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Hydrothermal synthesis of ¿-MnO2 and ß-MnO 2 nanorods as high capacity cathode materials for sodium ion batteries

Journal Article


Abstract


  • Two types of MnO2 polymorphs, α-MnO2 and β-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 α-MnO 2 and β-MnO2 nanorods as cathode materials in Na-ion batteries were evaluated by galvanostatic charge/discharge testing. Both α-MnO2 and β-MnO2 nanorods achieved high initial sodium ion storage capacities of 278 mA h g-1 and 298 mA h g-1, respectively. β-MnO2 nanorods exhibited a better electrochemical performance such as good rate capability and cyclability than that of α-MnO2 nanorods, which could be ascribed to a more compact tunnel structure of β-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.

UOW Authors


  •   Wang, Guoxiu (external author)

Publication Date


  • 2013

Citation


  • Su, D., Ahn, H. J., & Wang, G. (2013). Hydrothermal synthesis of ¿-MnO2 and ß-MnO 2 nanorods as high capacity cathode materials for sodium ion batteries. Journal of Materials Chemistry A, 1(15), 4845-4850. doi:10.1039/c3ta00031a

Scopus Eid


  • 2-s2.0-84876514737

Start Page


  • 4845

End Page


  • 4850

Volume


  • 1

Issue


  • 15

Abstract


  • Two types of MnO2 polymorphs, α-MnO2 and β-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 α-MnO 2 and β-MnO2 nanorods as cathode materials in Na-ion batteries were evaluated by galvanostatic charge/discharge testing. Both α-MnO2 and β-MnO2 nanorods achieved high initial sodium ion storage capacities of 278 mA h g-1 and 298 mA h g-1, respectively. β-MnO2 nanorods exhibited a better electrochemical performance such as good rate capability and cyclability than that of α-MnO2 nanorods, which could be ascribed to a more compact tunnel structure of β-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.

UOW Authors


  •   Wang, Guoxiu (external author)

Publication Date


  • 2013

Citation


  • Su, D., Ahn, H. J., & Wang, G. (2013). Hydrothermal synthesis of ¿-MnO2 and ß-MnO 2 nanorods as high capacity cathode materials for sodium ion batteries. Journal of Materials Chemistry A, 1(15), 4845-4850. doi:10.1039/c3ta00031a

Scopus Eid


  • 2-s2.0-84876514737

Start Page


  • 4845

End Page


  • 4850

Volume


  • 1

Issue


  • 15