Electrochemical Study of Na2Fe1−xMnxP2O7 (x = 0, 0.25, 0.5, 0.75, 1) as Cathode Material for Rechargeable Na-Ion Batteries

Electrochemical Study of Na2Fe1−xMnxP2O7 (x = 0, 0.25, 0.5, 0.75, 1) as Cathode Material for Rechargeable Na-Ion Batteries

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 Na2Fe1−xMnxP2O7 (x = 0, 0.25, 0.5, 0.75, 1). By means of cyc...

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Veröffentlicht in:Batteries (Basel) 2016-03, Vol.2 (1), p.1
Hauptverfasser: Tealdi, Cristina, Ricci, Monica, Ferrara, Chiara, Bruni, Giovanna, Quartarone, Eliana, Mustarelli, Piercarlo
Format: Artikel
Sprache:eng
Schlagworte:
Batteries
Carbon
Cathodes
Electrochemical analysis
Electrode materials
Electrodes
Electrolytes
Iron
Lithium
Manganese
Materials selection
Rechargeable batteries
Slurries
Sodium
Sodium-ion batteries
Transition metals
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Zusammenfassung: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 Na2Fe1−xMnxP2O7 (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.
ISSN:2313-0105
2313-0105
DOI:10.3390/batteries2010001