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Sodium vanadium oxide: a new material for high-performance symmetric sodium-ion batteries

Research output: Contribution to journalJournal articlepeer-review

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  • Steffen Hartung
  • Nicolas Bucher
  • Vivek Sahadevan Nair
  • Cheah Yan Ling
  • Yuxi Wang
  • Harry E. Hoster
  • Madhavi Srinivasan
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<mark>Journal publication date</mark>21/07/2014
<mark>Journal</mark>ChemPhysChem
Issue number10
Volume15
Number of pages8
Pages (from-to)2121-2128
Publication StatusPublished
<mark>Original language</mark>English

Abstract

Room-temperature sodium-ion batteries have the potential to become the technology of choice for large-scale electrochemical energy storage because of the high sodium abundance and low costs. However, not many materials meet the performance requirements for practical applications. Here, we report a novel sodium-ion battery electrode material, Na2.55V6O16 center dot 0.6H(2)O, that shows significant capacities and stabilities at high current rates up to 800 mA g(-1). X-ray photoelectron spectroscopy measurements are carried out to better understand the underlying reactions. Moreover, due to the different oxidation states of vanadium, this material can also be employed in a symmetric full cell, which would decrease production costs even further. For these full cells, capacity and stability tests are conducted using various cathode: anode mass ratios.