Carbon coated Na7Fe7(PO4) 6F3: A novel intercalation cathode for sodium-ion batteries

Thrinathreddy Ramireddy; Md Mokhlesur Rahman; Neeraj Sharma; Alexey M. Glushenkov; Ying Chen

doi:10.1016/j.jpowsour.2014.08.039

Carbon coated Na₇Fe₇(PO₄) ₆F₃: A novel intercalation cathode for sodium-ion batteries

Thrinathreddy Ramireddy, Md Mokhlesur Rahman^*, Neeraj Sharma, Alexey M. Glushenkov, Ying Chen

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

Electrode materials are being developed to realise sodium-ion batteries that can provide energy storage solutions. Here, we develop amorphous carbon coated Na₇Fe₇(PO₄)₆F₃, prepared by combining hydrothermal and solid state reaction methods, as an insertion electrode for sodium-ion batteries applications. Na₇Fe ₇(PO₄)₆F₃ particles are surrounded by a thin layer (∼1.5-2 nm) of amorphous carbon. The Na₇Fe ₇(PO₄)₆F₃/C composite cathode undergoes reversible sodium intercalation/de-intercalation with an average operational potential of ∼3.0 V (vs Na⁺/Na). This cathode has a capacity of 65 mA h g^-1 at 100 mA g^-1 current after 60 cycles and features twice higher capacity than that of an uncoated Na ₇Fe₇(PO₄)₆F₃ sample. Therefore, the carbon-coated Na₇Fe₇(PO₄) ₆F₃ composite presents feasible sodium intercalation/de-intercalation capacity, offering possibilities for developing a low cost, high performance sodium-ion battery positive electrode.

Original language	English
Pages (from-to)	497-503
Number of pages	7
Journal	Journal of Power Sources
Volume	271
DOIs	https://doi.org/10.1016/j.jpowsour.2014.08.039
Publication status	Published - 20 Dec 2014
Externally published	Yes

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title = "Carbon coated Na7Fe7(PO4) 6F3: A novel intercalation cathode for sodium-ion batteries",

abstract = "Electrode materials are being developed to realise sodium-ion batteries that can provide energy storage solutions. Here, we develop amorphous carbon coated Na7Fe7(PO4)6F3, prepared by combining hydrothermal and solid state reaction methods, as an insertion electrode for sodium-ion batteries applications. Na7Fe 7(PO4)6F3 particles are surrounded by a thin layer (∼1.5-2 nm) of amorphous carbon. The Na7Fe 7(PO4)6F3/C composite cathode undergoes reversible sodium intercalation/de-intercalation with an average operational potential of ∼3.0 V (vs Na+/Na). This cathode has a capacity of 65 mA h g-1 at 100 mA g-1 current after 60 cycles and features twice higher capacity than that of an uncoated Na 7Fe7(PO4)6F3 sample. Therefore, the carbon-coated Na7Fe7(PO4) 6F3 composite presents feasible sodium intercalation/de-intercalation capacity, offering possibilities for developing a low cost, high performance sodium-ion battery positive electrode.",

keywords = "Amorphous carbon, Hydrothermal synthesis, Sodium-ion battery, Solid state reaction",

author = "Thrinathreddy Ramireddy and Rahman, {Md Mokhlesur} and Neeraj Sharma and Glushenkov, {Alexey M.} and Ying Chen",

year = "2014",

month = dec,

day = "20",

doi = "10.1016/j.jpowsour.2014.08.039",

language = "English",

volume = "271",

pages = "497--503",

journal = "Journal of Power Sources",

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TY - JOUR

T1 - Carbon coated Na7Fe7(PO4) 6F3

T2 - A novel intercalation cathode for sodium-ion batteries

AU - Ramireddy, Thrinathreddy

AU - Rahman, Md Mokhlesur

AU - Sharma, Neeraj

AU - Glushenkov, Alexey M.

AU - Chen, Ying

PY - 2014/12/20

Y1 - 2014/12/20

N2 - Electrode materials are being developed to realise sodium-ion batteries that can provide energy storage solutions. Here, we develop amorphous carbon coated Na7Fe7(PO4)6F3, prepared by combining hydrothermal and solid state reaction methods, as an insertion electrode for sodium-ion batteries applications. Na7Fe 7(PO4)6F3 particles are surrounded by a thin layer (∼1.5-2 nm) of amorphous carbon. The Na7Fe 7(PO4)6F3/C composite cathode undergoes reversible sodium intercalation/de-intercalation with an average operational potential of ∼3.0 V (vs Na+/Na). This cathode has a capacity of 65 mA h g-1 at 100 mA g-1 current after 60 cycles and features twice higher capacity than that of an uncoated Na 7Fe7(PO4)6F3 sample. Therefore, the carbon-coated Na7Fe7(PO4) 6F3 composite presents feasible sodium intercalation/de-intercalation capacity, offering possibilities for developing a low cost, high performance sodium-ion battery positive electrode.

AB - Electrode materials are being developed to realise sodium-ion batteries that can provide energy storage solutions. Here, we develop amorphous carbon coated Na7Fe7(PO4)6F3, prepared by combining hydrothermal and solid state reaction methods, as an insertion electrode for sodium-ion batteries applications. Na7Fe 7(PO4)6F3 particles are surrounded by a thin layer (∼1.5-2 nm) of amorphous carbon. The Na7Fe 7(PO4)6F3/C composite cathode undergoes reversible sodium intercalation/de-intercalation with an average operational potential of ∼3.0 V (vs Na+/Na). This cathode has a capacity of 65 mA h g-1 at 100 mA g-1 current after 60 cycles and features twice higher capacity than that of an uncoated Na 7Fe7(PO4)6F3 sample. Therefore, the carbon-coated Na7Fe7(PO4) 6F3 composite presents feasible sodium intercalation/de-intercalation capacity, offering possibilities for developing a low cost, high performance sodium-ion battery positive electrode.

KW - Amorphous carbon

KW - Hydrothermal synthesis

KW - Sodium-ion battery

KW - Solid state reaction

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U2 - 10.1016/j.jpowsour.2014.08.039

DO - 10.1016/j.jpowsour.2014.08.039

M3 - Article

SN - 0378-7753

VL - 271

SP - 497

EP - 503

JO - Journal of Power Sources

JF - Journal of Power Sources

ER -

Carbon coated Na₇Fe₇(PO₄) ₆F₃: A novel intercalation cathode for sodium-ion batteries

Abstract

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