Lithium ionic conduction and relaxation dynamics of spark plasma sintered Li5La3Ta2O12 garnet nanoceramics

Table 1 The conductivity and the activation energy of SPS LLT nanoceramics

	σ _dc (S/cm)	Δ E (e.V)	Δ E (e.V)	E _σ (e.V)	E _H (e.V)	E _D (e.V)	E _m (e.V)
	σ _dc (S/cm)	<350 K	>350 K	E _σ (e.V)	E _H (e.V)	E _D (e.V)	E _m (e.V)
SPS-850	2.98 × 10⁻⁷	0.67	0.58	0.67	0.65	0.65	0.67
SPS-875	1.25 × 10⁻⁶	0.64	0.52	0.61	0.59	0.59	0.64
SPS-900	1.3 × 10⁻⁷	0.69	0.61	0.72	0.72	0.72	0.69

The dc conductivity σ_dc at 27°C and the associated activation energy ΔE at the low- and high-temperature regions of the SPS LLT garnet nanoceramics. The activation energy values determined from the conduction E _σ, the hopping frequency E _H, the diffusion coefficient E _D, and the electric modulus relaxation time E _m are also summarized.