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

By | December 10, 2016

In this paper we show the discrepancies between the current frequency- and time-domain analyses (i.e. galvanostatic charge/discharge and cyclic voltammetry) being used for characterizing electric double-layer capacitors, and propose new formulae based on Rs-CPE model. See table below.

Constant-current time-voltage (a) and (d), time-energy (b) and (e), and power-energy (c) and (f) profiles of PS and NEC EDLCs respectively. The solid lines represent the experimental data, whereas the dash-dot lines and the dashed lines represent the fitted data using the RsC model and the Rs–CPE(Q, α) model, respectively.

Recapitulative table of the different metrics of EDLC computed from galvanostatic charge and linear voltage sweep using the standard RsC model and the Rs –CPE model.