The team of professor Wang Bo of Hebei University of Science and Technology, in cooperation with professor Wang Wei of Beijing University of Aeronautics and Astronautics, Dr. Xi Kai of the University of Cambridge, and others, have made important progress in the field of porous carbon anode materials for potassium ion batteries. Related studies have recently been published in the Journal of Materials Chemistry.
Potassium ion batteries have become a research hotspot in the field of energy storage due to their abundant reserves, low prices, and low oxidation-reduction potential. It is expected to become an alternative energy storage system for lithium ion batteries. However, due to the large radius of potassium ions, the cycle stability and rate performance of potassium ion batteries are poor, which seriously limits their further development. The research team used biomass materials as raw materials and successfully prepared a porous carbon microtube array with a higher specific surface area and chemical stability through a cost-effective low-temperature hydrothermal and high-temperature carbonization process to prepare potassium ion carbon anode materials. Provides new ways.
According to reports, as a negative electrode material for potassium ion batteries, the formation of porous carbon microtubes not only expands the interlayer spacing, but also can effectively release the axial and radial stresses generated during the insertion / deintercalation of potassium ions, significantly improving the rate of potassium ion batteries Performance and cycle stability. (Reporter Gao Wen's correspondent Ren Wenhai)
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