Overcharge protection of secondary, non-aqueous batteries

Details Overcharge protection of secondary, non-aqueous batteries Overcharge protection of secondary, non-aqueous batteries

H - Electricity

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H01M 10/40 (2006.01) H01M 4/36 (2006.01) H01M 10/08 (2006.01) H01M 10/42 (2006.01) H01M 6/50 (2006.01) H01M 10/44 (2006.01)

Patent

CA 1306003

13 ABSTRACT OF THE DISCLOSURE The invention features the use of redox re- agents, dissolved in non-aqueous electrolytes, to provide overcharge protection for cells having alkali metal negative electrodes (anodes). In particular, the inven- tion features the use of organometallic compounds, known as metallocenes, as redox shuttle reagents ,to provide overcharqe protection. Specific examples of this invention are bis(cyclopentadienyl)iron, known as ferrocene; bis(n-butyl-cyclopentadienyl)iron, known as butylferrocene; bis(cyclopentadienyl)nickel, known as nickelocene; and bis(cyclopentadienyl)cobalt, known as cobaltocene. An example of a rechargeable battery in which thesa redox reagents are used has an Li negative electrode and a TiS2 positive electrode.

584423

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