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Separators for lithium-sulfur secondary batteries

A technology for sulfur secondary batteries and liquid separators, which is applied in lithium batteries, battery pack components, non-aqueous electrolyte batteries, etc., and can solve the problem of lack of supplementation.

Active Publication Date: 2020-02-21
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the methods described do not replenish the electrolyte associated with the ionomer membrane, especially the lithiated separator of lithium-sulfur secondary batteries

Method used

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  • Separators for lithium-sulfur secondary batteries
  • Separators for lithium-sulfur secondary batteries
  • Separators for lithium-sulfur secondary batteries

Examples

Experimental program
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Effect test

Embodiment 1-3

[0076] Sulfur, a conductive material (vapour-grown carbon fiber (VGCF)), and a binder (PVDF) were mixed at a ratio of 70wt%:20wt%:10wt% to prepare a slurry. The slurry was cast on aluminum foil and dried at 80 °C for 24 h to fabricate a positive electrode with a particle size of 14 phi. The negative electrode was prepared to have a size of 16phi by using a lithium foil (100 micrometers in thickness). Both the supplementary liquid membrane and the ionomer membrane 8b are used as the membrane. The ionomer membrane 8b was placed on the lithium foil as the negative electrode, the separator for replenishing the electrolyte was placed on the ionomer membrane, and then the positive electrode was placed on the separator for replenishing the electrolyte. Afterwards, an electrolyte with 1 M lithium bis(trifluoromethanesulfone)imide (LiTFSI) in tetraglyme (TEGDME):dioxolane (DIOX) (1:1) was injected into the resulting configuration , thus producing Figure 8A Coin-type batteries shown...

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Abstract

The present invention provides a separator for a lithium-sulfur secondary battery. A lithium-sulfur secondary battery includes a sulfur cathode, a lithium anode, an ionomer membrane, and a supplemental liquid separator. Lithium-sulfur batteries include a dual separator capable of adequately providing electrolyte to the lithium-sulfur battery's sulfur-conducting positive electrode, and the use of an ionomer membrane at the lithium negative electrode.

Description

technical field [0001] The present disclosure relates to a lithium-sulfur battery (lithium-sulfur battery) having a dual separator (dual separator) including a separator capable of adequately providing electrolyte to the sulfur-conducting positive electrode of the lithium-sulfur battery, And the ionomer membrane (ionomer membrane, ionomer membrane) used at the lithium negative electrode. Background technique [0002] Recently, studies have been conducted on the application of ionomer membranes, which have been widely used in the field of fuel cells, to lithium-sulfur batteries in order to solve the shuttle effect (shuttle effect) and Coulombic efficiency by preventing the movement of polysulfides decrease. In ionomer membranes, the SO of perfluorosulfonic acid (PFSA) polymer membranes 3 h - The group is replaced by Li. [0003] In particular, when in the membrane H + The ions are replaced by lithium, and when the membrane is used in a lithium-sulfur battery, high cation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/16H01M10/052H01M50/414H01M50/417H01M50/426H01M50/429H01M50/449H01M50/457H01M50/491
CPCH01M10/052H01M50/44H01M50/4295H01M50/491H01M50/426H01M50/429H01M50/414H01M50/417H01M50/449H01M50/457Y02E60/10Y02P70/50H01M50/437H01M4/38H01M4/382H01M4/134H01M50/46H01M50/463
Inventor 金兑映金东熺柳京汉
Owner HYUNDAI MOTOR CO LTD