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Negative electrode active material, negative electrode comprising negative electrode active material, and lithium secondary battery comprising negative electrode

A negative electrode active material and negative electrode technology, which can be used in secondary batteries, lithium batteries, active material electrodes, etc., and can solve problems such as battery capacity degradation

Active Publication Date: 2020-12-15
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using only a part of the capacity will lead to deterioration of the battery capacity

Method used

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  • Negative electrode active material, negative electrode comprising negative electrode active material, and lithium secondary battery comprising negative electrode
  • Negative electrode active material, negative electrode comprising negative electrode active material, and lithium secondary battery comprising negative electrode
  • Negative electrode active material, negative electrode comprising negative electrode active material, and lithium secondary battery comprising negative electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Embodiment 1: the manufacture of negative electrode

[0065] (1) Preparation of negative electrode active material

[0066] Prepare the average particle size (D 50 ) is 5 μm silicon and used as the core. Combine 9 g of this core with 1 g of Li 1.1 V 0.9 o 2 mix. Thereafter, the mixture was dried in a drying oven at 150° C. for 48 hours. Through the above steps, the anode active material of Example 1, which includes a core and a coating layer provided on the core, was prepared.

[0067] (2) Manufacture of negative electrode

[0068] Prepared negative electrode active material, carbon black as conductive material, carboxymethyl cellulose (CMC) as binder and styrene-butadiene rubber (SBR) with the weight ratio of 70:10:10:10 Mix to make 5 g of mixture. Distilled water was added to the mixture to prepare negative electrode slurry (the solid content of the slurry was 40% by weight). The negative electrode slurry was applied onto a copper (Cu) metal thin film havi...

Embodiment 2

[0069] Example 2: Manufacture of Negative Electrode

[0070] Manufacture the negative electrode of embodiment 2 in the same manner as in embodiment 1, the difference is that the Li of 3g is mixed when preparing the negative electrode active material of embodiment 1 1.1 V 0.9 o 2 .

Embodiment 3

[0071] Embodiment 3: the manufacture of negative electrode

[0072] Manufacture the negative electrode of embodiment 3 in the same manner as in embodiment 1, the difference is that when preparing the negative electrode active material of embodiment 1, mix the Li of 0.2g 1.1 V 0.9 o 2 .

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Abstract

The present invention provides a negative electrode active material comprising: a core comprising silicon; and a coating layer arranged above the core and comprising a coating material, wherein the coating material comprises at least any one selected from the group consisting of LiaVbO2 and MgH2, and the ranges of a and b in LiaVbO2 are 0.5.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2018-0055515 filed with the Korean Intellectual Property Office on May 15, 2018, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates to a negative electrode active material, a negative electrode containing the negative electrode active material, and a lithium secondary battery containing the negative electrode, wherein the negative electrode active material comprises: a core, the core contains silicon; and a coating, the A coating is disposed on the core and includes a coating material, and the coating material includes a coating material selected from the group consisting of Li a V b o 2 and MgH 2 At least one of the group consisting of, and in the Li a V b o 2 The range of a and the range of b are 0.5<a<1.5 and 0.5<b<1.5 respectiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/485H01M4/58H01M10/052
CPCH01M4/58H01M4/485Y02E60/10H01M10/0525H01M4/134H01M4/386H01M4/366H01M4/62H01M10/052H01M4/0404H01M4/48H01M2004/027H01M2004/028
Inventor 宋俊赫蔡午秉金帝映李龙珠
Owner LG ENERGY SOLUTION LTD