Journal
ACS NANO
Volume 16, Issue 3, Pages 3955-3964Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.1c09405
Keywords
dual-template; hydrogen-substituted graphdiyne; nanocapsule; multiple geometries; rechargeable magnesium battery
Categories
Funding
- National Natural Science Foundation of China [22005246]
- Fundamental Research Funds for the Central Universities [D5000210606]
- King Abdullah University of Science and Technology (KAUST)
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Hierarchical nanocapsules containing Cu-doped MoS2 nanopetals enclosed in carbonaceous nanotubes have been developed for rechargeable magnesium batteries. These nanocapsules exhibit excellent energy storage performance and efficient electron/ion transfer channels.
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 MoS2(Cu-MoS2) 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 MoS2 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 MoS2 nanopetals with stress-release skeletons provide abundant active sites for Mg2+ storage. The microporous HsGDY enveloped with an extended pi-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.
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