Boosting the Performance of Ionic-Liquid-Based Supercapacitors with Polar Additives

摘要: Recent years have witnessed growing interests in both the fundamentals and applications of electric double layer capacitors (EDLCs), also known as supercapacitors. A number strategies been explored to optimize device performance terms energy power densities. Because properties layers (EDL) are sensitive ion distributions close vicinity electrode surfaces, supercapacitor is pore structure electrolyte composition. In this work, we study effects polar additives on EDLC capacitance using classical density functional theory within framework a coarse-grained model for microscopic porous electrodes room-temperature ionic liquids. The theoretical results indicate that highly polar, low-molecular-weight additive able drastically increase at low bulk concentration. Additionally, dampen oscill...