Beilstein Journal of Nanotechnology 2013-01-01

Electrochemical and electron microscopic characterization of Super-P based cathodes for Li-O2 batteries.

Mario Marinaro, Santhana K Eswara Moorthy, Jörg Bernhard, Ludwig Jörissen, Margret Wohlfahrt-Mehrens, Ute Kaiser

Index: Beilstein J. Nanotechnol. 4 , 665-70, (2013)

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Abstract

Aprotic rechargeable Li-O2 batteries are currently receiving considerable interest because they can possibly offer significantly higher energy densities than conventional Li-ion batteries. The electrochemical behavior of Li-O2 batteries containing bis(trifluoromethane)sulfonimide lithium salt (LiTFSI)/tetraglyme electrolyte were investigated by galvanostatic cycling and electrochemical impedance spectroscopy measurements. Ex-situ X-ray diffraction and scanning electron microscopy were used to evaluate the formation/dissolution of Li2O2 particles at the cathode side during the operation of Li-O2 cells.