Lithium secondary battery and non-aqueous electrolytic solution
First Claim
1. A lithium secondary battery comprising:
- a positive electrode comprising a compound metal oxide comprising lithium and cobalt or nickel;
a negative electrode comprising a lithium metal, a lithium alloy or a material capable occluding and releasing lithium; and
a non-aqueous electrolyte solution comprising an electrolyte in a non-aqueous solvent, in which the non-aqueous electrolyte solution contains an organic compound in an amount of 1 to 5 weight %, said organic compound being a combination of a cyclohexylbenzene and tert-pentylbenzene, 1,3-di-tert-pentylbenzene or 1,4-di-tert-pentyl benzene.
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Accused Products
Abstract
The sudden generation of heat being frequently caused in the case of the overcharge of a lithium secondary cell which have a positive electrode comprising a composite metal oxide of lithium and cobalt or a composite metal oxide of lithium and nickel, a negative electrode comprising metallic lithium, a lithium alloy or a material capable of occluding and releasing lithium, and a nonaqueous electrolyte solution comprising a nonaqueous solvent and an electrolyte dissolved therein can be efficiently prevented by the addition, to the nonaqueous electrolyte solution, of an organic compound which, when the lithium secondary cell is overcharged, decomposes into a decomposition product capable of dissolving out the cobalt or nickel contained in the positive electrode and depositing it ion the negative electrode (for example, a tert-alkylbenzene derivative).
3 Citations
7 Claims
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1. A lithium secondary battery comprising:
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a positive electrode comprising a compound metal oxide comprising lithium and cobalt or nickel; a negative electrode comprising a lithium metal, a lithium alloy or a material capable occluding and releasing lithium; and a non-aqueous electrolyte solution comprising an electrolyte in a non-aqueous solvent, in which the non-aqueous electrolyte solution contains an organic compound in an amount of 1 to 5 weight %, said organic compound being a combination of a cyclohexylbenzene and tert-pentylbenzene, 1,3-di-tert-pentylbenzene or 1,4-di-tert-pentyl benzene. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification