Open AccessGlass-ceramics based on Li1.5Al0.5Ge1.5(PO4)3 for advanced all-solid-state batteries
Author(s) -
С. В. Першина,
Б. Д. Антонов
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1967/1/012014
Subject(s) - fast ion conductor , materials science , analytical chemistry (journal) , crystallization , electrolyte , solid solution , ceramic , conductivity , ionic conductivity , glass ceramic , mineralogy , chemical engineering , metallurgy , chemistry , electrode , chromatography , engineering
Glass-ceramic electrolytes of the Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3-x B 2 O 3 series (0≤ x ≤0.15 wt%) were obtained by glass crystallization under the same conditions of heat treatment. The influence of B 2 O 3 addition on the phase composition and unit cell parameters of lithium-aluminium-germanium-phosphate glass-ceramics was investigated by XRD. The obtained solid electrolytes have the NASICON-type structure with space group R-3c. Glass-ceramics is single-phase at 0≤ x ≤0.15. Transport properties of glass-ceramics electrolytes were investigated by impedance spectroscopy. The conductivity of Li 1.5 Al 0.5 Ge 1.5 (PO 4)3 was found to be lower compared to the B 2 O 3 -added solid electrolytes. Namely, the composition with 0.05 wt% has the highest lithium-ion conductivity, which is 5.5·10 −4 S/cm at 25 °C. Also the thermal compatibility of Li 1.5 Al 0.5 Ge 1.5 (PO 4)3 solid electrolyte with Li 4 T 5 O 12 anode material and the influence of Li 3 BO 3 addition on their compatibility were investigated by DSC method.