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Michał Krajewski, Bartosz Hamankiewicz, Monika Michalska, Mariusz Andrzejczuk, Ludwika Lipińska, Andrzej Czerwiński

Abstract
Composites of Li4Ti5O12 with Ag–Cu particles were successfully synthesized by solid-state reaction followed by thermal decomposition of the metal substrates. The presence of metallic particles was confirmed by X-ray diffraction, scanning transmission electron microscopy and X-ray photoelectron spectroscopy. Galvanostatic charge–discharge tests showed improved specific capacity and capacity retention of Li4Ti5O12/Ag–Cu composites at a 10C current rate, while cyclic voltammetry and electrochemical impedance spectroscopy revealed changes in Li⁺ ion chemical diffusion coefficient values and charge-transfer resistance with increasing amount of Ag–Cu in prepared powders. The synthesis and structural, morphological and electrochemical evaluation of Li4Ti5O12/Ag–Cu powders, carried out in this work, were also presented here for the first time.

RSC Advances 7 (2017) 52151-52164

http://pubs.rsc.org/en/content/articlehtml/2017/ra/c7ra10608d

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