Salinity gradient energy between the concentrated and diluted electrolyte solutions can be converted to electric energy by using reverse electrodialysis (RED) technology. Electrolyte solution is a vital factor that impacts the energy conversion efficiency. Potassium acetate (KAc) was chosen as solute

and water

ethanol

2

2

2-trifluoroethanol (TFE)

2-propanol (IPA) and several of their binary mixtures were selected as solvents. Electric conductivity of these solutions were measured under varying conditions. KAc was easily ionized in water and possessed the maximum electric conductivity

following by KAc-H

2

O-TFE and KAc-H

2

O-ethanol

and then KAc in pure TFE

ethanol

and IPA respectively. For electric convertibility of these solutions working in a RED power generation system

it was found that the KAc-H

2

O possessed the maximum power density

and the KAc-ethanol-H

2

O possessed the larger open circuit voltage than aqueous KAc solution under the same working condition. Besides

it was observed that both the electric conductivity and electric convertibility were significantly influenced by the concen

tration and temperature of solution. With the increasing of concentration

electric conductivity of these solutions increased firstly and then reached to the peak

but later it decreased. Solution temperature took a positive impact role to the electric conductivity. Electric conductivity of these solutions can be estimated by using a modified amplitude version of Gaussian peak function.