Electrolyte Engineering: Optimizing High‐Rate Double‐Layer Capacitances of Micropore‐ and Mesopore‐Rich Activated Carbon

Various types of electrolyte cations as well as binary cations are used to optimize the capacitive performance of activated carbon (AC) with different pore structures. The high‐rate capability of micropore‐rich AC, governed by the mobility of desolvated cations, can outperform that of mesopore‐rich AC, which essentially depends on the electrolyte conductivity. Charged with a salt: Micropore‐rich activated carbon (AC) was tested as a supercapacitor material. The high‐rate capability is governed by desolvated cation mobility, and outperforms the related mesopore‐rich AC where electrolyte conductivity takes precedence.