CPC H01M 10/0568 (2013.01) [H01M 4/382 (2013.01); H01M 10/052 (2013.01); H01M 10/0567 (2013.01); H01M 10/44 (2013.01); H01M 10/0569 (2013.01); H01M 10/4235 (2013.01); H01M 2300/0037 (2013.01)] | 4 Claims |
1. A method for inhibiting the generation of lithium dendrites in a lithium-sulfur battery, comprising:
providing a lithium-sulfur battery comprising a positive electrode; a negative electrode; a separator interposed between the positive electrode and the negative electrode; and an electrolyte solution; and
operating the lithium-sulfur battery,
wherein:
the negative electrode comprises a lithium-based metal, and
the electrolyte solution comprises a lithium salt, a first organic solvent, and a second organic solvent,
wherein the second organic solvent comprises a heterocyclic compound containing at least one double bond, where the heterocyclic compound further comprises an oxygen atom or a sulfur atom; with the proviso that the heterocycle ring does not comprise a nitrogen atom,
wherein the heterocyclic compound comprises at least one selected from the group consisting of pyran, 2-methylpyran, 3-methylpyran, 4-methylpyran, thiophene, 2-methylthiophene, 2-ethylthiophene, 2-propylthiophene, 2-butylthiophene, 2,3-dimethylthiophene, 2,4-dimethylthiophene, and 2,5-dimethylthiophene,
wherein the method further comprises forming a protective film on a surface of the lithium-based metal by a ring-opening polymerization reaction of the heterocyclic compound contained in the electrolyte solution in an initial discharging stage of the lithium-sulfur battery; and
wherein the heterocyclic compound is present in an amount of 23.1 to 38% by weight relative to the total weight of the electrolyte solution for the lithium-sulfur battery.
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