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Composite cathode active material for lithium battery, cathode for lithium battery including the same, and lithium battery including the cathode

一种复合正极、活性材料的技术，应用在活性物质电极、电极制造、电池电极等方向，能够解决需求增加等问题

Active Publication Date: 2017-01-25
SAMSUNG ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, as various devices have become more complex and perform multiple functions, there has been an increased demand for increasing the voltage of lithium batteries used as energy sources for devices

Method used

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  • Composite cathode active material for lithium battery, cathode for lithium battery including the same, and lithium battery including the cathode
  • Composite cathode active material for lithium battery, cathode for lithium battery including the same, and lithium battery including the cathode
  • Composite cathode active material for lithium battery, cathode for lithium battery including the same, and lithium battery including the cathode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0160] Embodiment 1: Preparation of composite positive electrode active material

[0161] 50mL ethanol and 0.26g ammonium fluoride (NH 4 F) Add to 0.89g aluminum nitrate hydrate (Al(NO 3 ) 3 9H 2 O), and the mixture was stirred at a temperature of about 80° C. for 10 minutes to prepare a reaction mixture. Aluminum nitrate hydrate (Al(NO 3 ) 3 9H 2 O) to ammonium fluoride (NH 4 The molar ratio of F) is about 1:3.

[0162] 20 g of the cathode active material prepared in Comparative Example 1 was added to the reaction mixture, and the reaction mixture was stirred at a temperature of about 80° C. for precipitation. The precipitate obtained by precipitation was dried at a temperature of about 120° C. for 12 hours, and the dried resultant was heat-treated at a temperature of about 400° C. for 5 hours in a nitrogen atmosphere to obtain 2 o 3 ) and a composite positive electrode active material of a coating layer of lithium fluoride. The total amount of alumina and lithium ...

Embodiment 2

[0163] Embodiment 2: Preparation of composite positive electrode active material

[0164] A composite positive electrode active material having a coating layer comprising alumina and lithium fluoride was prepared in the same manner as in Example 1, except as follows: Aluminum nitrate hydrate (Al(NO 3 ) 3 9H 2 O) and ammonium fluoride (NH 4 The amounts of F) were changed to 2.68 g and 0.79 g, respectively. The total amount of alumina and lithium fluoride was about 3 parts by weight based on 100 parts by weight of the total weight of the composite cathode active material.

Embodiment 3

[0165] Embodiment 3: Preparation of composite positive electrode active material

[0166] A composite positive electrode active material having a coating layer comprising alumina and lithium fluoride was prepared in the same manner as in Example 1, except as follows: Aluminum nitrate hydrate (Al(NO 3 ) 3 9H 2 O) and ammonium fluoride (NH 4 The amounts of F) were changed to 4.46 g and 1.32 g, respectively. The total amount of alumina and lithium fluoride was about 5 parts by weight based on 100 parts by weight of the total weight of the composite cathode active material.

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Abstract

A composite cathode active material for a lithium battery including: a lithium composite oxide; and a coating layer including a metal oxide and a lithium fluoride, (LiF) wherein the coating layer is disposed on at least a portion of a surface of the lithium composite oxide.

Description

technical field [0001] The present disclosure relates to a composite cathode active material for a lithium battery, a cathode for a lithium battery including the composite cathode active material, and a lithium battery including the cathode. Background technique [0002] Lithium batteries have been used as power sources for operating vehicles as well as portable electronic devices, and thus efforts have been made to improve the capacity of lithium batteries. Furthermore, as various devices have become more complex and perform multiple functions, there has been an increased demand for increasing the voltage of lithium batteries used as energy sources for the devices. Demands for reducing the size and weight of lithium batteries have also increased. [0003] To fabricate lithium batteries with increased voltage, and reduced size and weight, it would be desirable to have positive active materials with improved cycle characteristics and rate capabilities. Contents of the inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/62C01F7/043H01M50/417H01M50/489H01M50/491
CPCH01M4/364H01M4/485H01M4/628H01M50/491H01M50/417H01M50/489H01M4/505H01M4/525H01M4/5825H01M10/0525C01G53/50C01P2004/04C01P2006/40H01M4/366C01P2002/72C01P2004/84C01P2006/11C01P2002/54Y02E60/10C01F7/043Y02T10/70H01M50/44H01M4/0402H01M4/0404H01M4/0435H01M4/0471H01M4/131H01M4/1391H01M4/582H01M4/623H01M4/625H01M10/0568H01M10/0569H01M2004/021H01M2004/028H01M2220/20H01M2220/30H01M2300/0034H01M2300/0037
Inventor 朴光镇朴骏镐尹在久洪锡基
Owner SAMSUNG ELECTRONICS CO LTD
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