Lg Chem, Ltd

Other

Lg Energy Solution, Ltd.

Eun Bee Kim

Jung Pil Lee

Hye Ri Jung

Ji Young Kim

Ji Hoon Ryu

Suk Woo Lee

Jong Hwa Lee

Sung Ju Cho

Hyeri Jung

Hye Yeong Sim

An all-solid-state secondary battery according to the present invention includes a positive electrode, a negative electrode, and a solid electrolyte formed between the positive electrode and the negative electrode, wherein the negative electrode is formed through a pre-lithiation process in which a powder mixture configured to form the negative electrode contacts lithium metal before battery assembly. Irreversible capacity is removed through the pre-lithiation process, whereby initial efficiency of the battery is improved, and the process is simplified, whereby mass production is possible and cost is reduced.

Method of pre-lithiating negative electrode for all-solid-state secondary batteries and secondary battery using the same

Disclosed is a method of manufacturing a negative electrode for all-solid-state batteries, the method including (a) preparing a powder mixture including a negative electrode active material, a solid electrolyte, and a conductive agent, (b) introducing the powder mixture into a reactor, (c) introducing an electrolytic solution into the reactor, and (d) forming a solid electrolyte interface (SEI) film while rotating the reactor, wherein the inner surface of the reactor is treated with lithium metal.

Method of manufacturing negative electrode for all-solid-state batteries

A method of applying uniform pressure to an all-solid-state battery during activation of the battery and preventing an interface contact surface from being separated as the result of gas generated in the all-solid-state battery is provided. This method increases the lifespan of the battery and an all-solid-state battery manufactured using the same method.

Method of manufacturing all-solid-state battery and all-solid-state battery manufactured using the same

Disclosed is an all-solid-state battery comprising an electrode assembly and a solid electrolyte, wherein the electrode assembly comprises a structure in which plate-shaped electrodes are stacked; and the electrodes include a relatively high heat-generating first electrode and a relatively low heat-generating second electrode, wherein the first electrode is disposed in a center of the electrode assembly, the all-solid-state battery with improved performance by increasing the temperature of the battery without adding additional members.

All-solid-state batteries comprising composite electrode

A device for exercising upper leg portions and hips which includes a frame, an arm pivotably connected to the frame, and a leg pad pivotably connected to the arm and configured to contact the user's leg during use. The frame having an arm strut and a seat strut. The seat strut having a seat location fixing unit defined by a seat location fixing rod and a seat location fixing place. The seat location fixing place is connected to the frame having laterally spaced apart vertical holes therein for insertion of the seat location fixing rod which attaches to an underside of the seat and is configured as a support post between the seat and the holes within the seat location fixing place. The holes are configured for the user to locate said seat location fixing rod at varying distances and locations from the arm strut.

Upper leg and hip exercise method and device to preserve knee and ankle joint while exercising

The present invention includes an arm; a leg pad; a long rectangle shaped seat; a seat angle fixing unit on the seat, for adjusting the angle between the seat and the leg pad (when viewed from above) according to his/her purpose so that the seat can be adjusted to be perpendicular or parallel to the leg pad when viewed from above; and thus the to the user is allowed to move the exercising leg of the user to the back of the user or perform a motion for stretching his/her back straight from a starting pose at which the user lie down on his/her back placed on the seat, wherein the leg pad is placed above the user's pelvis.

An exercise device for performing exercises suitable to strengthen thigh and hip muscles such as a leg press machine, a total hip, a stationary bicycle, or a moving bicycle, and more particularly provides an exercise device for strengthening thigh and hip muscles while protecting the knees and ankle joints by enabling a user to locate a lower end of an arm on the user's thighs in a sitting, prone or supine position and move the user's legs in order to minimize a load or stress added to the knee and ankle joints.

A method of manufacturing a pouch-shaped battery cell includes injecting an electrolytic solution into a pouch-shaped battery case, in which an electrode assembly is received, placing the pouch-shaped battery cell in a jig configured to fix and press the pouch-shaped battery cell and charging and discharging the pouch-shaped battery cell in the state in which pressure is applied to the jig (an activation step).

Method of manufacturing pouch-shaped battery cell including fixing process using jig

A method of manufacturing a pouch-shaped battery cell including a silicon-based negative electrode active material includes injecting an electrolytic solution into a pouch-shaped battery case, in which an electrode assembly is mounted, charging and discharging the pouch-shaped battery cell having the electrolytic solution injected thereinto (a primary formation step), placing the pouch-shaped battery cell in a jig configured to fix and press the pouch-shaped battery cell, and charging and discharging the pouch-shaped battery cell while pressure is applied to the pouch-shaped battery cell by the jig (a jig grading step).

Method of manufacturing pouch-shaped battery cell comprising jig grading

The present invention relates to a method of preparing a lithium secondary battery which may improve productivity and performance of the lithium secondary battery by visually measuring an actual electrolyte solution impregnation time for an electrode active material, setting an estimated impregnation time of the electrolyte solution for a battery based on a measured result, and reflecting the estimated impregnation time in a production process.

Method of preparing lithium secondary battery

The present invention relates to an electrode and a method for manufacturing the electrode, which are for maintaining the uniformity of the thickness of an electrode coating layer in the electrode. In addition, the present invention is characterized by including a preparation step for preparing an electrode foil, an attachment step for attaching an adhesive member onto a portion of the electrode foil, a coated part formation step for coating an active material onto the electrode foil, and an uncoated part formation step for forming an uncoated part on the electrode foil by removing the adhesive member along with the active material coated onto the adhesive member.

Electrode and method for manufacturing same

Disclosed is an electrode assembly with a structure in which a plurality of electrode plates are stacked while a separator is interposed between a positive electrode plate and a negative electrode plate, each of the electrode plates including an electrode tap that externally protrude from one side thereof to form a tap-lead coupler and at least two or more fixing parts that externally protrude from each of electrode plate by a length of 10% to 50% of a length of the electrode tap from the one side and/or the other side, wherein fixing parts with the same polarity, which are positioned in parallel to each other in up and down directions, are bonded to each other to maintain a stack interval between the electrode plates while the electrode plates are stacked.

Electrode assembly including electrode plates with coupled additional taps formed thereon

Provided is an exercise device for performing exercises suitable to strengthen thigh and hip muscles such as a leg press machine, a total hip, a stationary bicycle, or a moving bicycle, and more particularly provides an exercise device for strengthening thigh and hip muscles while protecting the knees and ankle joints by enabling a user to locate a lower end of an arm on the user's thigh in a sitting or lying position and move the user's legs in order to minimize a load or stress added to the knee and ankle joints.

Growing community of inventors

Daejeon, South Korea

Eun Bee Kim