Formation of hollow <scp> MoO <sub>2</sub> </scp> @C nano‐octahedrons using polyoxometalate‐based metal‐organic framework as a template for enhanced lithium‐ion batteries
Yu Wang, Hongsheng Zhao, Andi Di, Xu Yang, Bowen Cong, Gang Chen
Abstract
Unique hollow MoO2@C nanoparticles are synthesized in situ by the polyoxometalate-based metal-organic framework as a precursor. Characteristic results show that the prepared MoO2@C nanoparticles have a narrow size distribution, and the C, mainly constituted by graphitic carbon, connects with the MoO2. Such a special structure guarantees a high electrical conductivity and high chemical stability of the synthesized MoO2@C composite material. MoO2@C composite material can provide a high reversible capacity of 1134 mAh g−1 at a current density of 500 mA g−1 after 200 cycles, and has a capacity retention of 88.24%. What's more, while the current density is doubled, the capacity stabilizes at 720 mAh g−1, of which 81% is retained after 800 cycles. This work highlights that nanostructure design makes contributions to achieving advanced energy storage materials and provides a new concept of preparing organic-inorganic hybrid materials for energy storage.