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Published on: November 11, 2013
Single crystalline Na(0.7)MnO2 nanoplates as cathode materials for sodium-ion batteries with enhanced performance
Dawei Su1, Chengyin Wang, Hyo-jun Ahn
1Centre for Clean Energy Technology, School of Chemistry and Forensic Science, University of Technology, Sydney, Sydney, NSW 2007, Australia.
Abstract:
Single crystalline rhombus-shaped Na(0.7)MnO2 nanoplates have been synthesized by a hydrothermal method. TEM and HRTEM analyses revealed that the Na(0.7)MnO2 single crystals predominantly exposed their (100) crystal plane, which is active for Na(+)-ion insertion and extraction. When applied as cathode materials for sodium-ion batteries, Na(0.7)MnO2 nanoplates exhibited a high reversible capacity of 163 mA h g(-1), a satisfactory cyclability, and a high rate performance. The enhanced electrochemical performance could be ascribed to the predominantly exposed active (100) facet, which could facilitate fast Na(+)-ion insertion/extraction during the discharge and charge process.
