Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 945, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2023.169302
Keywords
Covalent organic framework; SnO2 nanoparticles; N-doped carbon; Lithium-ion battery; Composite anode
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Covalent organic frameworks (COFs) with metal complexing ligand COF-phen and COF-bpy have been designed and prepared. They can complex with Sn4+ to form COF-phen-Sn and COF-bpy-Sn. In this study, these metal ion complexed COFs are used as precursors for the preparation of composite materials SnO2 @NCNR-x with nano SnO2 embedded in N-doped carbonaceous materials. SnO2 @NCNR-1 shows high reversible specific capacity as an anode material for LIBs, due to its high specific area, highly dispersed SnO2 nanoparticles, and improved conductivity.
Covalent organic frameworks (COFs) with metal complexing ligand including COF-phen and COF-bpy have been designed and prepared, which can complex with Sn4+ to form COF-phen-Sn and COF-bpy-Sn, re-spectively. In this work, the metal ion complexed COFs are successfully employed as ideal precursors for the preparation of composite materials SnO2 @NCNR-x with nano SnO2 embedded within the rod-like N-doped carbonaceous materials. When employed as anode materials for lithium ion batteries (LIBs). SnO2 @NCNR-1 exhibited high reversible specific capacity (694.2 mA g-1 at 100 mA after 200 cycles, 506.5 mAh g-1 at 0.5 A g-1 after 600 cycles) owing to its high specific area, highly dispersed SnO2 nanoparticles and improved conductivity, recommending SnO2 @NCNR-1 to be a prospective candidate for LIBs.(c) 2023 Elsevier B.V. All rights reserved.
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