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Electrode active material, preparation method thereof, and electrode and lithium battery containing the same

A technology of electrode active material and lithium oxide, which can be used in non-aqueous electrolyte batteries, electrode manufacturing, lithium batteries, etc., and can solve problems such as battery performance deterioration

Active Publication Date: 2013-05-08
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to these side reactions, battery performance deteriorates in high temperature and high voltage environments

Method used

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  • Electrode active material, preparation method thereof, and electrode and lithium battery containing the same
  • Electrode active material, preparation method thereof, and electrode and lithium battery containing the same
  • Electrode active material, preparation method thereof, and electrode and lithium battery containing the same

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0128] Preparation Example 1 (dry process)

[0129] Tin oxide (SnO) and zinc oxide (ZnO) were mixed in a molar ratio of about 1:2 and milled in a planetary ball mill (Fritsch, Planetary mono mill 6) at about 300 to about 500 rpm for about 5 hours. Subsequently, SnZn having a spinel structure was prepared by sintering the resultant at about 1200°C for about 48 hours in an air atmosphere. 2 o 4 . Then, by using a paint shaker (paint shaker) to SnZn 2 o 4 SnZn with a diameter of about 100 nm was prepared by grinding for about 1 hour 2 o 4 nanoparticles.

[0130] figure 2 Shows that the SnZn prepared in Preparation Example 1 2 o 4 Scanning electron microscope (SEM) image of nanoparticles.

Embodiment 1

[0135] SnO and ZnO were mixed at a molar ratio of about 1:2, and then milled in a planetary ball mill (Fritsch, Planetary mono mill 6) at about 300 to about 500 rpm for about 5 hours. Subsequently, SnZn having a spinel structure was prepared by sintering the resultant at about 1200°C for about 48 hours in an air atmosphere. 2 o 4 . Then, by using a paint shaker to mix the SnZn 2 o 4 SnZn with a diameter of about 100 nm was prepared by grinding for about 1 hour 2 o 4 nanoparticles.

[0136] 3 parts by weight of the SnZn 2 o 4 Nanoparticles and 97 parts by weight of LiNi with an average particle size of 10 μm 0.5 mn 1.5 o 4 Powder mix. The LiNi with an average particle size of 10 μm 0.5 mn 1.5 o 4 powder shown in image 3 middle. The LiNi 0.5 mn 1.5 o 4 On-nucleus formation including SnZn 2 o 4 Positive active material of the surface treatment layer: the mixture was placed in a dry surface treatment device (Hosokawa Micron Corporation, Japan, Mechanofusion d...

Embodiment 2

[0138] The positive active material was fabricated using the same method as in Example 1, except that SnO and magnesium oxide (MgO) were used as lithium-free oxide precursors to form 2 o 4 outside the surface treatment layer.

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Abstract

An electrode active material includes a core capable of intercalating and deintercalating lithium; and a surface treatment layer disposed on at least a portion of a surface of the core, wherein the surface treatment layer includes a lithium-free oxide having a spinel structure, and an intensity of an X-ray diffraction peak corresponding to impurity phase of the lithium-free oxide, when measured using Cu-K± radiation, is at a noise level of an X-ray diffraction spectrum or less.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2011-0115365 filed in the Korean Intellectual Property Office on Nov. 7, 2011, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present disclosure relates to an electrode active material, a method for preparing the same, and an electrode and a lithium battery including the same. Background technique [0004] For smaller and higher performance devices, in addition to reducing the size and weight of lithium batteries, it is also important to increase the energy density of lithium batteries. That is, high-voltage and high-capacity lithium batteries have become important. [0005] In order to realize a lithium battery satisfying these requirements, research is being conducted on positive electrode active materials with high voltage and high capacity. [0006] When using typical cathode active m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/131H01M10/052
CPCH01M4/505H01M4/0471Y02E60/122H01M4/525Y02T10/7011H01M10/0525H01M4/0416H01M4/483H01M4/366H01M4/485Y02E60/10H01M4/667Y02T10/70
Inventor 崔原彰金圭成宋旼相崔荣敏金昤希金素妍
Owner SAMSUNG SDI CO LTD
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