A superionic state in nano-porous double-layer capacitors: insights from Monte Carlo simulations
作者： S. Kondrat , N. Georgi , M. V. Fedorov , A. A. Kornyshev
DOI: 10.1039/C1CP20798A
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摘要: Recently observed anomalous properties of ionic-liquid-based nanoporous supercapacitors [C. Largot et al., J. Am. Chem. Soc., 2008, 130, 2730-2731] have attracted much attention. Here we present Monte Carlo simulations a model ionic liquid in slit-like metallic nanopores. We show that exponential screening the electrostatic interactions ions inside pore, as well image-charge attraction to pore surface, lead 'anomalous' increase capacitance with decreasing width. The simulation results are good agreement experimental data. function voltage is almost constant for low voltages and vanishes above certain threshold voltage. For very narrow pores, these two regions separated by peak. With size peak turns into bump disappears wide pores. This effect, related specific character voltage-induced filling nanopores counterions at high densities, yet be verified experimentally.
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