Non-aqueous/aqueous two-phase gel electrolyte, preparation and battery thereof

A gel electrolyte, electrolyte technology, used in primary batteries, secondary batteries, circuits, etc.

Inactive Publication Date: 2005-10-12
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, active metals like lithium (such as magnesium, calcium, aluminum, etc.

Method used

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  • Non-aqueous/aqueous two-phase gel electrolyte, preparation and battery thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1 Preparation of non-aqueous / aqueous two-phase gel electrolyte membrane 1

[0028] First, polyvinylidene fluoride (PVDF) was dissolved in N,N-dimethylformamide (DMF) to form a 10% PVDF solution, and then 1.6 g of methyl-butylimidazolium hexafluorophosphate (BMIPF) was weighed 6 ), and added to 4 g of the above PVDF solution, mixed evenly, and dried in a vacuum drying oven at 120° C. for 12 h to obtain a hydrophobic gel electrolyte membrane.

[0029] The hydrophilic gel electrolyte membrane is prepared by mixing 8 g of 6 mol / L potassium hydroxide aqueous solution with 2 g of polyvinyl alcohol and gelling.

[0030] The non-aqueous / aqueous two-phase gel electrolyte membrane is obtained by directly pressing the hydrophobic gel electrolyte membrane and the hydrophilic gel electrolyte membrane together.

Example Embodiment

[0031] Example 2 Preparation of non-aqueous / aqueous two-phase gel electrolyte membrane 2

[0032] First, vinylidene fluoride and hexafluoropropylene copolymer (P(VDF-HFP)) were dissolved in N-methylpyrrolidone (NMP) to form a 10% P(VDF-HFP) solution, and then 0.8 g methyl -Octylpiperidine bis(trifluorosulfonyl)imide salt (PP18TFSI), added to 2g of the above P(VDF-HFP) solution, mixed well, and dried in a vacuum oven at 120°C for 12h , the hydrophobic gel electrolyte is obtained.

[0033] The hydrophilic gel electrolyte membrane is prepared by the following method:

[0034] The mixed solution was prepared in the following proportions, and after stirring uniformly, it was used as the polymer electrolyte precursor solution.

[0035] Acrylic: 12.5%

[0036] Crosslinker (N,N'-methylenebis(acrylamide)): 0.06%

[0037] KOH solution (10mol / L): 87.44%

[0038]Under stirring, 50 mg of 4% initiator (Na 2 SO 3 +K 2 S 2 O 8 1:1 wt) solution, and a hydrophilic gel electrolyte memb...

Example Embodiment

[0040] Example 3 Non-aqueous / aqueous two-phase gel electrolyte membrane for lithium-air battery

[0041] The positive electrode of the lithium-air electrode in this example is a double-layer air electrode using manganese dioxide as a catalyst, the negative electrode is a metal lithium sheet, and the electrolyte is the non-aqueous / aqueous two-phase gel electrolyte membrane described in Example 2. The battery is assembled by attaching the catalytic layer of the air electrode to the outside of the hydrophilic gel membrane of the non-aqueous / aqueous two-phase gel electrolyte membrane, and the metal lithium sheet is enclosed in the hydrophobic gel of the non-aqueous / aqueous two-phase gel electrolyte membrane. within the membrane. The leads drawn from the positive and negative electrodes are connected to the battery tester for discharge test.

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Abstract

The invention is about a gel electrolyte of nonaqueous/aqueous biphase and the battery. The principle is: the electrolyte is made up of hydrophobic gel electrolyte film which includes hydrophobic ionic liquid and hydrophobic polymer and hydrophilic gel electrolyte film which include water and hydrophilic polymer. So the product has the both merits of the nonaqueous electrolyte and the aqueous electrolyte; it can provide the base condition to the biphase electrode reaction.

Description

technical field [0001] The invention relates to a preparation method and application of a non-aqueous / aqueous two-phase gel electrolyte, belonging to the technical field of chemical power sources. Background technique [0002] With the rapid development of electronic technology and the popularization of various portable electronic products, people's demand for chemical power supplies continues to increase, and their performance requirements are also continuously improved. In this context, the development of new, high specific energy chemical power systems has become an important requirement for social development. [0003] Metal Negative reaction negative potential V vs. NHE Theoretical specific capacity mAh / g Applicable system Zn Zn+2OH. - =Zn(OH) 2 +2e -1.24 824 aqueous solution Fe al Li Mg Ca Fe+2OH. - =Fe(OH) 2 +2e Al+3OH. - =Al(OH) 3...

Claims

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Application Information

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IPC IPC(8): C08J5/12C08L27/16C08L29/04C08L33/04H01M6/00H01M10/40
CPCY02E60/122
Inventor 曹余良杨汉西冯金奎艾新平
Owner WUHAN UNIV
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