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Structure and electrochemical properties of hierarchically porous carbon nanomaterials derived from hybrid ZIF-8/ZIF-67 bi-MOF coated cyclomatrix poly (organophosphazene) nanospheres
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Zhou, Yutao, Wemyss, Alan M., Brown, Oliver, Huang, Qianye and Wan, Chaoying (2020) Structure and electrochemical properties of hierarchically porous carbon nanomaterials derived from hybrid ZIF-8/ZIF-67 bi-MOF coated cyclomatrix poly (organophosphazene) nanospheres. New Journal of Chemistry, 44 (11). pp. 4353-4362. doi:10.1039/D0NJ00040J ISSN 1144-0546.
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WRAP-structure-electrochemical-properties-hierarchically-porous-carbon-nanomaterials-Wan-2020.pdf - Accepted Version - Requires a PDF viewer. Download (2898Kb) | Preview |
Official URL: http://dx.doi.org/10.1039/D0NJ00040J
Abstract
Hybrid bi-ZIF nanocrystals consisting of ZIF-8/ZIF-67 were synthesised in the presence of cyclomatrix poly(organophosphazene) (POP) nanospheres and formed POP/bi-ZIF core@shell nanospheres. The POP/bi-ZIF showed excellent thermal stability up to 478°C, with well-preserved core@shell structures during carbonization at 850°C. The resultant core@shell carbon nanospheres exhibited hierarchically mesoporous structures. The porous carbon core was derived from the carbonised covalent inorganic-organic polyphosphazene framework, containing in situ doped heteroatoms such as N, P, S and O; the shell structure was derived from the bi-ZIF containing up to 40% of Zn and Co elements. The bi-ZIF derived carbon shell showed a BET surface area of 1347.76 m² g-1 and a Langmuir surface area of 1882.71 m² g-1, and the total BET surface area of the core@shell structure reached 1025.00 m² g-1. When applied as an anode material in lithium ion batteries, the core@shell carbon structure reached a charge capacity of 595 mA h g-1 with a discharge capacity of 546 mA h g-1, and remained reversible charge/discharge capacity at 400 mA h g-1 after 140 cycles, which is higher than the theoretical capacity of graphite anode. A good cycling stability with 83% capacity retention in the C-rate tests was achieved. This work provides a facile and scalable method to produce mesoporous carbon nanostructures with in situ doped metal elements and heteroatoms, which benefits the high rate electrochemical properties of lithium ion batteries.
Item Type: | Journal Article | ||||||||
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Subjects: | Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||
Library of Congress Subject Headings (LCSH): | Nanocrystals, Nanocrystals—Synthesis , Nanostructured materials , Carbonization | ||||||||
Journal or Publication Title: | New Journal of Chemistry | ||||||||
Publisher: | Royal Society of Chemistry | ||||||||
ISSN: | 1144-0546 | ||||||||
Official Date: | 21 March 2020 | ||||||||
Dates: |
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Volume: | 44 | ||||||||
Number: | 11 | ||||||||
Page Range: | pp. 4353-4362 | ||||||||
DOI: | 10.1039/D0NJ00040J | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 25 February 2020 | ||||||||
Date of first compliant Open Access: | 13 February 2021 | ||||||||
RIOXX Funder/Project Grant: |
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