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US 9,040,203 B2Granted
Lithium battery
AssigneeSamsung SDI Co., Ltd.
InventorsMyung-Hoon Kim, Man-Seok Han, Seung-Wan Kim, Jung-Yeon Won, Ha-Na Yoo
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Abstract
A lithium battery including: a positive electrode including an overlithiated lithium transition metal oxide having a layered structure; a negative electrode including a silicon-based negative active material; and an electrolyte between the positive electrode and the negative electrode, the electrolyte including an electrolytic solution including a fluorinated ether solvent in an amount of 3 vol % or more based on the total volume of the electrolytic solution.
Claims19
A lithium battery comprising:
- a positive electrode comprising an overlithiated transition metal oxide having a layered structure;
- a negative electrode comprising a silicon-based negative active material;
- and
- an electrolyte between the positive electrode and the negative electrode, the electrolyte comprising an electrolytic solution comprising a fluorinated ether solvent in an amount of 3 vol % or more based on the total volume of the electrolytic solution,
- wherein the overlithiated transition metal oxide comprises a compound represented by Formula 1 below:
- xLi2MO3-(1-x)LiM′O2, <Formula 1>
- wherein 0<x<1, M is at least one metal selected from Period 4 transition metals and Period 5 transition metals having a mean oxidation number of +4, and M′ is at least one metal selected from Period 4 transition metals and Period 5 transition metals having a mean oxidation number of +3.
4 more elements
Dependencies are inferred from the claim text.