Charging dynamics of electric double layer nanocapacitors in mean-field
arXiv:2301.00610 · doi:10.1103/72b9-c8cq
Abstract
An electric double layer capacitor (EDLC) stores energy by modulating the spatial distribution of ions in the electrolytic solution that it contains. We determine the mean-field time scales for planar EDLC relaxation to equilibrium, after a potential difference is applied. We tackle first the fully symmetric case, where positive and negative ionic species have same valence and diffusivity, and then the general, more complex, asymmetric case. Depending on applied voltage and salt concentration, different regimes appear, revealing a remarkably rich phenomenology relevant for nanocapacitors.
References in corpus (5)
- A Blessing and a Curse: How a Supercapacitor's Large Capacitance Causes its Slow Charging
- Boosting capacitive blue-energy and desalination devices with waste heat
- Transient response of an electrolyte to a thermal quench
- Frequency and field-dependent response of confined electrolytes from Brownian dynamics simulations
- Poisson-Nernst-Planck charging dynamics of an electric double layer capacitor: symmetric and asymmetric binary electrolytes