Lithium secondary battery
View Patent ↗There is provided a lithium secondary battery including a positive electrode, a negative electrode, a nonaqueous electrolyte liquid and a separator, that is subjected to a constant-current constant-voltage charge with a stop voltage of more than 4.25V before its use. The lithium secondary battery uses the nonaqueous electrolyte liquid having contained 0.1 to 5 mass % of a phosphonoacetate compound represented by the following general formula (1), and having contained 0.1 to 5 mass % of 1,3-dioxane. In General Formula (1), each of R 1 , R 2 and R 3 is independently hydrocarbon groups having a carbon number of 1 to 12 with or without substituent of a halogen atom, and n is 0 to 6 integers.
1. A lithium secondary battery, comprising a positive electrode, a negative electrode, a nonaqueous electrolyte liquid and a separator, subjected to a constant-current constant-voltage charge is applied with a stop voltage of more than 4.25V before using,
wherein the nonaqueous electrolyte liquid used in the lithium secondary battery contains 0.1 to 5 mass % of a phosphonoacetate compound represented by General Formula (1), and 0.1 to 5 mass % of 1,3-dioxane:
where in General Formula (1), each of R 1 , R 2 and R 3 is independently hydrocarbon groups having a carbon number of 1 to 12 with or without substituent of a halogen atom, and n is 0 to 6 integers.
2. The lithium secondary battery of claim 1 , wherein the negative electrode comprises a negative electrode mixture layer containing a material including constituent elements of Si and O as a negative electrode active material (an atom ratio x of 0 to Si being 0.5≦x≦1.5), formed on one side or both sides of a current collector.
3. The lithium secondary battery of claim 1 , wherein a negative electrode mixture layer of the negative electrode comprises a composite of a material including Si and O as constituent elements, and a first carbon material,
wherein in the composite, a first surface of the material including Si and O as constituent elements is coated with the first carbon material.
4. The lithium secondary battery of claim 3 , wherein a second carbon material is coated on a second surface of the composite, wherein the composite is of the material including Si and O as constituent elements coated with the first carbon material.
5. The lithium secondary battery of claim 1 , wherein the negative electrode comprises a negative electrode mixture layer containing graphite as the negative electrode active material.
6. The lithium secondary battery of claim 2 , wherein the negative electrode mixture layer of the negative electrodes further comprises graphite as the negative electrode active material.
7. The lithium secondary battery of claim 3 , wherein the negative electrode mixture layer of the negative electrodes further comprises graphite as the negative electrode active material.
8. The lithium secondary battery of claim 1 , wherein the nonaqueous electrolyte used in the lithium secondary battery further contains a halogen-substituted cyclic carbonate.
9. The lithium secondary battery of claim 2 , wherein the nonaqueous electrolyte used in the lithium secondary battery further contains a halogen-substituted cyclic carbonate.
10. The lithium secondary battery of claim 3 , wherein the nonaqueous electrolyte used in the lithium secondary battery further contains a halogen-substituted cyclic carbonate.
11. The lithium secondary battery of claim 1 , wherein the nonaqueous electrolyte used in the lithium secondary battery further contains vinylene carbonate.
12. The lithium secondary battery of claim 8 , wherein the nonaqueous electrolyte used in the lithium secondary battery further contains vinylene carbonate.