Highly-Loaded Sulfur Electrode upon Cycling in Li/S Batteries: Application of Electrochemical Impedance Spectroscopy and In Situ X-ray Diffraction

2014 ◽  
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
X Ray Diffraction ◽  
X Ray ◽  
Highly Loaded ◽  
Sulfur Electrode

scholarly journals In situ anodization of aluminum surfaces studied by x-ray reflectivity and electrochemical impedance spectroscopy

2014 ◽  
Vol 116 (3) ◽  
pp. 034902 ◽  
Author(s):  
F. Bertram ◽  
F. Zhang ◽  
J. Evertsson ◽  
F. Carlà ◽  
J. Pan ◽  
...  
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
X Ray ◽  
Aluminum Surfaces

scholarly journals Correlation between Electrochemical Impedance Spectroscopy and Structural Properties of Amorphous Tunisian Metanacrite Synthetic Material

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Nouha Jaafar ◽  
Hafsia Ben Rhaiem ◽  
Abdessalem Ben Haj Amara
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Electronic Conduction ◽  
X Ray Diffraction ◽  
Synthetic Material ◽  
X Ray ◽  
Synthetic Product ◽  
Transmission Electron ◽  
Semiconductor Behavior

In the present work, we report the structural and electrochemical properties of metanacrite. Metanacrite is a synthetic material originated by heating (550°C) of a clay mineral (Tunisian nacrite) belonging to the kaolin group. The structure of the amorphous synthetic product was corroborated by X-ray diffraction (disappearing of nacrite peaks) and infrared spectroscopy (disappearing of Al–OH and water bands). The decomposition of the silicate framework was confirmed by transmission electron microscope (TEM). The obtained metanacrite synthetic material was also examined by electrochemical impedance spectroscopy (EIS). Accordingly, the electronic conduction is followed by the correlated barrier hopping (C.B.H.) model. Therefore, by combining ac and dc electrical conductivity, a semiconductor behavior is evidenced. The dependence of the dielectric constant (ε′) and dielectric loss (ε″) on both temperature and frequency is also discussed.

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