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

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

Example Embodiment

[0023] Example 1

[0024] In this example, a polyanionic zinc salt hydrogel electrolyte is as follows:

[0025] 13.6 g of MMPs were completely dissolved in 80 ml of deionized water under 30 ° C. Then, 5 g of zinc carbonate is added, and after dissolving, it is available. 0.5 g of divinylbenzene and diisocyanate, 0.1 g of ketoxaic acid were dissolved in 80 ml of deionized water, and gamma rays were irradiated for 1 h to give polyanionic zinc saline gel electrolyte.

[0026] In this embodiment, AMPS is employed as an organic material monomer, AMPS (structural formula The HA in sulfonic acid group is substituted by zinc ions in zinc carbonate, preparing a zinc salt monomer having a double bond, and its structural formula is as follows:

[0027] The polymer formed by the double-bonded organic acid zinc salt monomer is polymerized, and the anionic chain is on the skeleton of the polymer, and the zinc ion acts as a limiting, which limits the free movement of the anion, reduces the ne...

Example Embodiment

[0030] Example 2

[0031] Embodiment 2 The difference from Embodiment 1 is:

[0032] 10GAMPs were completely dissolved in 100 ml of deionized water under 80 ° C. Then, 5.26 g of zinc chloride is added, and after dissolving is uniform, standby. 5 g of boric acid, 5.26 g of zinc chloride, 0.1 g of azo diisobutyronitrile was dissolved in 100 ml of deionized water, and then heated at 100 ° C for 2 h to obtain a polyanionic zinc salt hydrogel electrolyte.

[0033] The present embodiment polysionic zinc salt hydrogel electrolyte and zinc foil, the air positive electrode assembles zinc air battery, the resulting zinc air battery can achieve 1000 charge and discharge cycles, and the discharge platform remains around 1.5V.

Example Embodiment

[0034] Example 3

[0035] Example 3 The difference from Embodiment 1 is:

[0036] 7.6 g of MMPs were completely dissolved in 20 ml of deionized water at 70 ° C. Then, 3 g of zinc sulfate, dissolved is uniform, and standby. 1 g of divinylbenzene was dissolved in 20 ml of deionized water, and 0.5 h was reacted under ultraviolet light to give a polyanionic zinc saline gel electrolyte.

[0037] The present embodiment polysionic zinc salt hydrogel electrolyte and zinc foil, manganese dioxide positive electrode assembles zinc-manganese dioxide cells, the resulting zinc dioxide battery can circulate 200 laps at a current density of 0.1a / g, capacity The holding rate is 92.3%.

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PUM

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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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