Samsung Sdi Co., Inc.

Samsung Electronics Co., Ltd.

Hyundai Motor Company

Kia Corporation

Hironari Takase

Hokuto Yokotsuji

Geun-Bae Kim

Yong Sub Yoon

Satoshi Fujiki

Hideaki Maeda

Masaki Koike

Hajime Tsuchiya

Yuki Sasaki

A system and method of estimating the state of health of an all-solid-state battery are provided to detect the amount of hydrogen sulfide that is generated in all-solid-state battery cells and using the amount as a factor for estimating the state of health of the battery. The method of estimating a state of health (SOH) of an all-solid-state battery includes detecting whether hydrogen sulfide is generated in each cell of the all-solid-state battery, and estimating the state of health of the all-solid-state battery corresponding to an amount or an increase rate of generated hydrogen sulfide based on data prepared in advance.

System and method for estimating state of health of all-solid-state battery

A rechargeable lithium ion battery including a negative active material, the negative active material including a carbon-based active material, and an electrolyte solution that includes a S&#x2550;O-containing compound, the S&#x2550;O-containing compound having a structure that is selected according to a G band/D band ratio of the carbon-based active material.

Rechargeable lithium ion battery, and manufacturing method for rechargeable lithium ion battery

A rechargeable lithium battery includes: a positive electrode including a positive active material; and an electrolyte solution including a solvent and an additive, wherein the positive active material includes a lithium-containing transition metal oxide, the solvent includes a hydrofluoroether, and the additive includes a first additive represented by Chemical Formula 1 and at least one selected from a second additive represented by Chemical Formula 2, a third additive represented by Chemical Formula 3, and a fourth additive represented by Chemical Formula 4. 

Rechargeable lithium battery

A rechargeable lithium battery includes a negative electrode including a negative active material including a silicon-based material and a carbon-based material; and an electrolyte solution, wherein the negative electrode further includes greater than or equal to about 0.01 parts by weight and less than or equal to about 1 part by weight of a compound represented by Chemical Formula 1, based on 100 parts by weight of the negative active material, and at least one, selected from the electrolyte solution and the negative electrode, includes greater than or equal to about 0.1 wt % and less than or equal to about 2 wt % of lithium fluorosulfonate and/or lithium bis(fluorosulfonyl)imide, based on the total weight of the electrolyte solution: 

A positive active material layer for a rechargeable lithium battery including a positive active material and a protection film-forming material is disclosed. A separator for a rechargeable lithium battery including a substrate and a porous layer positioned at least one side of the substrate and including a protection film-forming material is also disclosed. A rechargeable lithium battery can include at least one of the positive active material layer and the separator.

Positive active material layer for rechargeable lithium battery, separator for rechargeable lithium battery, and rechargeable lithium battery including at least one of same

The rechargeable lithium ion battery includes a positive active material including a lithium compound, a non-aqueous electrolyte including at least one disulfonate ester selected from a cyclic disulfonate ester represented by Chemical Formula 1 and a linear disulfonate ester represented by Chemical Formula 2, and includes at least one carbonate having an unsaturated bond selected from vinylene carbonate and vinylethylene carbonate. The non-aqueous electrolyte may include about 0.05 wt % to about 0.5 wt % of the disulfonate ester based on the total weight of the non-aqueous electrolyte, and about 0.2 wt % to about 1.5 wt % of the carbonate having the unsaturated bond based on the total weight of the non-aqueous electrolyte.

Rechargeable lithium ion battery

Positive active material layer for rechargeable lithium battery, separator for  rechargeable lithium battery, and rechargeable lithium battery including at least one of same

In an aspect, an electrolyte that includes a lithium salt, an organic solvent, and an additive is disclosed.

Electrolyte for rechargeable lithium battery and rechargeable lithium battery including the same

A positive electrode for an all-solid battery including a positive active material; a conductive material; and a binder, wherein the positive electrode further includes a cyano compound represented by Formula 1:M[A(CN)]&#x2003;&#x2003;Formula 1wherein in Formula 1, A is at least one selected from boron, gallium, aluminum, fluorine, phosphorus, and carbon, M is at least one alkali metal, and x is an integer of 1 to 4.

Cathode and all-solid battery including the same

A separator for non-aqueous rechargeable lithium batteries and a non-aqueous rechargeable lithium battery including the separator are provided. The separator includes a separator body and a composite including an organic compound and an inorganic compound supporting the separator body, where the organic compound has a higher melting point than that of the material composing the separator body, and the inorganic compound includes an element selected from the group consisting of 1A, 2A, 3A, 4A, 3B, and 5B elements from the periodic table, and combinations thereof, and at least one moiety selected from the group consisting of oxides, hydroxides, carbonates, phosphates, sulfates, nitrates, alkoxides, and combinations thereof.

Growing community of inventors

Yokohama, Japan

Hironari Takase