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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.) can only be used in organic systems due to their violent reactions with water.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

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

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

Embodiment 2

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

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

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

[0034] Prepare the mixed solution according to the following ratio, stir it evenly, and use it as the polymer electrolyte precursor solution.

[0035] Acrylic: 12.5%

[0036] Crosslinking agent (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 1:1wt) solution, the hydrophilic gel electrolyte membrane will be...

Embodiment 3

[0040] Example 3 Non-aqueous / aqueous two-phase gel electrolyte membrane used in lithium-air batteries

[0041] The positive electrode of the lithium-air electrode described in this example is a double-layer air electrode with 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 assembly of the battery is to put the catalytic layer of the air electrode close to the outside of the hydrophilic gel membrane of the non-aqueous / aqueous two-phase gel electrolyte membrane, and the metal lithium sheet is embedded in the hydrophobic gel of the non-aqueous / aqueous two-phase gel electrolyte membrane. inside the membrane. The lead wires drawn from the positive and negative poles are connected to a battery tester for discharge testing.

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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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