Dahn's thianthrene redox shuttle

http://www.google.com/patents?id=qZQXAAAAEBAJ&printsec=frontcover&dq=Redox+shuttles+for+high+voltage+cathodes&source=bl&ots=pTckq6ntnI&sig=0-tTKcgF0J-o3qjM8s39TeEinm0&hl=en&sa=X&ei=2GQ_UMrOGoeq2gX6i4G4DQ&ved=0CEoQ6AEwCQ

18. A method for providing a rechargeable, electrochemical cell, comprising the steps of

providing an anode and a cathode,

providing an electrolyte in contact with said anode and said cathode; and

dissolving within said electrolyte a thianthrene based compound for acting as a redox shuttle reagent to provide overcharge protection to the cell.

19. A method for providing a rechargeable, electrochemical cell according to claim 18 wherein the step of providing an electrolyte includes the step of providing a Li salt dissolved in an organic solvent or a solvent mixture selected from ethers, carbonates esters, sulfones, ketones and lactones.

20. A method for providing a rechargeable, electrochemical cell according to claim 18 wherein the step of providing an electrolyte includes the step of providing a polymer electrolyte comprised of a Li salt, a polymer host and a plasticizer solvent.

21. A method for providing a rechargeable, electrochemical cell according to claim 18 wherein the step of providing a thianthrene containing compound includes the step of providing 2,7-diacetyl thianthrene.