## double-layer current

https://doi.org/10.1351/goldbook.D01847
The non-faradaic current associated with the charging of the electrical double layer at an electrode-solution interface, given by: $i_{\mathrm{DL}}=\frac{\mathrm{d}(\sigma \ A)}{\mathrm{d}t}$ where σ = surface charge density of the double layer, A = area of the electrode-solution interface and t = time. Capital letters should be used as subscripts to avoid the possibility of confusing this symbol with that for the limiting diffusion current.
Source:
PAC, 1985, 57, 1491. 'Recommended terms, symbols, and definitions for electroanalytical chemistry (Recommendations 1985)' on page 1496 (https://doi.org/10.1351/pac198557101491)