Crystal chemistry and electrical study of NaxNbTi(PO4)3

A chemical map of NaSICON electrode materials for sodium-ion batteries

“…Voltage vs. Na (Volts) exceptions to this trend are for V and Nb-based NaSICONs, which can also operate on the V V /V IV couple (see mixed NaxVM'(PO4)3 systems in Figure 6) and the Nb V /Nb IV couple in NaxNbTi(PO4)3 not discussed here. [66]…”

The influence of iron substitution on the electrochemical properties of Li1+xTi2−xFex(PO4)3/C composites as electrodes for lithium batteries

“…[1][2][3][4] Since the first studies, titanium containing phosphates constituted a family of good ionic conductors clearly envisaged for their application as solid state electrolytes. [5][6][7] Infinite ribbons of alternating TiO 6 and LiO 6 octahedra are linked together by PO 4 tetrahedra perpendicular to the c direction creating large M 2 vacant sites. The M 1 sites in the NASI-CON structures are fully occupied by the alkaline ions.…”

On the structure of Li3Ti2(PO4)3

“…Since the discovery of the high conductivity of Nasicon-type materials by Hong 1 and Goodenough et al, 2 a lot of studies have been devoted to these compounds. [3][4][5][6][7][8][9][10][11][12] Sodium-based compounds have been thoroughly investigated from both the structural and the electrical points of view. [1][2][3][7][8][9][12][13][14][15][16] The crystal structure of Nasicon-type phases A x B 2 (PO 4 ) 3 exhibits a three-dimensional framework and allows for numerous ionic substitutions at various lattice sites.…”