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Preparation method of self-supporting nanometer flake CoFeB supercapacitor electrode materials

A technology of supercapacitor and nanosheet, which is applied in the direction of hybrid capacitor electrode, hybrid/electric double layer capacitor manufacturing, nanotechnology, etc., can solve the problems that cannot meet the requirements, and achieve short reaction time, good conductivity, and good combination Effect

Inactive Publication Date: 2019-01-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few reports on the application of transition metal borides in the field of supercapacitors
In addition, most researchers prepare boride powders through common methods, which cannot meet the requirements of electronic materials for wearable and flexible devices
Based on the above considerations, there are still great challenges in how to easily and massively prepare transition metal boride electrode materials with low value and high performance.

Method used

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  • Preparation method of self-supporting nanometer flake CoFeB supercapacitor electrode materials
  • Preparation method of self-supporting nanometer flake CoFeB supercapacitor electrode materials
  • Preparation method of self-supporting nanometer flake CoFeB supercapacitor electrode materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Acid-treated nickel foam: use 0.5mm thick nickel foam, figure 2 It is the SEM image of the nickel foam substrate used in the present invention, and it is cut into 1 * 2cm 2 size; then the nickel foam is immersed in 0.5M hydrochloric acid solution, and processed at room temperature for 30 minutes, after the end, the nickel foam is cleaned with deionized water and alcohol successively for 15 minutes, then put into a vacuum drying oven and dried for 2 hours to obtain Honeycomb nickel foam on the surface. like figure 1 Shown is the macroscopic photo of the nickel foam substrate after acid treatment.

[0035] (2) Weigh 1.616g of ferric nitrate nonahydrate and 0.582g of cobalt nitrate hexahydrate into 100mL of water and stir thoroughly to obtain a uniformly mixed aqueous solution, which is designated as solution A.

[0036] (3) Weigh 0.946g of sodium borohydride and put it into 50mL of water and stir fully to obtain an aqueous solution of sodium borohydride, which is ...

Embodiment 2

[0045] The difference from Example 1 is: (1) the concentration of hydrochloric acid is 3M, and the treatment time is 15 minutes; (2) the preparation of nano flake cobalt iron boride. Weigh 1.212g of ferric nitrate nonahydrate and 0.873g of cobalt nitrate hexahydrate into 100mL of water and stir well to obtain a uniformly mixed aqueous solution, which is designated as solution A. Then weigh 0.757g of sodium borohydride and put it into 50mL of water and stir fully to obtain an aqueous solution of sodium borohydride, which is referred to as solution B. (4) above stirring speed is 500 revs per minute, dry 60 degree 8 hours in freeze-drying oven, all the other are the same as embodiment 1, repeat no more here.

[0046] The prepared nano-flaky cobalt-iron-boride material is similar in morphology and structure to that obtained in Example 1.

Embodiment 3

[0048] The difference from Example 1 is: (1) the concentration of hydrochloric acid is 10M, and the treatment time is 15 minutes; (2) the preparation of nano flake cobalt iron boride material. Weigh 0.808g of ferric nitrate nonahydrate and 1.164g of cobalt nitrate hexahydrate into 100mL of water and stir thoroughly to obtain a uniformly mixed aqueous solution, which is designated as solution A. Then weigh 0.946g of sodium borohydride and put it into 50mL of water and stir fully to obtain an aqueous solution of sodium borohydride, which is referred to as solution B. (4) above stirring speed is 300 revs per minute, dry 60 degree 8 hours in freeze-drying oven, all the other are the same as embodiment 1, repeat no more here.

[0049] The prepared nano-flaky cobalt-iron-boride material is similar in morphology and structure to that obtained in Example 1.

[0050] image 3 It is a macroscopic photo of the prepared nano-flaky cobalt iron boride;

[0051] Figure 5 It is the XRD s...

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Abstract

The present invention discloses a preparation method of self-supporting nanometer flake CoFeB supercapacitor electrode materials. Ferric nitrate, cobalt nitrate and sodium borohydride are main raw materials, and supercapacitor electrode materials are prepared through adoption of a chemical reduction method. The preparation method mainly comprises the steps of: performing acid treating of nickel foam, preparing nanometer flake ferrocobalt boride, and finally, testing the supercapacitor performances of the nanometer flake ferrocobalt boride materials. The three-electrode test of the supercapacitor performances of the nanometer flake ferrocobalt boride materials is performed in 6M KOH aqueous solution, wherein a platinum net and an Ag / AgCl electrode are respectively taken as a counter electrode and a reference electrode. The method performs acid treating of nickel foam and directly grows the ferrocobalt boride at the surface of the nickel foam to reduce the tedious coating process, takesthe nickel foam matrix as a conductive collective to be easier for electron transmission so as to improve the conductivity, and the obtained ferrocobalt boride is an extra-thin nanometer flake structure to facilitate contact of the active materials and the electrolyte so as to improve the electrochemical performance and have a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of application of transition metal boride materials, and relates to a preparation method of a transition metal boride electrode material and its application in supercapacitors, in particular to a self-supporting nano-sheet iron-cobalt-boron supercapacitor electrode material Preparation. Background technique [0002] In today's world, environmental pollution is becoming more and more serious, which has led to an urgent need for renewable and sustainable energy. Due to the fast charging ability, high power density and extremely long cycle life of supercapacitors, it has received great attention at present. However, the low energy density compared with lithium-ion batteries is difficult to meet the needs of new devices. According to the equation E=1 / 2CV 2 At present, there are mainly two ways to increase the energy density. One is to increase the voltage window by constructing an asymmetric supercapacitor, t...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/30H01G11/24B82Y30/00
CPCB82Y30/00H01G11/24H01G11/30H01G11/86Y02E60/13
Inventor 朱胜利孟庆卓崔振铎杨贤金梁砚琴
Owner TIANJIN UNIV
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