Journal
NPG ASIA MATERIALS
Volume 5, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/am.2013.56
Keywords
beta-MnO2; nanorods; cathode material; tunnel structure; sodium-ion batteries
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Funding
- Australian Research Council (ARC) through the ARC FT project [FT110100800]
- National Research Foundation of Korea [2013R1A2A1A01015911]
- National Research Foundation of Korea [2013R1A2A1A01015911] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Sodium-ion batteries are being considered as a promising system for stationary energy storage and conversion, owing to the natural abundance of sodium. It is important to develop new cathode and anode materials with high capacities for sodium-ion batteries. Herein, we report the synthesis of beta-MnO2 nanorods with exposed tunnel structures by a hydrothermal method. The as-prepared beta-MnO2 nanorods have exposed {111} crystal planes with a high density of (1 x 1) tunnels, which leads to facile sodium ion (Na-ion) insertion and extraction. When applied as cathode materials in sodium-ion batteries, beta-MnO2 nanorods exhibited good electrochemical performance with a high initial Na-ion storage capacity of 350 mAh g(-1). beta-MnO2 nanorods also demonstrated a satisfactory high-rate capability as cathode materials for sodium-ion batteries.
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