Details

Autor(en) / Beteiligte

• Stolarska, M.
• Niedzicki, L.
• Borkowska, R.
• Zalewska, A.
• Wieczorek, W.

Titel

Structure, transport properties and interfacial stability of PVdF/HFP electrolytes containing modified inorganic filler

Ist Teil von

• Electrochimica acta, 2007-12, Vol.53 (4), p.1512-1517

Ort / Verlag

Oxford: Elsevier Ltd

Erscheinungsjahr

2007

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Gel polymer electrolyte membranes composed of poly(vinylidene fluoride-hexafluoropropylene) (PVdF-HFP) and surface modified aluminum or titanium oxide were prepared according to the so-called Bellcore process. Modifications were done by impregnating ceramic powder with 1–8% sulphuric acid aqueous solutions. Filler grain size varied from 10 to 12 μm. The membranes were conditioned in liquid electrode—1 mol/l LiClO 4 in PC. The ionic conductivity of polymer membrane increased by more than one order of magnitude upon the addition of filler into polymer host. For electrolyte membrane containing modified aluminum or titanium oxide, the interfacial resistance is stable in time as opposed to unmodified gel electrolytes. An increase in lithium transference number is observed upon the addition of filler. Lithium transference number also increases with the fraction of acidic surface groups.