Publications by authors named "Fu-Zhi Cui"
Article Synopsis
- Lithium-sulfur (Li-S) batteries show great potential for energy storage but face challenges due to the shuttling effect of polysulfides, which leads to active material loss.
- Researchers are exploring the impact of surface engineering in covalent organic polymers (COPs) to enhance the performance of Li-S battery cathodes.
- Improved pore surface polarity and nano-confinement effects in COPs have resulted in significant performance gains, leading to high Coulombic efficiency and minimal capacity decay over numerous cycles, offering insights for future battery material design.
Article Synopsis
- Lithium-sulfur (Li-S) batteries are attracting attention due to their high theoretical capacity and energy density, but polysulfide shuttling negatively impacts their performance.
- A new two-dimensional covalent organic framework (COF) has been developed to load sulfur efficiently (88.4 wt%), significantly enhancing Li-S battery performance with almost complete capacity release and high Coulombic efficiency (98.0%).
- Structural analysis suggests that the COF's high conjugation and appropriate spacing contribute to its effectiveness, offering insights for future designs to mitigate polysulfide shuttling in electrochemical energy storage.
Constructing two-dimensional (2D) polymers with complex tessellation patterns via synthetic chemistry makes a significant contribution not only to the understanding of the emergence of complex hierarchical systems in living organisms, but also to the fabrication of advanced hierarchical materials. However, to achieve such tasks is a great challenge. In this communication we report a facile and general approach to tessellate 2D covalent organic frameworks (COFs) by three or four geometric shapes/sizes, which affords 2D COFs bearing three or four different kinds of pores and increases structural complexity in tessellations of 2D polymers to a much higher level.
View Article and Find Full Text PDFNew linkage chemistry will endow covalent organic frameworks (COFs) with not only structural diversity but also fascinating properties. However, to develop a new type of linkages has been a great challenge. We herein report the first two COFs using aminal as the linkages.
View Article and Find Full Text PDFA tetraphenylethene-based 2D covalent organic framework (COF) has been synthesized. It exhibits a very fast response and high sensitivity to the presence of gaseous HCl by way of distinct changes in fluorescence emission and color, which makes the COF a good chemosensor for spectroscopic and naked-eye detection of gaseous HCl.
View Article and Find Full Text PDFArticle Synopsis
- Covalent organic frameworks (COFs) are advanced porous materials formed through reticular chemistry, but creating complex structures remains challenging due to limited strategies.
- A new method combining vertex-truncation and a multi-linkage strategy has been developed to successfully design COFs with three types of pores.
- The synthesis of a "V"-shaped building block led to the formation of two unique COFs, TP-COF-DAB and TP-COF-BZ, confirmed through various analytical techniques, and an innovative transformation between these COFs was achieved for the first time.