An investigation of lithium transport through vanadium pentoxide xerogel film electrode by analyses of current transient and ac-impedance spectra

2004 ◽  
Vol 49 (25) ◽  
pp. 4371-4378 ◽  
Author(s):  
Kyu-Nam Jung ◽  
Su-Il Pyun ◽  
Jong-Won Lee
Keyword(s):  
Vanadium Pentoxide ◽  
Ac Impedance ◽  
Current Transient ◽  
Film Electrode ◽  
Impedance Spectra ◽  
Lithium Transport ◽  
Ac Impedance Spectra

scholarly journals Corrosion Behaviour of Metals in Artificial Tear Solution

2016 ◽  
Vol 8 (3) ◽  
pp. 1716-1735
Author(s):  
C. Kumar ◽  
A. John Amal Raj ◽  
S.K. Selvaraj
Keyword(s):  
Corrosion Resistance ◽  
Mild Steel ◽  
Corrosion Behaviour ◽  
Ac Impedance ◽  
Impedance Spectra ◽  
Artificial Tear ◽  
Polarization Study ◽  
Ac Impedance Spectra

Human tear comes in contact with a number of instruments during operation in the eyes.  This results in a variety of undesirable effects such as corrosion and malfunction.  Corrosion behaviour of five metals, namely, mild steel (MS), mild steel coated with zinc (MS-Zn), Ni-Cr, Ni-Ti super elastic (Ni-Ti.SE), and SS 316 L in artificial tear solution has been studied by polarization study and AC impedance spectra.  The study reveals that the decreasing order of corrosion resistance in artificial tear solution is : Ni-Ti SE > Ni-Cr > SS 316 L > MS-Zn > MS.  The first three metals are better candidates and the first one is the best candidate for making instruments used in operation in the eyes, in presence of tears.

AC Impedance Spectra Arising from Mixed Ionic Electronic Solid Electrolytes

2004 ◽  
Vol 151 (5) ◽  
pp. E186 ◽  
Author(s):  
Alan Atkinson ◽  
Sylvia A. Baron ◽  
Nigel P. Brandon
Keyword(s):  
Solid Electrolytes ◽  
Ac Impedance ◽  
Impedance Spectra ◽  
Ac Impedance Spectra

Influence of excess lithium and sintering on the conductivity of Li1.3Al0.3Ti1.7(PO4)3

2019 ◽  
Vol 12 (04) ◽  
pp. 1950047 ◽  
Author(s):  
Ziying Li ◽  
Xiujian Zhao
Keyword(s):  
Ionic Conductivities ◽  
Lithium Content ◽  
Impedance Spectra ◽  
X Ray Diffraction ◽  
Conventional Solid State Reaction ◽  
X Ray ◽  
Lithium Transport ◽  
Li Ion ◽  
Ac Impedance Spectra ◽  
Addition Amount

NASICON-type samples with different amount of excess lithium content in starting materials, Li[Formula: see text]Al[Formula: see text]Ti[Formula: see text](PO4)3 ([Formula: see text]), were prepared by conventional solid-state reaction. Effect of excess lithium and sintering conditions on composition and electrical properties of LATP were investigated. X-ray diffraction and Scanning electron microscopy were used to characterize the composition, crystal structure and morphology, respectively. The total ionic conductivities of samples were measured by AC-impedance spectra. The optimal addition amount of excess Li was found to be 40[Formula: see text]mol.% with the highest conductivity of [Formula: see text][Formula: see text]S/cm at [Formula: see text]C. The improvement of the conductivity of LATP can be attributed to the increasing of Li[Formula: see text] carriers and the formation of glassy phase in samples which acted as binders and provided excess Li ion vacancies for lithium transport.

INVESTIGATIONS ON THE ELECTRICAL PROPERTIES OF ZnO NANORODS AND COMPOSITES FOR PHOTOVOLTAIC AND ELECTROCHEMICAL APPLICATIONS

2011 ◽  
Vol 10 (01n02) ◽  
pp. 81-85 ◽  
Author(s):  
PARAMESWAR HARI ◽  
MICHAL BYRCZEK ◽  
DALE TEETERS ◽  
PRAVIN UTEKAR
Keyword(s):  
Polyethylene Oxide ◽  
Indium Tin Oxide ◽  
Zno Nanorods ◽  
Ac Impedance ◽  
Zno Films ◽  
Zno Nanorod ◽  
Impedance Spectra ◽  
Atomic Force ◽  
Ac Impedance Spectra ◽  
Zno Rods

ZnO nanorods grown by hydrothermal technique on glass, Zinc, and Indium tin oxide (ITO) substrates exhibit both open and closed hexagonal structures. On the nanoscale, closed ZnO nanostructures exhibit two types of ion conduction regions as revealed by AC-impedance spectra collected through the tip of an atomic force microscope (AFM). One region has higher impedance values (apparent values of approximately 107 ohms) with two semicircles. Two semicircles are indicative of a ZnO structure composed of bulk and grain boundary conduction. Other regions were found to have impedance values that were two orders of magnitude lower (apparent values of 105 ohms). This indicates that these ZnO films have two conduction pathways. The polyethylene oxide ( PEO )– ZnO nanorod composite was made by spin-coating the ZnO rods growing from the ITO substrate with PEO. In the PEO – ZnO composite film, only the AC impedance values of 105 ohms were observed. This is higher than PEO electrolyte without ZnO nanorods. Since regions of higher impedance were not seen in the PEO – ZnO nanorod composites, the polymer electrolyte either dominated the conduction of the system or suppressed the first pathway of higher impedance in the ZnO rods.

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