One-pot synthesis of ZnFe2O4/C hollow spheres as superior anode materials for lithium ion batteries

Abstract

ZnFe(2)O(4)/C hollow spheres have been synthesized via a facile solvothermal route using low cost raw materials. The resulting composite showed a very high specific capacity of 841 mAh g(-1) after 30 cycles and good rate capability.

General Synthesis of Porous Mixed Metal Oxide Hollow Spheres with Enhanced Supercapacitive Properties

“…[13][14][15][16] Unfortunately, poor conductivity and structural collapse are still severe weakness that limit full electrochemical reactions, resulting in fast capacity decay. Many approaches, such as controlling nanostructures [17][18][19][20] and synthesizing MMO/Ni substrates [21][22][23] and MMO/carbon hybrids [24][25][26] have been developed to further improve their electrochemical performance.…”

Porous Ni0.5Zn0.5Fe2O4 Nanospheres: Synthesis, Characterization, and Application for Lithium Storage

“…The formation of the hollow NZFO nanospheres could be explained by the Ostwald ripening process [28]. In the sealed solvothermal reaction system, CO 2 bubbles resulting from the thermal decomposition of urea can serve as soft templates to induce the hollow/porous nanostructure.…”

“…Hollow ZnFe 2 O 4 nanospheres with a diameter of 1 μm were synthesized by Guo et al [6] via hydrothermal reaction followed by annealing at 600 °C in air, and the hollow spherical structure significantly increased the specific capacity and improved capacity retention, although the process required a high reaction temperature, which resulted in agglomeration of the hollow spheres. Deng et al [28] nanospheres.…”

Electrochemical Properties of Yolk–Shell‐Structured CuO–Fe2O3 Powders with Various Cu/Fe Molar Ratios Prepared by One‐Pot Spray Pyrolysis

“…The long plateau seen near 0.8 V was mainly attributed to the conversion of CuFe 2 O 4 and Fe 2 O 3 to Li 2 O, Cu, and Fe. [5,14,[34][35][36] A broad peak in the range 1.4-2.2 V in the first oxidation scan of the Fe-rich samples, as shown in Figure 3 b, could be assigned to the oxidation of both the Cu and Fe metal nanoparticles to the respective metal oxides, CuO and Fe 2 O 3 , and to the decomposition of the SEI. [15,16] The initial discharge and charge capacities of the yolk-shell CuO-Fe 2 O 3 system, where Cu/Fe = 1:2, showed maximum values of 1436 and 1012 mA h g À1 , respectively.…”