Graphene oxide modified polymer gel electrolyte and sodium metal battery

A gel electrolyte, graphene modification technology, applied in non-aqueous electrolyte batteries, electrolyte battery manufacturing, electrolytes, etc., can solve problems such as hindering ion transmission paths and unsatisfactory ionic conductivity

Inactive Publication Date: 2019-08-27
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the introduction of inorganic nanoparticles can improve the mechanical properties of polymers, the agglomeration of these non-lithium conductive nanoparticles may hinder the ion transport path, thus exhibiting unsatisfactory ion conductivity.

Method used

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  • Graphene oxide modified polymer gel electrolyte and sodium metal battery
  • Graphene oxide modified polymer gel electrolyte and sodium metal battery
  • Graphene oxide modified polymer gel electrolyte and sodium metal battery

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preparation example Construction

[0022]The sodium salt is selected from sodium hexafluorophosphate, sodium borohydride, sodium carbonate, sodium bicarbonate, sodium chloride, sodium fluoride, sodium sulfate, sodium phosphate, sodium nitrate, sodium difluorooxalate borate, sodium pyrophosphate, Sodium dodecylbenzene sulfonate, sodium lauryl sulfate, sodium citrate, sodium metaborate, sodium borate, sodium molybdate, sodium tungstate, sodium bromide, sodium nitrite, sodium iodate, sodium iodide , sodium silicate, sodium lignosulfonate, sodium oxalate, sodium aluminate, sodium methanesulfonate, sodium acetate, sodium dichromate, sodium hexafluoroarsenate, sodium tetrafluoroborate, sodium perchlorate or trifluoro One or more of sodium methanesulfonylimide. The additive is at least one of glycerin, sodium citrate, sodium polystyrene sulfonate, sodium iminosuccinate and polyethylene glycol. The non-aqueous solvent is selected from acetone, propylene carbonate, ethylene carbonate, diethyl carbonate, dimethyl carbon...

Embodiment 1

[0026] This embodiment provides a graphene oxide modified polymer gel electrolyte made of the following components by weight: 50 parts of polyvinylidene fluoride-hexafluoropropylene, 1 part of graphene oxide, and 5 parts of sodium hexafluorophosphate , 20 parts of acetone, 0.5 parts of glycerin, and 3 parts of absolute ethanol.

[0027] The preparation method of the graphene oxide modified polymer gel electrolyte comprises the steps of: dissolving polyvinylidene fluoride-hexafluoropropylene in acetone, stirring for 3 hours, and at the same time adding graphene oxide to absolute ethanol Ultrasonic dispersion in medium for 2 hours; then pour the dissolved polyvinylidene fluoride-hexafluoropropylene and graphene oxide dispersed in ultrasound together, and add sodium hexafluorophosphate and glycerin according to the proportion, blend and stir for 3 hours; the stirring is over Finally, evenly pour the mixed jelly on a clean glass plate to level it; then immediately put it into a va...

Embodiment 2

[0030] This embodiment provides a graphene oxide modified polymer gel electrolyte, which is made of the following components by weight: 53 parts of polyvinylidene fluoride-hexafluoropropylene, 2 parts of graphene oxide, dodecylbenzenesulfonate 6.5 parts of sodium bicarbonate, 25 parts of fluoroethylene carbonate, 1.5 parts of sodium polystyrene sulfonate, and 4 parts of absolute ethanol.

[0031] The preparation method of the graphene oxide modified polymer gel electrolyte comprises the steps of: dissolving polyvinylidene fluoride-hexafluoropropylene in fluoroethylene carbonate, stirring for 3.5 hours, and at the same time adding graphene oxide Ultrasonic dispersion in absolute ethanol for 2.3 hours; then pour the dissolved polyvinylidene fluoride-hexafluoropropylene and ultrasonically dispersed graphene oxide together, and add sodium dodecylbenzenesulfonate and polyphenylene sulfonate according to the proportion Sodium ethylene sulfonate, blended and stirred for 3.5 hours; af...

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Abstract

The invention discloses a graphene oxide modified polymer gel electrolyte and a sodium metal battery; the graphene oxide modified polymer gel electrolyte is prepared from the following components in parts by weight: 50-60 parts of polyvinylidene fluoride-hexafluoropropylene, 1-5 parts of graphene oxide, 5-10 parts of sodium salt, 20-40 parts of non-aqueous solvent, 0.5-5 parts of additive and 3-6parts of absolute ethyl alcohol. The invention also discloses the sodium metal battery applying the graphene oxide modified polymer gel electrolyte. The gel electrolyte disclosed by the invention hasrelatively high ionic conductivity and excellent mechanical property, and by introducing the graphene oxide, the ionic conductivity can be improved and the mechanical property of a membrane can be improved; and sodium is uniformly deposited in a sodium metal full-battery, the compatibility with an electrode is high, and the high reversible capacity and high coulombic efficiency can be achieved.

Description

technical field [0001] The invention belongs to the technical field of gel electrolytes, and relates to a sodium metal battery element, more specifically, to a graphene oxide modified polymer gel electrolyte and a sodium metal battery using the electrolyte. Background technique [0002] The sodium metal anode has a high specific capacity (1166mA h g -1 ), is a high energy density battery (for example: Na-O 2 , one of the important components of Na-S battery). However, there are many safety concerns about using metallic sodium as the negative electrode in batteries, especially with respect to the electrolyte. Electrolyte is an important part of the battery, it is mainly divided into liquid electrolyte, solid electrolyte and gel electrolyte. Although the liquid electrolyte has high ionic conductivity, during the charging and discharging process, due to the uneven deposition of sodium dendrites, the further growth of dendrites may pierce the separator, eventually leading to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/054H01M10/058
CPCH01M10/054H01M10/0565H01M10/058H01M2300/0085H01M2300/0091Y02E60/10Y02P70/50
Inventor 陈煜罗成招
Owner SUZHOU UNIV
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