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

Erscheinungsjahr:

2021

Erschienen:

2021

Enthalten in:

Zur Gesamtaufnahme - volume:5

Enthalten in:

Small methods - 5(2021), 8 vom: 07. Aug., Seite e2100455

Sprache:

Englisch

Beteiligte Personen:

Mou, Jirong [VerfasserIn]
Li, Yijuan [VerfasserIn]
Liu, Ting [VerfasserIn]
Zhang, Wenjia [VerfasserIn]
Li, Mei [VerfasserIn]
Xu, Yuting [VerfasserIn]
Zhong, Lei [VerfasserIn]
Pan, Wenhao [VerfasserIn]
Yang, Chenghao [VerfasserIn]
Huang, Jianlin [VerfasserIn]
Liu, Meilin [VerfasserIn]

Links:

Volltext

Themen:

Catalyze redox kinetics
DFT calculations
Hierarchical structures
Journal Article
Metal-organic frameworks
Sodium-sulfur batteries

Anmerkungen:

Date Revised 20.12.2021

published: Print-Electronic

Citation Status PubMed-not-MEDLINE

doi:

10.1002/smtd.202100455

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM334639271