Abstract
Copper-supported MoO2-C composite as an integrated anode with excellent battery performance was synthesized by a facile knife coating technique followed by heat treatment in a vacuum. The obtained samples were characterized by X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), thermal analysis, nitrogen adsorption and desorption analysis, field emission scanning microscopy (FESEM), and transmission electron microscopy (TEM). The results show the MoO2-C composite coating is comprised of a porous carbon matrix with a pore size of 1–3 nm and ultrafine MoO2 nanoparticles with a size of 5–10 nm encapsulated inside, the coating is tightly attached on the surface of copper foil, and the interface between them is free of cracks. Stable PAN-DMF-H2O system containing ammonium molybdate suitable for knife coating technique and the MoO2-C composite with ultrafine MoO2 nanoparticles encapsulated in the carbon matrix can be prepared through controlling amount of added ammonium molybdate solution. The copper-supported MoO2-C composite coating can be directly utilized as the integrated anode for lithium-ion batteries (LIBs). It delivers a capacity of 814 mA h g−1 at a current density of 100 mA g−1 after 100 cycles without apparent capacity fading. Furthermore, with increase of current densities to 200, 500, 1000, 2000, and 5000 mA g−1, it exhibits average capacities of 809, 697, 568, 383, and 188 mA h g−1. Its outstanding electrochemical performance is attributed to combined merits of integrated anode and structure with ultrafine MoO2 nanoparticles embedded in the porous carbon matrix.
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Funding
The funds of our work mainly came from Shanghai Municipal Education Commission (High-energy Beam Intelligent Processing and Green Manufacturing). We also appreciate Graduate Students Innovation Program of Shanghai University of Engineering Science (16KY0512) for its financial support.
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Li, Q., Yang, Q., Zhao, Y. et al. Carbon-based coating containing ultrafine MoO2 nanoparticles as an integrated anode for high-performance lithium-ion batteries. J Nanopart Res 19, 332 (2017). https://doi.org/10.1007/s11051-017-4019-z
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DOI: https://doi.org/10.1007/s11051-017-4019-z