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Porous zinc-tin alloy negative electrode material for zinc-air battery and preparation method thereof

A zinc-air battery and alloy negative electrode technology, which is applied in battery electrodes, fuel cell-type half-cells and primary battery-type half-cells, circuits, etc. control issues

Inactive Publication Date: 2018-07-27
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, since the reduction potential of tin (-0.14) is about 0.6V higher than that of zinc (-0.76), the co-deposition of tin and zinc usually results in difficult control of the deposition rate of zinc and tin, and the distribution of elements Uneven, rough coating, and even tin whiskers, etc., make the zinc-tin alloy unable to obtain the required anti-corrosion effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] First pass the nickel foam with a tab area of ​​4×5cm on the short side with a copper-plastic wire with a copper diameter of 2.5mm, and solder it firmly with solder, cover the solder joint with epoxy resin, and let it solidify overnight. It is used as a cathode after degreasing and deoxidizing layer. After polishing the high-purity zinc sheet with a specification of 3×6×0.3cm with sandpaper, drill a hole on the side and pass it through with a copper wire and weld it firmly. After cleaning, it is used as an anode. Immerse the treated foam nickel cathode and zinc sheet anode in the electroplating solution, the volume of the electroplating solution is 500mL, wherein the zinc pyrophosphate (Zn 2 P 2 o 7 ), stannous pyrophosphate (Sn 2 P 2 o 7 ), potassium pyrophosphate (K 4 P 2 o 7 ), the gelatin of concentration 3g / L. The temperature of the solution was controlled at 55° C., and the pH value of the solution was 9.5. The distance between the two poles is 3cm, and ...

Embodiment 2

[0042] First pass the nickel foam with a tab area of ​​4×6cm on the short side with a copper-plastic wire with a copper diameter of 2.5mm, and solder it firmly with solder, cover the solder joint with epoxy resin, and let it solidify overnight. It is used as a cathode after degreasing and deoxidizing layer. After polishing the high-purity zinc sheet with a specification of 4×10×0.3cm with sandpaper, drill a hole on the side and pass it through with a copper wire and weld it firmly. After cleaning, it can be used as an anode. Immerse the treated foam nickel cathode and zinc sheet anode in the electroplating solution, the volume of the electroplating solution is 400mL, wherein zinc sulfate (ZnSO4) with a concentration of 20g / L is added. 4 ·7H 2 O), tin sulfate (SnSO 4 ), concentration of 140g / L sodium gluconate (C 6 h 11 o 7 Na), sodium sulfate (NaSO 4 ). The temperature of the solution was controlled at 25° C., and the pH value was 5. The distance between the two poles ...

Embodiment 3

[0045] First pass the nickel foam with a tab area of ​​4×7cm on the short side with a copper-plastic wire with a copper diameter of 2.5mm, and solder it firmly with solder, cover the solder joint with epoxy resin, and let it solidify overnight. It is used as a cathode after degreasing and deoxidizing layer. After polishing the high-purity zinc sheet with a specification of 5×8×0.3cm with sandpaper, drill a hole on the side and pass it through with a copper wire and weld it firmly, and use it as an anode after cleaning. Immerse the treated foam nickel cathode and zinc sheet anode in the electroplating solution, the volume of the electroplating solution is 500mL, wherein zinc sulfate (ZnSO4) with a concentration of 50g / L is added 4 ·7H 2 O), the stannous chloride (SnCl) of concentration 5g / L 2 ), citric acid with a concentration of 110g / L (C 6 h 8 o 7 ), ammonium sulfate ((NH 4 ) 2 SO 4 ), the polyethylene glycol (PEG) of the molecular weight 800 of concentration 0.5g / L,...

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Abstract

The invention discloses a porous zinc-tin alloy negative electrode material for a zinc-air battery and a preparation method of the porous zinc-tin alloy negative electrode material, belonging to the field of new energy technology development. The porous zinc-tin alloy negative material comprises a foamed nickel substrate and a zinc-tin alloy plating layer, wherein the zinc-tin alloy plating layer is uniformly coated on the foamed nickel substrate, tin and zinc in the zinc-tin alloy plating layer are uniformly distributed, and the mole ratio of tin to zinc is (0.01-0.20):1. In the porous zinc-tin alloy negative electrode material, foamed nickel is taken as a negative electrode, electroplating is carried out in an electroplating liquid containing a complexing agent to obtain the porous zinc-tin alloy negative electrode material, and the electroplating liquid containing the complexing agent is selected from one of a pyrophosphate system electroplating liquid, a gluconate system electroplating liquid, a citrate system electroplating liquid and a tartaric acid system electroplating liquid. The porous zinc-tin alloy negative electrode material has the advantages that the material structure is reasonable in design, the preparation process is simple, and industrial application and production at a large scale are promoted.

Description

technical field [0001] The invention discloses a porous zinc-tin alloy negative electrode material for a zinc-air battery and a preparation method thereof, belonging to the field of new energy technology development. Background technique [0002] As a device that can store electrical energy generated by other clean energy sources and provide it to various devices, batteries have been widely used and researched. As an aqueous metal-air battery, zinc-air battery has the advantages of high specific energy, good safety, stable discharge voltage, abundant raw materials, and environmental friendliness. These problems hinder the further development and application of zinc-air batteries. [0003] As the active material of alkaline zinc-air batteries, the zinc anode directly determines the size of the battery capacity, and also has a great impact on the safety, working voltage, power efficiency, charge and discharge power, recyclability, and storage life of the battery. Zinc anodes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M12/06H01M4/90H01M4/88
CPCH01M4/88H01M4/8825H01M4/90H01M4/9041H01M12/06
Inventor 田忠良赖延清杨超张志剑郭伟昌杨凯李劼
Owner CENT SOUTH UNIV
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