The present invention relates to the technical field of secondary lithium-ion batteries, specifically, provided in the present invention are a secondary lithium-ion battery electrolyte solution for reducing battery resistance and a secondary lithium-ion battery. The present invention, in a first aspect, provides the electrolyte solution for the secondary lithium-ion battery, comprising a non-aqueous solvent, a lithium salt and an additive, where the additive comprises a sulfonate compound. The secondary lithium-ion battery electrolyte solution and the secondary lithium-ion battery provided in the present invention have reduced resistance and improved low-temperature performance, high-temperature performance, and cycle life.

Disclosed is a lithium-sulfur secondary battery including a positive electrode, a negative electrode, a separator, and an electrolyte solution, wherein the electrolyte solution contains a lithium salt and a solvent, the solvent includes a nitrile-based solvent, a fluorinated ether-based solvent, and a disulfide-based solvent in a specific volume ratio, and thus for the positive electrode that satisfies the specific conditions of high loading and low porosity, the initial discharging capacity and average discharging voltage of the lithium-sulfur secondary battery containing the electrolyte solution may be improved.

An ionic liquid additive for lithium-ion battery

An ionic liquid for adding to an electrolyte of a lithium-ion battery, the ionic liquid comprises a compound with a dual core structure having the general formula (I):

##STR00001## wherein each of cationic group X.sub.1 and X.sub.2 are heterocyclic aromatic and amine.

The present invention relates to a cathode material for a lithium-air battery and a method of manufacturing a cathode using the same. The cathode material of the present invention includes a solvent component and thus includes an electrolyte in a small amount compared to a conventional cathode material, thereby reducing the weight of a cathode manufactured using the cathode material, ultimately increasing the energy density of a lithium-air battery including the cathode.

Systems and methods drawn to an electrochemical cell comprising a low temperature ionic liquid comprising positive ions and negative ions and a performance enhancing additive added to the low temperature ionic liquid. The additive dissolves in the ionic liquid to form cations, which are coordinated with one or more negative ions forming ion complexes. The electrochemical cell also includes an air electrode configured to absorb and reduce oxygen. The ion complexes improve oxygen reduction thermodynamics and/or kinetics relative to the ionic liquid without the additive.

A solid electrolyte including a compound represented by Formula 1 or 3, the compound having a glass transition temperature of −30° C. or less, and a glass or glass-ceramic structure,

AQX-Ga.sub.1-zM.sub.z1(F.sub.1-kCl.sub.k).sub.3-3zZ.sub.3z1  Formula 1

wherein, in Formula 1, Q is Li or a combination of Li and Na, K, or a combination thereof, M is a trivalent cation, or a combination thereof, X is a halogen other than F, pseudohalogen, OH, or a combination thereof, Z is a monovalent anion, or a combination thereof, 1<A<5, 0≤z≤1, 0≤z1≤1, and 0≤k<1,

AQX-aM.sub.z1Z.sub.3z1-bGa.sub.1-z(F.sub.1-kCl.sub.k).sub.3-3z  Formula 3 wherein, in Formula 3, Q is Li or a combination of Li and Na, K, or a combination thereof; M is a trivalent cation, or a combination thereof, X is a halogen other than F, pseudohalogen, OH, or a combination thereof, Z is a monovalent anion, or a combination thereof, 0<a≤1, 0<b≤1, 0<a+b, a+b=4−A, 1<A<5, 0≤z<1, 0≤z1≤1, and 0≤k<1.

An electrochemical cell for a lithium ion battery has an anode comprising a silicon-based active material, a cathode comprising a cathode active material, and a capacity compensating electrolyte comprising a linear sulfite-based solvent and a lithium imide salt. A molar ratio of the lithium imide salt to the linear sulfite-based solvent is between 1:5 and 1:1.

This disclosure provides systems, methods, and apparatus related to Li-ion batteries. In one aspect an electrolyte structure for use in a battery comprises an electrolyte and an interconnected boron nitride structure disposed in the electrolyte.

A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, a non-aqueous electrolyte solution includes a lithium salt, an organic solvent, and a compound represented by Formula 1 as an additive. A lithium secondary battery including the non-aqueous electrolyte solution has improved high-rate charge and discharge characteristics at high temperature.

A rechargeable lithium-ion battery includes a housing and a battery cell arranged in the housing. The battery cell includes a liquid electrolyte, a composite anode, a composite cathode, and a separator arranged between the composite anode and the composite cathode. The liquid electrolyte includes an ionic liquid, an organic compound, and a lithium salt. The composite anode includes a metal current collector coated with a layer which includes an active material and a binder. The composite cathode includes a metal current collector coated with a layer which includes an active material and a binder. The active material of the composite anode is a lithium titan oxide (LTO). The composite cathode, the composite anode, and the separator, when immersed in the liquid electrolyte, are heat resistant at temperatures of above 150° C. The rechargeable lithium-ion battery is rechargeable in a temperature range of from −30° C. to 150° C.