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Batteries 2016, 2(1), 1; doi:10.3390/batteries2010001

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
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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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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 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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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

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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