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Cage-structured MxPy@CNCs (M = Co and Zn) from MOF confined growth in carbon nanocages for superior lithium storage and hydrogen evolution performance
- Source :
- Journal of Materials Chemistry A. 7:8443-8450
- Publication Year :
- 2019
- Publisher :
- Royal Society of Chemistry (RSC), 2019.
-
Abstract
- Metal phosphide-carbon nanocomposites with unique hollow structures are highly attractive in energy storage and conversion fields. Herein, we reported a novel strategy to construct cage-structured metal phosphide nanocomposites. A confined growth of imidazolate frameworks (ZIF-67 or ZIF-8) in carbon nanocages was reported for the first time; then, ZIF-67 or ZIF-8 was transformed in situ into metal phosphide nanocrystals through pyrolysis-phosphidation to form MxPy@CNCs (M = Co or Zn) with cage structures, i.e., MxPy cores were coated with N, P-doped double carbon shells. The cage-structured MxPy@CNCs achieved high reversible capacities (714.1 mA h g−1 for CoP@CNCs and 462.5 mA h g−1 for ZnP4@CNCs after 500 cycles at 2 A g−1) and excellent cycling performances (1215.2 mA h g−1 at 0.2 A g−1 for CoP@CNCs and 773.4 mA h g−1 for ZnP4@CNCs after 1000 cycles) when applied as anode materials for lithium-ion batteries. In addition, CoP@CNCs could serve as functional catalysts towards the hydrogen evolution reaction due to the synergistic effects of metallic CoP and N, P-doped carbon shells.
- Subjects :
- Materials science
Nanocomposite
Renewable Energy, Sustainability and the Environment
Phosphide
chemistry.chemical_element
02 engineering and technology
General Chemistry
021001 nanoscience & nanotechnology
Catalysis
Metal
chemistry.chemical_compound
Nanocages
chemistry
Chemical engineering
visual_art
Imidazolate
visual_art.visual_art_medium
General Materials Science
Lithium
0210 nano-technology
Carbon
Subjects
Details
- ISSN :
- 20507496 and 20507488
- Volume :
- 7
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Chemistry A
- Accession number :
- edsair.doi...........c3022de0d28926fb0c2bf3df32850657