Lg Energy Solution, Ltd.

Korea Advanced Institute of Science and Technology

Hoe-Jin Hah

Jong-Keon Yoon

Kyung-Hwa Woo

Hyun-Woong Yun

Jae-Hyun Lee

Kyoung-Ho Ahn

Sol-Ji Park

Hee-Tak Kim

Jung-Pil Lee

Seok-Koo Kim

Hyea-Eun Han

Hyun-Jun Choi

Hye-Ri Jung

Janis Doelle

Ji-Won Min

Hye-jin Lee

Young-Il Roh

Hyun-Soo Jin

A solid-state battery comprising a positive electrode, a negative electrode, and a solid electrolyte membrane between the positive electrode and the negative electrode, the solid electrolyte membrane including a first solid electrolyte layer and a second solid electrolyte layer, is provided. The first solid electrolyte layer faces the positive electrode and includes a first sulfide-based solid electrolyte, and the second solid electrolyte layer includes a second sulfide-based solid electrolyte having an average particle diameter (D50) larger than an average particle diameter (D50) of the first sulfide-based solid electrolyte.

Solid-state battery

Disclosed is a method for manufacturing a lithium metal secondary battery including a lithium metal electrode as a negative electrode, wherein the lithium metal electrode has a protective layer formed thereon, and the lithium metal secondary battery is discharged before its initial charge during an activation step of the lithium metal secondary battery so that stripping occurs on the surface of the lithium metal electrode.

Method for fabrication of lithium metal secondary battery comprising lithium electrode

A separator for an electrochemical device comprising a porous polymer substrate, and a porous coating layer on at least one surface of the porous polymer substrate. The porous coating layer comprises inorganic particles and an ion conducting polymer. The ion conducting polymer comprises a fluorine-based copolymer comprising fluoroolefin-based segments with anionic functional groups present in side chains or terminals, and an electrochemical device comprising the same. It is possible to provide a separator with high ionic conductivity and an increased peel strength between the porous polymer substrate and the porous coating layer, and an electrochemical device with improved properties.

Separator for electrochemical device and electrochemical device comprising the same

Disclosed is a lithium metal secondary battery including a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a protective layer interposed between the negative electrode and the separator. The protective layer comprises an additive, and wherein the additive comprises a mixture of hexagonal boron nitride (BN) flakes and an ionomer comprising a sulfur (S)-containing anionic group and fluorine (F). The sulfur (S)-containing anionic group is at least one selected from the group consisting of SOand SO.

Lithium metal secondary battery having improved life characteristics

A lithium metal secondary battery including: an electrode assembly including a positive electrode, a lithium metal negative electrode, a separator interposed between the positive electrode and the lithium metal negative electrode, a protective layer interposed between the lithium metal negative electrode and the separator; and a non-aqueous electrolyte injected to the electrode assembly, wherein the protective layer includes a polymer having a sulfur chain group. A battery module including the lithium metal secondary battery is also disclosed.

Lithium metal secondary battery having improved safety and battery module including the same

A lithium metal secondary battery including a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a protective layer interposed between the negative electrode and the separator. The protective layer includes an additive, wherein the additive comprises a mixture of hexagonal boron nitride (BN) flakes with an ionomer having a sulfur (S)-containing anionic group and fluorine (F).

The present disclosure relates to a separator for a lithium ion secondary battery and a battery comprising the separator. The separator supplements the irreversible capacity of a negative electrode. The separator comprises composite particles (A), and the composite particles (A) include a core portion comprising lithium composite metal oxide particles and a shell portion comprising a carbonaceous material with which the core surface is coated at least partially; the composite particles (A) cause lithium deintercalation at 0.1 V to 2.5 V (vs. Li/Li); the battery has a positive electrode potential of 3 V or more (vs. Li/Li); and the battery has a driving voltage of 2.5 V to 4.5 V.

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Daejeon, South Korea

Hoe-Jin Hah