Engineering One-Dimensional Bunched Ni–MoO<sub>2</sub>@Co–CoO–NC Composite for Enhanced Lithium and Sodium Storage Performance
Ban Fei, Chao Chen, Chao Hu, Daoping Cai, Qianting Wang, Hongbing Zhan
Abstract
One-dimensional bunched nanostructures have attracted particular research interest for their applications in energy-relate fields. However, developing a reasonable strategy to realize such unique structure design still remains a great challenge. Herein, we first rationally design and synthesize a distinct one-dimensional bunched Ni–MoO2@Co–CoO–NC composite through an efficient strategy of assembling the metal–organic framework (MOF) and transition metal oxide (TMO), in which the MOF-derived Co–CoO–NC polyhedra are stringed by the Ni–MoO2 nanowires. The synthesis strategy only involves the effective integration of the ZIF-67 polyhedron with NiMoO4·xH2O nanowires via solution growth at room temperature followed by a carbonation treatment under an Ar/H2 atmosphere. Benefiting from the favorable morphological and structural merits as well as the synergistic effects from different components, the bunched Ni–MoO2@Co–CoO–NC composite exhibits a remarkable half-battery performance when evaluated as the anode material for both lithium/sodium-ion batteries. Furthermore, electrode kinetic analyses reveal the capacitive-controlled behaviors within the bunched Ni–MoO2@Co–CoO–NC composite. Besides, a Ni–MoO2@Co–CoO–NC//LiFePO4 full cell is fabricated, which can deliver a high energy density of 329 Wh kg–1. The present study could provide an insight into the construction of TMOs and carbon composites with one-dimensional bunched nanostructures.