Sk on Co., Ltd.

Silicon Works Co., Ltd.

Electronics and Telecommunications Research Institute

Lg Chem, Ltd

Hanon Systems

Sk Innovation Co., Ltd.

Ji Hoon Choi

Jik Soo Kim

Sang Bok Kim

Jeong Bae Yoon

Ji Hong Yuk

Bo Sung Kim

Jun Hun Park

Dae Hee Bae

Sung Woo Han

Mi Jung Noh

Tae Kyoung Lee

Hee Jun Kweon

Sang Min Park

Myoung Lae Kim

Sang Hye Shin

Kwang Ho Lee

Seung Beom Cho

Ji Sun Lee

Kook Hyun Han

Sung Soon Park

Seung Ok Lee

Dong Wook Ha

Jong Hun Lee

Byung Tae Jang

In Kook Jun

Seung Yong Lee

Chung Hyun Ahn

Jung Moon Sung

Dong Il Jang

Jeong Hoon Jeun

Jae Young Choi

Seong Baek Kim

Kyoung Ho Choi

A cathode active material for a lithium secondary battery is provided. The cathode active material includes lithium-transition metal composite oxide particles having a crystallite size of 120 nm or less in a () plane direction measured through X-ray diffraction (XRD) analysis, and a ratio of the crystallite size of the lithium-transition metal composite oxide particle in the () plane direction to a crystallite size thereof in a () plane direction isor more.

Cathode active material for lithium secondary battery and method of manufacturing the same

A cathode active material for a lithium secondary battery of embodiments of the present invention includes a lithium composite oxide, a first coating part formed on a surface of the lithium composite oxide and containing aluminum, and a second coating part formed on the first coating part and containing boron. Thereby, stability and electrical characteristics of the secondary battery may be improved.

Cathode active material for lithium secondary battery, lithium secondary battery and method of manufacturing the same

The present invention provides a cathode active material for a secondary battery, which includes a lithium metal oxide particle having a form of a secondary particle in which a plurality of primary particles are agglomerated, wherein the primary particles comprise a particle having a triangular shape which has a size of a minimum internal angle of 45° or more and a maximum height of 0.5 μm or more.

A cathode active material for a lithium secondary battery is provided. According to embodiments of the present invention, the cathode active material includes a lithium-transition metal composite oxide particle including a plurality of primary particles. The lithium-transition metal composite oxide particle has a lithium-boron-containing portion formed between the primary particles. Thereby, it is possible to improve life-span properties and capacity properties by removing residual lithium.

Cathode active material for lithium secondary battery and lithium secondary battery including the same

The cathode active material for a lithium secondary battery according to embodiments of the present invention includes a lithium-transition metal composite oxide particle including a plurality of primary particles, and the lithium-transition metal composite oxide particle includes a lithium-sulfur-containing portion formed between the primary particles. Thereby, it is possible to improve life-span properties and capacity properties by preventing the layer structure deformation of the primary particles and removing residual lithium.

A cathode active material precursor according to embodiments of the present invention includes a composite hydroxide particle in which primary precursor particles are aggregated. The primary precursor particles include a particle having a triangular shape in which a minimum interior angle is 30° or more and a ratio of a length of a short side relative to a length of a long side is 0.5 or more. A cathode active material and a lithium secondary having improved high temperature stability is provided using the cathode active material precursor.

Cathode active material precursor, cathode active material, lithium secondary battery and method of manufacturing the same

Disclosed is a display device including a display panel having a plurality of pixels, the display panel comprising a first display area having first resolution and a second display area having second resolution, the second resolution being lower than the first resolution, and a controller configured to generate display area information of each of the plurality of pixels, to blur an image that is displayed in the second display area based on the display area information, and to perform control such that the blurred image is displayed on the display panel.

Controller configured to generate display area information and display device including the same

A cathode active material for a lithium secondary battery has a structure of a lithium-nickel-based metal oxide. A crystal size in a (104) plane defined by Equation 1 is less than 200 nm. A thickness of a TM slab measured by a Rietveld method in a crystal structure of a space group R-3m by an X-ray diffraction (XRD) analysis is 2.15 Å or less. A thickness of a Li slab thickness measured by the Rietveld method in the crystal structure of the space group R-3m by the XRD analysis is 2.585 Å or more.

The cathode active material according to embodiments of the present invention includes a lithium composite oxide particle having a form of secondary particle in which a plurality of primary particle are aggregated, wherein the primary particles respectively include a lithium conduction pathway through which lithium ions are diffused. Wherein the primary particles include a first particle, and the first particle has an angle of 45° to 90° formed by a direction from a center of the first particle to a center of the lithium composite oxide particle and a direction of the lithium conduction pathway included in the first particle, wherein a ratio of the number of the first particles among the primary particles located on a surface of the lithium composite oxide particle is 20% or more.

Cathode active material and lithium secondary battery including the same

A cathode active material for a lithium secondary battery includes a lithium-aluminum-titanium oxide formed on a surface of a lithium metal oxide particle having a specific formula. The cathode active material may have an improved structural stability even in a high temperature condition.

A method of manufacturing a cathode active material for a lithium secondary battery according to embodiments of the present invention includes performing a first heat treatment on a first mixture of a transition metal precursor and a lithium precursor at a first calcination temperature to obtain a preliminary lithium-transition metal composite oxide particle; and performing a second heat treatment on a second mixture obtained by adding the lithium precursor to the preliminary lithium-transition metal composite oxide particle at a second calcination temperature which is lower than the first calcination temperature to form a lithium-transition metal composite oxide particle.

Growing community of inventors

Daejeon, South Korea

Ji Hoon Choi