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Co-FPOH microsphere material for aqueous zinc-air battery and preparation method thereof

A technology of air cells and microspheres, which can be applied to fuel cell type half cells and secondary cell type half cells, battery electrodes, circuits, etc., and can solve the problems of less research and application.

Active Publication Date: 2021-07-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Transition phosphates have been widely used in photocatalysis, lithium-ion batteries, sodium-ion batteries, and supercapacitors, but there are very few studies and applications in aqueous zinc-air batteries.

Method used

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  • Co-FPOH microsphere material for aqueous zinc-air battery and preparation method thereof
  • Co-FPOH microsphere material for aqueous zinc-air battery and preparation method thereof
  • Co-FPOH microsphere material for aqueous zinc-air battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Mix 50 wt.% phytic acid and deionized water and stir for 20 min to obtain the water phase, wherein the ratio of phytic acid and deionized water is 0.60 ml : 40 ml;

[0038] (2) Mix cobalt stearate, iron stearate and toluene, and prepare a uniformly dispersed toluene solution at room temperature for over 240 minutes, which is the oil phase. The ratio of cobalt stearate, iron stearate and toluene is 0.8mmol: 1.6 mmol: 40mL;

[0039] (3) First transfer the water phase obtained in step (1) to the reactor, and then transfer the oil phase obtained in step (2) to the reactor for two-phase hydrothermal reaction of water and oil at a reaction temperature of 120 ℃ for 24 hours, cooled to room temperature, collected the final product that sank to the bottom of the water, washed with deionized water and ethanol for 3 to 5 times, dried, and ground to obtain the Co-FPOH microsphere water-based zinc-air battery material, namely Co doped Fe 5 (PO 4 ) 4 (OH) 3 •H 2 O.

[0040...

Embodiment 2

[0043] (1) Mix 50 wt.% phytic acid and deionized water and stir for 20 min to obtain the water phase, wherein the ratio of phytic acid and deionized water is 0.60 ml : 40 ml;

[0044] (2) Mix cobalt stearate, iron stearate and toluene, and prepare a uniformly dispersed toluene solution at room temperature for over 240 minutes, which is the oil phase. The ratio of cobalt stearate, iron stearate and toluene is 0.8mmol: 1.6 mmol: 40mL;

[0045] (3) First transfer the water phase obtained in step (1) to the reactor, and then transfer the oil phase obtained in step (2) to the reactor for two-phase hydrothermal reaction of water and oil at a reaction temperature of 160 ℃ for 24 hours, cooled to room temperature, collected the final product that sank to the bottom of the water, washed with deionized water and ethanol for 3 to 5 times, dried, and ground to obtain the Co-FPOH microsphere water-based zinc-air battery material, namely Co doped Fe 5 (PO 4 ) 4 (OH) 3 •H 2 O.

[0046...

Embodiment 3

[0049] ((1) Mix phytic acid with a mass fraction of 50 wt.% and deionized water, and stir for 20 min to obtain an aqueous phase, wherein the ratio of phytic acid to deionized water is 0.60 ml : 40 ml;

[0050] (2) Mix cobalt stearate, iron stearate and toluene, and prepare a uniformly dispersed toluene solution at room temperature for over 240 minutes, which is the oil phase. The ratio of cobalt stearate, iron stearate and toluene is 0.8mmol: 1.6 mmol: 40mL;

[0051] (3) First transfer the water phase obtained in step (1) to the reactor, then transfer the oil phase obtained in step (2) to the reactor, and carry out the water-oil two-phase hydrothermal reaction, the reaction temperature is 180 ℃ for 24 hours, cooled to room temperature, collected the final product that sank to the bottom of the water, washed with deionized water and ethanol for 3 to 5 times, dried, and ground to obtain the Co-FPOH microsphere water-based zinc-air battery material, namely Co doped Fe 5 (PO 4 ...

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Abstract

The invention discloses a Co-Fe5(PO4)4(OH) 3H2O(Co-FPOH) microsphere positive electrode material for an aqueous zinc-air battery and a preparation method thereof. The preparation method comprises the following steps: firstly, dissolving phytic acid in water to form a water phase, and dissolving iron stearate and cobalt stearate in methylbenzene to form an oil phase; and sequentially transferring the water phase and the oil phase into a polytetrafluoroethylene liner for hydrothermal reaction to obtain the Co-FPOH microsphere positive electrode material. The preparation method is simple to operate, does not need complex equipment and is low in cost; the prepared Co-FPOH microspheres are uniform in size, and rough porous structures are formed on the surfaces of the microspheres. In the testing process of the zinc-air battery, the discharge capacity of 817 mAh gzn<-1> and the peak power density of 167.8 Wh cm<-2> are shown; and the battery can be circulated for 2500 hours under the current density of 2 mA cm<-2>.

Description

technical field [0001] The invention relates to the field of electrode materials for water-based zinc-air batteries, in particular to a transition metal phosphate electrode material for water-based zinc-air batteries and a preparation method thereof. Background technique [0002] With the development of the economy, the living standards of the common people are constantly improving. How to improve the living environment and enhance the happiness of the common people has become the biggest livelihood issue at present. However, obtaining the necessary energy for survival is often accompanied by a large amount of pollution, which greatly affects people's vision of a high-quality life. Among them, electricity mainly comes from the conversion of fossil energy, while the "waste heat" left by thermal power plants is discharged into lakes, the atmosphere or the ocean, which is very likely to cause thermal pollution and damage the ecological environment of the region. In addition, d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88H01M12/08
CPCH01M4/9016H01M4/8803H01M4/8828H01M4/8882H01M12/08
Inventor 宋璐涛吕建国吕斌和庆钢侯阳张庆华高翔
Owner ZHEJIANG UNIV
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