期刊
DALTON TRANSACTIONS
卷 51, 期 42, 页码 16126-16134出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2dt02832h
关键词
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资金
- National Natural Science Foundation of China (NSFC) [52171206, 51762013]
- Key Project of Hebei Natural Science Foundation [E2020201030]
- Beijing-Tianjin-Hebei Collaborative Innovation Community Construction Project [21344301D]
- Second Batch of Young Talent of Hebei Province [70280016160250, 70280011808]
- Key Fund in Hebei Province Department of Education China [ZD2021014]
- Central Government Guide Local Funding Projects for Scientific and Technological Development [216Z4404G]
In this study, a freestanding and flexible 3D nanocomposite FeCoS2@N-HCNF is synthesized through coaxial electrospinning, high-temperature calcination, and a facile solvothermal process. As a binder-free anode composite for potassium-ion batteries, FeCoS2@N-HCNF exhibits high specific discharge capacity and superior cycling stability. The unique 3D structure and polyhedral spherical FeCoS2 are responsible for the impressive electrochemical performance.
Herein, we present a freestanding and flexible 3D nanocomposite made of polyhedral spherical FeCoS2 and nitrogen-doped hollow carbon nanofibers (FeCoS2@N-HCNFs) that is synthesized through coaxial electrospinning, high-temperature calcination, and a facile solvothermal process. As a binder-free anode composite for potassium-ion batteries (PIBs), FeCoS2@N-HCNF presents a high specific discharge capacity on the first lap (701.2 mA h g(-1) at 100 mA g(-1)) and superior cycling stability (132.6 mA h g(-1) at 3200 mA g(-1) after 600 cycles). The impressive electrochemical performance can be ascribed to the unique 3D structure, such as the enormous specific surface area of the mesoporous structure beneficial for K+ transfer, the three-dimensional hollow carbon nanofiber scaffold enhances the structural stability, and polyhedral spherical FeCoS2 improves the overall specific capacity. According to the above description, the FeCoS2@N-HCNF anode is a promising candidate for advanced potassium-ion batteries.
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