1. Molten salt disproportionation synthesis of nanosized VN wrapped onto carbon fibers with enhanced lithium-ion storage capabilities.
- Author
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Liu, Rui Jia, Yang, Ling Xu, Wang, Wen Jun, Liu, Hui Jun, and Zeng, Chao Liu
- Subjects
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FUSED salts , *RAW materials , *ELECTROCHEMICAL electrodes , *STRUCTURAL stability , *LITHIUM-ion batteries , *MELAMINE - Abstract
Nanosized vanadium nitride (VN) wrapped onto carbon fibers was synthesized by a molten salt disproportionation synthesis method at 800–1,000 ºC, using V and melamine as raw materials in molten (Li,K)Cl salts. Molten salts could accelerate the formation of nanosized VN at a lower temperature, which is possibly associated with the disproportionation reaction of V-ions on g-C 3 N 4 surface. VN displays remarkable application prospects as an anode material for lithium-ion batteries (LIBs), delivering a reversible discharge capacity of 320.1 mAh·g−1 at 1.0 A·g−1 after 500 cycles and 669.4 mAh·g−1 at 0.1 A·g−1 after 230 cycles without capacity attenuation. Such a remarkable cyclability of VN is attributed to the increased surface area and superior structural stability, induced by the dispersion of VN nanoparticles onto high-conductive carbon fibrous network. Li-ions storage mechanism of VN is pseudocapacitive, accompanied with the conversion-type electrochemcial reaction of VN with Li-ions during the de-/lithiation process. • Nanosized VN wrapped onto carbon fibers was firstly prepared by a molten salt disproportionation synthesis method. • Formation of nanosized VN may be associated with the disproportionation reaction of V-ions on g-C 3 N 4 surface. • VN exhibits impressive electrochemical performances as an anode for LIBs. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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