A team of martial arts college students has developed high-performance materials that will increase the range of new energy vehicles

Jimu News Reporter Xiao YangCorrespondent Ouyang YimingNew energy vehicles are an important direction for the transformation, upgrading, and green development of the global automotive industry, and also a strategic choice for the high-quality development of China's automotive industry. Higher capacity, faster charging, and longer lifespan batteries are important driving forces for the development of new energy vehicles

Jimu News Reporter Xiao Yang

Correspondent Ouyang Yiming

New energy vehicles are an important direction for the transformation, upgrading, and green development of the global automotive industry, and also a strategic choice for the high-quality development of China's automotive industry. Higher capacity, faster charging, and longer lifespan batteries are important driving forces for the development of new energy vehicles. Recently, the research team of Wuhan University of Science and Technology has successfully developed a "high-performance lithium battery silicon carbon negative electrode material", which is suitable for various types of ultra-high capacity lithium batteries and is expected to greatly improve the range of new energy vehicles.

Team photo

The key to the endurance of new energy vehicles is to improve the energy density of the battery, while the current mainstream negative electrode material graphite is difficult to meet the demand for high capacity batteries. According to research, the theoretical capacity of silicon is as high as 4200mAh/g, with abundant reserves and environmental friendliness, and is recognized as the most promising negative electrode material for next-generation lithium-ion batteries. However, silicon can generate up to 300% volume expansion during lithium insertion, and most silicon carbon composite materials require high production costs and complex processes for nanosilicon.

The research team of Wuhan University of Science and Technology has lasted for 7 years, passed down three generations, applied for more than 20 invention patents, published more than 20 high-level papers, and achieved batch preparation of silicon carbon negative electrode materials in the range of grams, hundreds, kilograms, and hundreds of kilograms.

Team research

In 2016, under the guidance of their mentors, martial arts college students An Weiwei and Xiang Ben conducted research on micrometer porous silicon and developed high-performance porous silicon negative electrode materials, effectively solving the problem of silicon volume expansion and achieving stable preparation of high-performance porous silicon/graphite composite materials. Its core products have characteristics such as high capacity, low expansion, and long lifespan, making them suitable for high specific energy lithium-ion battery products.

The current student leader of this project, Xu Yifan, led the student team to participate in the technology competition with the project "Vanguard of Negative Electrode - Leader of High Performance Lithium Battery Silicon Carbon Negative Electrode Materials". They won the national silver award in the 13th "Challenge Cup" China University Student Entrepreneurship Plan Competition, the bronze award in the 9th Youth Creation China Youth Innovation and Entrepreneurship Competition, and the gold award in Hubei Province in the 9th "Internet+" University Student Innovation and Entrepreneurship Competition. With outstanding performance in science and technology competitions, Xu Yifan has been awarded honorary titles such as "Qinhu Maker", "President Medal", and "Outstanding Graduate" at Wuhan University of Science and Technology, and has continued his research at Wuhan University of Science and Technology.

Xu Yifan

Xu Yifan

(Image provided by the correspondent)

(Source: Jimu News)

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