TY - JOUR
AB - Two types of MnO2 polymorphs, ?-MnO2 and ?-MnO2 nanorods, have been synthesized by a hydrothermal method. Their crystallographic phases, morphologies, and crystal structures were characterized by XRD, FESEM and TEM analysis. Different exposed crystal planes have been identified by TEM. The electrochemical properties of ?-MnO 2 and ?-MnO2 nanorods as cathode materials in Na-ion batteries were evaluated by galvanostatic charge/discharge testing. Both ?-MnO2 and ?-MnO2 nanorods achieved high initial sodium ion storage capacities of 278 mA h g-1 and 298 mA h g-1, respectively. ?-MnO2 nanorods exhibited a better electrochemical performance such as good rate capability and cyclability than that of ?-MnO2 nanorods, which could be ascribed to a more compact tunnel structure of ?-MnO2 nanorods. Furthermore, the one-dimensional architecture of nanorods could also contribute to facile sodium ion diffusion in the charge and discharge process. © The Royal Society of Chemistry 2013.
AU - Su, D
AU - Ahn, HJ
AU - Wang, G
DA - 2013/04/21
DO - 10.1039/c3ta00031a
EP - 4850
JO - Journal of Materials Chemistry A
PY - 2013/04/21
SP - 4845
TI - Hydrothermal synthesis of ?-MnO2 and ?-MnO 2 nanorods as high capacity cathode materials for sodium ion batteries
VL - 1
Y1 - 2013/04/21
Y2 - 2024/03/29
ER -