A systematic study on the synthesis of α-Fe₂O₃ multi-shelled hollow spheres

Abstract

Well-defined α-Fe2O3 multi-shelled hollow spheres have been fabricated by a facile spray drying method. The resulting material exhibits high reversible capacity and good cycling performance in lithium storage.

Controllable Fabrication and Optical Properties of Uniform Gadolinium Oxysulfate Hollow Spheres

“…Plenty of chemical and physicochemical strategies such as Ostwald ripening7, Kirkendall diffusion8, chemically induced self-transformation9, template-assisted synthesis10, and spray drying followed by annealing1112 have been applied for the design and controlled fabrication of various micro/nanospheres with hollow interiors. In particular, template-assisted synthesis has been demonstrated to be the most effective and versatile synthesis method.…”

Spray-Drying of Electrode Materials for Lithium- and Sodium-Ion Batteries

“…The examples shown in Figure 6, Figure 7, Figure 8, Figure 9, Figure 10 and Figure 11 correspond to morphologies that retain a (roughly) spherical appearance, but Figure 2b,c should remind the reader that crumpled morphologies are also common. As a final illustration of the microstructural variety, Figure 12 displays a more unexpected, multi-shelled morphology which has been reported and studied by several groups [101,107,139]. Yolk-shell granules [103,122,136] are a less extreme case of a similar phenomenon.…”

Rose flower-like NiCo2O4 with hierarchically porous structures for highly reversible lithium storage

“…In the subsequent charge/discharge curves, a large deviation of voltage is observed. This may be the result of polarization related to ion transfer during the cycling, which is often observed in many transition-metal oxides [34,35,37]. After continuous cycling for 100 cycles at the current density of 1000 mA g -1 (Figure 5d) Table 1 and Fig S4 (SI).…”

“…Recently, exploration of anode materials with good electrochemical performances has been carried out, including carbon-based materials, Si, Sn, and various transition metal oxides [6,[37][38][39][40]. Compared with other counterparts, transition metal oxides with nanostructural characteristics attracted wide attention due to their high surface-to-volume ratio and short path length for Li-ion diffusion [7][8][9].…”