Dual Design on Hierarchically Hollow MoTe/C with Ion/Electron Channel Engineering for High-Performance Sodium Storage.

Transition-metal tellurides have been investigated as novel anode materials for application in sodium-ion batteries (SIBs) due to their rich active sites and unique and controllable layered nanostructures. However, the weak structural strength and inferior intercalation/deintercalation kinetics inhibit the development of transition-metal tellurides. In this work, MoTe/C composites with two different hollow nanostructures are designed and prepared.

Reshaping carbon-coated MnMoO nanotubes and enhanced sodium storage performance.

MnMoO/C nanotubes are successfully reshaped from micron-sized MnMoO blocks using a simple microwave-combined calcination method with dopamine as both scissors and carbon source. The synthesized MnMoO/C nanotube (MMOC-2) exhibits enhanced sodium storage performance as anodes for half-cell (217 mA h g with 99% coulombic efficiency after 500 cycles) and full-cell (capacity retention of 75% after 100 cycles), which is attributed to the uniquely reshaped nanostructures with abundant active sites, short ion diffusion path and fast charge transfer.