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Gel polymer electrolyte and secondary battery comprising the same

A gel polymer and secondary battery technology, which is applied in the direction of non-aqueous electrolyte batteries, secondary batteries, electrolyte immobilization/gelation, etc., can solve the problems of reduced mobility and electrochemical properties, and achieve improved ion Effects of conductivity, leakage prevention, and ease of application

Inactive Publication Date: 2016-12-28
KOREA INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the gel polymer electrolyte matrix itself is limited in that it contains simple polymer
In addition, sodium cations, which are larger in size than lithium cations, experience reduced mobility in the matrix, thereby causing a problem of reduced electrochemical properties

Method used

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  • Gel polymer electrolyte and secondary battery comprising the same
  • Gel polymer electrolyte and secondary battery comprising the same
  • Gel polymer electrolyte and secondary battery comprising the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] (1) Preparation of mixed solution

[0071] To 100 parts by weight of acetone as a solvent, 15 parts by weight of a solid mixture containing poly(sodium 4-styrene sulfonate) and poly(vinylidene fluoride-co-hexafluoropropylene) (KYNAR2801, Arkema) and 15 parts by weight of dibutyl phthalate, and then the resulting mixture was subjected to ball milling for 12 hours to obtain a homogeneous mixed solution. The solid mixture contained 10% by weight of poly(sodium 4-styrene sulfonate) and 90% by weight of poly(vinylidene fluoride-co-hexafluoropropylene).

[0072] (2) Production of polymer films

[0073] Twenty hours after the preparation of the mixed solution, the mixed solution was cast on a glass substrate to a thickness of 500 μm by using a doctor blade and allowed to stand at room temperature for 1 hour to obtain a polymer film.

[0074] (3) Production of porous polymer membranes

[0075] The polymer film obtained above was immersed in methanol for at least 12 hours to ...

Embodiment 2

[0079] A gel polymer electrolyte was obtained in the same manner as in Example 1, except that poly(vinylidene fluoride-co-hexa) containing 20% ​​by weight of poly(sodium 4-styrene sulfonate) and 80% by weight of poly(vinylidene fluoride-co-hexa) was used A solid mixture of fluoropropylene) was used instead of a solid mixture comprising 10% by weight of poly(sodium 4-styrene sulfonate) and 90% by weight of poly(vinylidene fluoride-co-hexafluoropropylene).

Embodiment 3

[0081] A gel polymer electrolyte was obtained in the same manner as in Example 1, except that 30% by weight of poly(sodium 4-styrene sulfonate) and 70% by weight of poly(vinylidene fluoride-co-hexa) were used A solid mixture of fluoropropylene) was used instead of a solid mixture comprising 10% by weight of poly(sodium 4-styrene sulfonate) and 90% by weight of poly(vinylidene fluoride-co-hexafluoropropylene).

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Abstract

Provided are a gel polymer electrolyte and a secondary battery including the same. More particularly, the gel polymer electrolyte includes a sodium cation-containing polymer from which sodium cations can be dissociated, and thus provides improved ion conductivity of sodium cations, thereby improving the electrochemical properties of a secondary battery.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims priority under 35 USC Section 119 to Korean Patent Application No. 10-2015-0087382 filed in the Korean Intellectual Property Office on Jun. 19, 2015, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The following disclosure relates to gel polymer electrolytes applicable to secondary batteries and secondary batteries including the same. Background technique [0004] In recent years, lithium secondary batteries are commercially available and used as energy storage devices for large-capacity automobiles and power storage systems for small electronic instruments. Under these circumstances, there is a growing demand for research into new next-generation batteries in order to address issues including the high cost of lithium, which is essential for lithium secondary batteries, and concerns about the international situation caused by the localization ...

Claims

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Application Information

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IPC IPC(8): H01M10/0565
CPCH01M10/0565H01M10/052H01M2300/0085Y02E60/10
Inventor 郑暻胤郑燻基张元英赵炳源崔原彰吴是衡李尹圣苏桑托·迪基金东元申元暻
Owner KOREA INST OF SCI & TECH
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