Lg Energy Solution, Ltd.

Lg Chem, Ltd

Guilong Jin

Jung-Pil Lee

Sung-Joong Kang

Ji-Hoon Ryu

Jae-Hyun Lee

Eun-Bee Kim

Ji-Young Kim

Suk-Woo Lee

Ji-Hee Ahn

The present disclosure relates to a lithium secondary battery including a protective layer and a volume-expandable layer, a method for manufacturing the lithium secondary battery, and a system for evaluating the safety of the lithium secondary battery. According to the present disclosure, it is possible to inhibit growth of lithium dendrite primarily by forming a protective layer. It is also possible to inhibit growth of lithium dendrite secondarily by forming a volume-expandable layer. Therefore, it is possible to provide a lithium secondary battery fundamentally prevented from a short-circuit.

Lithium secondary battery and method for manufacturing the same

The present disclosure relates to an electrode assembly for an all-solid-state battery with improved safety, and more particularly, to an electrode assembly of a new structure designed to prevent the damage of a solid electrolyte layer caused by a step formed in a negative electrode layer due to changes in thickness of the negative electrode layer, such as an increase or decrease in thickness at part of the negative electrode layer, during charging/discharging. The electrode assembly is characterized by comprising a protective layer having an opening, interposed between the negative electrode and the solid electrolyte layer.

All-solid-state battery using lithium metal for negative electrode

The present disclosure relates to a solid-liquid hybrid electrolyte membrane including a predetermined amount of liquid electrolyte in a porous structure formed by solid polymer particles, and a method for manufacturing a solid-state battery including the same. According to an embodiment of the present disclosure, it is possible to manufacture a battery without any separate step of injecting an electrolyte. In addition, since the solid-state battery includes a liquid electrolyte, it is possible to ensure improved ion conductivity as compared to the conventional solid electrolyte batteries.

Method for manufacturing all-solid-state battery including solid-liquid hybrid electrolyte membrane, and solid-liquid hybrid electrolyte membrane

Provided is a composite solid electrolyte membrane for an all-solid-state secondary battery, including: a phase transformation layer containing a plasticizer and a lithium salt; a porous polymer sheet layer; and a solid polymer electrolyte layer, wherein the phase transformation layer, the porous polymer sheet layer and the solid polymer electrolyte layer are stacked successively, and the phase transformation layer is disposed in such a manner that it faces a negative electrode when manufacturing an electrode assembly. An all-solid-state secondary battery including the composite solid electrolyte membrane is also provided. The composite solid electrolyte membrane for an all-solid-state secondary battery reduces the interfacial resistance with an electrode, increases ion conductivity, and improves the safety of a battery.

Complex solid electrolyte membrane for all-solid-state battery and all-solid-state battery including same

Provided is provided a lithium metal battery which includes a composite solid electrolyte membrane interposed between a lithium metal negative electrode and a positive electrode, wherein the composite solid electrolyte membrane includes: a phase transformation layer containing a plasticizer and a lithium salt; a porous polymer sheet layer; and a solid polymer electrolyte layer, the phase transformation layer, the porous polymer sheet layer and the solid polymer electrolyte layer stacked successively, and the phase transformation layer is disposed in such a manner that it faces the lithium metal negative electrode. The lithium metal battery shows reduced resistance at the interface with an electrode and increased ion conductivity, has improved safety, and provides improved energy density of an electrode.

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Daejeon, South Korea

Guilong Jin