Electrochemical and electron microscopic characterization of Super-P based cathodes for Li–O(2) batteries

Aprotic rechargeable Li–O(2) 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–O(2) 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 Li(2)O(2) particles at the cathode side during the operation of Li–O(2) cells.