USE OF A CHELATE COMPLEX WITH BORON AS A LITHIUM SALT FOR LITHIUM BATTERY ELECTROLYTES

A chelate complex with boron, lithium bis[2,3-naphthalenediolato(2-)-O ,O']borate was used in lithium battery electrolytes for Li/V2O5 protot ype cells. This lithium salt remains a safe and thermally stable compo und up to 320 degrees C without melting. A high specific conductivity (4.63 mS cm(-1)) is exhibited in spite of its high viscosity (1.732 cP ) in a 0.5 mol dm(-3) electrolyte(ethylene carbonate-1,2-dimethoxyetha ne (mol ratio 2:3) binary solvent mixture at 25 degrees C. Based on th e discharge characteristics of a Li/V2O5 prototype cell, this lithium salt electrolyte resulted in high energy density (460 Wh kg(-1)) at a cutoff potential of 2.5 V vs. Li/Li+.