Improved Li-storage performance with PEDOT-decorated MnO nanoboxes.

In this paper, MnO nanoboxes coated with poly(3,4-ethylenedioxythiophene) film (denoted as MnO@PEDOT) are investigated as an anode material in lithium-ion batteries. The MnO nanoboxes are developed through the surface chemical oxidation decomposition of MnCO cubes and the subsequent removal of their remaining cores. PEDOT is coated on the surface of MnO nanoboxes via in situ polymerization of 3,4-ethylenedioxythiophene. The charge-discharge tests demonstrate that this special configuration endows the resulting MnO@PEDOT with remarkable electrochemical performances, that is a reversible capacity of 628 mA h g after 850 cycles at a current density of 1000 mA g and a rate capacity of 367 mA h g at 3000 mA g. The results indicate that the nanoboxes provide the paths for Li-ion diffusion, the reaction sites for Li-ion intercalation/deintercalation and the space to buffer the volume change during the charge-discharge process, while the conductive polymer ensures the structural stability and improves the electronic conductive property of MnO.