Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 41, Pages 37850-37858Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b14366
Keywords
S-doped carbon; metal-organic frameworks; sodium-ion batteries; pseudocapacitance; density functional theory (DFT) calculations
Funding
- Natural Science Foundation of Shandong Province [ZR2018MEM012, ZR2018QB003]
- Project of Shandong Province Higher Education Science and Technology Program [J17KA007]
- Qilu University of Technology International Cooperation Fund [QLUTGJHZ2018025]
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Herein, a metal-organic framework (MOF)/polythiophene (PTh)-derived S-doped carbon is successfully designed and prepared employing zeolitic imidazolate frameworks (ZIF-8/ZIF-67) and thiophene (Th) as precursors. The S-doped carbon presents a neuronlike three-dimensional network structure (3DSC). The 3DSC delivers extra-high capacities (225 mAh/g at 5000 mA/g after 3000 cycles) and excellent endurance ability of current changes when applied in Na-ion batteries (SIBs). Moreover, when the 3DSC-700 anode is coupled with a sodium vanadium phosphate cathode to construct a Na-ion full cell, after 50 cycles, a high capacity of similar to 229.64 mAh/g is obtained at 100 mA/g. Electrochemical impedance spectroscopy analysis, density functional theory calculations, and pseudocapacitance contributions are adopted to investigate the excellent sodium storage mechanism of the 3DSC electrode. A new idea has been provided in this work to open up the possibility of MOF materials and carbon-based materials applications in SIBs in the future.
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