title: Enhanced lithium battery with polyethylene oxide-based electrolyte containing silane-Al2 O3 ceramic filler.
abstract: A solid polymer electrolyte prepared by using a solvent-free, scalable technique is reported. The membrane is formed by low-energy ball milling followed by hot-pressing of dry powdered polyethylene oxide polymer, LiCF3 SO3 salt, and silane-treated Al2 O3 (Al2 O3 -ST) ceramic filler. The effects of the ceramic fillers on the properties of the ionically conducting solid electrolyte membrane are characterized by using electrochemical impedance spectroscopy, XRD, differential scanning calorimeter, SEM, and galvanostatic cycling in lithium cells with a LiFePO4 cathode. We demonstrate that the membrane containing Al2 O3 -ST ceramic filler performs well in terms of ionic conductivity, thermal properties, and lithium transference number. Furthermore, we show that the lithium cells, which use the new electrolyte together with the LiFePO4 electrode, operate within 65 and 90 °C with high efficiency and long cycle life. Hence, the Al2 O3 -ST ceramic can be efficiently used as a ceramic filler to enhance the performance of solid polymer electrolytes in lithium batteries.
authors.affiliation: Department of Chemistry, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia.
authors.forename: Berhanu W
authors.initials: BW
authors.lastname: Zewde
authors.forename: Shimelis
authors.initials: S
authors.lastname: Admassie
authors.forename: Jutta
authors.initials: J
authors.lastname: Zimmermann
authors.forename: Christian Schulze
authors.initials: CS
authors.lastname: Isfort
authors.forename: Bruno
authors.initials: B
authors.lastname: Scrosati
authors.forename: Jusef
authors.initials: J
authors.lastname: Hassoun
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D002516:Ceramics / Q000737:chemistry*; D011211:Electric Power Supplies; D008094:Lithium / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry*; D012821:Silanes / Q000737:chemistry*; D013696:Temperature
chemical_list: D012821:Silanes; D011092:Polyethylene Glycols; D008094:Lithium; D000537:Aluminum Oxide
keywords: aluminum; electrochemistry; lithium; silanes; solid polymer