Lg Chem, Ltd

Lg Energy Solution, Ltd.

Intae Park

Doo Kyung Yang

Changhoon Lee

Changhun Park

Charles Kiseok Song

Sungwon Hong

Youhwa Ohk

Minchul Jang

Byoungkuk Son

Seong Ho Lee

Junghun Choi

Myeongjun Song

Kiyoung Kwon

Kihyun Kim

Soohyun Kim

Eunkyung Cho

Taek Gyoung Kim

Minsu Kim

Dongseok Shin

Dongwook Koh

Youngcheol Choi

Myeongseong Kim

Sun Mi Jin

Jeehyun Ahn

Hyunah Cho

Seongeun Park

Yoonsoo Jung

Ilto Kim

A lithium-sulfur secondary battery comprising a positive electrode, a negative electrode, a separator, and an electrolyte solution are provided. The positive electrode has an SC factor value of 0.45 or more. The electrolyte solution includes a solvent and a lithium salt, and the solvent includes a first solvent having a DVfactor value of 1.7 or less, and a second solvent which is a fluorinated ether-based solvent.

Lithium-sulfur secondary battery

Disclosed is a lithium secondary battery, and in particular, to a lithium secondary battery capable of obtaining higher energy density and longer lifetime compared to existing lithium secondary batteries by specifying conditions of a positive electrode and an electrolyte liquid and additionally surface modifying a carbon material through heat treatment or including a separator including a molybdenum disulfide coating layer.

Lithium secondary battery

A lithium secondary battery, specifically, a lithium secondary battery. By specifically adjusting the porosity (%) and the mass of sulfur per unit area (mg/cm) of a positive electrode active material layer including a sulfur-carbon composite, the initial battery discharge capacity is improved, and thus a high energy density can be achieved.

A lithium-sulfur secondary battery is disclosed, and in particular, a lithium-sulfur secondary battery in which a positive electrode includes a sulfur-carbon composite including a microporous carbon material and sulfur, or a conductive additive including a carbon material having high specific surface area. By specifying conditions of the positive electrode and an electrolyte liquid, energy density may be enhanced compared to existing lithium-sulfur secondary batteries.

A method for pre-treating lithium metal for a lithium secondary battery including stripping a surface oxide film formed on a surface of the lithium metal by discharging the battery, and a plating lithium metal on the surface of the lithium metal, from which the surface oxide film has been stripped, by charging the battery.

Method for preprocessing lithium metal for lithium secondary battery

A method for producing a lithium-sulfur battery with an improved lifetime. This method includes an activation step of forming a positive electrode active material-derived compound from a compound including elemental sulfur by charging and discharging the lithium-sulfur battery, where the battery includes the compound including elemental sulfur and an electrolyte liquid. Additionally, the positive electrode active material-derived compound has a solubility of 1% by weight or greater in the electrolyte liquid. The lithium-sulfur battery may be charged and discharged in a range of greater than 2.0 V and less than 2.4 V in the activation step. Further, the lithium-sulfur battery may be charged and discharged 3 times to 10 times in the activation step. This method avoids a complicated application process of and active material in preparing a lithium-sulfur battery.

Method for improving lifetime of lithium-sulfur battery

An electrolyte for a lithium metal battery and a lithium metal battery including the same, more specifically an electrolyte for a lithium metal battery including a lithium salt, an organic solvent and an additive, wherein the additive includes a functional group that binds to lithium metal at one end thereof and a fluorinated hydrocarbon group at the other end. The electrolyte for the lithium metal battery includes an additive including particular functional groups to improve the stability of the lithium metal and suppress the side reaction at the surface, thereby enabling the lithium metal battery to have high capacity, high stability, and long life.

Electrolyte for lithium metal battery and lithium metal battery comprising same

A method for improving a lifetime property and a charging rate of a lithium-sulfur secondary battery capable of both improving a lifetime property and a charging rate of the secondary battery by inducing a homogeneous reaction of the lithium-sulfur secondary battery by applying a charging rate differently for each section in a charging process of the lithium-sulfur secondary battery.

Method for improving life properties and charging speed of lithium-sulfur secondary battery

A lithium-sulfur battery in which a passivation film having a semi-interpenetrating polymer network (semi-IPN) structure is formed on an electrode to improve lifespan characteristics of high-loading lithium-sulfur batteries.

Lithium-sulfur battery

The present invention relates to a ternary liquid electrolyte for a lithium-sulfur battery and a lithium-sulfur battery including the same. The liquid electrolyte for a lithium-sulfur battery according to the present invention exhibits an excellent sulfur utilization rate when used in a lithium-sulfur battery, and exhibits excellent stability. Accordingly, the liquid electrolyte for a lithium-sulfur battery according to the present invention is capable of enhancing a life time property while securing a capacity property of a lithium-sulfur battery.

Electrolyte for lithium-sulfur battery and lithium-sulfur battery comprising same

Electrolyte solution for lithium-sulfur battery and lithium-sulfur battery comprising same

A lithium-sulfur battery is provided. More specifically, a lithium-sulfur battery including a polymer non-woven fabric containing a liquid electrolyte between a positive electrode including sulfur and a separator is provided. By including a polymer non-woven fabric containing a liquid electrolyte between a positive electrode and a separator, the lithium-sulfur battery according to the present invention is capable of continuously supplying the liquid electrolyte to the positive electrode, and suppressing polysulfide elution. Accordingly, the lithium-sulfur battery has a reduced discharge overvoltage, and exhibits excellent discharge capacity and life time properties.

Lithium-sulfur battery including polymer non-woven fabric between positive electrode and separator

The present invention relates to a liquid electrolyte for a lithium-sulfur battery and a lithium-sulfur battery including the same. The liquid electrolyte for a lithium-sulfur battery according to the present invention exhibits excellent stability, and may improve a swelling phenomenon by suppressing gas generation during lithium-sulfur battery operation.

Electrolyte for lithium-sulfur battery, and lithium-sulfur battery comprising same

The present specification relates to a lithium-sulfur battery including an anode, a cathode, and an electrolyte provided between the anode and the cathode, and a battery module including the same.

Lithium-sulfur battery and battery module including same

The present application relates to a lithium electrode and a lithium battery including the same.

Growing community of inventors

Daejeon, South Korea

Intae Park