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

Patent · Tue Apr 04 04:00:00 EDT 2000

OSTI ID:20023277

Kerr, J B; Tian, M

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: US Department of Energy
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 20023277
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
ADDITIVES
ANISOLE
BATTERY CHARGING
CHEMICAL COMPOSITION
ELECTRIC BATTERIES
EQUIPMENT PROTECTION DEVICES
LITHIUM COMPOUNDS
MOLECULAR STRUCTURE