초록 ▼

There is provided an electrochemical charge with substantially increased safety. The cell contains a metal anode which can be alloyed by lithium, the preferred metals being selected from calcium, magnesium, and alloys of these, such cell comprising an electrolyte which is an aprotic solvent in which

There is provided an electrochemical charge with substantially increased safety. The cell contains a metal anode which can be alloyed by lithium, the preferred metals being selected from calcium, magnesium, and alloys of these, such cell comprising an electrolyte which is an aprotic solvent in which there is dissolved a suitable lithium salt, a cathode and a cathodic current collector. The anode can be initially charged with lithium. After a certain degree of discharge, certain embodiments of cells of the invention start forming a passivating layer on the anode preventing a runaway reaction.

대표청구항 ▼

An electrochemical cell of increased safety during discharge, adapted to prevent charge reversal and runaway reactions, comprising: a cathode; an anode comprising a metal or metal alloy which can be alloyed with lithium; and a liquid electrolyte comprising an aprotic non-aqueous solvent and a lithiu

An electrochemical cell of increased safety during discharge, adapted to prevent charge reversal and runaway reactions, comprising: a cathode; an anode comprising a metal or metal alloy which can be alloyed with lithium; and a liquid electrolyte comprising an aprotic non-aqueous solvent and a lithium salt dissolved in said solvent, said lithium salt being selected such that the lithium salt is soluble in said solvent and the corresponding salt comprising the metal of the anode and the anion of the lithium salt is substantially insoluble in said solvent; wherein, upon discharge of the electrochemical cell, a passivating layer is formed on the surface of the anode; and wherein, in a charged state of the electrochemical cell, said anode is loaded or charged with lithium.