Ceramic solid electrolytes such as Li1.3Ti1.7Al0.3(PO4)3
trolyte [6–14].
(LTAPO) have a high ionic conductivity, a high lithium transference number (tLi ≈ 1), and are
non-flammable. However, the ceramic electrolyte displays drawbacks such as brittleness and high
interface resistance to electrodes [15]. On the other hand, the solid polymer electrolyte has high
flexibility and is lightweight but shows low ionic conductivity with a low lithium transference rate
(tLi = 0.3–0.6) and poor electrochemical stability at high voltages [16–19].