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Polyanion zinc salt hydrogel electrolyte and zinc battery system

A gel electrolyte, polyanion technology, applied in aqueous electrolyte batteries, electrolyte immobilization/gelation, secondary batteries, etc., can solve problems such as inhibition, zinc dendrites and side reactions, and achieve low cost and easy raw materials. the effect of high ionic conductivity

Pending Publication Date: 2022-03-18
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a polyanionic zinc hydrogel electrolyte and zinc battery system, which solves the suppression problem of zinc dendrites and side reactions in the above-mentioned background technology

Method used

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  • Polyanion zinc salt hydrogel electrolyte and zinc battery system
  • Polyanion zinc salt hydrogel electrolyte and zinc battery system
  • Polyanion zinc salt hydrogel electrolyte and zinc battery system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this embodiment, a polyanionic zinc hydrogel electrolyte is prepared as follows:

[0025] Under the condition of 30°C, 13.6g AMPS was completely dissolved in 80mL deionized water. Then add 5g of zinc carbonate, dissolve evenly, and set aside. Dissolve 0.5g of divinylbenzene and diisocyanate, 0.1g of ketoglutaric acid in 80mL of deionized water, and irradiate with gamma rays for 1 hour to obtain polyanionic zinc hydrogel electrolyte.

[0026] In the present embodiment, adopt AMPS as organic monomer, AMPS (structural formula ) in the sulfonic acid group is substituted by the zinc ion in the zinc carbonate, and the organic acid zinc salt monomer with double bond is prepared, and its structural formula is as follows:

[0027] The polymer formed after the polymerization of the organic acid zinc salt monomer with a double bond has an anionic chain on the polymer skeleton, which plays a confinement effect on zinc ions, and at the same time restricts the free movement o...

Embodiment 2

[0031] The difference between embodiment 2 and embodiment 1 is:

[0032] At 80°C, 10 g of AMPS was completely dissolved in 100 mL of deionized water. Then add 5.26g of zinc chloride, dissolve evenly, and set aside. Dissolve 5 g of boric acid, 5.26 g of zinc chloride, and 0.1 g of azobisisobutyronitrile in 100 mL of deionized water, and heat at 100° C. for 2 h to obtain a polyanionic zinc hydrogel electrolyte.

[0033] A zinc-air battery was assembled by combining the polyanionic zinc hydrogel electrolyte of this example with zinc foil and an air positive electrode. The resulting zinc-air battery can achieve 1000 charge-discharge cycles, and the discharge platform is maintained at about 1.5V.

Embodiment 3

[0035] The difference between embodiment 3 and embodiment 1 is:

[0036] At 70°C, 7.6g of AMPS was completely dissolved in 20mL of deionized water. Then add 3g of zinc sulfate, dissolve evenly, and set aside. 1 g of divinylbenzene was dissolved in 20 mL of deionized water, and reacted under ultraviolet light for 0.5 h to obtain a polyanionic zinc hydrogel electrolyte.

[0037] A zinc-manganese dioxide battery was assembled by combining the polyanionic zinc hydrogel electrolyte of this example with zinc foil and manganese dioxide positive electrode, and the obtained zinc-manganese dioxide battery could cycle 200 cycles at a current density of 0.1A / g, and the capacity The retention rate was 92.3%.

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Abstract

The invention discloses a polyanion zinc salt hydrogel electrolyte and a zinc battery system, the electrolyte is an organic acid zinc salt polymer, and is prepared from an organic matter monomer, a zinc salt, a cross-linking agent and an initiator through a polymerization reaction; wherein the concentration of the organic matter monomer is 0.1-10 mol / L, and the amount-of-substance concentration ratio of the organic matter monomer to the zinc salt is 0.1: 1-10: 1; the organic matter monomer contains a carbon-carbon double bond and contains at least one group of a sulfonic acid group, an imide group, a sulfonyl imide group, a carboxylic acid group and a boric acid group; the zinc salt is soluble zinc salt. According to the zinc battery system, polyanion zinc salt hydrogel electrolyte is adopted, negative ions in the electrolyte are fixed, side reactions are reduced, growth of zinc dendrites is inhibited, and the electrochemical performance and cycling stability of the zinc battery system are improved.

Description

technical field [0001] The invention belongs to the technical field of chemical power sources, and in particular relates to a polyanion zinc hydrogel electrolyte and a zinc battery system. Background technique [0002] In recent years, lithium-ion batteries (LIBs) have been widely used in portable electronics and electric vehicles due to their excellent electrochemical performance. However, safety concerns caused by flammable organic electrolytes have driven researchers to develop alternatives to LIBs. Among various next-generation energy storage systems, aqueous Zn-based batteries are considered to be the most promising candidates because of the unique advantages of Zn metal anodes, such as low redox potential (−0.76 V versus standard hydrogen electrodes), High theoretical capacity (820mAh g -1 and 5855mAh cm -3 ), good compatibility with aqueous solution, high safety and environmental friendliness. However, ZnSO 4 Severe dendrite formation and side reactions (such as ...

Claims

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Application Information

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IPC IPC(8): C08F220/58C08F212/36C08F2/48H01M10/36H01M6/04
CPCC08F220/585C08F2/48H01M10/36H01M6/04H01M2300/0085C08F212/36C08F220/58Y02E60/10
Inventor 赵金保丛建龙曾静
Owner XIAMEN UNIV
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