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Technology Commercialization and Partnerships Division

Novel Redox Shuttles for Overcharge Protection of Lithium-ion Batteries (ANL-IN-05-012)

Battery overcharge protection, increased safety and long-term stability
Charge Transfer Mechanism for Li-ion Battery Overcharge Protection: The boron and fluorine additive is in the electrolyte.

The Invention 

Electrolytes containing novel redox shuttles (electron transporters) for overcharge protection of lithium-ion batteries. The electrolytes can be alkali metal salts or polar aprotic solvents, and the shuttle is an aromatic compound with at least one aromatic ring with four or more electronegative substituents, two or more oxygen atoms bonded to the aromatic ring, or no hydrogen atoms bonded to the aromatic ring. The electrolyte solution is non-aqueous. These redox shuttles are capable of thousands of hours of overcharge tolerance—the dangerous voltage of the battery will never be reached even when over-abused. 


  • Provides thousands of hours of overcharge protection; 
  • Increases the safety of lithium-ion batteries; 
  • Compatible with current battery technology as it is very soluble in conventional carbonate-based electrolytes; and 
  • Increases battery long-term stability and oxidation potential. 

Applications and Industries 

Electrodes used in batteries for 

  • Electric and plug-in hybrid electric vehicles; 
  • Portable electronic devices; 
  • Medical devices; and 
  • Space, aeronautical, and defense-related devices. 

Developmental Stage 

Development continues on the low cost synthesis of the material