Samsung Sdi Co., Inc.

Sejong University

Sangil Han

Jinkyu Kim

Byeonggyu Cho

Jeonghye Lee

ILseok Kim

Kyulin Lee

Jungmin Han

Minsang Song

Jeongdoo Yi

Younggyoon Ryu

Yunchae Jung

Dongrak Sohn

Jinhee Lee

Pilsang Yun

Suk-gi Hong

Jinhoon Yang

Keesun Sohn

Sunggeun Shim

Minjin Song

A composite cathode active material for an all-solid-state battery including a sulfide solid electrolyte, a preparation method thereof, a cathode layer for an all-solid-state battery, and an all-solid-state battery including the cathode layer, the composite cathode active material including a secondary particle including a plurality of primary particles; and a buffer layer on a surface of the secondary particle, wherein the secondary particle includes a nickel lithium transition metal oxide represented by Formula 1 (LiNiMO), the buffer layer includes a first buffer layer adjacent to a surface of the secondary particle and including an oxide represented by Formula 2 (LiAO); and a second buffer layer including an oxide represented by Formula 3 (LiEO).

Composite cathode active material for all-solid-state battery, preparation method thereof, cathode layer for all-solid-state battery, and all-solid-state battery including the cathode layer

A positive active material for an all-solid secondary battery, an all-solid secondary battery including the same, and a method of manufacturing the positive active material for an all-solid secondary battery, the positive active material including a secondary particle including a plurality of primary particles; and a buffer layer on a surface of the secondary particle; wherein the secondary particle includes a nickel lithium transition metal oxide represented by Formula 1, the buffer layer includes a copper compound represented by Formula 2,LiNiMOA  <Formula 1>LiCuX.  <Formula 2>

Positive active material for all solid secondary battery, and all solid secondary battery including the same

A sulfide solid electrolyte for an all-solid secondary battery includes lithium, phosphorus, sulfur, oxygen, and halogen atoms, wherein the sulfide solid electrolyte has an argyrodite-type crystal structure, the halogen atoms includes chlorine and at least two of bromine, iodine, and fluorine, an atomic ratio of sulfur to oxygen in the sulfide solid electrolyte is about 4 or higher, and an atomic ratio of chlorine to the at least two of bromine, iodine, and fluorine is about 9 or higher.

Sulfide solid electrolyte for all-solid secondary battery, method of preparing the same, and all-solid secondary battery including the same

The present invention provides a negative electrode for a lithium metal battery and a lithium metal battery comprising the same, the negative electrode comprising: a first negative electrode including a lithium metal negative electrode; and a second negative electrode which is disposed on the first negative electrode and includes a coating layer including a carbon-based material. By using the negative electrode for a lithium metal battery, a lithium metal battery can have an improved charge and discharge efficiency and life time.

Negative electrode for lithium metal battery and lithium metal battery comprising same

An all-solid secondary battery includes a cathode; an anode including natural graphite; and a solid electrolyte layer between the cathode and the anode, wherein the natural graphite has an average particle diameter (D50) in a range of greater than about 10 μm to about 20 μm or less and includes an amorphous carbon coating layer.

All-solid secondary battery

An anode layer for all-solid secondary batteries, an all-solid secondary battery, and a method of manufacturing an all-solid secondary battery, the anode layer including an anode current collector; and a first anode active material layer on the anode current collector, wherein the first anode active material layer includes a metal-carbon composite including a metal, carbon, and a polyol.

Anode layer for all-solid secondary battery, all-solid secondary battery including the same, and method of manufacturing all-solid secondary battery

A sulfide solid electrolyte for all-solid secondary batteries, a method of preparing the same, and an all-solid secondary battery, the sulfide solid electrolyte including lithium, phosphorus, sulfur, and a halogen, wherein: the sulfide solid electrolyte has an argyrodite-type crystal structure, a ratio (I/Iratio) of a peak intensity at a 2θ of 29±0.1° to a peak intensity at a 2θ of 30±0.1° is 0.06 or less, the peak intensities being obtained by X-ray diffraction analysis of the sulfide solid electrolyte, and a ratio (I/Iratio) of a peak intensity at a 2θ of 27.1±0.1° to a peak intensity at a 2θ of 30±0.1° is 0.06 or less, the peak intensities being obtained by X-ray diffraction analysis of the sulfide solid electrolyte.

Sulfide solid electrolyte for all-solid secondary battery, method of preparing same, and all-solid secondary battery including the same

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Yongin-si, South Korea

Sangil Han