Synthesis and Electrochemical Performance of SnO x Quantum Dots@ UiO-66 Hybrid for Lithium Ion Battery Applications
A novel method that combines the dehydration of inorganic clusters in metal–organic frameworks (MOFs) with nonaqueous sol–gel chemistry and pyrolysis processes is developed to synthesize SnO x quantum dots@Zr-MOFs (UIO-66) composites. The size of as-prepared SnO x nanoparticles is approximately 4 nm...
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Veröffentlicht in: | ACS applied materials & interfaces 2017-10, Vol.9 (40), p.35030-35039 |
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Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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Zusammenfassung: | A novel method that combines the dehydration of inorganic clusters in metal–organic frameworks (MOFs) with nonaqueous sol–gel chemistry and pyrolysis processes is developed to synthesize SnO x quantum dots@Zr-MOFs (UIO-66) composites. The size of as-prepared SnO x nanoparticles is approximately 4 nm. Moreover, SnO x nanoparticles are uniformly anchored on the surface of the Zr-MOFs, which serves as a matrix to alleviate the agglomeration of SnO x grains. This structure provides an accessible surrounding space to accommodate the volume change of SnO x during the charge/discharge process. Cyclic voltammetry and galvanostatic charge/discharge were employed to examine the electrochemical properties of the ultrafine SnO x @Zr-MOF (UIO-66) material. Benefiting from the advantages of the smaller size of SnO x nanoparticles and the synergistic effect between SnO x nanoparticles and the Zr-MOFs, the SnO x @Zr-MOF composite exhibits enhanced electrochemical performance when compared to that of its SnO x bulk counterpart. Specifically, the discharge-specific capacity of the SnO x @Zr-MOF electrode can still remain at 994 mA h g–1 at 50 mA g–1 after 100 cycles. The columbic efficiencies can reach 99%. |
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ISSN: | 1944-8244 1944-8252 |
DOI: | 10.1021/acsami.7b11620 |