Hierarchical Nanocapsules of Cu-Doped MoS₂@H-Substituted Graphdiyne for Magnesium Storage

Abstract

Hierarchical nanocomposites, which integrate electroactive materials into carbonaceous species, are significant in addressing the structural stability and electrical conductivity of electrode materials in post-lithium-ion batteries. Herein, a hierarchical nanocapsule that encapsulates Cu-doped MoS 2 (Cu-MoS 2 ) nanopetals with inner added skeletons in an organic-carbon-rich nanotube of hydrogen-substituted graphdiyne (HsGDY) has been developed for rechargeable magnesium batteries (RMB). Notably, both the incorporation of Cu in MoS 2 and the generation of the inner added nanoboxes are developed from a dual-template of Cu-cysteine@HsGDY hybrid nanowire; the synthesis involves two morphology/composition evolutions by CuS@HsGDY intermediates both taking place sequentially in one continuous process. These Cu-doped MoS 2 nanopetals with stress-release skeletons provide abundant active sites for Mg 2+ storage. The microporous HsGDY enveloped with an extended π-conjugation system offers more effective electron and ion transfer channels. These advantages work together to make this nanocapsule an effective cathode material for RMB with a large reversible capacity and superior rate and cycling performance.

Pseudocapacitive Vanadium Nitride Quantum Dots Modified One-Dimensional Carbon Cages Enable Highly Kinetics-Compatible Sodium Ion Capacitors

“…The electrodes of three samples were all obtained from cutting the nanofibers film into circular pieces with a diameter of 12 mm and an average mass of 0.8− 1.1 mg. Additionally, the assembling and electrochemical measurements of 2032-type half-batteries and SIHC full cells were all conducted as in our previous work. 2 Thereinto, the anodes used in SIHC full cells were preactivated for five cycles and discharged to 0.01 V at 0.1 A g −1 in half-batteries. The ratio of VNQDs@PCNFs-N/F anode to APCNFs-N/F cathode is optimized to be 1:3.…”

“…With the increasing concerns on energy crisis and environmental pollution, clean energy utilization and electrochemical energy storage have become exigent tasks of human society. , Sodium ion hybrid capacitors (SIHCs) elaborately integrate the merits of high energy density of batteries and high output power of capacitors, holding enormous possibilities for future generations of energy storage equipment. However, the mismatch of kinetics between anode and cathode is still the biggest obstacle which severely hampers the development of high-performance SIHCs. − For the purpose of overcoming this obstacle, improving kinetics compatibility of anode/cathode by rationally constructing anode materials with pseudocapacitive superiorities for rapid charge storage would be valid yet remains a huge challenge thus far.…”

Recent Progress in Phase Regulation, Functionalization, and Biosensing Applications of Polyphase MoS2

“…fabricated layered nanocapsules with Cu‐doped MoS 2 inside. [ 139 ] This unique doped nanostructure provided rich active sites for Mg 2+ storage. Xu et al.…”

“…[138] Zhuo et al fabricated layered nanocapsules with Cu-doped MoS 2 inside. [139] This unique doped nanostructure provided rich active sites for Mg 2+ storage. Xu et al prepared V-intercalated MoS 2 (V-MoS 2 ) by the simple hydrothermal process.…”

Designing anisotropic inorganic nanocapsules via self-assembly of polymer-like ultrathin Au nanowires

“…The hollow nanocapsule is one of the most attractive nanostructures due to its specific morphology and great functionality, and is a perfect small vessel to load, store, isolate, protect, and control the release of the filler inside just like a macroscopic capsule. [1][2][3][4] By decorating or modifying the shell of the nanocapsule, it can have additional properties, such as hydrophilicity (or hydrophobicity), static electricity, targeting ability, and so on. Therefore, it usually serves as a carrier for drugs or other functional molecules, showing tremendous potential for application in drug-controlled release, food preservation and antibacterial activity, industrial energy storage, and other fields.…”