Abstract
Fe3O4 nanoparticles were deposited electrochemically on an array of Cu nanoribbons and used as the anode for lithium ion batteries. The three-dimensional (3D) nanostructure of the Fe3O4 anode was characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Galvanostatic cycling tests revealed that the 3D nanostructured Fe3O4 anode exhibited a superior performance. Reversible capacity was measured as high as 870mAhg−1 after 280 cycles (at a current density of 385mAg−1, 0.42C) and also shown an excellent rate capability that was determined at 231mAhg−1 under the rate of 8000mAg−1 (∼9C). The superior performance of the 3D nanostructured Fe3O4 electrode has been attributed to its peculiar structure, which allows one-dimensional electron transport on the array, as well as to the decrease in interparticle contact resistance.
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