Sodium Vanadium Oxide: A New Material for High-Performance Symmetric Sodium-Ion Batteries

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 n...

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Bibliographic Details
Published in:Chemphyschem 2014-07, Vol.15 (10), p.2121-2128
Main Authors: Hartung, Steffen, Bucher, Nicolas, Nair, Vivek Sahadevan, Ling, Cheah Yan, Wang, Yuxi, Hoster, Harry E., Srinivasan, Madhavi
Format: Article
Language:English
Subjects:
Applied sciences
cathode materials
Chemistry
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Electrochemistry
Electrodes: preparations and properties
energy storage
Exact sciences and technology
General and physical chemistry
Sodium
sodium vanadium oxide
sodium-ion batteries
symmetric batteries
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Summary: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⋅0.6 H2O, 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. The battery performance of sodium vanadium oxide (NVO) is tested in sodium‐ion‐battery half cells. X‐ray photoelectron spectroscopy measurements aid in the study of the electrochemical process. NVO exhibits high capacities when used as a cathode material, even at current rates as high as 800 mA g−1. Symmetric full‐cell batteries with varying cathode:anode mass ratios are also studied.
ISSN:1439-4235
1439-7641
DOI:10.1002/cphc.201402020