Partner: Andrea La Monaca


Recent publications
1.La Monaca A., Girard G., Savoie S., Veillette R., Krachkovskiy S., Pierini F., Vijh A., Rosei F., Paolella A., Influence of TiIV substitution on the properties of a Li1.5Al0.5Ge1.5(PO4)3 nanofiber-based solid electrolyte, NANOSCALE, ISSN: 2040-3364, DOI: 10.1039/D2NR00017B, Vol.14, No.13, pp.5094-5101, 2022
Abstract:

We report the influence of the partial substitution of Ge with Ti on the properties of NASICON Li1.5Al0.5Ge1.5(PO4)3 (LAGP) nanofibers prepared by electrospinning. Replacing a small amount of Ge (up to 20%) with Ti is advantageous for enhancing both the purity and morphology of LAGP fibers, as observed by X-ray diffraction, electron microscopy and nuclear magnetic resonance spectroscopy. When Ti-substituted LAGP (LAGTP) fibers are used as filler to develop composite polymer electrolytes, the ionic conductivity at 20 °C improves by a factor of 1.5 compared to the plain polymer electrolyte. Additionally, above 40 °C the LAGTP fiber-based composite electrolytes were more conductive than the equivalent LAGP fiber-based one. We believe that these findings can make a substantial contribution to optimizing current methods and developing novel synthesis approaches for NASICON based electrolytes.

Affiliations:
La Monaca A.-other affiliation
Girard G.-Lorraine University (FR)
Savoie S.-other affiliation
Veillette R.-Institut de Recherche d'Hydro-Québec (CA)
Krachkovskiy S.-other affiliation
Pierini F.-IPPT PAN
Vijh A.-other affiliation
Rosei F.-other affiliation
Paolella A.-other affiliation
2.La Monaca A., Girard G., Savoie S., Bertoni G., Krachkovskiy S., Vijh A., Pierini F., Rosei F., Paolella A., Synthesis of electrospun NASICON Li1.5Al0.5Ge1.5(PO4)3 solid electrolyte nanofibers by control of germanium hydrolysis, Journal of The Electrochemical Society, ISSN: 0013-4651, DOI: 10.1149/1945-7111/ac334a, Vol.168, No.11, pp.110512-1-9, 2021
Abstract:

We report the synthesis of ceramic Li1.5Al0.5Ge1.5(PO4)3 (LAGP) nanofibers by combining sol–gel and electrospinning techniques. A homogeneous and stable precursor solution based on chlorides was achieved by controlling Ge hydrolysis. Subsequent electrospinning and heat treatment resulted in highly porous nanostructured NASICON pellets. After a full chemical-physical characterization, various amounts of LAGP nanofibers were used as a filler to develop polyethylene oxide (PEO)-based composite electrolytes. The addition of 10% LAGP nanofibers has allowed doubling the ionic conductivity of the plain polymer electrolyte, by providing longer ion-conductive paths and reducing PEO crystallinity. These findings are promising towards developing solution-based synthesis approaches featuring Ge precursors. In addition, the achieved LAGP nanofibers proved to be a promising nanofiller candidate to develop composite electrolytes for next-generation solid-state batteries.

Affiliations:
La Monaca A.-other affiliation
Girard G.-Lorraine University (FR)
Savoie S.-other affiliation
Bertoni G.-other affiliation
Krachkovskiy S.-other affiliation
Vijh A.-other affiliation
Pierini F.-IPPT PAN
Rosei F.-other affiliation
Paolella A.-other affiliation