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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...
In article number 1907013, Changshui Huang and co‐workers directly prepare the methyl substituted graphdiyne nanothorn arrays (MGDY NTAs) on a variety of substrates by a one‐step method, which shows superhydrophobic properties, and high durability. The MGDY NTAs can be applied in the fields of metal corrosion protection and oil–water separation.
This study proposes a one‐step method for growing superhydrophobic carbon nanothorn arrays (NTAs) directly on various substrates. The fabricated carbon material (named methyl‐substituted graphdiyne (MGDY)) comprises sp and sp2 carbons in a conjugated‐backbone form, as well as methyl groups introduced into the framework as hydrophobic‐enhanced functional groups. MGDY NTAs exhibit excellent hydrophobicity...
Light‐ignited combustions have been proposed for a variety of industrial and scientific applications. They suffer, however, from ultrahigh light ignition thresholds and poor self‐propagating combustion of typical high‐energy density materials, e.g., 2,4,6,8,10,12‐(hexanitrohexaaza)cyclododecane (CL‐20). Here, reported is that both light ignition and combustion performance of CL‐20 are greatly enhanced...
In article number 1900338, Guangcheng Yang and co‐workers provide a direction to achieve high performance light‐ignited combustions by formulating composite energetic materials. A novel relay‐domino‐like combustion reaction in a graphene oxide/2,4,6,8,10,12‐(hexanitrohexaaza) cyclododecane (GO/CL‐20) composite can be ignited by an infrared laser pulse in the order of ten‐milliseconds. A synergistic...
An effective strategy to tackle the twin crises of global deforestation and fossil fuel depletion is to recycle biomass materials for energy storage devices. This study reports a unique and innovative solution to capitalize on a currently overlooked resource to produce high‐performance lithium–sulfur (Li–S) batteries from recycled paper. The recycled paper fibers are creatively composited with graphene...
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