Highly ordered hierarchical mesoporous MnCo2O4 with cubic Iα3d symmetry for electrochemical energy storage

Changlong Xiao, Xinyi Zhang, Tiago Correia Mendes, Gregory Knowles, Alan Chaffee, Douglas Macfarlane

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Highly ordered cubic Iα3d mesoporous MnCo2O4 with crystalline framework was synthesized through a facile nanocasting method. The obtained mesoporous MnCo2O4 possesses hierarchical porosity with pore sizes of about 5 and 17 nm, respectively, and exhibits an enlarged surface area (133 m2/g) compared to binary mesoporous Co3O4 (98.6 m2/g) and MnO2 (75.0 m2/g). Significantly, the hierarchical mesoporous structure of MnCo2O4 is beneficial for exposing more electroactive sites, improving the charge transfer and facilitating the ion transport. As a consequence, the mesoporous MnCo2O4 shows a high charge storage performance of 199 mAh g-1 at a current density of 1 A/g, long cycle stability, and excellent rate capacity. This study demonstrates ordered ternary mesoporous materials with controllable porosity that have great potential for high-energy-density electrochemical energy storage.

Original languageEnglish
Pages (from-to)23976-23983
Number of pages8
JournalJournal of Physical Chemistry C
Issue number42
Publication statusPublished - 27 Oct 2016

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