Metal-Organic Frameworks-Derived Nitrogen-Doped Porous Carbon Nanocubes with Embedded Co Nanoparticles as Efficient Sulfur Immobilizers for Room Temperature Sodium-Sulfur Batteries
© 2021 Wiley-VCH GmbH..
Room temperature sodium-sulfur (RT Na-S) batteries are considered a promising candidate for energy-storage due to their high energy-density and low-cost. However, the shutting effect of polysulfides and sluggish kinetics of sulfur redox reactions still severely limit their practical implementation. Herein, a new type of 3D hierarchical porous carbonaceous nanocubes is reported as efficient sulfur hosts, composed of carbon nanotubes (CNT) and Co nanoparticles (NPs) uniformly embedded into a nitrogen-doped carbon matrix (NC). Because of the high specific surface area, large degree of graphitization, and the synergetic effects between Co NPs and N-doping, the as-designed CNTs/CoNC electrodes not only significantly increase polysulfides immobilization, but also efficiently catalyze sulfur redox reactions, as confirmed by experimental results and DFT calculations. When tested in a RT Na-S battery, the S@CNTs/Co@NC-0.25 cathode demonstrates outstanding electrochemical performance, achieving high initial specific capacity of 1200.3 mAh g-1 at 0.1 C, remarkable rate capability up to 5.0 C (474.2 mAh g-1 ), and superior cyclic performance of 450.5 mAh g-1 (292 mAh g-1 ) after 400 cycles at 1.0 C (5.0 C). The integration of a 3D hierarchical porous architecture with well-dispersed Co NPs of an electro-catalyst provides valuable insights based on structure-adsorption-catalysis engineering for advanced RT Na-S batteries.
Medienart: |
E-Artikel |
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Erscheinungsjahr: |
2021 |
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Erschienen: |
2021 |
Enthalten in: |
Zur Gesamtaufnahme - volume:5 |
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Enthalten in: |
Small methods - 5(2021), 8 vom: 07. Aug., Seite e2100455 |
Sprache: |
Englisch |
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Beteiligte Personen: |
Mou, Jirong [VerfasserIn] |
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Links: |
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Themen: |
Catalyze redox kinetics |
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Anmerkungen: |
Date Revised 20.12.2021 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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doi: |
10.1002/smtd.202100455 |
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funding: |
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Förderinstitution / Projekttitel: |
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PPN (Katalog-ID): |
NLM334639271 |
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520 | |a Room temperature sodium-sulfur (RT Na-S) batteries are considered a promising candidate for energy-storage due to their high energy-density and low-cost. However, the shutting effect of polysulfides and sluggish kinetics of sulfur redox reactions still severely limit their practical implementation. Herein, a new type of 3D hierarchical porous carbonaceous nanocubes is reported as efficient sulfur hosts, composed of carbon nanotubes (CNT) and Co nanoparticles (NPs) uniformly embedded into a nitrogen-doped carbon matrix (NC). Because of the high specific surface area, large degree of graphitization, and the synergetic effects between Co NPs and N-doping, the as-designed CNTs/CoNC electrodes not only significantly increase polysulfides immobilization, but also efficiently catalyze sulfur redox reactions, as confirmed by experimental results and DFT calculations. When tested in a RT Na-S battery, the S@CNTs/Co@NC-0.25 cathode demonstrates outstanding electrochemical performance, achieving high initial specific capacity of 1200.3 mAh g-1 at 0.1 C, remarkable rate capability up to 5.0 C (474.2 mAh g-1 ), and superior cyclic performance of 450.5 mAh g-1 (292 mAh g-1 ) after 400 cycles at 1.0 C (5.0 C). The integration of a 3D hierarchical porous architecture with well-dispersed Co NPs of an electro-catalyst provides valuable insights based on structure-adsorption-catalysis engineering for advanced RT Na-S batteries | ||
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700 | 1 | |a Li, Yijuan |e verfasserin |4 aut | |
700 | 1 | |a Liu, Ting |e verfasserin |4 aut | |
700 | 1 | |a Zhang, Wenjia |e verfasserin |4 aut | |
700 | 1 | |a Li, Mei |e verfasserin |4 aut | |
700 | 1 | |a Xu, Yuting |e verfasserin |4 aut | |
700 | 1 | |a Zhong, Lei |e verfasserin |4 aut | |
700 | 1 | |a Pan, Wenhao |e verfasserin |4 aut | |
700 | 1 | |a Yang, Chenghao |e verfasserin |4 aut | |
700 | 1 | |a Huang, Jianlin |e verfasserin |4 aut | |
700 | 1 | |a Liu, Meilin |e verfasserin |4 aut | |
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