Disclosed is an electrolyte for a lithium-sulfur battery and a lithium-sulfur battery including the same, more particularly an electrolyte for a lithium-sulfur battery including a lithium salt, a non-aqueous organic solvent, and an additive, wherein the additive includes an alkyl vinyl ether compound. The electrolyte for the lithium-sulfur battery improves the efficiency and stability of the negative electrode, thereby improving the capacity and lifetime characteristics of the lithium-sulfur battery.

A lithium ion secondary battery includes: a positive electrode, a negative electrode, a separator located between the positive electrode and the negative electrode, and an electrolytic solution. The negative electrode includes a negative electrode active material which contains silicon or a silicon alloy and a compound containing a first element, the electrolytic solution contains an imide salt which contains the first element and an imide anion, and the first element is any one or more elements selected from the group consisting of K, Na, Mg, Ca, Cs, Al, and Zn.

A lithium ion secondary battery includes: a positive electrode, a negative electrode, a separator located between the positive electrode and the negative electrode, and an electrolytic solution. The negative electrode includes a negative electrode active material which contains silicon oxide and a compound containing a first element. The electrolytic solution contains an imide salt which contains the first element and an imide anion. The first element is any one or more elements selected from the group consisting of K, Na, Mg, Ca, Cs, Al, and Zn.

A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, non-aqueous electrolyte solution includes a lithium salt, an organic solvent, and a compound represented by Formula 1 as a first additive. A lithium secondary battery including the non-aqueous electrolyte has improved flame retardancy.

Disclosed is an electrolyte for a lithium-sulfur battery and a lithium-sulfur battery including the same, more specifically an electrolyte for a lithium-sulfur battery including a lithium salt, a non-aqueous organic solvent, and an additive, wherein the additive includes a sulfide compound. The electrolyte for the lithium-sulfur battery improves the efficiency and stability of the negative electrode, thereby improving the capacity and lifetime characteristics of the lithium-sulfur battery.

An electrolyte solution for a lithium secondary battery includes a lithium salt, an organic solvent, a first additive including a lactone-based compound represented by a specific chemical formula, and a second additive including a fluorine-containing phosphate-based compound, a fluorine-containing carbonate-based compound, a sultone-based compound and a sulfate-based compound. A lithium secondary battery including the electrolyte solution is also provided.

Provided is an electrolyte for a lithium secondary battery that comprises a non-aqueous organic solvent, a lithium salt, and an additive, wherein the additive includes a mixture of a compound represented by Chemical Formula 1, a compound represented by Chemical Formula 2, and a cyclic carbonate-based compound substituted with a halogen.

The details of Chemical Formula 1 and Chemical Formula 2 are as described in the specification.

An electrolyte for a lithium metal secondary battery is provided. The electrolyte comprises a lithium salt and a non-aqueous solvent and provides improved lifespan characteristics and high rate charging performance when applied to a secondary battery including a lithium metal as a negative electrode active material due to fewer side reactions and excellent stability of the electrolyte.

This disclosure relates to improved electrolytes and electrode pastes that include ground state metal nanoparticles formed by laser ablation, improved rechargeable lithium-ion batteries made using the improved electrolytes and/or electrode pastes that include ground state metal nanoparticles formed by laser ablation, and methods for manufacturing rechargeable batteries of improved performance. The metal nanoparticles may comprise or consist of gold. The metal nanoparticles may by spherical-shaped and/or coral-shaped.

A non-aqueous electrolyte secondary battery which uses a non-aqueous electrolyte solution in which a main component of a non-aqueous solvent is a fluorinated solvent, and by which it is possible to suitably prevent a decrease in battery capacity. A method for producing the non-aqueous electrolyte solution disclosed here includes a fluorinated solvent provision step for preparing the fluorinated solvent, a highly polar solvent provision step for preparing a highly polar solvent having a relative dielectric constant of 40 or more, a LiBOB dissolution step for preparing a highly concentrated LiBOB solution by dissolving LiBOB in the highly polar solvent at a concentration that exceeds the saturation concentration in the fluorinated solvent, and a mixing step for mixing the fluorinated solvent with the highly concentrated LiBOB solution.