Scientists in China have developed a new type of battery spore carbon storage energy
The research team of Xia Xinhui from the School of Materials Science and Engineering of Zhejiang University developed the first high-energy density lithium-sulfur battery based on mold spore carbon technology. They introduced mold spore carbon fermented from waste fruits and vegetables as energy storage materials into the energy field to obtain high energy density batteries. Its specific capacity is three times higher than the best battery on the market. It is expected to solve the problem of long-distance driving of electric vehicles in the future. In addition, it has many advantages in terms of cost and service life. This achievement was recently reported by the world's top materials journal "Advanced Materials".
"Lithium-sulfur battery is a new type of high energy density battery. It uses sulfur as the battery positive electrode and metallic lithium as the negative electrode. Its theoretical capacity is much higher than the current commercial lithium battery." Xia Xinhui introduced that sulfur has a high capacity density and sufficient energy. Be optimistic about the next generation battery material. However, the sulfur element alone has a fatal drawback, that is, the sulfur itself is insulated, and the intermediate products of the reaction will dissolve in the electrolyte and cause losses.
For a long time, the scientific community has been looking for a host for sulfur to fix the element of sulfur, and the research of Xia Xinhui's team also began. Out of curiosity, they did an experiment with two rotten oranges and accidentally opened the research direction. Researchers first cultivated the mold by fermentation, and then optimized its structure by using the pore-forming ability of nickel. After carbonization at high temperature, a brand-new mold spore carbon / nano-nickel phosphide composite material was prepared. Afterwards, it is merged with the element of sulfur. At a temperature of 155 degrees Celsius, the sulfur is melted and mixed with the carbon material in a molten state, and the carried sulfur enters the host.
The research results show that this brand new mold spore carbon / nano nickel phosphide benefits from its high porosity, high conductivity, large specific surface area and multiple sulfur storage sites, and can perform physical / chemical dual on intermediate products Adsorption can greatly improve battery performance. Not only that, if the waste grain fruits and vegetables can be re-fermented and used for the preparation of mold spore carbon materials, it can also achieve waste utilization and produce good economic benefits. (Zhao Yuna, Ke Yineng)
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