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Narrow Directed Black‐Phosphorus Nanoribbons
The preparation of high‐quality narrow black phosphorus nanoribbons (PNRs) aligned along the same direction is very challenging. In article number 2207538, Changxin Chen and co‐workers develop a reformative mechanical exfoliation approach combining tape and polydimethylsiloxane (PDMS) exfoliations to fabricate high‐quality, narrow and directed PNRs with...
Black phosphorus nanoribbons (PNRs) are ideal candidates for constructing electronic and optoelectronic devices owing to their unique structure and high bandgap tunability. However, the preparation of high‐quality narrow PNRs aligned along the same direction is very challenging. Here, a reformative mechanical exfoliation approach combining tape and polydimethylsiloxane (PDMS) exfoliations to fabricate...
Reversible electrochemical intercalation of cations into the interlayer space of 2D materials induces tunable physical and chemical properties in them. In MXenes, a large class of recently developed 2D carbides and nitrides, low intercalation energy, high storage capacitance, and reversible intercalation of various cations have led to their improved performance in sensing and energy storage applications...
In article number 2004925, Yan Yu, Yanglong Hou, and co‐workers report a hierarchical porous Na3V2(PO4)2O2F hollow nanosphere material with fast ionic/electronic conductivities, easy and continuous electrolyte supplement and robust electrode integrity properties, kinetically accelerated sodium‐ion storage behavior of high‐capacity, high‐rate and long‐life cycling.
Sodium‐ion batteries (SIBs) are receiving considerable attention as economic candidates for large‐scale energy storage applications. Na3V2(PO4)2O2F (NVPF) is intensively regarded as one of the most promising cathode materials for SIBs, due to its high energy density, fast ionic conduction, and robust Na+‐super‐ionic conductor (NASICON) framework. However, poor rate capability ascribed to the intrinsically...
Free‐standing electrodes with high energy density and long life are of critical importance to the development of lithium‐ion batteries (LIBs) for flexible/wearable electronic devices. Herein, the free‐standing and foldable V2O3/multichannel carbon nanofibers (V2O3/MCCNFs) composites are prepared via electrospinning and subsequent carbonization. Such V2O3/MCCNFs electrode delivers a superior capacity...
Single‐atom catalysts have become a hot spot because of the high atom utilization efficiency and excellent activity. However, the effect of the support structure in the single‐atom catalyst is often unnoticed in the catalytic process. Herein, a series of carbon spheres supported Ni–N4 single‐atom catalysts with different support structures are successfully synthesized by the fine adjustment of synthetic...
In article number 2003943, Hongfang Li, Rong Cao, and co‐workers successfully synthesize a hollow mesoporous carbon sphere loaded Ni–N4 single‐atom catalyst that exhibits superior catalytic activity toward CO2 electrocatalytic reduction. The geometrical structure of carbon support is verified to affect the CO2 reduction reaction performance greatly. The ultrathin carbon shell and the 7–10 nm mesopores...
In article number 1901995, Yanglong Hou and co‐workers demonstrate a simplistic, scalable and general synthesis strategy employing various combinations of binary transition metal selenides (B‐TMSs) with high surface area and hierarchical nanosheet structures as promising anodes for sodium ion batteries (SIBs). Representative B‐TMSs anodes present adequately high energy capacities, excellent rate capabilities...
Multiple transition metals containing chalcogenides have recently drawn boosted attraction as anodes for sodium ion batteries (SIBs). Their greatly enhanced electrochemical performances can be attributed to the superior intrinsic conductivities and richer redox reactions, comparative to mono metal chalcogenides. To employ various binary metals comprising selenides (B‐TMSs) for SIBs, discovery of a...
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