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

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Problems solved by technology

[0004] In order to solve the problems of too few types of flexible zinc-based

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
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Example Embodiment

[0031] Example 1

[0032] Under 25 ° C, 10 g of sodium alginate was completely dissolved in 100 ml of deionized water. Then, 5 ml of tetraeth ester, 5 ml of propalkyl alcohol was sequentially added, and the hydrochloric acid solution was added, and the pH of 6 was adjusted, 0.5 h was adjusted to obtain a mixture of 0.5 hours under 80 ° C, and the injection thickness was 2 mm polytetrafluoroethylene. In the mold, it is allowed to stand for 2 hours at room temperature to obtain alginate - polysilicate hydrogel, and standby. 5 g of zinc sulfate, 2 g of lithium chloride was dissolved in 50 ml of deionized water to give hydrophilic fluid, and for use. Under 30 ° C, the deposited alginate-polysilic acid hydrogel was immersed in the above-formulated hydrophilic fluid 0.2 h, and finally gave the gel electrolyte.

Example Embodiment

[0033] Example 2

[0034] 5 g of sodium 5g alginate was completely dissolved in 100 ml of deionized water at 45 ° C. Then, sequentially add 5 ml of tetraeth ester, 5 mL of propylene glycol, drippaged hydrochloric acid solution, and adjusted pH of 3, and reacting at 80 ° C for 1 h to obtain a mixture, and injected a thickness of 2 mm polytetrafluoride mold. In room temperature for 6 hours, it was allowed to obtain alginate - polysilicate hydrogel, and it was for use. 10 g of zinc sulfate, 2 g of lithium chloride was dissolved in 50 ml of deionized water to give a hydropower solution to be used. Under 45 ° C, the standing alginate-polysilic acid hydrogel was immersed in the above-formulated hydrophilic fluid 0.5 h, and finally obtained gel electrolyte.

Example Embodiment

[0035] Example 3

[0036] At 65 ° C, 2G alginate was completely dissolved in 100 ml of deionized water. Then additionally 15 ml of tetraeth ester, 10 mL of propylene glycol, dripped the hydrochloric acid solution was added in sequence, and the pH is 4, and the reaction was reacted at 60 ° C to obtain a uniform mixture, and the thickness of 2 mm is 2 mm. Polytetrafluoride mold In the room temperature, it allows for 12 hours to obtain alginate - polysilicate hydrogel, and is for use. 10 g of zinc sulfate, 4 g lithium sulfate was dissolved in 50 ml of deionized water to give a hydrophilic solution to be used. Under 50 ° C, the deposited alginate-polysilic acid hydrogel was immersed in the above-formulated hydrophilic solution for 1 h, and finally gave 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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