Korea Institute of Science and Technology

Jeong Gon Son

Heesuk Kim

Sang-Soo Lee

Seungjun Chung

Jong Hyuk Park

Phillip Lee

Tae Ann Kim

Min Cheol Park

Young Jin Kim

Jai Kyeong Kim

Jun Chan Choi

Minsung Kim

Wan Ki Bae

Youngpyo Ko

Hoon Yeub Jeong

Jae Hong Kim

Seung Hyun Lee

Min Su Park

Seunghyun Lee

Byeongmoon Lee

Young Mo Lee

Ji-Won You

Hyunjoo Cho

Seongkwon Hwang

Suk Joon Hwang

Inho Jeong

Jinwoo Oh

Hyo Won Kwon

Byung Soo Kang

Keun-Young Shin

Seong Kwon Hwang

Jae Hong Sun

Disclosed herein is a method of manufacturing an auxetic stretchable substrate with a flexible joint structure according to various embodiments of the present invention. The method includes preparing a substrate made of an elastic material, and forming an auxetic to form a plurality of first regions on the substrate, each of the plurality of first regions is a region in which a material constituting the auxetic is not printed, and at least some of the plurality of first regions have different lengths.

Auxetic stretchable substrate with flexible joint structure and method of manufacturing same

Provided is a method of manufacturing a stretchable substrate having improved stretching deformation uniformity through control of a spatial crosslinking degree according to various embodiments of the present disclosure to implement the above object. The method includes forming a substrate part of an elastic material, forming an auxetic including a plurality of unit structures on the substrate part, and forming a fixing part on the substrate part on which the auxetic is formed, wherein the fixing part has a different crosslinking density in each region.

Stretchable substrate having improved stretching deformation uniformity through control of spatial crosslinking degree and method of manufacturing the same

Provided is a method of manufacturing a stretchable substrate according to various embodiments of the present disclosure in order to implement the above-described objects. The method may include forming an auxetic including a plurality of unit structures and forming one or more microstructures.

Stretchable substrate and method of manufacturing the same

Provided is a method of manufacturing a stretchable substrate having improved thickness deformation uniformity through control of a spatial crosslinking degree according to various embodiments of the present disclosure to implement the above object. The method includes forming a substrate part of an elastic material, forming an auxetic including a plurality of unit structures on the substrate part, and forming a fixing part on the substrate part on which the auxetic is formed, wherein the fixing part has a different vertical crosslinking density at each position.

Stretchable substrate having improved thickness deformation uniformity through control of spatial crosslinking degree and method of manufacturing the same

The present disclosure relates to a stretchable electrode, a method for preparing the same and a stretchable battery including the stretchable electrode. The stretchable electrode of the present disclosure, which is prepared by crosslinking a hydroxyl-functionalized fluorine-based polymer binder physically using a ketone-based solvent or chemically with a crosslinking agent, has superior stretchability, has improved interfacial adhesivity to an active material through Fenton's oxidation, exhibits improved stability under various mechanical deformations of the electrode such as stretching, etc. and can uniformly maintain the electrical conductivity, battery capacity and charge-discharge performance of the electrode. In addition, the stretchable battery of the present disclosure, which includes the stretchable electrode, a stretchable current collector, a stretchable separator and a stretchable encapsulant, has improved stretchability and superior battery stability under various deformations due to high degree of freedom of structures and materials. In addition, the stretchable battery of the present disclosure can be prepared as a fiber battery by printing an electrode and a current collector sequentially on both sides of a stretchable fabric, which can be worn, e.g., around sleeves due to superior stretchability and high structural degree of freedom and retains high battery performance and mechanical stability even under mechanical deformation. Therefore, it can be applied to a mobile display for a health monitoring system or a smartwatch.

Stretchable electrode, manufacturing method thereof, and stretchable battery comprising stretchable electrode

Disclosed is a method of manufacturing a transparent stretchable substrate according to various embodiments of the present disclosure. The method may include generating a substrate part formed of an elastic material, generating an auxetic including a plurality of unit structures on the substrate part, and generating a fixing part on the substrate part on which the auxetic is generated.

Transparent stretchable substrate and manufacturing method thereof

A conductive polymer composite for adhesion to a flexible substrate contains a polymer adhesive containing a curable polymer and a curing agent; and a conductive filler containing a metal and a carbonaceous material dispersed in the polymer adhesive. The conductive polymer composite is suitable for application to not only the human body but also other objects having irregular surface. In addition, due to enhanced adhesive strength of the conductive polymer composite to the flexible substrate, the reduction in conductivity or conductivity breakdown caused by external stress can be prevented and flexibility and stretchability can be improved.

Conductive polymer composite for adhesion to flexible substrate and method for preparing same

Disclosed is a method of manufacturing a stretchable substrate according to various embodiments of the present disclosure for realizing the above-described objectives. The method may include generating an auxetic including a plurality of unit structures and adhering one or more elastic sheets to one surface of the auxetic.

