Abstract: The present disclosure relates to an all-solid lithium secondary battery and a preparation method thereof, wherein the all-solid lithium secondary battery includes a positive electrode active material layer, a negative electrode active material layer, and a solid electrolyte layer disposed between the positive electrode active material layer and the negative electrode active material layer, wherein the negative electrode active material layer includes a carbon structure and silver nanoparticles, the carbon structure includes a structure in which a plurality of graphene sheets are connected to each other, and the plurality of graphene sheets include two or more graphene sheets having different plane directions.

Abstract: The present disclosure relates to an all-solid lithium secondary battery and a preparation method thereof, wherein the all-solid lithium secondary battery includes a positive electrode active material layer, a negative electrode active material layer, and a solid electrolyte layer disposed between the positive electrode active material layer and the negative electrode active material layer, wherein the negative electrode active material layer includes a carbon structure and silver nanoparticles, the carbon structure includes at least one hollow-type particle, and the hollow-type particle includes a hollow and a carbonaceous shell surrounding the hollow.

Abstract: An electrolyte for a lithium secondary battery including a wettability-improving additive having a trifluoromethylsulfonyl group. The electrolyte has reduced surface tension to improve the wettability of an electrode assembly with the electrolyte. Therefore, it is possible to ensure high electrolyte wettability even when the electrolyte includes a high-boiling point solvent or a high concentration of lithium salt.

Abstract: An all-solid lithium secondary battery and a preparation method thereof are proved. The all-solid lithium secondary battery comprises a positive electrode active material layer, a negative electrode active material layer including graphitized platelet carbon nanofibers and silver nanoparticles, and a solid electrolyte layer between the positive electrode active material layer and the negative electrode active material layer.

Abstract: A non-aqueous electrolyte for a lithium secondary battery and a lithium secondary battery including the same are provided. The non-aqueous electrolyte includes a compound represented by the following formula, R1-O—CH2—R2, in an amount of 2 wt % to 50 wt % based on a total weight of the non-aqueous electrolyte, an organic solvent containing a nitrile-based solvent in an amount of 90 vol % to 100 vol %, and a lithium salt.

Abstract: The present invention relates to a device and method which can measure, in real time, the resistance, depending on pressure changes, of a separator that is immersed in an electrolyte, and enables analysis of the resistance properties of a separator reflecting the real operating state of a secondary battery.

Abstract: A haptic device according to one embodiment can comprise: a database unit for storing acoustic information or receiving the acoustic information from an external device; a control unit for converting the acoustic information into an electrical signal according to a predetermined pattern; a driving unit for generating a motion signal on the basis of the electrical signal; and a transfer unit for transferring a patterned tactile signal to a user by means of the motion signal.

Abstract: The present disclosure relates to a solid state battery comprising silicon (Si) as a negative electrode active material. The solid state battery according to the present disclosure does not comprise a conductive material and a solid electrolyte in the negative electrode and comprise a minimum amount of binder. According to this structural feature, the battery according to the present disclosure has good electrical and chemical properties including heat resistant stability, energy density, life characteristics and Coulombic efficiency.

Abstract: The present invention relates to an apparatus for pressing a secondary battery. The apparatus for pressing a secondary battery comprises a disposing member on which the secondary battery comprising an electrode assembly and a pouch is disposed, and a pressing member configured to press the secondary battery disposed on the disposing member, wherein the pressing member comprises an accommodation part pressing jig configured to press an accommodation part of the pouch, in which the electrode assembly is accommodated, in the pouch of the secondary battery disposed on the disposing member, and a sealing part pressing jig configured to press a sealing part formed along an edge surface of the accommodation part in the pouch of the secondary battery disposed on the disposing member, wherein the sealing part pressing jig is coupled to a surface of the accommodation part pressing jig corresponding to the sealing part to press the sealing part through pressing force transmitted from the accommodation part pressing jig.

