Highly Ordered Hierarchical Mesoporous MnCo2O4 with Cubic lα3d Symmetry for Electrochemical Energy Storage

Highly ordered cubic I alpha 3d 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 m(2)/g) compared to binary mesoporous Co3O4 (98.6 m(2)/g) and MnO2 (75.0 m(2)/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 controllable porosity that have great potential for high-energy-density electrochemical ordered ternary mesoporous materials with energy storage.