Mechanical-metamaterial-based stretchable substrate with negative poisson's ratio and manufacturing method thereof

A highly-dielectric, elastic structure includes an elastic body that is highly-dielectric and includes a polymer matrix that including 1000 pbw of a polydimethylsiloxane (PDMS) base and 100 pbw of a PDMS curing agent, and has a tensile strength of 0.1 to 10 MPa; and 22.4 pbw of carbon black that is surface-treated with octadecyltrimethoxysilane (ODTMS) in an amount of at least 0.707 mmol per 22.4 pbw of the carbon black, and that is dispersed in the polymer matrix and cured; and an adhesive electrode that is stretchable, that is disposed on the elastic body, and that includes a polymer adhesive including a 500 pbw of a thermosetting silicone-based polymer adhesive including a curable polymer and a curing agent; and a conductive filler comprising 500 pbw of silver particles and 4000 pbw of a carbonaceous material that is a multi-walled carbon nanotube that are dispersed in the polymer adhesive and cured.

Highly-dielectric, elastic structure and a touch sensor including the same

Disclosed is a thermoelectric device in which a separate interlayer is inserted between a thermoelectric leg and an electrode to reduce the contact resistance between the thermoelectric leg and the electrode, so that the interlayer serves as a tunneling path between the thermoelectric leg and the electrode, facilitating the charge movements between the two materials. The thermoelectric device according to an embodiment includes a substrate; at least one thermoelectric leg positioned on the substrate; an interlayer positioned on each thermoelectric leg of the at least one thermoelectric leg and including a plurality of interlayer materials that are chemically bonded with a respective thermoelectric leg; and an electrode positioned on each interlayer and electrically connected to the respective thermoelectric leg, wherein the plurality of interlayer materials of each respective interlayer is arranged in a shape of a brush.

Thermoelectric device having a separate interlayer disposed between a thermoelectric leg and an electrode to reduce the contact resistance therebetween

The present disclosure relates to a generalized method for producing a vertically oriented block copolymer film, a block copolymer film with controlled orientation obtained thereby, and a method for producing a self-assembled pattern. According to the present disclosure, it is possible to form a crosslinked layer, which is mechanically stable and undergoes no chemical change, by subjecting the block copolymer surface to plasma treatment using a filter. It is also possible to obtain a vertically oriented block copolymer film by annealing the block copolymer film having such a crosslinked layer. The method for producing a vertically oriented block copolymer film according to the present disclosure is advantageous in that it can be applied for general purpose regardless of the chemical structure, type and morphology of a block copolymer, and the method can be applied generally to the conventional directed self assembly process.

Generalized method for producing vertically oriented block copolymer film, block copolymer film produced thereby and method for producing self-assembled pattern

A resistance-switchable material containing: an insulating support; and a complementary resistance switchable filler dispersed in the insulating support, wherein the complementary resistance switchable filler has a spherical core-shell structure containing: a spherical conductive core containing a conductive material; and an insulating shell formed on the surface of the core and containing an insulating material. The resistance-switchable material is capable of exhibiting complementary resistive switching characteristics with improved reliability and stability as symmetrical uniform filament current paths are formed in respective resistive layers adjacent to two electrodes with the conductive core of the complementary resistance-switchable filler at the center due to the electric field control effect by the spherical complementary resistance-switchable filler.

Spherical complementary resistance switchable filler and nonvolatile complementary resistance switchable memory comprising the same

A wavy metal nanowire network thin film, a stretchable transparent electrode including the metal nanowire network thin film, and a method for forming the metal nanowire network thin film. More specifically, it relates to a wavy nanowire network structure based on straight metal nanowires, a method for producing the nanowire network structure, and a flexible electrode including the wavy metal nanowire structure. The flexible electrode of the present invention is transparent and stretchable and exhibits stable performance even when subjected to various deformations.

Wavy metal nanowire network thin film, stretchable transparent electrode including the metal nanowire network thin film and method for forming the metal nanowire network thin film

A polyamide/hybrid carbon filler composite is disclosed. The composite includes a polyamide as a matrix and a hybrid carbon filler dispersed in and bonded to the polyamide matrix. The hybrid carbon filler is composed of a nano carbon and a carbon fiber. Also disclosed is a method for preparing the polyamide/hybrid carbon filler. The method includes simultaneously subjecting a mixture of a polyamide and a hybrid carbon filler to mechanofusion and plasma treatments.

Polymer-hybrid carbon filler composite and method for preparing the same

A resistance-switchable material containing: an insulating support; and a complementary resistance switchable filler dispersed in the insulating support, wherein the complementary resistance switchable filler has a core-shell structure containing: a wire-type conductive core containing a conductive material; and an insulating shell formed on the surface of the core and containing an insulating material. Because a first resistive layer, a conductive layer and a second resistive layer are formed as one layer and bipolar conductive filaments are formed on the substantially different resistive layers, the memory can exhibit complementary resistive switching characteristics. In addition, the complementary resistance switchable memory of the present disclosure can be prepared through a simplified process at low cost by introducing a simple process of coating a paste in which a complementary resistance switchable filler and a supporting material are mixed.

Growing community of inventors

Seoul, South Korea

Jeong Gon Son