Patent ID: 6063526
Filing Date: 2000-05-16
Classification: H01M,Y02E

Abstract:
An electrochemical cell, which comprises:a) an anode comprising an alkali metal;b) a solid cathode of electrically conductive material; andc) a nonaqueous electrolyte activating the anode and the cathode, the nonaqueous electrolyte comprising:i) a dicarbonate additive having the general formula:(R.sup.1 O)C(.dbd.O)OC(.dbd.O)(OR.sup.2), wherein R.sup.1 and R.sup.2 are the same or different and they can both be a hydrogen atom or one of R.sup.1 and R.sup.2 is a saturated or unsaturated organic group if the other of R.sup.1 and R.sup.2 is H or an unsaturated organic group and wherein when any one of R.sup.1 and R.sup.2 is an unsaturated organic group, the unsaturated organic group contain 2 to 13 carbon atoms and has the structure (R.sup.3) (R.sup.4) (R.sup.5)C-- with at least R.sup.3 being an aromatic substituent or an unsaturated organic or inorganic group and R.sup.4 and R.sup.5 being a hydrogen atom or a saturated or unsaturated hydrocarbon or heteroatom group and wherein when R.sup.1 and R.sup.2 are the same they cannot be both saturated organic groups; andii) an alkali metal salt dissolved therein.