Electrochemical storage cell containing a substituted anisole or di-anisole redox shuttle additive for overcharge protection and suitable for use in liquid organic and solid polymer electrolytes
A electrochemical cell is described comprising an anode, a cathode, a solid polymer electrolyte, and a redox shuttle additive to protect the cell against overcharging where the redox shuttle additive is selected from the group consisting of: (a) a substituted anisole having the general formula (in an uncharged state) as shown in a diagram 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 {minus}}Li{sup +}; and (b) a di-anisole compound having the general formula (in an uncharged state) as shown in a second diagram 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 {minus}}Li{sup +}. The lithium salt of the di-anisole is the preferred form of the redox shuttle additive because the shuttle anion will then initially have a single negative charge. It loses two electrons when it is oxidized at the cathode, and then moves toward the anode as a single positively charged species where it is then reduced to a single negatively charged species by gaining back two electrons.
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 20023277
- Resource Relation:
- Other Information: PBD: 4 Apr 2000
- Country of Publication:
- United States
- Language:
- English
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Electrochemical storage cell containing a substituted anisole or di-anisole redox shuttle additive for overcharge protection and suitable for use in liquid organic and solid polymer electrolytes
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