Issue 46, 2015

Controlled synthesis and enhanced electrochemical performance of Prussian blue analogue-derived hollow FeCo2O4 nanospheres as lithium-ion battery anodes

Abstract

Porous metal oxides have attracted great interest as anode materials for lithium ion batteries owing to their improved electrochemical properties. In this study, we propose a Prussian blue analogue (PBA)-derived strategy to successfully prepare hollow porous FexCo3−xO4 (FCO) with controlled morphologies (nanospheres and nanocubes) using surfactants as “soft templates”. In comparison with FCO nanocubes (FCO-NCs) and FCO nanoparticles (FCO-NPs), FCO spheres (FCO-NSs) show a much better cycling stability and rate capability as an anode material for lithium ion batteries. The cycling capacity of FCO-NSs at the 50th cycle has been largely enhanced to 1060 mA h g−1 from only 721 (FCO-NCs) and 389 mA h g−1 (FCO-NPs). The capacity of FCO-NSs at a current density of 1000 mA g−1 has been considerably improved to 823 mA h g−1 from 504 and 152 mA h g−1 for FCO-NCs and FCO-NPs, respectively, indicating a much better rate capability. The greatly enhanced cycling stability and rate capability can be largely attributed to the hollow porous structure of FCO-NSs with a wider pore distribution, a slightly higher Co content (compared to FCO-NCs) and higher mechanical strength, which facilitates Li+ and electron diffusion and migration.

Graphical abstract: Controlled synthesis and enhanced electrochemical performance of Prussian blue analogue-derived hollow FeCo2O4 nanospheres as lithium-ion battery anodes

Supplementary files

Article information

Article type
Paper
Submitted
12 Feb 2015
Accepted
31 Mar 2015
First published
31 Mar 2015

RSC Adv., 2015,5, 36575-36581

Controlled synthesis and enhanced electrochemical performance of Prussian blue analogue-derived hollow FeCo2O4 nanospheres as lithium-ion battery anodes

L. Liu, Z. Hu, L. Sun, G. Gao and X. Liu, RSC Adv., 2015, 5, 36575 DOI: 10.1039/C5RA02781K

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