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Gel electrolyte of zinc-based battery and preparation and application thereof

A gel electrolyte and zinc-based battery technology, applied in the field of electrochemical energy storage, can solve the problems of low mechanical strength, complex preparation process, and few types of flexible zinc-based gel electrolytes, and achieve high mechanical strength, simple preparation process, low cost effect

Pending Publication Date: 2021-03-16
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of too few types of flexible zinc-based gel electrolytes, low mechanical strength and complicated preparation process

Method used

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  • Gel electrolyte of zinc-based battery and preparation and application thereof
  • Gel electrolyte of zinc-based battery and preparation and application thereof
  • Gel electrolyte of zinc-based battery and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Under the condition of 25°C, 10 g of sodium alginate was completely dissolved in 100 mL of deionized water. Then add 5ml tetraethyl silicate and 5ml glycerol in sequence, add hydrochloric acid solution dropwise, adjust the pH to 6, react at 80°C for 0.5h to obtain a uniform mixture, and inject polytetrafluoroethylene with a thickness of 2mm In the mold, stand at room temperature for 2 hours to obtain alginic acid-polysilicate hydrogel, which is ready for use. Dissolve 5g of zinc sulfate and 2g of lithium chloride in 50mL of deionized water to obtain an aqueous electrolyte solution for use. Under the condition of 30° C., the alginic acid-polysilicate hydrogel after standing was immersed in the water electrolyte solution prepared above for 0.2 h, and finally a gel electrolyte was obtained.

Embodiment 2

[0034] Under the condition of 45°C, 5 g of sodium alginate was completely dissolved in 100 mL of deionized water. Then add 5ml tetraethyl silicate and 5ml glycerol in sequence, add hydrochloric acid solution dropwise, adjust the pH to 3, react at 80°C for 1h to obtain a uniform mixture, inject it into a polytetrafluoroethylene mold with a thickness of 2mm , standing at room temperature for 6 hours to obtain alginic acid-polysilicic acid hydrogel, ready to use. Dissolve 10g of zinc sulfate and 2g of lithium chloride in 50mL of deionized water to obtain an aqueous electrolyte solution for use. Under the condition of 45° C., the alginic acid-polysilicate hydrogel after standing was immersed in the above-prepared water electrolyte for 0.5 h to finally obtain a gel electrolyte.

Embodiment 3

[0036] Under the condition of 65°C, 2 g of sodium alginate was completely dissolved in 100 mL of deionized water. Then add 15ml of tetraethyl silicate and 10ml of glycerol in sequence, add hydrochloric acid solution dropwise, adjust the pH to 4, react at 60°C for 1h to obtain a uniform mixture, and inject it into a polytetrafluoroethylene mold with a thickness of 2mm , standing at room temperature for 12 hours to obtain alginic acid-polysilicate hydrogel, which is ready for use. Dissolve 10g of zinc sulfate and 4g of lithium sulfate in 50mL of deionized water to obtain an aqueous electrolyte solution for use. Under the condition of 50° C., the alginic acid-polysilicate hydrogel after standing was immersed in the above-prepared water electrolyte for 1 hour to finally obtain a gel electrolyte.

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Abstract

The invention discloses a gel electrolyte of a zinc-based battery and preparation and application thereof. The invention aims to improve the mechanical strength and the ionic conductivity of the gel electrolyte through the synergistic effect of the sodium alginate and the tetraethyl silicate hydrolysate. The preparation method comprises the following steps: (1) dissolving sodium alginate in waterunder a heating condition, sequentially adding tetraethyl orthosilicate, glycerol and an acid solution, adjusting the pH value, stirring for dissolving, and carrying out a reaction for a certain timeat a certain temperature to obtain a uniform mixture; (2) injecting the obtained mixture into a polytetrafluoroethylene mold, and standing for a certain time at room temperature to obtain alginic acidpolysilicic acid hydrogel; (3) dissolving a zinc salt and a lithium salt into water to obtain a water electrolyte; and (4) immersing the hydrogel obtained by standing into a water electrolyte, and obtaining the gel electrolyte at a certain temperature after a certain period of time. According to the invention, the problems of few types of solid gel electrolytes, complex preparation process, low ionic conductivity and low mechanical strength in the prior art are overcome.

Description

technical field [0001] The invention relates to a high-strength, high-ionic-conductivity gel electrolyte and its preparation method and application, in particular to a zinc-based battery gel electrolyte, its preparation method and application, and the technical field of electrochemical energy storage. Background technique [0002] Lithium secondary batteries are widely used in the field of electrochemical energy storage. It has the advantages of high energy density, high working voltage, low self-discharge rate, etc., but it requires high production conditions, limited use temperature, and uses flammable and Expensive organic electrolyte. With the increasing demand for lithium metal, the content of lithium metal in the earth's crust is getting less and less, and the cost of lithium secondary batteries will become higher and higher, which limits the sustainable development of lithium secondary batteries. In order to improve battery safety and reduce costs, rechargeable hybri...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/052
CPCH01M10/0565H01M10/052H01M2300/0085Y02E60/10
Inventor 史丰炜丁阳阳钟鑫苑春妹
Owner CHANGCHUN UNIV OF TECH
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