Strategies for fast ion transport in electrochemical capacitor electrolytes from diffusion coefficients, ionic conductivity, viscosity, density and interaction energies based on HSAB theory

To elucidate factors affecting ion transport in capacitor electrolytes, five propylene carbonate (PC) electrolytes were prepared, each of which includes a salt ((C2H5)4NBF4, (C2H5)4NPF6, (C2H5)4NSO3CF3, (C2H5)3CH3NBF4and LiBF4).