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AuthorKim, Heejin
AuthorShakoor, R. A.
AuthorPark, Chansun
AuthorLim, Soo Yeon
AuthorKim, Joo-Seong
AuthorJo, Yong Nam
AuthorCho, Woosuk
AuthorMiyasaka, Keiichi
AuthorKahraman, Ramazan
AuthorJung, Yousung
AuthorChoi, Jang Wook
Available date2015-11-05T13:23:46Z
Publication Date2013
Publication NameAdvanced Functional Materials
ResourceWiley Online Library
CitationKim, H., Shakoor, R. A., Park, C., Lim, S. Y., Kim, J.-S., Jo, Y. N., Cho, W., Miyasaka, K., Kahraman, R., Jung, Y. and Choi, J. W. (2013), Na2FeP2O7 as a Promising Iron-Based Pyrophosphate Cathode for Sodium Rechargeable Batteries: A Combined Experimental and Theoretical Study. Advanced Functional Materials, 23: 1147-1155.
ISSN1616-3028
URIhttp://dx.doi.org/10.1002/adfm.201201589
URIhttp://hdl.handle.net/10576/3755
AbstractConsidering the promising electrochemical performance of the recently reported pyrophosphate family in lithium ion batteries as well as the increasing importance of sodium ion batteries (SIBs) for emerging large-scale applications, here, the crystal structure, electrochemical properties, and thermal stability of Na2FeP2O7, the first example ever reported in the pyrophosphate family for SIBs, are investigated. Na2FeP2O7 maintains well-defined channel structures (triclinic framework under the P1 space group) and exhibits a reversible capacity of ≈90 mAh g−1 with good cycling performance. Both quasi-equilibrium measurements and first-principles calculations consistently indicate that Na2FeP2O7 undergoes two kinds of reactions over the entire voltage range of 2.0–4.5 V (vs Na/Na+): a single-phase reaction around 2.5 V and a series of two-phase reactions in the voltage range of 3.0–3.25 V. Na2FeP2O7 shows excellent thermal stability up to 500 °C, even in the partially desodiated state (NaFeP2O7), which suggests its safe character, a property that is very critical for large-scale battery applications.
Languageen
PublisherWILEY-VCH Verlag GmbH & Co.
Subjectsodium ion batteries
iron pyrophosphate
density functional theory
thermal stability
TitleNa2FeP2O7 as a Promising Iron-Based Pyrophosphate Cathode for Sodium Rechargeable Batteries: A Combined Experimental and Theoretical Study
TypeArticle
Issue Number9
Volume Number23


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