Redox shuttles for overcharge protection of lithium batteries

Amine, Khalil; Chen, Zonghai; Wang, Qingzheng

Redox shuttles for overcharge protection of lithium batteries

Patent · Tue Dec 14 04:00:00 EST 2010

OSTI ID:1011384

Amine, Khalil ^[1]; Chen, Zonghai ^[1]; Wang, Qingzheng ^[2]

Downers Grove, IL
San Jose, CA

The present invention is generally related to electrolytes containing novel redox shuttles for overcharge protection of lithium-ion batteries. The redox shuttles are capable of thousands hours of overcharge tolerance and have a redox potential at about 3-5.5 V vs. Li and particularly about 4.4-4.8 V vs. Li. Accordingly, in one aspect the invention provides electrolytes comprising an alkali metal salt; a polar aprotic solvent; and a redox shuttle additive that is an aromatic compound having at least one aromatic ring with four or more electronegative substituents, two or more oxygen atoms bonded to the aromatic ring, and no hydrogen atoms bonded to the aromatic ring; and wherein the electrolyte solution is substantially non-aqueous. Further there are provided electrochemical devices employing the electrolyte and methods of making the electrolyte.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: W-31109-ENG-38

Assignee:: CHO

Patent Number(s):: 7,851,092

Application Number:: 11/366,891

OSTI ID:: 1011384

Country of Publication:: United States

Language:: English

References (19)

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