In situ cross-linking strategy for the synthesis of three-dimensional interconnected polymer/ceramic composite electrolyte

In this work, we propose an alternative approach to develop a polymer-ceramic composite electrolyte through the in-situ PEG-MMA and PEG-DA cross-linking reaction within interconnected microporous LATP ceramic. This synthesis approach results in a PEO-LiTFSI/LATP electrolyte with an ionic conductivity of 0.25 × 10 4 S cm 1 and 4.01 × 10 4 cm 1 at 30 and 80ºC, respectively. A continuous conductive path through the electrolyte is provided by the polymer phase and the 3D interconnected support. The electrolyte system demonstrates the synergy between the ceramic support and the cross-linked polymer electrolyte complex. The connected domains of the LATP support maximize the interaction with anions, promoting the Li transference number enhancement. Impedance and dielectric analyses indicate that the Correlated Barrier Hopping (CBH) model is the most likely conduction mechanism for the composite electrolyte, following the non-Debye type dielectric relaxation. Additionally, the PEO-LiTFSI/LATP composite exhibits excellent anodic stability and it has great potential for use in Li-Ion battery technologies.

in situ polymer cross-linking; peo-latp composite electrolyte; ion transport mechanism

In situ cross-linking strategy for the synthesis of three-dimensional interconnected polymer/ceramic composite electrolyte Articles