Modeling of Interdigitated Electrodes and Supercapacitors with Porous Interdigitated Electrodes

Latimer, Katherine; Cowell, Martin; Wright, Paul K.

doi:10.1149/2.0061706jes

Cited by 9 publications

(2 citation statements)

References 11 publications

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“…In this way, the otherwise nontrivial cell constant of the IDE system may be approximated by an equivalent parallel plate configuration. 24,25 Based on the derivation for an IDE with a thin film coating by Gevorgian and others, Nigon et al approximate the coplanar IDEs as a N-1 parallel plate electrodes with surface area l•h and an effective electrode spacing d+ d. 25,26 The additional term d describes the effective increase in the distance between the two electrodes due to the elliptic nature of the field lines and is a function of the film height ( d ≈ 1.342h). When the film height is sufficiently small relative the electrode spacing, this additional contribution becomes negligibly small.…”

Section: Dependence Of Measured Impedance On Ide Geometry-linear Rela...mentioning

confidence: 99%

Interrogation of Electrochemical Properties of Polymer Electrolyte Thin Films with Interdigitated Electrodes

Sharon

Bennington

Liu

et al. 2018

J. Electrochem. Soc.

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The ability to characterize bulk and interfacial transport properties of polymer electrolytes is critical to realizing their potential applications in electrochemical energy storage devices. In this study, we leverage custom microfabricated interdigitated electrode array (IDEs) as a platform to probe ion transport properties of polymer electrolytes films through electrochemical impedance spectroscopy (EIS) measurements. Using poly(ethylene oxide) (PEO) blended with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) as a model dry polymer electrolyte system, we investigate how geometric parameters of the IDEs influence the quality and analysis of EIS measurements. By focusing on films on the nanometer film thickness (ca. 50 nm), EIS measurements revealed diffusional processes near the electrode/polymer interface that may be difficult to observe with conventional thick films. Moreover, irreversible impedance spectra were observed at elevated temperatures when using IDEs with large electrode metal fractions. These irreversible processes were eliminated through passivation of the IDE with different oxides (SiO 2 , Al 2 O 3 , or TiO 2 ). Ultimately, the ionic conductivity of PEO-LiTFSI electrolytes is confidently determined when appropriate IDE geometries and equivalent circuits are used. Our work demonstrates the use of IDEs and nanothin polymer electrolytes films as a versatile platform for rapid and efficient interrogation of both bulk and interfacial electrochemical properties.

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Section: Dependence Of Measured Impedance On Ide Geometry-linear Rela...mentioning

confidence: 99%

Interrogation of Electrochemical Properties of Polymer Electrolyte Thin Films with Interdigitated Electrodes

Sharon

Bennington

Liu

et al. 2018

J. Electrochem. Soc.

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“…The effects of porosity and the electrode’s particle size on the diffuse-layer capacitance have been discussed in detail. The interdigitated electrode geometry is preferred for miniaturized, portable, and wearable electronic devices. − The continuum study has been applied to interdigitated electrodes, considering the electrolyte ion size, nonuniform ion concentration, and electric potential distribution in the electrolyte. The interdigitated electrodes have less amount of active material, and the aqueous electrolyte-based supercapacitors lead to higher capacitance and power density due to the higher ionic conductivity of the electrolyte .…”

Section: Introductionmentioning

confidence: 99%

Simulation Study of Electric Double-Layer Capacitance of Ordered Carbon Electrodes

Nigam

Kar

2022

Langmuir

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Supercapacitors are electrochemical energy storage devices having high capacitance, high power density, long cycle life, low cost, easy maintenance, and negligible environmental pollution. The formation of an electric double layer at the electrode–electrolyte interface is mostly responsible for supercapacitors’ energy storage. The simulation study of equilibrium electric double-layer capacitance (EDLC) in 3D arranged mesoporous carbon electrodes with a simple cubic morphology and interdigitated electrodes has been done. Continuum theory has been utilized to study the underlying processes involved in EDLC. Interfacial polarization and ion crowding depend on the electrode’s critical thickness. Porosity increases the capacitance due to the increase in the electrode surface area. The diffuse-layer specific capacitance of ordered mesoporous carbon electrodes in a (C2H5)4NBF4/propylene carbonate organic electrolyte is in the range of 3.2–13.3 μF cm–2, varying according to the electrode thickness. The Stern-layer specific capacitance is 167.6 μF cm–2, and total equilibrium EDLC is in the range of 3.1–12.3 μF cm–2. The effect of the electric field at the electrode–electrolyte interface on reducing electrolyte permittivity has also been discussed. The EDLC of carbonized interdigitated electrodes is analyzed in a 6 M KOH electrolyte. The diffuse-layer specific capacitance ranges from 118.7 to 352.0 μF cm–2 depending on the width of the interdigitated electrodes. The Stern-layer specific capacitance is 91.2 μF cm–2, and the total EDLC value is 51.6–72.4 μF cm–2. The modeling and simulation approach can be applied to different mesoporous electrodes by varying the supercapacitor component’s parameters and geometry.

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Gold nanourchin on multiple‐point dielectrode for glucose biosensing by current‐potential measurement

Chen,

Huang,

Zhou

2024

Biotech and App Biochem

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Gestational diabetes (GD) is a condition characterized by elevated blood sugar levels during pregnancy. GD poses various health risks, such as serious birth injuries, the need for cesarean delivery, and the necessity of newborn care. Monitoring glucose levels is essential for ensuring safe delivery and reducing the risks to both the mother and fetus. Various sensors are readily available for monitoring glucose levels, and researchers are continually working to develop highly sensitive glucose sensors. This research aimed to develop a gold nanourchin (AuNU)‐hybrid biosensor for quantifying glucose on a multi‐point electrode sensor. Glucose oxidase (GOx) was attached to the AuNU and seeded on the sensing surface using an amine linker. The current‐potential (1–2 V at 0.1 V sweep) was recorded for the GOx–glucose interaction, with a limit of detection of 560 μM and a regression coefficient (R2) of 0.9743 [y = 0.9106x − 0.9953] on the linear curve. The sensitivity was estimated to be 3.5 mAcm−2M−1. Furthermore, control experiments with galactose, sucrose, and fructose did not yield an increase in current‐potential, confirming specific glucose detection. This experiment helps in monitoring glucose levels to manage conditions associated with GD.

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Modeling of Interdigitated Electrodes and Supercapacitors with Porous Interdigitated Electrodes

Cited by 9 publications

References 11 publications

Interrogation of Electrochemical Properties of Polymer Electrolyte Thin Films with Interdigitated Electrodes

Interrogation of Electrochemical Properties of Polymer Electrolyte Thin Films with Interdigitated Electrodes

Simulation Study of Electric Double-Layer Capacitance of Ordered Carbon Electrodes

Gold nanourchin on multiple‐point dielectrode for glucose biosensing by current‐potential measurement

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