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Nano-composite air electrode catalyst for zinc-air battery and preparation method of nano-composite air electrode catalyst

A zinc-air battery, nano-composite technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as expensive cost, harsh use environment, restrictions, etc., achieve improved wetting performance, simple preparation process, and overcome the preparation process. complex effects

Inactive Publication Date: 2015-09-09
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the high cost of platinum, palladium and other metals, and the harsh use environment also limit the road to further civilian, industrial, and large-scale development

Method used

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  • Nano-composite air electrode catalyst for zinc-air battery and preparation method of nano-composite air electrode catalyst
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  • Nano-composite air electrode catalyst for zinc-air battery and preparation method of nano-composite air electrode catalyst

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Experimental program
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preparation example Construction

[0032] The preparation method of the nanocomposite air electrode catalyst that the present invention proposes for zinc-air battery comprises the following steps:

[0033](1) Put 0-10g of carbon nanotubes into 200-500mL of acetone solution for ultrasonic cleaning for 120-180min, then put the cleaned carbon nanotubes into 500-1000mL of deionized water for ultrasonic cleaning for 120-180min, and finally wash the put the carbon nanotubes into 500-1000mL of absolute ethanol and ultrasonically clean them for 120-180min, obtain modified carbon nanotubes after filtration, dry the modified carbon nanotubes at a constant temperature of 80-150°C for 6-15h, and dry the The loose modified carbon nanotubes are screened, and the particle size range of the modified carbon nanotubes is selected to be 35 μm to 150 μm, preferably 75 μm to 150 μm, and set aside;

[0034] (2) Put 17.5-27.5g carbon material into 500-1000mL acetone solution and ultrasonically clean it for 60-150min, then put the cle...

Embodiment 1

[0041] Put 10g of carbon nanotubes in 400mL of acetone solution for ultrasonic cleaning for 180min, then put the cleaned carbon nanotubes in 800mL of deionized water for ultrasonic cleaning for 180min, and finally put the cleaned carbon nanotubes in 800mL of absolute ethanol for ultrasonic cleaning After 180 minutes, the modified carbon nanotubes were obtained after filtration. The modified carbon nanotubes were dried at a constant temperature of 140°C for 7 hours, and the dry and loose modified carbon nanotubes were screened to select the particle size range of the modified carbon nanotubes. 75 μm ~ 150 μm, set aside; then take 10g graphene and 10g Super S carbon black in 800mL acetone solution for ultrasonic cleaning for 150min, then put the cleaned graphene and Super S carbon black into 1500mL deionized water for ultrasonic cleaning Clean for 150min, finally put the cleaned graphene and Super S type carbon black into 1500mL absolute ethanol and ultrasonically clean for 150mi...

Embodiment 2

[0044] Put 10g of carbon nanotubes into 300mL of acetone solution for ultrasonic cleaning for 120min, then put the cleaned carbon nanotubes into 700mL of deionized water for ultrasonic cleaning for 120min, and finally put the cleaned carbon nanotubes into 700mL of absolute ethanol for ultrasonic cleaning After filtering for 120 minutes to obtain modified carbon nanotubes, dry the modified carbon nanotubes at a constant temperature of 100°C for 10 hours, sieve the dry and loose modified carbon nanotubes, and select the particle size range of the modified carbon nanotubes 75 μm ~ 150 μm, set aside; then take 10 g of activated carbon and 13 g of acetylene black in 600 mL of acetone solution for ultrasonic cleaning for 90 min, then put the cleaned activated carbon and acetylene black into 1800 mL of deionized water for ultrasonic cleaning for 90 min, and finally put the cleaned Activated carbon and acetylene black were ultrasonically cleaned in 1800mL of absolute ethanol for 90 min...

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Abstract

The invention relates to a nano-composite air electrode catalyst for a zinc-air battery and a preparation method of the nano-composite catalyst, belonging to the technical field of zinc-air batteries. The nano-composite catalyst is composed of manganese dioxide, nano-silver, a carbon nano tube and a carbon material in the mass ratio of (0-0.5) to (0-0.5) to 1 to (1.75-2.75), wherein the mass of manganese dioxide and the mass of nano-silver cannot be zero at the same time. Due to the addition of nanometer materials such as nano-silver and the carbon nano tube, the wettability of the nano-composite catalyst is improved, and the reduction reaction of oxygen in a three-phase boundary formed by electrolyte, catalyst material and oxygen is facilitated; meanwhile, the composite catalyst formed by manganese dioxide and nano-silver has oxygen reduction effect higher than that of a single catalyst. The nano-composite catalyst adopts the preparation technology comprising the steps of pretreatment, granulation, ultrasonic dispersion and ball-milling treatment, the operation is simple and efficient, and the application prospect is good.

Description

technical field [0001] The invention relates to a nanocomposite air electrode catalyst for zinc-air batteries and a preparation method thereof, belonging to the technical field of zinc-air batteries. Background technique [0002] A zinc-air battery is a metal-air battery that uses oxygen in the air as the cathode and zinc as the anode, also known as a zinc-oxygen battery. Theoretically speaking, as long as there is enough zinc and electrolyte, the zinc-air battery can work continuously without being affected by the volume of the battery. Zinc-air batteries have attracted extensive attention from researchers because of their high specific energy (theoretical specific energy reaches 1350Wh / kg), stable working voltage, good safety, environmental friendliness, and cheap raw materials. [0003] Among them, as the cathode material of the core component of the zinc-air battery, whether its wettability, oxygen reduction, corrosion resistance, compatibility and other comprehensive p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88
CPCH01M4/8825H01M4/9016H01M4/9083Y02E60/50
Inventor 李双寿张琦
Owner TSINGHUA UNIV
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