Abstract: The present invention relates to an electrode having a dual layer structure, a method for manufacturing the same, and a lithium secondary battery comprising the same, the electrode comprising: an electrode current collector; a middle layer formed on at least one side of the electrode current collector; and an electrode active material layer formed on the middle layer, wherein the middle layer comprises a first binder, wherein the electrode active material layer comprises an electrode active material and a second binder, and wherein the first binder and the second binder are the same kind of material but have different crystalline phases.

Abstract: The present disclosure relates to a method for prelithiation, and in particular, to a method for prelithiation that predopes lithium into at least one unit cell uniformly in large amounts. According to an aspect of the present disclosure, there is provided a method for prelithiation including an preparing at least one unit cell, the unit cell comprising a cathode, an anode, and a separator interposed between the cathode and the anode, disposing the prepared at least one unit cell in a reaction tank, and connecting electrodes having the same polarity, adding an electrolyte solution into the reaction tank, disposing a lithium metal plate in the electrolyte solution, and connecting the lithium metal plate to the anode, and doping the anode.

Abstract: Provided are an energy harvesting device, a method for manufacturing the same, and a wireless device including the same. The energy harvesting device may include a support body, a first cantilever connected to the support body, and an electricity generation layer on the first cantilever. The first cantilever may have a thickness that gradually increases in a direction that is away from the support body.

Abstract: Provided is a DC-DC converter including an inductor configured to store input energy, a ground switch configured to provide a ground path of the inductor in response to a first signal, an inductor switch connected in parallel to the inductor so as to maintain the energy stored in the inductor in response to a second signal, output switches configured to output the energy stored in the inductor as multi-output voltages in response to third signals, and a switch controller including a switch controller configured to determine cross regulation between the multi-outputs and generate the first to third signals for decreasing the cross regulation.

Abstract: A flexible piezoelectric energy harvesting device includes a first flexible electrode substrate, a piezoelectric layer disposed on the first flexible electrode substrate, and a second flexible electrode substrate disposed on the piezoelectric layer. The piezoelectric layer may include a plurality of first piezoelectric lines spaced apart from each other in one direction and a plurality of second piezoelectric lines respectively filling spaces between the first piezoelectric lines.

Abstract: A flexible piezoelectric energy harvesting device includes a first flexible electrode substrate, a piezoelectric layer disposed on the first flexible electrode substrate, and a second flexible electrode substrate disposed on the piezoelectric layer. The piezoelectric layer may include a plurality of first piezoelectric lines spaced apart from each other in one direction and a plurality of second piezoelectric lines respectively filling spaces between the first piezoelectric lines.

Abstract: The inventive concept discloses a piezoelectric energy harvesting array and a method of manufacturing the same. The manufacturing method may include forming a plurality of piezoelectric energy harvesting devices; connecting masses to one side of the piezoelectric energy harvesting devices and connecting the other side of the piezoelectric energy harvesting devices facing the masses to a base; and individually tuning a resonant frequency of each of the piezoelectric energy harvesting devices to prevent mismatch of resonant frequency when the masses vibrate.

Abstract: The present invention relates to an electrode having a dual layer structure, a method for manufacturing the same, and a lithium secondary battery comprising the same, the electrode comprising: an electrode current collector; a middle layer formed on at least one side of the electrode current collector; and an electrode active material layer formed on the middle layer, wherein the middle layer comprises a first binder, wherein the electrode active material layer comprises an electrode active material and a second binder, and wherein the first binder and the second binder are the same kind of material but have different crystalline phases.

Abstract: The inventive concept discloses a piezoelectric energy harvesting array and a method of manufacturing the same. The manufacturing method may include forming a plurality of piezoelectric energy harvesting devices; connecting masses to one side of the piezoelectric energy harvesting devices and connecting the other side of the piezoelectric energy harvesting devices facing the masses to a base; and individually tuning a resonant frequency of each of the piezoelectric energy harvesting devices to prevent mismatch of resonant frequency when the masses vibrate.

Abstract: Provided are an energy harvesting device, a method for manufacturing the same, and a wireless device including the same. The energy harvesting device may include a support body, a first cantilever connected to the support body, and an electricity generation layer on the first cantilever. The first cantilever may have a thickness that gradually increases in a direction that is away from the support body.

Abstract: A chip-type electric double layer capacitor includes: a resin case having a housing space provided therein and formed of insulating resin; first and second external terminals inserted into the resin case by insert injection molding, each having a first portion exposed to an outer surface of the resin case for external contact and a second portion exposed to an inner surface of the housing space for internal contact; a sealing portion including a groove portion provided in the resin case along a circumference of at least one of the first and second external terminals and a resin filling the groove portion; and an electric double layer capacitor cell mounted in the housing space and electrically connected to the second portion of the first and second external terminals.

