The preparation of new electrolytes for application in lithium or sodium batteries is described. Different salts of lithium and sodium sulfonamide and bis(sulfonyl)imide were prepared in good yields. Ionic conductivity measurements were performed on these salts and conductivities of 0.20 to 0.51 mS cm⁻¹, comparable to those of Li-TFSI, were obtained. The best conductivity was reached for the Li⁺ salt of a bis(sulfonyl)imide bearing CF₃ and 4-FC₆H₄ groups.