Chemical overcharge protection of lithium and lithium-ion secondary batteries

Patent · Fri Jan 01 00:00:00 EST 1999

OSTI ID:872099

Abraham, Kuzhikalail M ^[1]; Rohan, James F ^[2]; Foo, Conrad C ^[3]; Pasquariello, David M ^[4]

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1. Needham, MA
2. Cork City, IE
3. Dedham, MA
4. Pawtucket, RI

This invention features the use of redox reagents, dissolved in non-aqueous electrolytes, to provide overcharge protection for cells having lithium metal or lithium-ion negative electrodes (anodes). In particular, the invention features the use of a class of compounds consisting of thianthrene and its derivatives as redox shuttle reagents to provide overcharge protection. Specific examples of this invention are thianthrene and 2,7-diacetyl thianthrene. One example of a rechargeable battery in which 2,7-diacetyl thianthrene is used has carbon negative electrode (anode) and spinet LiMn.sub.2 O.sub.4 positive electrode (cathode).

• Research Organization: United States Advanced Battery Consortium, Dearborn, MI (US)
• DOE Contract Number: FC02-91CE50336
• Assignee: EIC Laboratories, Inc. (Norwood, MA)
• Patent Number(s): US 5858573
• OSTI ID: 872099
• Country of Publication: United States
• Language: English

Related Subjects

chemical
overcharge
protection
lithium
lithium-ion
secondary
batteries
features
redox
reagents
dissolved
non-aqueous
electrolytes
provide
cells
metal
negative
electrodes
anodes
particular
compounds
consisting
thianthrene
derivatives
shuttle
specific
examples
7-diacetyl
example
rechargeable
battery
carbon
electrode
anode
spinet
limn
positive
cathode
secondary batteries
aqueous electrolyte
rechargeable battery
specific examples
negative electrodes
positive electrode
negative electrode
lithium metal
redox shuttle
overcharge protection
specific example
non-aqueous electrolytes
provide overcharge
compounds consisting
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