A mixed iron-manganese based pyrophosphate cathode, Na2Fe0.5Mn0.5P2O7, for rechargeable sodium ion batteries

Physical Chemistry Chemical Physics : PCCP
Rana A ShakoorRamazan Kahraman

Abstract

The development of secondary batteries based on abundant and cheap elements is vital. Among various alternatives to conventional lithium-ion batteries, sodium-ion batteries (SIBs) are promising due to the abundant resources and low cost of sodium. While there are many challenges associated with the SIB system, cathode is an important factor in determining the electrochemical performance of this battery system. Accordingly, ongoing research in the field of SIBs is inclined towards the development of safe, cost effective cathode materials having improved performance. In particular, pyrophosphate cathodes have recently demonstrated decent electrochemical performance and thermal stability. Herein, we report the synthesis, electrochemical properties, and thermal behavior of a novel Na2Fe0.5Mn0.5P2O7 cathode for SIBs. The material was synthesized through a solid state process. The structural analysis reveals that the mixed substitution of manganese and iron has resulted in a triclinic crystal structure (P1[combining macron] space group). Galvanostatic charge/discharge measurements indicate that Na2Fe0.5Mn0.5P2O7 is electrochemically active with a reversible capacity of ∼80 mA h g(-1) at a C/20 rate with an average redox potential of ...Continue Reading

References

Feb 8, 2008·Nature·M Armand, J-M Tarascon
Dec 15, 2010·Nature Materials·R BerthelotC Delmas
Aug 16, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·D CarlierC Delmas
May 25, 2012·Chemical Communications : Chem Comm·Yuhao LuJohn B Goodenough
Feb 6, 2015·Angewandte Chemie·Dipan KunduLinda F Nazar

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Citations

Mar 24, 2017·Advanced Science·Qiao NiChuan Wu
May 27, 2017·Advanced Science·Yongjin FangHanxi Yang

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