Structural and Thermophysical Studies of Composite Na-Cobaltite Electrospun Nanofibers

Table 1

Measured parameters using XRD data, crystallite size corresponding to maximum peak (), lattice constants (, , ), volume of unit cell (), theoretical density (), experimental density (), porosity (), and activation energy () determined from temperature dependent dc resistivity.

Sample	NaCoO2
Crystallite size () ± 1 (nm); As-prepared	42
Crystallite size () ± 1 (nm); Calcined	34
Crystallite size () ± 1 (nm); Sintered	46
Lattice constants (); As-prepared
Lattice constants (); Calcined
Lattice constants (); Sintered
Volume of unit cell (); As-prepared	428.90
Volume of unit cell (); Calcined	426.54
Volume of unit cell (); Sintered	430.72
Theoretical density (); g/cm^3	4.40
Experimental density (); g/cm^3	2.29
Porosity (%)	48
Activation energy () eV	0.281