Constructing MoO(2) Porous Architectures Using Graphene Oxide Flexible Supports for Lithium Ion Battery Anodes

Graphene oxide flexibly supported MoO(2) porous architectures (MoO(2)/GO) by decomposition of the prepared ammonium molybdate/GO preforms is fabricated. Focused ion beam microscope analysis shows that the inside structures of the architectures strongly depend on the percentages of the GO used as flexible supports: micrometer scale MoO(2) particulates growing on the GO (micrometer MoO(2)/GO), 3D honeycomb‐like nanoarchitectures (MoO(2)/GO nanohoneycomb), and layered MoO(2)/GO architectures are achieved at the percentage of GO at 4.3, 15.2, and 20.8 wt%, respectively. The lithium storage performance of the MoO(2)/GO architectures strongly depends on their inside structures. At the current density of 100 mA g(−1), the capacities of the micrometer MoO(2)/GO, MoO(2)/GO nanohoneycomb, and layered MoO(2)/GO remain at 901, 1127, and 967 mAh g(−1) after 100 cycles. The average coulombic efficiencies of micrometer MoO(2)/GO, MoO(2)/GO nanohoneycomb, and layered MoO(2)/GO electrodes are 97.6%, 99.3%, and 99.0%. Moreover, the rate performance shows even cycled at a high current density of 5000 mA g(−1), the MoO(2)/GO nanohoneycomb can deliver the capacity as high as 461 mAh g(−1). The MoO(2)/GO nanohoneycomb exhibits best performance attributed to its unique nanohoneycomb structure constructed with ultrafine MoO(2) fixed on the GO flexible supports.