Lg Energy Solution, Ltd.

Suk Woo Lee

Young Cheul Yoon

Ji Hoon Ryu

Jung Pil Lee

Bum Young Jung

Eun Bee Kim

Han Young Lee

Li-Hsiang Sun

Shu Wang

Su Hyun Yun

Hanyoung Lee

Dong Sik Yoon

Sang Gook Kim

Seong Kyu Lee

Jun Min Kim

Kyoung Min Choi

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

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 method of detecting a lamination defect of an electrode assembly in the initial stage, including: forming an insulating member having a predetermined width and a predetermined height in an overhang region of one end or two ends of one surface of a negative electrode; manufacturing an electrode assembly by sequentially laminating a separator and a positive electrode on one surface of the negative electrode; and determining whether there is a lamination defect in the electrode assembly by measuring a thickness of the electrode assembly. Also provided are an electrode assembly including an insulating member, and a battery cell including the electrode assembly.

Electrode assembly stacking fault detection method, electrode assembly including insulating member, and battery cell including same

A negative electrode for a lithium secondary battery includes: a negative electrode active layer provided on at least one surface of a negative electrode current collector, and including a negative electrode active material; and a coating layer disposed on the negative electrode active layer. The coating layer contains silicon-containing particles, aluminum-containing particles and a dispersant, and a volume resistance of the coating layer is about 1.0×10Ω·cm to 1.0 Ω·cm.

Negative electrode for lithium secondary battery with improved safety or internal short, lithium secondary battery containing the same and lithium secondary battery system therefor

An electrode current collector for a lithium secondary battery includes two or more metal foil layers, and a heat-pressure conversion layer positioned between the two or more metal foil layers, wherein the heat-pressure conversion layer includes a heat-pressure exchange ceramic material, a conductive material, and an adhesive. An electrode including the current collector, and a lithium secondary battery including the electrode are also provided.

Electrode current collector comprising a heat-pressure conversion layer between two or more metal foils, electrode comprising the same, and lithium secondary battery

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Daejeon, South Korea

Suk Woo Lee