| Partner: Sergey Krachkovskiy |
Ostatnie publikacje
| 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 Streszczenie: 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. Afiliacje autorów:
|  | 140p. | |||||||||||||||||||||||||||
| 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 Streszczenie: 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. Afiliacje autorów:
| | 100p. |