Abstract: A solid state battery is described, which has a negative electrode having a negative electrode active material layer including silicon (Si) as a negative electrode active material. The Si may be present as particles, e.g., microparticles, having an average particle size (D50) of 0.1 ?m to 10 ?m. The negative electrode active material layer may include the silicon (Si) in an amount of 75 wt % or more, 95 wt % or more, 99 wt % or more, or 99.9 wt % or more, based on 100 wt % of the negative electrode active material layer. The negative electrode active material layer can be free or substantially free of conductive material, carbon, solid state electrolyte, and/or binder. Preferably, after charge/discharge cycles, the negative electrode active material layer forms densified and interconnected large particles of Li—Si alloy, e.g., the Li—Si alloy may have at least one columnar structure and at least one void.

Abstract: The present invention relates to a device and method which can measure, in real time, the resistance, depending on pressure changes, of a separator that is immersed in an electrolyte, and enables analysis of the resistance properties of a separator reflecting the real operating state of a secondary battery.

Abstract: Disclosed is a lithium metal secondary battery including: an electrode assembly including a negative electrode, a positive electrode and a separator between the negative electrode and the positive electrode; a non-aqueous electrolyte with which the electrode assembly is impregnated; and a battery casing in which the electrode assembly and the non-aqueous electrolyte are received, wherein the negative electrode includes a negative electrode current collector and a lithium metal layer formed on at least one surface of the negative electrode current collector, and the charge/discharge condition of the lithium metal secondary battery is controlled in such a manner that the battery is charged under a pressurized state with a constant pressure of 3-300 psi and discharged under a pressurized state with a constant pressure lower than the pressure applied to the pressurized state during charge.

Abstract: A haptic device according to one embodiment can comprise: a database unit for storing acoustic information or receiving the acoustic information from an external device; a control unit for converting the acoustic information into an electrical signal according to a predetermined pattern; a driving unit for generating a motion signal on the basis of the electrical signal; and a transfer unit for transferring a patterned tactile signal to a user by means of the motion signal.

Abstract: A haptic device according to one embodiment can comprise: a database unit for storing acoustic information or receiving the acoustic information from an external device; a control unit for converting the acoustic information into an electrical signal according to a predetermined pattern; a driving unit for generating a motion signal on the basis of the electrical signal; and a transfer unit for transferring a patterned tactile signal to a user by means of the motion signal.

Abstract: A haptic device according to one embodiment can comprise: a database unit for storing acoustic information or receiving the acoustic information from an external device; a control unit for converting the acoustic information into an electrical signal according to a predetermined pattern; a driving unit for generating a motion signal on the basis of the electrical signal; and a transfer unit for transferring a patterned tactile signal to a user by means of the motion signal.

Abstract: A haptic device according to one embodiment can comprise: a database unit for storing acoustic information or receiving the acoustic information from an external device; a control unit for converting the acoustic information into an electrical signal according to a predetermined pattern; a driving unit for generating a motion signal on the basis of the electrical signal; and a transfer unit for transferring a patterned tactile signal to a user by means of the motion signal.

Abstract: A haptic device according to one embodiment can comprise: a database unit for storing acoustic information or receiving the acoustic information from an external device; a control unit for converting the acoustic information into an electrical signal according to a predetermined pattern; a driving unit for generating a motion signal on the basis of the electrical signal; and a transfer unit for transferring a patterned tactile signal to a user by means of the motion signal.

Abstract: A haptic device according to one embodiment can comprise: a database unit for storing acoustic information or receiving the acoustic information from an external device; a control unit for converting the acoustic information into an electrical signal according to a predetermined pattern; a driving unit for generating a motion signal on the basis of the electrical signal; and a transfer unit for transferring a patterned tactile signal to a user by means of the motion signal.

Abstract: A haptic device according to one embodiment can comprise: a database unit for storing acoustic information or receiving the acoustic information from an external device; a control unit for converting the acoustic information into an electrical signal according to a predetermined pattern; a driving unit for generating a motion signal on the basis of the electrical signal; and a transfer unit for transferring a patterned tactile signal to a user by means of the motion signal.

Abstract: A gas injector includes: a plate including at least one first injection hole; and at least one nozzle module combined with the plate, the at least one nozzle module including at least one second injection hole connected to the at least one first injection hole.