HP-MnCo2O4/C nanomaterials synthesized by Co Mn metal organic framework supported with the pyridine-3,5-dicarboxylate ligand for anode in lithium-ion batteries

Binary metal oxide with high theoretical specific capacities is attracting more attentions as anode materials for high performance lithium-ion batteries. Nevertheless, the large volume changes during cycles greatly hamper the actual application of anode materials in lithium-ion batteries. Herein, a new Co Mn metal organic framework (CoMn-MOF) with ligands of 3, 5-Pyridinedicarboxylic acid (H(2)pdc) and 1,10-Phenanthroline (Phen) was synthesized using a simplistic one-step hydrothermal approach based on previously reported of Co-MOF. At the same way, add activated carbon to generate CoMn-MOF/C followed by calcination in an inert atmosphere and then Mn Co metal oxide (Marked as HP-MnCo2O4/C) nanomaterials were obtained. The superior electrochemical performance is attributed to the nanoparticles on the surface of HP-MnCo2O4/C; many nanoparticles are connected to each other to form a stable conductive carbon network which facilitates sufficient contact between the electrolyte and the electroactive sites and provide more buffer space for volume change during charge and discharge process. Therefore, the HP-MnCo2O4/C anode shows good lithium storage and stable long-life cyclic performance, provided with a high capacity of 355 mA h g(-1) at 1000 mA g(-1) after 500 cycles.

Automated summary

In this study, a novel Co Mn metal organic framework (CoMn-MOF) was synthesized, providing a new choice of anode materials for lithium-ion batteries. The formation of nanoparticles on the surface and the stable conductive carbon network contribute to better contact between the electrolyte and the electroactive sites, and provide buffer space for volume change.