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This paper presents a new equivalent circuit model of hybrid supercapacitor with aqueous electrolyte which can describe its dynamic characteristic during the process of charging and discharging. Firstly, each component of hybrid supercapacitor with aqueous electrolyte was modeled separately. Then the whole equivalent circuit model was built by combining each component' s model. Subsequently the least...
The aim of this work is to study the impedance characteristics at the electrode-electrolyte interface of the PMMA coated probe dipped in milk and milk adulterated with different amount of urea and to propose an electrical equivalent circuit model for each adulteration using curve fitting program. The modelings of the probe with lumped parameters as well as distributed elements are obtained using LEVMW...
The electrochemical impedance spectroscopy (EIS) methodology has been extensively used to study the different aspects of electrochemical and biomedical practices. This paper presents the numerical simulation of impedance for electrode/electrolyte interface. The COMSOLR Multiphysics is used to study the interface impedance. The technology for Micro Electro Mechanical system (MEMS) helps to fabricate...
An alternative approach to develop a large signal time dependent model of a simple electrochemical capacitor is proposed. A simple planar electrochemical cell consisting of two metal electrodes separated by a sulfuric acid electrolyte layer is modeled from first principles. The model is a large signal time dependent model and is valid under constant temperature conditions. The model is based on the...
When developing microelectronic devices for biological applications it is often useful to simulate heterogeneous environments, e.g. metal electrodes in contact with aqueous electrolytes or living cells electrically stimulated. Both in the former and in the latter arises the influence of thin layers like electrodes polarization sheets and cell membranes. The numeric simulation of these systems using...
This paper deals with the fractional order modelling of the supercapacitor voltage response for a given current profile. The model is obtained using the porous electrode theory applied on the supercapacitor case. In order to simplify the complexity of the model, it is assumed that there is no diffusion process in the electrolyte. These assumption leads to neglect the supercapacitor self-discharge...
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