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Heejin Kim, R. A. Shakoor, Chansun Park, Soo Yeon Lim, Joo-Seong Kim, Yong Nam Jo, Woosuk Cho, Keiichi Miyasaka, Ramazan Kahraman, Yousung Jung and Jang Wook Choi Na2FeP2O7 as a Promising Iron-Based Pyrophosphate Cathode for Sodium Rechargeable Batteries: A Combined Experimental and Theoretical Study Advanced Functional Materials 23

Version of Record online: 8 OCT 2012 | DOI: 10.1002/adfm.201201589

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Na2FeP2O7 is reported as the first member in the pyrophosphate family for sodium battery cathodes. Utilizing the well-defined channel structure, Na2FeP2O7 exhibits a reversible capacity of ≈90 mAh g−1 with several different plateaus corresponding to distinctive Na sites. The thermodynamic and kinetic behaviors of this compound during battery operations are explained well using first principles calculations.

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