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Preparation and application of ferro-nickel alloy/nitrogen-doped carbon fiber as oxygen electrocatalyst of zinc-air battery

A nitrogen-doped carbon fiber and nickel-iron alloy technology, which is applied in battery electrodes, fuel cell half-cells, primary battery half-cells, circuits, etc., can solve the problem that noble metal catalysts are expensive, catalysts cannot be catalyzed at the same time, and hinder a wide range of Application and other issues, to achieve the effect of good commercial application prospects, excellent ORR catalytic activity, and easy large-scale production

Inactive Publication Date: 2020-05-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, noble metal platinum (Pt) and ruthenium / iridium-based oxides are regarded as the best catalysts for ORR and OER, respectively. However, noble metal catalysts are expensive and resources are scarce, and a single catalyst cannot catalyze two reactions at the same time, which seriously hinders its wide application

Method used

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  • Preparation and application of ferro-nickel alloy/nitrogen-doped carbon fiber as oxygen electrocatalyst of zinc-air battery
  • Preparation and application of ferro-nickel alloy/nitrogen-doped carbon fiber as oxygen electrocatalyst of zinc-air battery
  • Preparation and application of ferro-nickel alloy/nitrogen-doped carbon fiber as oxygen electrocatalyst of zinc-air battery

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Embodiment 1

[0037] Example 1 Preparation of nickel-iron alloy / nitrogen-doped carbon fiber as oxygen electrocatalyst for zinc-air battery

[0038] (1) Rinse the discarded bamboo with deionized water, then cut it into chips with a pencil sharpener;

[0039] (2) Take 5-23.5g of potassium hydroxide and dissolve it in 70mL deionized water, stir and dissolve to form a uniform solution, the concentration of the more preferred potassium hydroxide solution is 3mol / L, and the quality taken is 11.7g;

[0040](3) Weigh 0.2-2g of bamboo chips, dissolve them in the above-mentioned potassium hydroxide solution and ultrasonicate for half an hour, then transfer them into a polytetrafluoroethylene liner for hydrothermal pretreatment, and the reaction temperature is 120-180°C , the time is 8-15h. The most preferred temperature is 150°C and the time is 12h. After the reaction is completed and the temperature is lowered to room temperature, the product is vacuum filtered to remove impurities and collected, ...

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Abstract

The invention relates to a bifunctional oxygen electrocatalyst which is formed by loading ferro-nickel alloy nanoparticles on nitrogen-doped carbon fibers. The preparation method of the bifunctional oxygen electrocatalyst comprises the steps of firstly, separating and converting a wood material into porous uniform cellulose fibers in situ; secondly, achieving adsorption of a ferro-nickel precursor; and finally, carbonizing the obtained product to obtain a target product. The invention further provides an application of the bifunctional oxygen electrocatalyst in the zinc-air battery. The synthesis method provided by the invention is simple and environment-friendly, and the product has good bifunctional catalytic activity and good practical value.

Description

technical field [0001] The invention belongs to the technical field of bifunctional oxygen electrocatalytic materials for zinc-air batteries, and relates to the preparation and application of nickel-iron alloy / nitrogen-doped carbon fibers as oxygen electrocatalysts for zinc-air batteries Background technique [0002] With the continuous depletion of traditional fossil fuels (coal, oil, natural gas) and the resulting environmental pollution problems, it is particularly important to develop clean, efficient and sustainable regenerative energy storage and conversion devices. At present, a variety of energy storage devices have attracted much attention, such as organic lithium-ion batteries, sodium-ion batteries, potassium-ion batteries, and aqueous nickel-iron batteries and supercapacitors. However, their energy density is not high enough. Therefore, looking for Alternative new energy storage devices are imminent, and metal-air batteries, especially flexible zinc-air batteries,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88H01M12/06
CPCH01M4/9041H01M4/9083H01M4/8825H01M12/06
Inventor 陈作锋牛艳丽滕雪
Owner TONGJI UNIV
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