The raw materials come from the iron ore, carbon, etc., which are abundant in reserves and can be synthesized at normal temperature and pressure without toxic or harmful gases. Recently, Professor Xia Hui from Nanjing University of Science and Technology successfully synthesized amorphous FeOOH / graphene composite nano Chip, this new new amorphous material will significantly reduce the cost of supercapacitors, greatly promote its commercialization.
The research of supercapacitor electrode materials has been focused on nanocrystalline materials all the time. However, the structure of nanocrystalline materials is difficult to expand or shrink, which limits the cycle life and fast charge-discharge performance of supercapacitors. At the same time, the synthesis of nanocrystalline materials is usually carried out at high temperatures, greatly increasing the production cost, and the process is complex, it is difficult to mass production, greatly restricting the widespread promotion of supercapacitors, currently only a small amount used in electric vehicles.
In recent years, researchers began to try to use amorphous materials for the electrode materials of supercapacitors. Compared to the crystalline material, the synthesis temperature of the amorphous material is lower, thus greatly reducing the cost of synthesizing the electrode material. Amorphous material structure is also more stable, the volume can be controlled. However, the fly in the ointment is that the poor conductivity of the amorphous material and the smaller specific surface area limit the supercapacitor performance to a certain extent. Therefore, the development of low-cost, mass production, high cycle life and rapid charge and discharge of new amorphous materials is the core of new energy storage science issues, but also the world's supercapacitors industrial production problems.
Liu Jiaqi and supervisor Professor Xia Hui and other successfully synthesized amorphous FeOOH / graphene composite nanosheets, green synthesis method is simple and easy. The composite electrode material shows excellent supercapacitor performance, high cycle life, fast charge and discharge.
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