Sodium-ion batteries (SIBs) are considered a good choice for post-lithium devices. Transition metal sodium pyrophosphates are among the most interesting cathode materials for SIBs. Here we study the electrochemical properties of the system Na 2 Fe 1´x Mn x P 2 O 7 (x = 0, 0.25, 0.5, 0.75, 1). By means of cyclic voltammetry (CV) and galvanostatic experiments, we confirm that pure Fe and Fe-rich compounds are promising for application in sodium batteries, whereas Mn-rich samples are less satisfactory, at least in case of solid-state reaction recipes and standard slurry preparations. Proper carbon coating is likely needed to improve the electrochemical behavior of Mn-rich samples.
Tealdi, C., Ricci, M., Ferrara, C., Bruni, G., Quartarone, E., Mustarelli, P. (2016). Electrochemical study of Na 2 Fe 1-x Mn x P 2 O 7 (X = 0, 0.25, 0.5, 0.75, 1) as cathode material for rechargeable Na-Ion batteries. BATTERIES, 2(1) [10.3390/batteries2010001].
Electrochemical study of Na 2 Fe 1-x Mn x P 2 O 7 (X = 0, 0.25, 0.5, 0.75, 1) as cathode material for rechargeable Na-Ion batteries
Ferrara, C;Mustarelli, P
2016
Abstract
Sodium-ion batteries (SIBs) are considered a good choice for post-lithium devices. Transition metal sodium pyrophosphates are among the most interesting cathode materials for SIBs. Here we study the electrochemical properties of the system Na 2 Fe 1´x Mn x P 2 O 7 (x = 0, 0.25, 0.5, 0.75, 1). By means of cyclic voltammetry (CV) and galvanostatic experiments, we confirm that pure Fe and Fe-rich compounds are promising for application in sodium batteries, whereas Mn-rich samples are less satisfactory, at least in case of solid-state reaction recipes and standard slurry preparations. Proper carbon coating is likely needed to improve the electrochemical behavior of Mn-rich samples.
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