New Approach for Investigating Diffusion Kinetics Within Capacitive Deionization Electrodes Using Electrochemical Impedance Spectroscopy

Capture and detection of Escherichia coli with graphene aerogels

“…In general, the slope of the low frequency region is related to the electrode pore size distribution. 32 During cell–electrode binding, a steeper slope suggests a narrower pore size distribution of the substrate, which implies a higher diffusion resistivity of the substrate, 33 while a lower slope implies a lower diffusion resistivity, and with the passage of time, the slope of the curve gradually decreases, indicating that the diffusion resistivity gradually decreases after the addition of E. coli .…”

Sputtered binder-free Cu3N electrode materials for high-performance quasi-solid-state asymmetric supercapacitors

“…In the low-frequency region, the Nyquist plot shows a deviation from the vertical line with an inclined angle between 45 and 90 degrees against the real axis, indicating a combination of capacitive and surface diffusion behaviors. 35 Moreover, the intercept of the semicircle on the real axis arc in the high-frequency region gives internal resistance ( R e , 2.54 Ω m −2 ), while the small arc denotes the charge transfer resistance ( R ct , 4.18 Ω m −2 ). 36 The good electrical conductivity and fast charge transfer ability eventually contribute to the good electrochemical capacitive performance of the Cu 3 N electrodes.…”

Iron-Based 2D Conductive Metal–Organic Framework Nanostructure with Enhanced Pseudocapacitance

“…Electrochemical impedance spectroscopy (EIS) of M–HHTP (M = Cu, Ni, and Fe) confirms that in the high-frequency region, where it typically indicates charge transport resistance, the resistances found to be varied on the order of Cu–HHTP < Ni–HHTP < Fe–HHTP, corroborating the measured electrical conductivity values. In the mid-frequency region, impedance is dominated by ion diffusion through the electrode . The EIS showed their diffusion resistances on the order of Fe–HHTP > Ni–HHTP > Cu–HHTP.…”

“…In the mid-frequency region, impedance is dominated by ion diffusion through the electrode. 43 The EIS showed their diffusion resistances on the…”