Measurement of Impedance of AGM Solar Battery for RAPS Applications

2021 ◽  
Vol 105 (1) ◽  
pp. 151-158
Author(s):  
Petr Křivík ◽  
Petr Baca ◽  
Jiri Kazelle
Keyword(s):  
Charge Transfer ◽  
Double Layer ◽  
Imaginary Part ◽  
Charge Transfer Resistance ◽  
Lead Acid Battery ◽  
Transfer Resistance ◽  
Ohmic Resistance ◽  
Double Layer Capacity ◽  
Solar Battery ◽  
Impedance Parameters

The paper deals with the measurement of the cell impedance parameters during discharging and charging of the AGM 200Ah 6V Sun Power lead acid battery. Real and imaginary part of impedance of the battery were measured by PEIS method. Results of the impedance changes during discharging and charging were plot to Nyquist diagrams. Important values - ohmic resistance RS, charge transfer resistance RCT, double layer capacity CDL and Warburg coefficient σ were found during discharging and charging of the solar battery.

scholarly journals Influence of digene tablet juice orally taken in on the corrosion resistance of orthodontic wire made of SS 18/8 in presence of artificial saliva

2021 ◽  
Vol 62 (3) ◽  
pp. 220-227
Author(s):  
Chandrasekaran Priya ◽  
Antony Regis ◽  
Susai Rajendran
Keyword(s):  
Corrosion Resistance ◽  
Charge Transfer ◽  
Double Layer ◽  
Artificial Saliva ◽  
Corrosion Current ◽  
Charge Transfer Resistance ◽  
Double Layer Capacitance ◽  
Orthodontic Wires ◽  
Transfer Resistance ◽  
Orthodontic Wire

Dentists make use of orthodontic wires such as SS 18/8, SS 316, Ni-Cr etc., to regulate the growth of teeth. In the saliva environment these wires undergo corrosion. Aside from this, they undergo corrosion by the food items, juices and Tablets orally in taken. Corrosion resistance of SS 18/8 alloy in artificial saliva (AS) , in the absence and presence of Digene Tablet juice, has been investigated by polarization and AC impendance techniques. It is inferred that corrosion resistance of SS 18/8 alloy in artificial saliva decreases in presence of Digene Tablet. This is exposed by decrease in Linear Polarization Resistance (LPR) value, Charge transfer resistance (Rt) value, in impedance value, and increase in corrosion current and double layer capacitance value(Cdl). In presence of Digene Tablet, the LPR value decreases from 3488228 to 1629535 Ohmcm2. The corrosion current value increases from 1.447 x10-8 to 2.637x10-8A/cm2 . The Charge transfer resistance (Rt) value decreases from 37796 to 10481Ohmcm2 . The double layer capacitance value increases from 1.349x10-10 F/cm2 to 4.866x10-10F/cm2. The impedance value decreases from 4.857 to 4.428. Hence it implies that people with orthodontic wire made of SS 18/8 alloy should avoid taking Digene Tablet juice orally.

Nanopore Size Estimation Using Electrochemical Impedance Spectroscopy Analysis

2008 ◽  
Author(s):  
Gou-Jen Wang ◽  
Ming-Chun Chien
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Pore Size ◽  
Double Layer ◽  
Electrochemical Impedance ◽  
Charge Transfer Resistance ◽  
Ion Concentration ◽  
Size Estimation ◽  
Transfer Resistance ◽  
Impedance Parameters

We present a simple and cost effective approach using electrochemical impedance spectroscopy (EIS) for accurate pore size estimation of silicon based nano-pores. This method accounts for the capacitor effects of the electrical double layer and the resistor effects of the ion concentration inside the nano-channel. The nano-pore impedance was modeled as the electrolyte charge transfer resistance Rs in a series connection with a parallel ion diffusion circuit Rf with a constant phase element (CPE) that models the behaviour of the double layer. The EIS analysis that has been widely employed to measure the energy storage and dissipation properties of a physicochemical system in frequency domain was adopted to sense the impedance parameters of the nano-pore. The nano-pore size was then estimated based on the impedance parameters. The accuracy of the estimated nano-pore size was verified by the TEM image.

scholarly journals Effect of nanostructured carbon coatings on the electrochemical performance of Li1.4Ni0.5Mn0.5O2+ x -based cathode materials

2016 ◽  
Vol 7 ◽  
pp. 1960-1970 ◽  
Author(s):  
Konstantin A Kurilenko ◽  
Oleg A Shlyakhtin ◽  
Oleg A Brylev ◽  
Dmitry I Petukhov ◽  
Alexey V Garshev
Keyword(s):  
Diffusion Coefficient ◽  
Charge Transfer ◽  
Specific Capacity ◽  
Charge Transfer Resistance ◽  
Poly Vinyl Alcohol ◽  
Nanostructured Carbon ◽  
Transfer Resistance ◽  
Carbon Coatings ◽  
Lithium Diffusion Coefficient ◽  
Electrochemical Cycling

Nanocomposites of Li1.4Ni0.5Mn0.5O2+ x and amorphous carbon were obtained by the pyrolysis of linear and cross-linked poly(vinyl alcohol) (PVA) in presence of Li1.4Ni0.5Mn0.5O2+ x . In the case of linear PVA, the formation of nanostructured carbon coatings on Li1.4Ni0.5Mn0.5O2+ x particles is observed, while for cross-linked PVA islands of mesoporous carbon are located on the boundaries of Li1.4Ni0.5Mn0.5O2+ x particles. The presence of the carbon framework leads to a decrease of the polarization upon cycling and of the charge transfer resistance and to an increase in the apparent Li+ diffusion coefficient from 10−16 cm2·s−1 (pure Li1.4Ni0.5Mn0.5O2+ x ) to 10−13 cm2·s−1. The nanosized carbon coatings also reduce the deep electrochemical degradation of Li1.4Ni0.5Mn0.5O2+ x during electrochemical cycling. The nanocomposite obtained by the pyrolysis of linear PVA demonstrates higher values of the apparent lithium diffusion coefficient, a higher specific capacity and lower values of charge transfer resistance, which can be related to the more uniform carbon coatings and to the significant content of sp2-hybridized carbon detected by XPS and by Raman spectroscopy.

Estimation of continuity of electroactive inorganic films based on apparent anti-Ohmic trend in their charge transfer resistance

2016 ◽  
Vol 219 ◽  
pp. 588-591 ◽  
Author(s):  
Maria A. Komkova ◽  
Elena V. Karpova ◽  
Grigory A. Sukhorukov ◽  
Alexey A. Sadovnikov ◽  
Arkady A. Karyakin
Keyword(s):  
Charge Transfer ◽  
Charge Transfer Resistance ◽  
Transfer Resistance ◽  
Inorganic Films
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