La-doped LiTi2(PO4)3 ceramics

Lithium storage capability of lithium ion conductor Li1.5Al0.5Ge1.5(PO4)3

“…3, the total conductivity, , is evaluated to be 3.5 × 10 −6 S/cm from = d/(R t A) where d (0.2 cm) is the thickness of the sample and A (2 cm 2 ) is the surface area of the pellet. The conductivity of the sample, although comparable with most reported data [16,[22][23][24], is lower than the best data reported [25]. Fig.…”

“…To study the electrical and ionic behaviors of the specimens, Ag was coated onto one or two sides of the specimens according to whether lithium reference and counter electrode were needed. The Ag-coated specimen was assembled into a cell using stainless steel (SS) as current collector to test the AC impedance [22]. To study the cyclic voltammetric (CV) performance of the specimens, one side of the specimen was coated with a Ag layer as a working electrode while the other side was attached with a lithium foil as a counter electrode.…”

“…Galvanostatic charge/discharge cycling experiment was performed in the potential range from 0.01 V to 2.5 V at a current density of 0.1 mA/cm 2 . [16,[21][22][23][24][25][26][27], indicating that LAGP has been formed. Although 25% of Ge has been substituted by Al, the diffraction peaks are not dramatically shifted, attributing to the similarity in ionic radius between Ge 4+ (0.053 nm) and Al 3+ (0.050 nm).…”

“…Recently, the glass-ceramic Li 1+x Al x Ge 2−x (PO 4 ) 3 (LAGP) has gained special interest because it is particularly stable against Li metal and has a high ionic conductivity (as high as 4.62 × 10 −3 S/cm at 27 • C) [16,[21][22][23][24][25][26][27]. Partial substitution of Ge 4+ with Al 3+ has shown improved porous density of LiGe 2 (PO 4 ) 3 as well as enhanced Li + ion conductivity.…”

Effect of Mn Substitution on the Electrochemical Properties of LiTi2(PO4)3

“…Several approaches have been developed to improve the electrochemical properties of LTP in terms of substitution of ions such as Al, Zr, Fe, La in Ti site or by increase of Li content in the unit cell 7 or by generating oxygen vacancies in the lattice 8 . Experimental densities of LTP and Mn doped LTP pellets were measured at room temperature using standard Archimedes principle.…”