Professor Chen Gang of the HIT Group to develop a new structure of lithium battery materials electric vehicles may be able to charge quickly

Nowadays, electric cars are becoming more and more popular. Electric cars save energy and are more manageable than fuel cars, but they also have a hard injury: charging and endurance problems. Recently, the energy conversion materials team led by Professor Chen Gang of the HIT made important progress in the study of negative electrode materials for lithium ion batteries. It is expected that electric vehicles will quickly store and output electrical energy. The research was published in Advanced Materials, the top journal in the field of materials science, and was selected as the current cover article.

In recent years, lithium-ion batteries have gradually become the mainstream power source of portable electronic equipment and are considered to be the most promising power sources for electric vehicles and hybrid electric vehicle drivers. In addition, lithium-ion batteries can store and convert green energy such as solar energy and wind energy to ease the intermittent and unstable nature of the above-mentioned green energy and achieve a balance between energy supply and demand.

At present, the demand for lithium-ion batteries in many fields is increasing, and the capacity of traditional electrode materials and the ability of rapid charging and discharging have reached a bottleneck. It is urgent to develop electrode materials with high power charge and discharge ability to meet effective and fast energy storage and output.

Chen Gang's team took the lead in proposing a "two-dimensional nano-fluid" structure to increase the charging and discharging speed of materials. The team prepared nano-scale sheets and assembled them into layers of self-supporting stacked structures. Electrochemical tests show that the Ionic conductivity of nano-wires is several orders of magnitude higher than that of bulk materials, and the charging and discharging properties of batteries are greatly improved. This research points out a new direction for improving the charge and discharge performance of electrode materials, and provides a new exploration idea for constructing high power and high stability lithium-ion batteries.

The research work was supported by the National Natural Science Foundation and Professor Yuguihua of the University of Texas at Austin.

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