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Foamed nickel-supported cobalt acid ferrous submicron tube electrode material and preparation method thereof

A technology for supporting ferrous cobaltate and submicron tubes, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, can solve the problem of mechanical stability being difficult to meet multiple cycles of charge and discharge, and achieve good industrial application. Prospect, easy operation, low cost effect

Active Publication Date: 2015-12-02
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, all the reports are about nano-sized structural units (such as nanoparticles, nanowires, nanotubes, etc.), the mechanical stability is difficult to meet the multiple cycle charge and discharge under high current, and the ferrous cobaltate (FeCo 2 o 4 ) The research reports on the preparation method of micro-nano materials and their use in supercapacitors involve few

Method used

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  • Foamed nickel-supported cobalt acid ferrous submicron tube electrode material and preparation method thereof
  • Foamed nickel-supported cobalt acid ferrous submicron tube electrode material and preparation method thereof
  • Foamed nickel-supported cobalt acid ferrous submicron tube electrode material and preparation method thereof

Examples

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Embodiment 1

[0028] Submicron Tubular FeCo 2 o 4 Supercapacitor material: Dissolve 0.40g ferric nitrate nonahydrate and 0.58g cobalt nitrate hexahydrate in 50mL deionized water; put the mixed solution and nickel foam in a 250mL three-neck Erlenmeyer flask, and heat the oil bath to 80°C ; Then, after dissolving 1.51g oxalic acid in 50mL deionized water, slowly add it dropwise into the three-necked Erlenmeyer flask of the above system, under the mechanical stirring at a speed of 25-40r / min, keep the constant temperature oil bath for 2h; after the reaction is complete , cooled naturally to room temperature, took out the nickel foam loaded with the precursor, and washed it with deionized water and absolute ethanol several times; freeze-dried for 12 hours; heated to 400°C at a heating rate of 5°C / min, , constant temperature for 2h to obtain the final product.

[0029] figure 1 a is a low power SEM image of the product prepared in Example 1. The product is evenly distributed on the nickel fo...

Embodiment 2

[0033] Fe 3+ 、Co 2+ , the concentration of oxalic acid was 1.3mM, 2.5mM and 15mM respectively, and other conditions were the same as in Example 1.

Embodiment 3

[0035] Fe 3+ 、Co 2+ and the concentration of oxalic acid are respectively 5mM, 10mM and 60mM, and other conditions are identical with embodiment 1.

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Abstract

The invention discloses a novel preparation method of a foamed nickel-supported cobalt acid ferrous submicron tube material and the application of the material in the electrode of a super capacitor. Ferric nitrate, cobalt nitrate and oxalic acid are adopted as raw materials, and the tubular FeCo2O4 material grows on the surface of a foamed nickel substrate through the template-free chemical sedimentation and heat treating process. The diameter of each tube is within the range of 600 to 900 nm. Based on submicron units and a stable structure thereof on the surface of a nickel substrate, the method has an important significance on the mechanical stability. Meanwhile, a tube array is uniformly distributed on the surface of a three-dimensional substrate to form a porous structure. The electrode material can be directly applied to a capacitor without the need of any binder, so that the high capacitive performance is ensured. In addition, the preparation method is simple to operate, low in cost, easy to control and large in scale.

Description

technical field [0001] The invention relates to a preparation method of an electrode material for a supercapacitor, in particular to foamed nickel-supported ferrous cobaltate (FeCoO) with excellent electrochemical properties. 2 o 4 ) Submicron tube supercapacitor electrode material and its new preparation method. The method does not require any template, is simple to operate, low in cost, good in repeatability, and easy to control. Background technique [0002] With the rapid development of electronic energy devices and hybrid vehicles, batteries and traditional capacitors can no longer meet their needs. Due to the advantages of high power density, fast charge and discharge, and long cycle life, supercapacitors have attracted close attention from the scientific research community and the industry. According to electrode materials, supercapacitors include electric double layer capacitors with carbon materials as electrodes and pseudocapacitive capacitors with metal oxides ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/30
Inventor 唐少春朱保刚谢浩
Owner NANJING UNIV
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