Patent ID: 6045952
Filing Date: 2000-04-04
Classification: H01M,Y02E

Abstract:
An electrochemical cell having an anode, a cathode, an electrolyte, and a redox shuttle additive to protect the cell against overcharging selected from the group consisting of selected from the group consisting of:(a) a substituted anisole having the general formula (in an uncharged state): ##STR12## where R.sub.1 is selected from the group consisting of H, OCH.sub.3, OCH.sub.2 CH.sub.3, and OCH.sub.2 phenyl, and R.sub.2 is selected from the group consisting of OCH.sub.3, OCH.sub.2 CH.sub.3, OCH.sub.2 phenyl, and O.sup.- Li.sup.+ ; and(b) a di-anisole compound having the general formula (in an uncharged state): ##STR13## where R is selected from the group consisting of -OCH.sub.3 and -CH.sub.3, m is either 1 or 0, n is either 1 or 0, and X is selected from the group consisting of -OCH.sub.3 (methoxy) or its lithium salt --O.sup.- Li.sup.+.