Samsung Sdi Co., Inc.

Samsung Electronics Co., Ltd.

Jaehyun Cho

Dowon Kim

Byung-Soo Kim

Daedong Park

Daehyun Hong

Imhyuck Bae

Junsik Jeong

Rami Jung

Woojei Choi

Hyukjoong Kim

Kyusung Sim

Jaehong Jo

Keuncheol Lee

Kyeonghun Lee

Hyunwook Jung

Suna Lee

Taejoon Park

Provided is a separator for a secondary battery including a porous substrate and a coating layer disposed on at least one surface of the porous substrate. The coating layer includes a first fluorine-based binder including a vinylidene fluoride (VDF)-derived unit and a hexafluoropropylene (HFP)-derived unit, and a second fluorine-based binder including vinylidene fluoride (VDF)-derived unit and a tetrafluoroethylene (TFE)-derived unit, the hexafluoropropylene (HFP)-derived unit is included in an amount of less than or equal to 5 mol % based on 100 mol % of the first fluorine-based binder, the tetrafluoroethylene (TFE)-derived unit is included in an amount of greater than 10 mol % and less than or equal to 40 mol % based on 100 mol % of the second fluorine-based binder.

Separator for secondary battery and lithium secondary battery comprising same

An electronic device is provided. The electronic device includes a communication module, a memory, and a processor configured to obtain first information for performing a task, identify a first task corresponding to the first information, identify a first device meeting a plurality of conditions corresponding to the first task among a plurality of devices, and request the first device to perform the first task via the communication module. Various other embodiments may be provided.

Electronic device and method for determining device for performing task by electronic device

An electronic device is provided. The electronic device includes a communication circuit, a memory, and at least one processor, wherein, when instructions stored in the memory are executed, the instructions cause the at least one processor to establish communication connections with a plurality of external electronic devices for providing an intelligent speech service, receive at least one piece of information related to a user utterance including a specific word for wake-up from at least some of the plurality of external electronic devices, identify a device to be woken up among the at least some of the plurality of external electronic devices, based on at least one piece of information received during a time interval for identifying the device to be woken up, and change the time interval to a first time interval longer than the time interval, based on a reception time point of at least one piece of second information when the at least one piece of second information is received after the time interval.

Electronic device for identifying electronic device to perform speech recognition and method of operating same

An embodiment provides a separator for a secondary battery, a manufacturing method therefor, and a lithium secondary battery comprising same, the separator including: a porous substrate; and a coating layer including a plurality of ring patterns on at least one surface of the porous substrate, wherein the ring patterns include a plurality of polymer particulates; the ring pattern is spaced apart from each other at regular intervals; a particle diameter of the ring pattern is 10 μm to 200 μm, and a ring of the ring pattern has a width (thickness of the ring) of 0.2 μm to 1.5 μm.

Separator for secondary battery, manufacturing method therefor, and lithium secondary battery comprising same

A separator for a rechargeable battery, a method of preparing a separator, and a rechargeable lithium battery, the separator including a porous substrate; and at least one coating layer on one surface of the porous substrate, wherein the coating layer includes a fluorine-containing binder, a filler, and an additive, the fluorine-containing binder has a concentration gradient in which a concentration thereof in the coating layer increases toward an outer surface of the separator in a thickness direction of the separator, an infrared spectral intensity of a C&#x2014;F group of the fluorine-containing binder is greater than 0.0030 to less than 0.0050, the additive is a hydrocarbon polymer compound that includes a carboxyl group, and a weight average molecular weight of the hydrocarbon polymer compound is about 5,000 g/mol to about 15,000 g/mol.

Separator for rechargeable battery, method of preparing the same and rechargeable lithium battery including the same

A separator for a rechargeable lithium battery includes a porous substrate; and a coating layer on at least one surface of the porous substrate, wherein the coating layer is formed from a coating layer composition including an organosilazane compound, inorganic particles, an initiator, and a solvent, the coating layer includes a curable binder of the organosilazane compound and inorganic particles, the curable binder of the organosilazane compound includes a copolymer including a structural unit represented by Chemical Formula 1, a structural unit represented by Chemical Formula 2, and a structural unit represented by Chemical Formula 3, and a nitrogen (N) atom derived from Chemical Formula 1 is greater than about 0 at % and less than about 5 at % (atomic percent) in the coating layer, and a rechargeable lithium battery. Chemical Formula 1 to Chemical Formula 3 are as defined in the specification.

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

A separator for a rechargeable battery includes a porous substrate, and a coating layer including a plurality of annular patterns on at least one surface of the porous substrate. The annular patterns may include a plurality of polymer microparticles, the annular patterns may have an average particle diameter (D50) of about 50 &#x3bc;m to about 500 &#x3bc;m, and rings of the annular patterns may have a ring width of about 5 &#x3bc;m to about 50 &#x3bc;m.

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Suwon-si, South Korea

Jaehyun Cho