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Composite cathode active material, cathode and lithium battery including the composite cathode active material and method of preparing the composite cathode active material

A technology of active materials and composite positive electrodes, applied in battery electrodes, active material electrodes, chemical instruments and methods, etc., can solve the problems of battery performance, battery high rate characteristics and deterioration of life characteristics

Active Publication Date: 2017-12-22
SAMSUNG ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to side reactions of the positive electrode active material and by-products generated from the positive electrode active material, battery performance such as high rate characteristics and lifetime characteristics of the battery may deteriorate

Method used

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  • Composite cathode active material, cathode and lithium battery including the composite cathode active material and method of preparing the composite cathode active material
  • Composite cathode active material, cathode and lithium battery including the composite cathode active material and method of preparing the composite cathode active material
  • Composite cathode active material, cathode and lithium battery including the composite cathode active material and method of preparing the composite cathode active material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0145] a) Preparation of layered double hydroxide

[0146] 2 mmol of Co(NO 3 ) 2 ·6H 2 O and 1mmol of Al(NO 3 ) 3 9H 2 The 10 ml solution mixture of O was added within 5 seconds to a vigorously stirred 0.15M NaOH solution and stirred for 25 minutes under nitrogen atmosphere.

[0147] The slurry thus obtained was centrifuged, washed with deionized water, and dried at 150 °C for 5 h to prepare Co 2 Al(OH) 6 (NO 3 - )· X h 2 Layered double hydroxides (LDH) of O (where x is 4-6).

[0148] b) Preparation of layered transition metal oxides

[0149] NiSO as nickel precursor 4 (H 2 O) 6 , CoSO as cobalt precursor 4 , and MnSO as a manganese precursor 4 h 2 O was added to water at a molar ratio of 80:15:5 to prepare an aqueous precursor solution. While stirring the aqueous solution, an aqueous sodium hydroxide solution was slowly added thereto to neutralize the aqueous precursor solution to precipitate Ni 0.8 co 0.15 mn 0.05 (OH) 2 . The precipitate was filtered...

Embodiment 2

[0160] A composite cathode active material was prepared in the same manner as in Example 1, except that 1 part by weight of the layered double hydroxide and 100 parts by weight of the layered transition metal oxide were mixed.

[0161] The thus-prepared composite cathode active material has the 1.03 [Ni 0.8 co 0.15 mn 0.05 ]O 2 1.0 wt% LiCo as a layered double oxide (LDO) on the surface of 2 AlO 4 .

Embodiment 3

[0163] A composite cathode active material was prepared in the same manner as in Example 1, except that 2 parts by weight of the layered double hydroxide and 100 parts by weight of the layered transition metal oxide were mixed.

[0164] The thus-prepared composite cathode active material has the 1.03 [Ni 0.8 co 0.15 mn 0.05 ]O 2 2.0% by weight of LiCo as a layered double oxide (LDO) on the surface of 2 AlO 4 .

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Abstract

A composite cathode active material, includes a first metal oxide having a first layered crystal structure; and a second metal oxide having a second layered crystal structure, wherein the second metal oxide includes a layered double oxide (LDO).

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2016-0073828 filed with the Korean Intellectual Property Office on June 14, 2016, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present disclosure relates to a composite cathode active material, a cathode and a lithium battery including the composite cathode active material, and a method for preparing the composite cathode active material. Background technique [0004] In order to manufacture various devices in a small size and exhibit high performance, it has become important to manufacture lithium batteries having high energy density, small size, and light weight. That is, a lithium battery having a high capacity has become important. [0005] Cathode active materials with high capacity have been studied to fabricate lithium batteries coping with the above-mentioned uses. [0006] In a...

Claims

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Application Information

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IPC IPC(8): H01M4/48H01M4/131H01M4/1391
CPCH01M4/131H01M4/1391H01M4/48H01M2004/028H01M4/628H01M10/0525H01M4/366H01M4/525C01P2002/82C01P2006/22C01P2004/84C01P2002/88C01P2002/72C01P2004/03C01G53/50C01G53/006Y02E60/10H01M4/505H01M4/0471C01P2002/00C01G53/42
Inventor 孙维焕朴晟镕河镇秀洪锡基朴光镇朴骏镐崔棅珍
Owner SAMSUNG ELECTRONICS CO LTD
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