ability to store energy at low cost, which can be applied to electric vehicles and the transmission of large amounts of solar and wind energy. Power grid. For us, the happiest thing is to convert the lithium-sulfur battery into a flowing system, that is, electronic fuel. "
The electronic fuel system inherits the chemical characteristics of lithium-sulfur batteries, and has the advantages of large lithium metal capacity and low cost of sulfur cathodes. Although the research team has made great progress in developing electronic fuels, they still have many challenges to overcome. First of all, dendrites will form on the surface of lithium, which will shorten the battery life. Secondly, the discharged sulfur will dissolve and diffuse, destroying the lithium anode.
Associate Professor CHEN Qing, who participated in the project with Professor Zhao, said: "There is a solution that uses a porous lithium anode to protect its surface, but it requires a very laborious process to achieve. Therefore, we adopted thermodynamics through two spontaneous reactions. , A porous lithium anode is formed on the carbon skeleton, and a protective composite layer is covered on its surface. "
This simple and efficient method makes the high-load lithium-sulfur battery achieve the best performance record. The load is the amount of active material contained in each area of ​​the device. The higher the load, the higher the theoretical performance can become. High performance system. (Author: Yuqiu Yun)
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