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Highly anticipated potassium metal batteries possess abundant potassium reserves and high theoretical capacity but currently suffer from poor cycling stability as a result of dendritic growth and volume expansion. Here, carbon cloths modified with different functional groups treated with ethylene glycol, ethanolamine, and ethylenediamine are designed as 3D hosts, exhibiting different wettability to...
It is an urgent problem to realize reliable microwave absorption materials (MAMs) with low density. To address this issue, a series of controlled experiments w ere carried out, which indicated that the tubular structure enables excellent microwave absorption properties with a lower powder filling rate. This performance is attributable to the combined dielectric and magnetic loss mechanisms provided...
Photosensitive materials, such as energetic complexes, usually have high sensitivity and cause heavy‐metal pollution, whereas others, like carbon black and dye, do not contain energy, which affects energy output and mechanical properties. In this work, donor–acceptor π‐conjugated energetic catalysts, denoted as D‐n, are designed and synthesized. Nonmetallic hybrid energetic composites are prepared...
Metal‐Free Hybrid Energetic Composites
Donor–acceptor π‐conjugated energetic catalysts, denoted as D‐n, are developed, and nonmetallic hybrid energetic composites are prepared by assembling the as‐synthesized catalysts into multiscale ammonium perchlorate (AP), which can be ignited without the involvement of metals. At the voltage of 1 kV, the laser‐ignition delay time of D‐2/AP decreases from 56...
Carbon fiber precursor materials, such as polyacrylonitrile, pitch, and cellulose/rayon, require thermal stabilization to maintain structural integrity during conversion into carbon fiber. Thermal stabilization mitigates undesirable decomposition and liquification of the fibers during the carbonization process. Generally, the thermal stabilization of mesophase pitch consists of the attachment of oxygen‐containing...