N-BUTYLAMINE AS SOLVENT FOR LITHIUM SALT ELECTROLYTES - STRUCTURE ANDPROPERTIES OF CONCENTRATED-SOLUTIONS

Physical characterizations of some lithium salt solutions in n-butylam ine, such as apparent molar volumes, viscosity, vapour pressure measur ements, solvation numbers by NMR spectroscopy, electrical conductiviti es, electroactivity range...have been carried out showing that this am ine is a good solvent for lithium batteries. Three salts were used, Li NO3, LiTrif and LiTFSI. Solutions of lithium triflate or LiTFSI are st able toward lithium and possess a good conductivity (better than 3 x 1 0(-3)S cm(-1) at +20 degrees C) for concentrations far from the satura tion (the maximum of conductivity laying within the salt mole fraction interval 0.1-0.2 for LiSO3CF3 . xn-Bu) and an electroactivity range o f 4.5 V at a smooth Pt electrode. Copyright (C) 1996 Elsevier Science Ltd