Composite electrolyte structure and lithium metal battery including the same

A composite electrolyte and structure technology, applied in the direction of non-aqueous electrolyte batteries, lithium batteries, solid electrolytes, etc., can solve the problems of reduced life and stability

Active Publication Date: 2018-06-29
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 such a lithium metal thin film may have reduced lifetime and stability

Method used

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  • Composite electrolyte structure and lithium metal battery including the same
  • Composite electrolyte structure and lithium metal battery including the same
  • Composite electrolyte structure and lithium metal battery including the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0322] Example 1: Fabrication of Lithium Metal Batteries

[0323] Poly(styrene-b-divinylbenzene) block copolymer microspheres (having an average particle size of about 3 μm, EPR-PSD-3, available from EPRUI Nanoparticles & Microspheres Co., Ltd.) were added to anhydrous tetrahydrofuran to A mixture comprising 5% by weight of block copolymer was obtained.

[0324]The block copolymer in the mixture comprising the block copolymer comprises polystyrene blocks and polydivinylbenzene blocks in a mixing ratio of about 9:1 by weight, and poly(styrene-b-divinyl Benzene) block copolymers have a weight average molecular weight of about 100,000 Daltons.

[0325] Lithium bis(fluorosulfonyl)imide (LiFSI, LiN(SO 2 f) 2 ) is added to a mixture comprising a block copolymer to obtain a protective layer-forming composition. The amount of LiFSI was about 30 parts by weight based on 100 parts by weight of the poly(styrene-b-divinylbenzene) copolymer.

[0326] The protective layer-forming com...

Embodiment 2

[0335] Example 2: Fabrication of Lithium Metal Batteries

[0336] A lithium metal battery was fabricated in the same manner as in Example 1, except that a ceramic conductor and a positive electrode electrolyte were included between the positive electrode and the solid electrolyte, and LiNi was used 0.6 Co 0.2 Mn 0.2 O 2 instead of Li[Ni 0.898 Co 0.087 Al 0.015 ]O 2 Except for the manufacture of positive electrodes. The lithium metal battery has a structure in which a lithium negative electrode, a solid electrolyte (first electrolyte), a second electrolyte, a positive electrode electrolyte, and a positive electrode are sequentially stacked on each other in this described order.

[0337] The second electrolyte used comprising a ceramic conductor was a ceramic solid electrolyte (Li 1.5 Al 0.5 Ti 1.5 (PO 4 ) 3 (Lithium Titanium Aluminophosphate; LATP), with a thickness of about 200 μm, available from Ohara glass).

[0338] The positive electrolyte was prepared by mi...

Embodiment 3

[0340] Example 3: Fabrication of Lithium Metal Batteries

[0341] Manufactured in the same manner as in Example 2 as Figure 7A The lithium metal battery shown in , except that no protective layer is formed on the lithium metal negative electrode. like Figure 7A As shown in , the lithium metal battery has a structure in which a first electrolyte 73 including microspheres 76, a second electrolyte 72 including LATP, a positive electrode electrolyte 71 and a positive electrode 80 are sequentially stacked on a lithium metal negative electrode 70.

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Abstract

Provided is a composite electrolyte structure and lithium metal battery including the same. The composite electrolyte structure includes: a protective layer having a Young's modulus of about 106 pascals or greater and including a first particle, the first particle including an organic particle, an inorganic particle, an organic-inorganic particle, or a combination thereof, wherein the particle inthe protective layer has a particle size of greater than 1 micrometer to about 100 micrometers; and a solid electrolyte layer including a second particle including an organic particle, an inorganic particle, an organic-inorganic particle, or a combination thereof, wherein the second particle has a particle size of greater than 1 micrometer to about 100 micrometers; wherein the first particle andthe second particle are the same or different, and wherein the protective layer is on the solid electrolyte layer.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims the benefit of Korean Patent Application No. 10-2016-0169748 filed with the Korean Intellectual Property Office on December 13, 2016, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present disclosure relates to composite electrolyte structures and lithium metal batteries including the same. Background technique [0004] Lithium secondary batteries are high-performance batteries having the highest energy density among currently available secondary batteries, and can be applied to various fields such as electric vehicles. [0005] A lithium secondary battery may use a lithium thin film as a negative electrode. When using thin lithium metal as the anode, the anode may be highly reactive with liquid electrolytes during charge or discharge due to the high reactivity of lithium, or may lead to dendrite growth on the lithium thin film anode. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/056H01M10/0525H01M50/414H01M50/417H01M50/426H01M50/434H01M50/449H01M50/457H01M50/489H01M50/491
CPCH01M10/0525H01M10/056H01M50/457H01M50/426H01M50/449H01M50/489H01M50/417H01M50/414H01M50/491H01M50/434H01M10/4235Y02E60/10H01M50/446H01M50/46H01M10/0562H01M10/052H01M2300/0068H01M2300/0065H01M4/624H01M4/04
Inventor 李龙键S.柳庾太焕张元硕
Owner SAMSUNG ELECTRONICS CO LTD
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