The reporter learned from Hebei Agricultural University on November 28 that the school's School of Science, Dr. Xiao Zhichang led the team with the National Center for Nanoscience, Griffith University in Australia, Mapu Institute of Polymer Science in Germany, and Beijing University of Chemical Technology The scholars of the Innovation Center have worked together to carry out in-depth research on the micro-nano structural design of energy storage materials and made a series of breakthroughs. The relevant results have been published in the "Journal of Materials Chemistry" and "Research Report on Materials Science and Engineering Technology".
With the increasing pollution of the environment and the depletion of energy sources, the development of clean and renewable photo / electrochemical energy storage technologies is imminent. In recent years, smart grids, electric vehicles, smart mobile devices, photovoltaic power stations and other energy supply modes that use light energy and electrical energy as terminal energy sources have gradually penetrated into daily life. The micro-nano structure design and research of energy storage materials play a decisive role in promoting the progress and development of new energy storage equipment.
From the perspective of molecular synthesis and material structure design, the research team successfully prepared polypyrene-type carbon-rich polymer compounds with one-dimensional nanocapsule morphology through the rational selection of reactive monomers and chemical synthesis strategies. The diameter can be adjusted on a molecular scale. The researchers used this structure as a sulfur element carrier and used it as a buffer buffer for the stress change of the sulfur element during the charge and discharge process of lithium-sulfur batteries, and successfully achieved the preparation and application of electrode materials for high-performance and high-stability lithium-sulfur batteries. On this basis, starting from the chemical reaction of Schiff bases of aromatic dialdehydes and melamine, the team successfully realized a series of Schiff base type microporous organic compounds with different forbidden band widths using the steric hindrance effect between molecules The design and synthesis of polymers, and the use of electronic paramagnetic resonance, ultraviolet-visible diffuse reflectance spectroscopy and other technical methods, deeply reveal the reasons why different forbidden band widths have different responses to visible light and the intermediate mechanism of the catalytic process.
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