Temperature dependence of the complex shear modulus of cation and anion exchanging poly(pyrrole) films

Ion and solvent transfers accompanying redox switching of polypyrrole films immersed in divalent anion solutions

“…Acoustic impedance was used to determine mechanical properties (in the form of storage and loss shear moduli, G and G ) for PPy films grown from lithium perchlorate and sodium ptoluenesulfonate solutions; oxidized (doped) films were stiffer [31]. Recently, the temperature dependence of the complex shear modulus of PPy exposed to different electrolytes was determined over the range 15-50 • C: both G and G decrease for anion-exchanging films but both are constant for cation exchanging films [32]. In a corrosion application, duplex polypyrrole films were grown on iron, with the inner film containing oxalate anions and the outer film containing dodecylsulfate anions.…”

Microgravimetric and Spectroscopic Analysis of Solid−Electrolyte Interphase Formation in Presence of Additives

“…All together: the structural effects and the solid‐liquid contact have a superimposed behavior on the energy balance of the oscillating system, leading to a cumulative increase of the resonance frequency damping, Δw . As a result, the response of the piezoelectric resonator displays a complex frequency shift, Δf* , given by Equation (2), where w and w 0 are the damping of the loaded and unloaded quartz, respectively and . …”

“…EQCM offers an accurate detection of small mass changes on the surface of quartz piezoelectric resonator used as a working electrode. The method has a substantial impact on in‐situ analysis of the viscoelastic properties and roughness of conductive polymers and electrodeposited silicon layers . EQCM is used to characterize the electrochemical cathodic passivation of noble metal coated resonators in a number of Li + containing organic electrolytes, including LiClO 4 /propylene carbonate (PC), LiAsF 6 /PC, and LiClO 4 /ethylene carbonate:dimethyl carbonate (EC:DMC) ,.…”

“…The method has a substantial impact on insitu analysis of the viscoelastic properties and roughness of conductive polymers and electrodeposited silicon layers. [8][9][10][11][12][13] EQCM is used to characterize the electrochemical cathodic passivation of noble metal coated resonators in a number of Li + containing organic electrolytes, including LiClO 4 /propylene carbonate (PC), LiAsF 6 /PC, and LiClO 4 /ethylene carbonate: dimethyl carbonate (EC:DMC). [14,15] Recently, a real breakthrough in the microgravimetric analysis of the battery electrode interfaces has been achieved by applying QCM in combination with dissipation monitoring.…”

Understanding the charge storage mechanism of conductive polymers as hybrid battery-capacitor materials in ionic liquids by in situ atomic force microscopy and electrochemical quartz crystal microbalance studies

“…In this work, the changes in the shear modulus were studied instead of the quantitative mass changes of the polymer during charging/discharging cycles because the damping change of the viscoelastic polymer lm is expected to be higher than the resonance frequency changes. The nal equations 20,[23][24][25][26][27][28][29][30][31][32][33][34][35][36] for numerically solving the lm impedance and shear modulus were calculated 20,24,25 (eqn (5) and (6)) with the soware package Mathematica® (ESI †) using…”