Biomedical Engineering Reference
In-Depth Information
15.5
Arrhenius plots of LATP nanocomposites (a) with 3, 7, and
12 vol% Al
2
O
3
, (b) with 3 and 7 vol% Al
2
O
3
during heating and cooling.
aluminum titanium phosphate (LATP). The LATP glass-ceramic is a
heterogeneous polycrystalline solid lithium ion conductor. The bulk
structure of LATP is characterized by the presence of a primary
Li
1
+xTi
2
x
Al
x
(PO
4
)
3
phase with x=0.275, which is a fast lithium ion
conductor, along with impurity phases such as Li
2
O and LiPO
4
. The
introduction of a dielectric phase, Al
2
O
3
, to the LATP provides a
characteristic feature - a deviation from linearity in the Arrhenius plots of
the nanocomposites. Figure 15.5(a) shows Arrhenius plots of LATP-Al
2
O
3
nanocomposites. The introduction of Al
2
O
3
in LATP is detrimental to the
conductivity across the entire temperature range. Nonetheless, the degree of
conductivity reduction varies across the temperature range and it also
depends upon the Al
2
O
3
concentration. For instance, in the case of LATP-
