Details

Autor(en) / Beteiligte

• Borkowska, R
• Reda, A
• Zalewska, A
• Wieczorek, W

Titel

Composite polyether electrolytes with Lewis acid type additives

Ist Teil von

• Electrochimica acta, 2001-03, Vol.46 (10), p.1737-1746

Ort / Verlag

Oxford: Elsevier Ltd

Erscheinungsjahr

2001

Quelle

Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)

Beschreibungen/Notizen

• Polymer electrolytes based on low molecular weight poly(ethylene glycol)s doped with LiClO 4 (0.1–1 mol kg PEG) and containing up to 10 mass% of AlBr 3 additive were synthesized and characterized by impedance spectroscopy, FT-IR, DSC and rheological techniques. It has been found that addition of small amount (up to 5 mass%) of AlBr 3 increases electrolytes conductivity in comparison with pure PEG–LiClO 4 electrolytes for samples containing 1 mol of LiClO 4 per kg PEG. Room temperature conductivity as high as 3×10 −4 S/cm was measured. For higher AlBr 3 concentrations stiffening of the polymer organic electrolyte was observed which results in a decrease in the ionic conductivity. The systematic studies of the interfacial phenomena performed in the symmetrical cell comprising two lithium electrodes separated by PEG–LiClO 4–AlBr 3 electrolyte allow us to postulate different rate of SEI (solid electrolyte interface) formation and limitation of its growth in the presence of AlBr 3 interface thus enhancing the effectiveness of lithium cells.