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Beilstein J Nanotechnol. 2013 Oct 18;4:665-70. doi: 10.3762/bjnano.4.74. eCollection 2013.

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

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1
Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg, 89081 Ulm, Germany.

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.

KEYWORDS:

Li–O2 batteries; aprotic electrolyte; impedance spectroscopy; scanning electron microscopy

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