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

A technology of electrode active materials and content, which is applied in the direction of lithium batteries, non-aqueous electrolyte batteries, battery electrodes, etc., can solve the problems of battery performance deterioration and achieve the effect of preventing deterioration

Active Publication Date: 2017-03-01
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0123] The stannous chloride (SnCl 2 ) and magnesium nitrate (Mg(NO 3 ) 2 ) were mixed at a molar ratio of about 1:2, and then water was added to the mixture to make a lithium-free oxide precursor slurry. Li with an average particle size of about 15 μm 1.1 Ni 0.35 mn 0.41 co 0.14 o 2 Added to and mixed with the lithium-free oxide precursor slurry. The mixture is baked at a temperature of about 850° C. in an oxygen atmosphere for about 12 hours to produce a compound including SnMg formed on its surface. 2 o 4 Li of the surface treatment layer 1.1 Ni 0.35 mn 0.41 co 0.14 o 2 core positive electrode active material.

[0124] The content of the precursor of the lithium-free oxide used is about 3% by weight, based on the precursor of the lithium-free oxide and Li 1.1 Ni 0.35 mn 0.41 co 0.14 o 2 of the total weight.

Embodiment 2

[0126] The positive electrode active material was fabricated using the same method as in Example 1, except that SnCl was used 2 and zinc acetate (Zn(O 2 CCH 3 ) 2 ) as a precursor to lithium-free oxides to form including SnZn 2 o 4 surface treatment layer.

Embodiment 3

[0128] The positive electrode active material was fabricated using the same method as in Example 1, except that Mg(NO 3 ) 2 and aluminum nitrate (Al(NO 3 ) 3 ) as a precursor to lithium-free oxides to form 2 o 4 surface treatment layer.

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Abstract

Disclosed are an electrode active material, a manufacturing method thereof, and an electrode and a lithium battery using the same. The electrode active material includes: a core capable of occluding and releasing lithium; and a surface treatment layer formed on at least a part of a surface of the core, wherein the surface treatment layer includes a lithium-free core having a spinel structure. oxide.

Description

technical field [0001] The present disclosure relates to electrode active materials, methods for their preparation, and electrodes and lithium batteries containing them. Background technique [0002] In addition to reducing the size and weight of lithium batteries, increasing their energy density is also important for smaller and higher performance devices. That is, high-voltage and high-capacity lithium batteries are becoming important. [0003] In order to realize a lithium battery satisfying the above-mentioned requirements, research is being conducted on positive electrode active materials for high voltage and high capacity. [0004] When typical positive electrode active materials for high voltage and high capacity are used, side reactions such as elution of transition metals and gas generation occur at high temperatures and / or voltages higher than about 4.4V. Due to the side reactions, the performance of the battery deteriorates in a high temperature and high voltage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/485H01M4/525H01M4/131
CPCC01G45/1228C01G51/50C01G53/50C01P2004/80C01P2006/40H01M4/131H01M4/1391H01M4/366H01M4/505H01M10/052Y02E60/10C04B35/64H01M4/48
Inventor 崔原彰朴晋焕
Owner SAMSUNG ELECTRONICS CO LTD