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

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</

SUBMITTER: Muruganantham R 

PROVIDER: S-EPMC5665866 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature