Double Layer Structural Effects in Cyclic Voltammetry Curves Complicated with Non-Equilibrium Injection of Charge Carriers into Redox Polymer Films

2017 ◽  
Vol 241 ◽  
pp. 375-385 ◽  
Author(s):  
D.V. Anishchenko ◽  
O.V. Levin ◽  
V.V. Malev
Keyword(s):  
Cyclic Voltammetry ◽  
Double Layer ◽  
Polymer Films ◽  
Charge Carriers ◽  
Structural Effects ◽  
Redox Polymer ◽  
Non Equilibrium

Endgroup and Sidechain Functionalization of Surface-Initiated ROMP Thin Films: Progress Towards ROMP-Based Molecular Wires

2018 ◽  
Author(s):  
Nicholas Marshall
Keyword(s):  
Thin Films ◽  
Contact Angle ◽  
Cyclic Voltammetry ◽  
Polymer Films ◽  
Conjugated Polymer ◽  
Ring Opening ◽  
Molecular Wires ◽  
Metathesis Polymerization ◽  
Cross Metathesis ◽  
Active Ester

A set of experiments in surface-initiated ring-opening metathesis polymerization, including end-functionalization of growing brushes and contact angle/cyclic voltammetry measurements. We report preparation and CV of two different conjugated polymer films, and several endgroup and sidechain functionalization experiments using cross-metathesis and active ester substitution.<br>

Towards highly conducting bicarbazole redox polymer films with plateau-like conductivities

2020 ◽  
Vol 8 (43) ◽  
pp. 15393-15405
Author(s):  
Claudia Malacrida ◽  
Yushi Lu ◽  
Klaus Dirnberger ◽  
Sergio Gámez-Valenzuela ◽  
M. Carmen Ruiz Delgado ◽  
...  
Keyword(s):  
Polymer Films ◽  
Electronic Devices ◽  
Hole Transport ◽  
Chemical Doping ◽  
Redox Polymer ◽  
Hole Transport Layers ◽  
The Stability

Chemical doping of bicarbazole redox polymer films leads to plateau-conductivities up to 2 × 10−2 S cm−1. The stability due to crosslinking and the transparency make them e.g. suitable as hole-transport layers in organic opto-electronic devices.

Layer-by-Layer Assembly of Ferrocene-Modified Linear Polyethylenimine Redox Polymer Films

ChemPhysChem ◽  
2013 ◽  
Vol 14 (10) ◽  
pp. 2149-2158 ◽  
Author(s):  
Jared L. DeLuca ◽  
David P. Hickey ◽  
Daniel A. Bamper ◽  
Daniel T. Glatzhofer ◽  
Matthew B. Johnson ◽  
...  
Keyword(s):  
Polymer Films ◽  
Layer By Layer ◽  
Redox Polymer ◽  
Layer By Layer Assembly ◽  
Linear Polyethylenimine ◽  
Layer Assembly

Electro-osmotic slip and electroconvective instability

2007 ◽  
Vol 579 ◽  
pp. 173-226 ◽  
Author(s):  
B. ZALTZMAN ◽  
I. RUBINSTEIN
Keyword(s):  
Space Charge ◽  
Double Layer ◽  
Electric Double Layer ◽  
Equilibrium Structure ◽  
Stability Study ◽  
Quasi Equilibrium ◽  
Electric Conduction ◽  
Extended Space ◽  
Sequence Of Events ◽  
Non Equilibrium

Electric conduction from an electrolyte solution into a charge selective solid, such as ion exchange membrane or electrode, becomes unstable when the electrolyte concentration near the interface approaches zero owing to diffusion limitation. The sequence of events leading to instability is as follows: upon the decrease of the interface concentration, the electric double layer at the interface transforms from its common quasi-equilibrium structure to a different, non-equilibrium one. The key feature of this new structure is an extended space charge added to the usual one of the quasi-equilibrium electric double layer. The non-equilibrium electro-osmotic slip related to this extended space charge renders the quiescent conductance unstable. A unified asymptotic picture of the electric double-layer undercurrent, encompassing all regimes from quasi-equilibrium to the extreme non-equilibrium one, is developed and employed for derivation of a universal electro-osmotic slip formula. This formula is used for a linear stability study of quiescent electric conduction, yielding the precise parameter range of instability, compared with that in the full electroconvective formulation. The physical mechanism of instability is traced both kinematically, in terms of non-equilibrium electro-osmotic slip, and dynamically, in terms of forces acting in the electric double layer.

scholarly journals Reevaluation of Performance of Electric Double-layer Capacitors from Constant-current Charge/Discharge and Cyclic Voltammetry

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Anis Allagui ◽  
Todd J. Freeborn ◽  
Ahmed S. Elwakil ◽  
Brent J. Maundy
Keyword(s):  
Cyclic Voltammetry ◽  
Double Layer ◽  
Time Domain ◽  
Electric Double Layer ◽  
Constant Current ◽  
Step Response ◽  
Current Voltage ◽  
The Time Domain ◽  
Double Layer Capacitors ◽  
Electric Double Layer Capacitors

Abstract The electric characteristics of electric-double layer capacitors (EDLCs) are determined by their capacitance which is usually measured in the time domain from constant-current charging/discharging and cyclic voltammetry tests, and from the frequency domain using nonlinear least-squares fitting of spectral impedance. The time-voltage and current-voltage profiles from the first two techniques are commonly treated by assuming ideal S s C behavior in spite of the nonlinear response of the device, which in turn provides inaccurate values for its characteristic metrics. In this paper we revisit the calculation of capacitance, power and energy of EDLCs from the time domain constant-current step response and linear voltage waveform, under the assumption that the device behaves as an equivalent fractional-order circuit consisting of a resistance R s in series with a constant phase element (CPE(Q, α), with Q being a pseudocapacitance and α a dispersion coefficient). In particular, we show with the derived (R s , Q, α)-based expressions, that the corresponding nonlinear effects in voltage-time and current-voltage can be encompassed through nonlinear terms function of the coefficient α, which is not possible with the classical R s C model. We validate our formulae with the experimental measurements of different EDLCs.

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