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Organogel electrolyte, extremely low temperature zinc-air battery prepared from organogel electrolyte and preparation method of extremely low temperature zinc-air battery

An organic gel and air battery technology, which is applied to fuel cell type half cells and primary cell type half cells, electrical components, secondary batteries, etc., can solve problems such as inability to meet low temperature use, limited application, easy freezing, etc. , to achieve low interface resistance and ion transport resistance, stable charge-discharge cycle performance, and good low temperature tolerance

Pending Publication Date: 2022-07-08
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN114156533A discloses a kind of lithium ion battery gel electrolyte and the preparation method of lithium ion battery, used gel monomer is methoxy vinylpyridine compound, although adopt free radical polymerization method to prepare, in lithium ion battery also It shows high and low temperature adaptability, but the gel electrolyte will shrink when it encounters alkali, which cannot meet the actual needs of electrochemical devices based on alkaline electrolyte
[0005] CN103579665A discloses a high-low temperature gel lithium-ion battery and its manufacturing method. The diaphragm is coated with a gel-type diaphragm comprising polyvinylidene fluoride-hexafluoropropylene on both sides. This type of diaphragm can be soaked in an organic solvent medium, however, will fail in lye and cannot act as an ionic conductor
[0006] CN114094206A discloses a method for preparing an ion-type gel electrolyte membrane for a low-temperature water-based zinc-ion battery. The monomer polymerization is carried out in a salt solution, resulting in an unsatisfactory polymerization effect, and insufficient tensile properties and low-temperature ion conductivity. Freezes easily, limiting applications in ultra-low temperature environments
[0007] CN109010263A discloses a reversible liquid-gel conversion reverse intelligent hydrogel with super-temperature change and its preparation method. The disclosed data shows that it is liquid at an extremely low temperature of -15 to 4°C, so it cannot be used at a lower temperature. Satisfied for low temperature use, more importantly, this type of gel will fail in lye and cannot play the role of ion conductor
[0008] CN113416273A discloses a degradable, low-temperature-resistant hydrogel electrolyte and its preparation method and application. The disclosed data shows that the best low-temperature limit temperature is -42.2°C. At lower temperatures, the hydrogel electrolyte will fail and cannot Meet practical application needs

Method used

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  • Organogel electrolyte, extremely low temperature zinc-air battery prepared from organogel electrolyte and preparation method of extremely low temperature zinc-air battery
  • Organogel electrolyte, extremely low temperature zinc-air battery prepared from organogel electrolyte and preparation method of extremely low temperature zinc-air battery
  • Organogel electrolyte, extremely low temperature zinc-air battery prepared from organogel electrolyte and preparation method of extremely low temperature zinc-air battery

Examples

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reference example 1

[0112] Reference Example 1: Preparation method of nitrogen-doped graphene-anchored atomically dispersed Fe site catalyst

[0113] In 30mL graphene aqueous solution (mass concentration is 2mg·mL -1 ), add 20mg Fe(NO 3 ) 2 ·6H 2 O, at 20kHz, 240W, ultrasonically disperse for 1h, then add 300mg carbon nitride nanosheets, stir at room temperature for 2h, put 30mL of the mixed solution in a 50mL airtight hydrothermal kettle, and conduct a hydrothermal reaction at 180 ℃ for 12h, Cool, take out the black hydrogel, freeze-dry it at -25 °C for 72 h, and then place it in a tube furnace under a high-purity nitrogen atmosphere at a rate of 3 °C·min -1 The temperature was raised to 800°C, the temperature was kept for 3 hours, and the high temperature treatment was carried out, and then cooled to room temperature, and it was finished.

reference example 2

[0114] Reference Example 2: Preparation method of nitrogen-doped graphene-supported carbon-coated Fe nanoparticle catalyst

[0115] 2 mL of FeCl 3 ·6H 2 O ethanol solution (the mass concentration is 5 mg·mL -1 ) and 2 mL of CoCl 2 ·6H 2 O ethanol solution (the mass concentration is 5 mg·mL -1 ) was added to 200 mg of glucose and 1 g of carbon nitride powder, ground at a speed of 100 r / min for 30 min, and then placed in a tube furnace under a high-purity nitrogen atmosphere at a rate of 3 °C·min -1 The temperature was raised to 900°C, the temperature was kept for 2 hours, and the high temperature treatment was carried out, and then cooled to room temperature, and finished.

reference example 3

[0116] Reference Example 3: Mo-α-Co(OH) 2 the preparation method of

[0117] 27.3 mg (0.1 mmol) of molybdenum pentachloride, 249 mg (1.0 mmol) of cobalt acetate tetrahydrate and 1206 mg (9.0 mmol) of sodium oxalate were mixed and dissolved in 20 mL of ethylene glycol solvent, and stirred at room temperature at 1000 r / min for 1 h. , to obtain solution A; add 60 mg of sodium hydroxide to 10 mL of ethylene glycol solution, at room temperature, at a speed of 1000 r / min, and stir for 1 h to obtain solution B; mix solutions A and B, at room temperature, at a speed of 1000 r / min, Stir for 1 h, and then put 30 mL of the mixed solution in a 50 mL airtight polytetrafluoroethylene hydrothermal kettle for solvothermal reaction at 200 °C for 16 h, naturally cool to room temperature, wash 3 times with deionized water, centrifuge, at 60 °C, 20kPa Under vacuum drying for 24h, it is ready.

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Abstract

The invention discloses an organogel electrolyte, an extremely low temperature zinc-air battery prepared from the organogel electrolyte and a method. The organogel electrolyte mainly comprises the following components: a gel monomer, a cross-linking agent, an initiator, an organic antifreeze agent, a reinforcing agent and an alkaline electrolyte. The extremely-low-temperature zinc-air battery is sequentially composed of an air cathode, the organic gel electrolyte and a zinc anode from top to bottom, the air cathode is sequentially composed of a current collector, a waterproof breathable film and a catalyst layer from top to bottom. The invention also discloses a preparation method of the organic gel electrolyte and the extremely low temperature zinc-air battery. The organic gel electrolyte is low in freezing point temperature, good in low-temperature tolerance, rich in pore structure and high in low-temperature conductivity. The extremely-low-temperature zinc-air battery disclosed by the invention is low in interface resistance and ion transmission resistance at extremely low temperature, high in current density and power density, excellent in rate capability and stable in charge-discharge cycle performance. The method is simple, rapid, good in repeatability, low in cost and suitable for industrial production.

Description

technical field [0001] The invention relates to an electrolyte and an air battery and method for preparing it, in particular to an organic gel electrolyte and an extremely low-temperature zinc-air battery and method for preparing the same. Background technique [0002] Zinc-air batteries are based on oxygen in the air (O 2 ) as the positive active material, and the earth's abundant zinc as the negative active material is a special fuel cell, and its theoretical energy density can reach 1086Wh·kg -1 , with stable charging and discharging voltage, no pollution, low cost and so on. Quasi-solid-state zinc-air batteries require the conversion of traditional liquid electrolytes into gel electrolytes, which can meet the practical requirements of future flexible and wearable electronic devices, and have great potential for development. However, the output performance of the battery is closely related to the operating temperature, showing correlations in different seasons and regio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/06H01M10/0565
CPCH01M12/06H01M10/0565H01M2300/0085Y02E60/10
Inventor 雷永鹏王启晨
Owner CENT SOUTH UNIV
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