An Efficient Evaluation of F-doped Polyanion Cathode Materials with Long Cycle Life for Na-Ion Batteries Applications

Rasu Muruganantham; Yi Tang Chiu; Chun Chuen Yang; Chin Wei Wang; Wei Ren Liu

doi:10.1038/s41598-017-13718-0

An Efficient Evaluation of F-doped Polyanion Cathode Materials with Long Cycle Life for Na-Ion Batteries Applications

Rasu Muruganantham, Yi Tang Chiu, Chun Chuen Yang, Chin Wei Wang, Wei Ren Liu

Department of Physics

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

38 Scopus citations

Abstract

A series of Na_3-x V₂(PO_4-x F _x )₃ (x = 0, 0.1, 0.15 and 0.3) polyanion cathode materials are synthesized via a sol-gel method. The optimal doping concentration of F in Na₃V₂(PO₄)₃ is 0.15 mol %. By neutron powder diffraction data, the chemical composition of as-synthesized material is Na_2.85V₂(PO_3.95F_0.05)₃. The half-cell of Na_2.85V₂(PO_3.95F_0.05)₃ cathode exhibits a stable discharge capacity of 103 mAh g^-1 and 93% of capacity retention over 250 cycles without decay at 0.1 A g^-1, which is higher than that of bare Na₃V₂(PO₄)₃ (98 mAh g^-1). The high rate capability of Na_2.85V₂(PO_3.95F_0.05)₃ is also dramatically enhanced via increase the conductivity of host material by F-doping. Moreover, the symmetrical Na-ion full-cell is fabricated using Na_2.85V₂(PO_3.95F_0.05)₃ as cathode and anode materials. It is achieved that the good reversibility and superior cycling stability about 98% of capacity retention with ∼100% of coulombic efficiency at 1.0 A g^-1 throughout 1000 cycles. These results demonstrate that the optimal amount of Na_2.85V₂(PO_3.95F_0.05)₃ is a distinctive potential candidate for excellent long-term cyclic stability with high rate low-cost energy storage applications.

Original language	English
Article number	14808
Journal	Scientific Reports
Volume	7
Issue number	1
DOIs	https://doi.org/10.1038/s41598-017-13718-0
State	Published - 1 Dec 2017

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title = "An Efficient Evaluation of F-doped Polyanion Cathode Materials with Long Cycle Life for Na-Ion Batteries Applications",

abstract = "A series of Na3-x V2(PO4-x F x )3 (x = 0, 0.1, 0.15 and 0.3) polyanion cathode materials are synthesized via a sol-gel method. The optimal doping concentration of F in Na3V2(PO4)3 is 0.15 mol %. By neutron powder diffraction data, the chemical composition of as-synthesized material is Na2.85V2(PO3.95F0.05)3. The half-cell of Na2.85V2(PO3.95F0.05)3 cathode exhibits a stable discharge capacity of 103 mAh g-1 and 93% of capacity retention over 250 cycles without decay at 0.1 A g-1, which is higher than that of bare Na3V2(PO4)3 (98 mAh g-1). The high rate capability of Na2.85V2(PO3.95F0.05)3 is also dramatically enhanced via increase the conductivity of host material by F-doping. Moreover, the symmetrical Na-ion full-cell is fabricated using Na2.85V2(PO3.95F0.05)3 as cathode and anode materials. It is achieved that the good reversibility and superior cycling stability about 98% of capacity retention with ∼100% of coulombic efficiency at 1.0 A g-1 throughout 1000 cycles. These results demonstrate that the optimal amount of Na2.85V2(PO3.95F0.05)3 is a distinctive potential candidate for excellent long-term cyclic stability with high rate low-cost energy storage applications.",

author = "Rasu Muruganantham and Chiu, {Yi Tang} and Yang, {Chun Chuen} and Wang, {Chin Wei} and Liu, {Wei Ren}",

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T1 - An Efficient Evaluation of F-doped Polyanion Cathode Materials with Long Cycle Life for Na-Ion Batteries Applications

AU - Muruganantham, Rasu

AU - Chiu, Yi Tang

AU - Yang, Chun Chuen

AU - Wang, Chin Wei

AU - Liu, Wei Ren

PY - 2017/12/1

Y1 - 2017/12/1

N2 - A series of Na3-x V2(PO4-x F x )3 (x = 0, 0.1, 0.15 and 0.3) polyanion cathode materials are synthesized via a sol-gel method. The optimal doping concentration of F in Na3V2(PO4)3 is 0.15 mol %. By neutron powder diffraction data, the chemical composition of as-synthesized material is Na2.85V2(PO3.95F0.05)3. The half-cell of Na2.85V2(PO3.95F0.05)3 cathode exhibits a stable discharge capacity of 103 mAh g-1 and 93% of capacity retention over 250 cycles without decay at 0.1 A g-1, which is higher than that of bare Na3V2(PO4)3 (98 mAh g-1). The high rate capability of Na2.85V2(PO3.95F0.05)3 is also dramatically enhanced via increase the conductivity of host material by F-doping. Moreover, the symmetrical Na-ion full-cell is fabricated using Na2.85V2(PO3.95F0.05)3 as cathode and anode materials. It is achieved that the good reversibility and superior cycling stability about 98% of capacity retention with ∼100% of coulombic efficiency at 1.0 A g-1 throughout 1000 cycles. These results demonstrate that the optimal amount of Na2.85V2(PO3.95F0.05)3 is a distinctive potential candidate for excellent long-term cyclic stability with high rate low-cost energy storage applications.

AB - A series of Na3-x V2(PO4-x F x )3 (x = 0, 0.1, 0.15 and 0.3) polyanion cathode materials are synthesized via a sol-gel method. The optimal doping concentration of F in Na3V2(PO4)3 is 0.15 mol %. By neutron powder diffraction data, the chemical composition of as-synthesized material is Na2.85V2(PO3.95F0.05)3. The half-cell of Na2.85V2(PO3.95F0.05)3 cathode exhibits a stable discharge capacity of 103 mAh g-1 and 93% of capacity retention over 250 cycles without decay at 0.1 A g-1, which is higher than that of bare Na3V2(PO4)3 (98 mAh g-1). The high rate capability of Na2.85V2(PO3.95F0.05)3 is also dramatically enhanced via increase the conductivity of host material by F-doping. Moreover, the symmetrical Na-ion full-cell is fabricated using Na2.85V2(PO3.95F0.05)3 as cathode and anode materials. It is achieved that the good reversibility and superior cycling stability about 98% of capacity retention with ∼100% of coulombic efficiency at 1.0 A g-1 throughout 1000 cycles. These results demonstrate that the optimal amount of Na2.85V2(PO3.95F0.05)3 is a distinctive potential candidate for excellent long-term cyclic stability with high rate low-cost energy storage applications.

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ER -

An Efficient Evaluation of F-doped Polyanion Cathode Materials with Long Cycle Life for Na-Ion Batteries Applications

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