Abstract: Provided is an apparatus for harvesting/storing piezoelectric energy, including: a substrate having a groove at a side thereon; a piezoelectric MEMS cantilever having an end fixed to the substrate and the other end floating above the groove, and configured to convert and store an external vibration into electric energy; and a mass formed at one end of the piezoelectric MEMS cantilever and configured to apply a vibration, and a manufacturing method thereof.

Abstract: The present disclosure relates to an electrode that may minimize an electrical resistance increase caused by a binder polymer or a conductive material used in the electrode and provide a high capacity, a method for manufacturing the same, and an electrochemical device comprising the electrode, and an electrode mix slurry is prepared using a high shearing mixing process for each step such that fine grained conductive material and a binder polymer are uniformly dispersed in an electrode mix, and a high capacity electrode active material is used in the electrode mix, to manufacture a high capacity electrochemical device.

Abstract: Disclosed are an apparatus for harvesting/storing piezoelectric energy, including: a substrate having a groove at a side thereon; a piezoelectric MEMS cantilever having an end fixed to the substrate and the other end floating above the groove, and configured to convert and store an external vibration into electric energy; and a mass formed at one end of the piezoelectric MEMS cantilever and configured to apply a vibration, and a manufacturing method thereof.

Abstract: An apparatus for bonding a semiconductor device or component such as a chip to a substrate comprises a heating device having a die where said die has a heating surface adapted to make thermal contact with an upper surface of said chip when said chip is placed with its lower surface over a substrate with a predetermined number of solder humps sandwiched between said lower surface and said substrate. The die is configured to heat the chip to cause the solder bumps to reflow. Once the reflowed solder bumps are set, the solder joint so thrilled is back-filled with a thermally setting epoxy paste. The heating surface of the die has a central region which contacts the upper surface of the chip and an outer region which extends beyond a peripheral edge of the upper surface of the chip. The die has a recess in its heating surface spanning said peripheral edge. The outer region of the die heating surface lies in a same or a lower plane than the die heating surface central region.

Abstract: A method of manufacturing a chip-type electric double layer capacitor, including: forming a lower case having an opened housing space and first and second external terminals buried therein, the first and second external terminals having first surfaces exposed to the housing space, respectively, and second surfaces exposed to an outer region of the lower case, respectively; mounting an electric double layer capacitor cell in the housing space such that the electric double layer capacitor cell is electrically connected to the first surfaces of the first and second external terminals exposed to the housing space; and mounting an upper cap on the lower case so as to cover the housing space.

Abstract: Energy harvesting devices are provided. The energy harvesting device includes a body, a proof mass spaced apart from the body, a cantilever extending from the body onto the proof mass, a first electrode layer on the cantilever opposite to the body, a first piezoelectric layer on the first electrode layer, a second electrode layer on the first piezoelectric layer, a second piezoelectric layer on the second electrode layer, a pair of third electrode layers on the second piezoelectric layer, and a magnetic layer between the second electrode layer and the second piezoelectric layer. Related methods are also provided.

Abstract: The present disclosure relates to a method for prelithiation, and in particular, to a method for prelithiation that predopes lithium into at least one unit cell uniformly in large amounts. According to an aspect of the present disclosure, there is provided a method for prelithiation including an preparing at least one unit cell, the unit cell comprising a cathode, an anode, and a separator interposed between the cathode and the anode, disposing the prepared at least one unit cell in a reaction tank, and connecting electrodes having the same polarity, adding an electrolyte solution into the reaction tank, disposing a lithium metal plate in the electrolyte solution, and connecting the lithium metal plate to the anode, and doping the anode.

Abstract: A chip-type electric double layer capacitor includes: a resin case having a housing space provided therein and formed of insulating resin; first and second external terminals inserted into the resin case by insert injection molding, each having a first portion exposed to an outer surface of the resin case for external contact and a second portion exposed to an inner surface of the housing space for internal contact; a sealing portion including a groove portion provided in the resin case along a circumference of at least one of the first and second external terminals and a resin filling the groove portion; and an electric double layer capacitor cell mounted in the housing space and electrically connected to the second portion of the first and second external terminals.

Abstract: A flexible piezoelectric energy harvesting device includes a first flexible electrode substrate, a piezoelectric layer disposed on the first flexible electrode substrate, and a second flexible electrode substrate disposed on the piezoelectric layer. The piezoelectric layer may include a plurality of first piezoelectric lines spaced apart from each other in one direction and a plurality of second piezoelectric lines respectively filling spaces between the first piezoelectric lines.