Solid electrolyte membrane, method for manufacturing same, and method for selecting solid electrolyte membrane

A solid electrolyte membrane, solid electrolyte technology, applied in solid electrolyte, non-aqueous electrolyte storage battery, electrolyte and other directions, can solve problems such as difficult to visually determine, difficult to determine the pores of porous sheet solid electrolyte material fully filled, etc., to reduce manufacturing costs, The effect of easy deformation and excellent strength

Pending Publication Date: 2021-11-12
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of such a composite type solid electrolyte membrane, there is a problem in that it is difficult to determine whether the pores of the porous sheet are sufficiently filled with the s

Method used

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  • Solid electrolyte membrane, method for manufacturing same, and method for selecting solid electrolyte membrane
  • Solid electrolyte membrane, method for manufacturing same, and method for selecting solid electrolyte membrane
  • Solid electrolyte membrane, method for manufacturing same, and method for selecting solid electrolyte membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0088] First, polyethylene oxide (PEO, Mw=4,000,000 g / mol) was dissolved in acetonitrile (AN) as a solvent to prepare a polymer solution having a concentration of 4% by weight. Here, LiTFSI as a lithium salt is further introduced such that [EO] / [Li + ] may be in a molar ratio of 18 / 1. The polymer solution was stirred overnight at 70° C. so that the PEO and lithium salt could be fully dissolved therein. Next, an additive solution containing an initiator and a curing agent is prepared. Curing agent is PEGDA (Mw=575), initiator is benzoyl peroxide (BPO), wherein the consumption of polyethylene diacrylate (PEGDA) is 20% by weight (based on PEO), and the consumption of BPO is 1% (based on PEGDA), and acetonitrile was used as solvent. The additive solution was stirred for about 1 hour so that the ingredients introduced therein could be thoroughly mixed. Then, add the additive solution to the polymer solution and mix it thoroughly. After that, 10 μL of commercially available fou...

Embodiment 2

[0090] A solid electrolyte membrane layer and a porous nonwoven web were prepared in the same manner as in Example 1. The solid electrolyte membrane layer is placed on a porous nonwoven web (87% porosity, 40 μm in thickness), and pressed at 25° C. by roll pressing, so that the solid electrolyte membrane layer can be pressed into the porous nonwoven web . In this way, a solid electrolyte membrane is obtained comprising a solid electrolyte membrane layer integrated with a porous nonwoven web. The solid electrolyte membrane has a thickness of about 50 μm.

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Abstract

The invention relates to a method for manufacturing a solid electrolyte membrane. According to the present invention, the method for manufacturing a solid electrolyte membrane can check, by means of a visible method, the degree of charge of a solid electrolyte material in a porous sheet, and thus selection of a material for a solid electrolyte membrane and a manufacturing process therefor can be optimized through a simple method. In addition, manufacturing costs for a solid electrolyte membrane manufactured by applying a material and a manufacturing process, which are selected according to the checking method, can be reduced, and the shape of the solid electrolyte membrane can be readily altered, and thus the solid electrolyte membrane facilitates processing when applied to various shapes of batteries. Additionally, since a porous polymer material such as a nonwoven fabric and a solid electrolyte material are combined, the solid electrolyte membrane according to the present invention can be manufactured into a thin film shape while having excellent strength, and thus is advantageous in improving the energy density of a battery.

Description

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Claims

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Application Information

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Owner LG ENERGY SOLUTION LTD
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