Potentiodynamic and galvanostatic testing of NaFeb>0.95b>Vb>0.05b>POb>4b>/C composite in aqueous NaNOb>3b> solution, and the properties of aqueous Nab>1.2b>Vb>3b>Ob>8b>/NaNOb>3b>/NaFeb>0.95b>Vb>0.05b>POb>4b>/C battery
NaFeb>0.95b>Vb>0.05b>POb>4b>/C was obtained by sodiation of LiFeb>0.95b>Vb>0.05b>POb>4b>/C in aqueous solution.
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Better sodiation than lithiation kinetics was evidenced in nitrate solution.
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The charge storage mechanism shifted towards pseudocapacitance one.
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Using NaFeb>0.95b>Vb>0.05b>POb>4b>/C in a Na-ion battery, both high rate and long life were evidenced.
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