Rechargeable electrochemical cell

摘要

An electrolyte solution for use in rechargeable electrochemical cells having nickel substrate as working electrode and lithium counter electrode and an electrochemically active amount of LiAsF6 dissolved in dimethyl sulfite and a rechargeability improving amount of lithium carbonate, Li2CO3, contained therein to form electrolyte solution, said solution being capable of passing through a molecular sieve of less than about 5 Angstroms has been developed. A preferred embodiment includes a one molar solution of the LiAsF6 and from about 0.07 to 0.14 molar solution of Li2CO3. The electrolyte solution has 85-90 percent efficiency for cycling lithium on nickel substrate.