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Batteries 2016, 2(1), 1;

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

Department of Chemistry, University of Pavia and INSTM, Viale Taramelli 16, 27100 Pavia, Italy
Author to whom correspondence should be addressed.
Academic Editor: Joeri Van Mierlo
Received: 30 September 2015 / Revised: 7 January 2016 / Accepted: 8 January 2016 / Published: 15 January 2016
(This article belongs to the Special Issue Rechargeable Battery Technologies--From Materials to Applications)
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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. View Full-Text
Keywords: sodium batteries; cathode; pyrophosphate; structure; rate capability sodium batteries; cathode; pyrophosphate; structure; rate capability

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Tealdi, C.; Ricci, M.; Ferrara, C.; Bruni, G.; Quartarone, E.; Mustarelli, P. Electrochemical Study of Na2Fe1−xMnxP2O7 (x = 0, 0.25, 0.5, 0.75, 1) as Cathode Material for Rechargeable Na-Ion Batteries. Batteries 2016, 2, 1.

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