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Positive electrode active material and lithium secondary battery comprising same

A positive active material and positive electrode technology, applied in the direction of secondary batteries, lithium batteries, active material electrodes, etc., can solve the problems associated with the increase in resistance characteristics, improve life characteristics and efficiency characteristics, and solve the effect of resistance problems

Pending Publication Date: 2021-04-20
ECOPRO BM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, with LiNiO 2 Similar to the lithium-based positive electrode active material, the above-mentioned lithium-based composite oxide has the advantages of increased energy density and improved output characteristics as the nickel content increases, but on the other hand, there is a problem with the increase in resistance characteristics.

Method used

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  • Positive electrode active material and lithium secondary battery comprising same
  • Positive electrode active material and lithium secondary battery comprising same
  • Positive electrode active material and lithium secondary battery comprising same

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0156] (1) Preparation of positive electrode active material

Embodiment 1

[0158] First, nickel sulfate, cobalt sulfate, and manganese sulfate are prepared, and a hydroxide precursor is synthesized by performing a co-precipitation reaction, LiOH is added to the synthesized precursor, followed by firing to prepare a lithium composite oxide. Specifically, after mixing LiOH with the precursor, maintaining O in the sintering furnace 2 The atmosphere was heated at 2°C per minute, heat treated at 690°C for 10 hours, and quenched at 10°C / min or more to obtain a lithium composite oxide.

[0159] Next, distilled water was added to the above lithium composite oxide, followed by washing with water for 1 hour, and the washed lithium composite oxide was filtered and dried. By keeping O in the same sintering furnace 2 atmosphere, heat treatment at 300° C. for 8 hours at a temperature increase of 2° C. per minute, and then natural cooling to obtain a lithium composite oxide. The cross-sectional SEM image of the above positive electrode active material is shown in...

Embodiment 2

[0161] In addition to combining the lithium composite oxide of Example 1 with Al 2 o 3 、TiO 2 and ZrO 2 They were mixed and further heat-treated so that the lithium composite oxide was prepared in the same manner as in Example 1, except that the finally formed lithium composite oxide contained aluminum, titanium, and zirconium. The cross-sectional SEM image of the above positive electrode active material is shown in Figure 6 middle.

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Abstract

The present invention relates to a positive electrode active material and a lithium secondary battery comprising the same, relates to the positive electrode active material and the lithium secondary battery using a positive electrode containing the positive electrode active material, and more particularly, the present invention relates to the positive electrode active material that is able to solve a problem of increased resistance according to an increase in Ni content by forming a charge transport channel in a lithium composite oxide and the lithium secondary battery using the positive electrode containing the positive electrode active material.

Description

technical field [0001] The present invention relates to a positive electrode active material and a lithium secondary battery using a positive electrode including the above positive electrode active material. Background technique [0002] Batteries use substances that electrochemically react at positive and negative electrodes to store electricity. A representative example of such a battery is a lithium secondary battery that stores electric energy from a change in chemical potential during intercalation / deintercalation of lithium ions of a positive electrode and a negative electrode. [0003] The above-mentioned lithium secondary battery is made by using materials capable of reversibly intercalating or deintercalating lithium ions as positive electrode active materials and negative electrode active materials, and filling an organic electrolyte solution or a polymer electrolyte solution between the positive electrode and the negative electrode. [0004] As a positive electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/505H01M4/525H01M10/0525
CPCC01G53/44H01M4/525C01P2004/84C01P2004/03C01P2004/04C01P2004/50Y02E60/10H01M4/366H01M4/131H01M4/505H01M10/052H01M2004/028H01M10/0525H01M2004/021
Inventor 崔文豪徐晙源尹振暻李重汉尹美慧崔昇禹崔光奭张睿里裴中浩
Owner ECOPRO BM CO LTD
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