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Solid polymer electrolyte and method for producing same

A solid polymer and electrolyte technology, applied in solid electrolytes, electrolytes, non-aqueous electrolytes, etc., can solve the problems of ion conductivity reduction, liquefaction, etc., and achieve the effect of improving mechanical strength

Active Publication Date: 2018-06-08
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Furthermore, in the case of polyethylene oxide (PEO) based polymers with low molecular weight, high ionic conductivity (σ) can be obtained at room temperature, but with the disadvantage that the polymer is liquefied in the presence of salts
That is, the movement of lithium ions in solid polymer electrolytes is caused by the segmental motion of the polymer, and in the case of polyethylene oxide with high molecular weight, this movement is restricted due to high crystallinity, thus ionic conductivity rate reduction

Method used

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  • Solid polymer electrolyte and method for producing same
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  • Solid polymer electrolyte and method for producing same

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Embodiment approach

[0113] Hereinafter, the present invention will be described in detail through specific examples. However, the descriptions provided herein are only preferred examples for the purpose of illustration and are not intended to limit the scope of the present invention, so it should be understood that these examples are provided to provide a clearer explanation to those skilled in the art.

Embodiment 1

[0116] 35 g of a polymer represented by Formula 1 with a weight average molecular weight of 100,000 (the molar ratio of n:m is 20:1), 55 g of lithium lanthanum zirconium oxide (Li 7 La 3 Zr 2 o 12 ; LLZO), and 10 g lithium salt (LiTFSI) were dissolved in acetonitrile. Thereto was added 0.7 g of methyl benzoylformate as a polymerization initiator to prepare a composition for a polymer electrolyte having a solid content of 40%.

[0117] Subsequently, a membrane was coated with the composition for a polymer electrolyte, and then the composition was vaporized at 40° C. to form a membrane, and then irradiated with ultraviolet rays to prepare a solid polymer electrolyte membrane having a thickness of 30 μm.

Embodiment 2

[0119] Prepare a solid polymer electrolyte membrane in the same manner as in Example 1, except that instead of LLZO, lithium germanium aluminum phosphate (Li 1.3 al 0.3 Ge 1.7 (PO 4 ) 3 ; LAGP) for mixing.

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Abstract

The present invention relates to a solid polymer electrolyte formed of a polymer matrix including a lithium ion conductor, and a method of preparing the same. The solid polymer electrolyte of the present invention can be molded in the form of a film and used in an electrochemical device such as a lithium polymer secondary battery or the like.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the benefit and priority of Korean Patent Application No. 10-2016-0038570 filed on March 30, 2016, the disclosure of which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to a solid polymer electrolyte and a preparation method thereof, and in particular, to a solid polymer electrolyte formed of a polymer matrix including a lithium ion conductor and a preparation method thereof. Background technique [0004] Much research is underway focusing on alternative energy sources and alternative power sources, ie, methods of producing electrochemical energy that can cope with escalating energy consumption and convert it into more environmentally friendly consumption. Much research has been conducted on lithium secondary batteries, which are known to have the best electrochemical energy discharge performance. [0005] Among...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/056H01M10/0565H01M10/0562H01M10/0568H01M10/0525
CPCH01M10/0525H01M10/056H01M2300/0085H01M2300/0091H01M10/0565Y02E60/10H01M10/0562H01M10/0568H01M2300/0071H01M2300/0082
Inventor 安庆昊朴卛智李哲行吴正友李正勳郑理珍
Owner LG ENERGY SOLUTION LTD
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