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PolyanionNaNi1 − xCuxPO4 glass and glass-ceramic cathode network: Structure with improved electrochemical performance
Author(s)
Grandhe, Radhika
Katta, Vamsi Krishna
Padala, Missak Swarup Raju
Dutta, Dimple P.
WisanuPecharapa
Ravuri, Balaji Rao
Date Issued
July 1, 2024
Type
Article
Abstract
PolyanionNaNi1 − xCuxPO4 glass and glass-ceramic networks are prepared by Melt-quenching and after heat treated for 5 h at its Tc, regarded as probable cathode composite material for Na-ion batteries (SIBs). The intensity variations arrived from XRD traces, revealed that the phases NaNi4(PO4)3 (ICSD 60-964), NaCu(PO4) (ICSD 581-303), and Na2CuNi(PO4)2 (ICSD 20-22594) which are precipitated during heat treatment is primarily caused by the partial substitution of tetrahedral PO4 and CuO6 sites with NiO6 structural active sites in the glass-ceramic network resulting to accommodate sudden volume changes, and therefore diffusion of Na+ ions will be improved along with fast rate capability and voltage for longer durations as reflected in SEM image analysis. The cyclic voltammogram of half-cell of best conducting NaNi0.3Cu0.7PO4 glass-ceramic cathode with a voltage range of 0.2 to 4 V and 100 V/S cycles noted to achieve lowest cell polarization (0.41 V) with best capacity retention of discharge (96%) up to 1000 cycles. Graphical abstract: (Figure presented.)
Citation
Applied Physics A Materials Science and Processing, 130(7), 2024