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NEGATIVE ELECTRODE FOR LITHIUM METAL BATTERY, METHOD OF PREPARING NEGATIVE ELECTRODE, LITHIUM METAL BATTERY INCLUDING THE SAME, AND composite electrolyte

一种锂金属电极、锂金属电池的技术，应用在锂蓄电池、电池电极、非水电解质等方向，能够解决降低寿命和稳定性等问题

Active Publication Date: 2018-11-13
SAMSUNG ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a lithium secondary battery including a lithium metal thin film may have reduced lifetime and stability

Method used

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  • NEGATIVE ELECTRODE FOR LITHIUM METAL BATTERY, METHOD OF PREPARING NEGATIVE ELECTRODE, LITHIUM METAL BATTERY INCLUDING THE SAME, AND composite electrolyte
  • NEGATIVE ELECTRODE FOR LITHIUM METAL BATTERY, METHOD OF PREPARING NEGATIVE ELECTRODE, LITHIUM METAL BATTERY INCLUDING THE SAME, AND composite electrolyte
  • NEGATIVE ELECTRODE FOR LITHIUM METAL BATTERY, METHOD OF PREPARING NEGATIVE ELECTRODE, LITHIUM METAL BATTERY INCLUDING THE SAME, AND composite electrolyte

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0348] Preparation Example 1: Preparation of Composite Particles

[0349] 10 parts by weight of polyethylene glycol (PEG 200, weight average molecular weight: 200) was added to ethanol based on 100 parts by weight of ethanol. Next, poly(styrene-block-divinylbenzene) block copolymer microspheres (average particle diameter: about 3 μm, available from EPRUI Nanoparticles & Mcirospheres Co. Ltd.) were added to the mixture, and then mixed together to thereby A composite particle composition is obtained.

[0350] In the poly(styrene-block-divinylbenzene) block copolymer, the mixing weight ratio of the polystyrene block to the polydivinylbenzene block is about 98:2. The poly(styrene-block-divinylbenzene) block copolymer has a weight average molecular weight of about 100,000 Daltons.

[0351] The solvent was removed from the composite particle composition using a rotary evaporator to thereby prepare composite particles having a coating layer containing PEG200 formed on poly(styrene-...

preparation Embodiment 2

[0352] Preparation Example 2: Preparation of Composite Particles

[0353] Composite particles were prepared in substantially the same manner as in Preparation Example 1, except as follows: polyethylene glycol (PEG 600, weight average molecular weight: 600 Daltons) was used instead of polyethylene glycol (PEG 600, weight average molecular weight: 600 Daltons) when preparing the composite particle composition. Diol (PEG 200, weight average molecular weight: 200 Daltons). In the composite particles, the thickness of the coating layer containing PEG 600 is about 200 nm, and the amount of PEG 600 is about 20 parts by weight, based on 100 parts by weight of poly(styrene-block-divinylbenzene) micro ball.

preparation Embodiment 3

[0354] Preparation Example 3: Preparation of Composite Particles

[0355] Composite particles were prepared in substantially the same manner as in Preparation Example 1, except as follows: the thickness of the coating layer in the composite particles was adjusted to about 50 nm, and the amount of PEG 200 was adjusted to about 3 parts by weight, based on 100 parts by weight of poly(styrene-block-divinylbenzene) microspheres.

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Abstract

Provided are a negative electrode for a lithium metal battery, a method of preparing the negative electrode, a lithium metal battery including the same, and a composite electrolyte. The negative electrode includes: a lithium metal layer including lithium metal or a lithium metal alloy; and a protective layer on at least a portion of the lithium metal layer, wherein the protective layer includes aplurality of composite particles having a particle size of greater than about 1 micrometer to about 100 micrometers or less, wherein a composite particle of the plurality of composite particles comprises a particle comprising an organic particle, an inorganic particle, an organic-inorganic particle, or combination thereof; and a coating layer disposed on at least a portion of a surface of the particle, the coating layer including an ion conductive material including an ion conductive oligomer including an ion conductive unit, an ion conductive polymer including an ion conductive unit, or a combination thereof.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2017-0055755 filed on April 28, 2017 and Korean Patent Application No. 10-2018-0048017 filed on April 25, 2018 at the Korean Intellectual Property Office, and will The disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present disclosure relates to a negative electrode for a lithium metal battery, a method of preparing the negative electrode, and a lithium metal battery including the negative electrode. Background technique [0004] Lithium secondary batteries are high-performance batteries having the highest energy density compared to other types of commercially available secondary batteries, and are applicable to various fields including, for example, electric vehicles. [0005] A lithium secondary battery can use a lithium metal thin film as a negative electrode. When a lithium metal thin film...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/134H01M4/1395H01M4/36H01M4/38H01M4/62H01M10/052H01M10/056H01M50/417H01M50/426H01M50/491
CPCH01M4/134H01M4/1395H01M4/366H01M4/382H01M4/624H01M4/628H01M10/052H01M10/056H01M50/491H01M50/426H01M50/417H01M4/405H01M10/0562H01M10/0565H01M10/0585H01M2300/0065Y02E60/10H01M50/446H01M50/46Y02P70/50H01M10/0525H01M4/621H01M2004/028H01M2004/027H01M10/0569
Inventor 李龙键S.柳梁有盛杉本敏规庾太焕
Owner SAMSUNG ELECTRONICS CO LTD
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