Korea Electronics Technology Institute

Goojin Jeong

Jisang Yu

Youngjun Kim

Hansu Kim

Jenam Lee

Woosuk Cho

Sanggil Woo

Kyungsu Kim

Juhye Song

The present disclosure provides a separator, a lithium metal negative electrode, and a lithium metal secondary battery which include a solid superacid coating layer. The solid superacid coating layer suppresses a growth of lithium dendrites in a lithium metal secondary battery employing lithium metal as a negative electrode by improving a mobility and a reaction uniformity of lithium at an interface of the lithium metal negative electrode and an electrolyte solution. In the lithium metal secondary battery, the solid superacid coating layer comprising solid superacid material having a porous structure is formed on at least one of the lithium metal negative electrode and the separator.

Separator, lithium metal negative electrode, and lithium metal secondary battery having solid superacid coating layer

The present disclosure provides a solid electrolyte including an oxysulfide-based compound represented by LiPMSOX (Formula 1) and having excellent stability against moisture, a method of manufacturing the solid electrolyte, and an all-solid-state battery showing superior manufacturing processability. In Formula 1, M is one selected from a group consisting of Zr, Nb, Hf, Ta, Ga, In, Ti, Pb, Bi, Ge, As, Sb, Si, B, Al, and a combination thereof. X is one selected from a group consisting of F, Cl, Br, and I. Also, 6&#x3c;a&#x2264;7, 0&#x3c;b&#x3c;1, 0&#x3c;c&#x3c;1, 4&#x3c;d&#x3c;5, and 0&#x3c;e&#x3c;1.

Solid electrolyte, preparation method thereof, and all-solid-state battery employing the same

The present invention relates to a negative electrode for a lithium secondary battery that can ensure a high energy density, a long-life characteristic, and stability by forming a film on a negative electrode for a lithium secondary battery and thus suppressing dendrites during electrodeposition, a method of manufacturing the same, and a lithium secondary battery using the same. The method of manufacturing the negative electrode for a lithium secondary battery according to the present invention includes preparing a sulfur dioxide-based sodium molten salt and forming a protective layer on the surface of a current collector by immersing the current collector in the sulfur dioxide-based sodium molten salt.

Negative electrode for lithium secondary battery, method of manufacturing the same and lithium secondary battery using the same

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Seongnam-si, South Korea

Goojin Jeong