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White-beech-mushroom-shaped nickel selenide 2 nano-array electrode material and preparation method thereof

A technology of nickel diselenide and nano-array, which is applied in the direction of nanotechnology, nanotechnology, hybrid capacitor electrodes, etc., can solve the problems of poor conductivity, increased sheet resistance and charge transfer resistance, poor rate performance, etc., to achieve low cost, The effect of cheap raw materials and simple operation

Active Publication Date: 2019-04-26
合肥九州龙腾科技成果转化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the conductivity of transition metal compounds (such as: oxides, sulfides, hydroxides) is usually poor, which increases the sheet resistance and charge transfer resistance of the material, resulting in its large internal resistance at high current densities and poor rate performance

Method used

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  • White-beech-mushroom-shaped nickel selenide 2 nano-array electrode material and preparation method thereof
  • White-beech-mushroom-shaped nickel selenide 2 nano-array electrode material and preparation method thereof
  • White-beech-mushroom-shaped nickel selenide 2 nano-array electrode material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] ①Cut commercially available nickel foam into a size of 1×4cm, and ultrasonically treat it with 3mol / L hydrochloric acid for 30 minutes to remove surface oxides. Wash with absolute ethanol and deionized water alternately, and dry in vacuum for later use.

[0024] ② Add 0.10 mmol of Se powder to 18 mL of NaOH solution with a concentration of 0.07 mol / L, and sonicate for 10 min at room temperature. The mixed solution was transferred to a reaction kettle with a volume of 25 mL and lined with p-polyphenylene, and hydrothermally treated at 220° C. for 24 h to obtain a reaction solution with uniform concentration.

[0025] ③ After the reaction solution obtained in step ② is naturally cooled, put the pretreated nickel foam into it, and conduct hydrothermal treatment at 220° C. for 12 hours. After the reaction, the sample was naturally cooled to room temperature, washed with absolute ethanol and deionized water for several times, and then dried in vacuum to obtain the white jad...

Embodiment 2

[0028] ①Cut commercially available nickel foam into a size of 1×4cm, and ultrasonically treat it with 3mol / L hydrochloric acid for 30 minutes to remove surface oxides. Wash with absolute ethanol and deionized water alternately, and dry in vacuum for later use.

[0029] ② Add 0.12 mmol of Se powder to 18 mL of NaOH solution with a concentration of 0.1 mol / L, and sonicate for 10 min at room temperature. The mixed solution was transferred to a reaction kettle with a volume of 25 mL and lined with p-polyphenylene, and hydrothermally treated at 220° C. for 36 h to obtain a reaction solution with uniform concentration.

[0030] ③ After the reaction solution in step ② is naturally cooled, put the pretreated nickel foam into it, and heat it with water at 200°C for 24 hours. After the reaction was naturally cooled to room temperature, the sample was washed several times with absolute ethanol and deionized water, and then vacuum-dried to obtain a white jade mushroom-like nickel diselen...

Embodiment 3

[0033] ①Cut commercially available nickel foam into a size of 1×4cm, and ultrasonically treat it with 3mol / L hydrochloric acid for 30 minutes to remove surface oxides. Wash with absolute ethanol and deionized water alternately, and dry in vacuum for later use.

[0034] ② Add 0.2 mmol of Se powder to 18 mL of NaOH solution with a concentration of 0.12 mol / L, and sonicate for 10 min at room temperature. The mixed solution was transferred to a reaction kettle with a volume of 25 mL and lined with p-polyphenylene, and hydrothermally treated at 220° C. for 24 h to obtain a reaction solution with uniform concentration.

[0035] ③ After the reaction solution in step ② is naturally cooled, put the pretreated nickel foam into it, and conduct hydrothermal treatment at 200° C. for 16 hours. After the reaction was naturally cooled to room temperature, the sample was washed several times with absolute ethanol and deionized water, and then vacuum-dried to obtain a white jade mushroom-like ...

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Abstract

The invention discloses a white-beech-mushroom-shaped nickel selenide 2 nano-array electrode material and a preparation method thereof, and belongs to the technical field of supercapacitor electrode material preparation. The preparation method specifically comprises the following steps: a certain amount of selenium powder and a sodium hydroxide solution are mixed, hydro-thermal treatment is conducted in a reaction kettle with a polyphenylene liner, and thus a reaction solution is prepared; after the reaction solution is naturally cooled, pretreated foamed nickel is placed into the reaction solution for secondary hydro-thermal treatment; and the reaction temperature and time are controlled, and thus a white-beech-mushroom-shaped nickel selenide 2 nano-array can be obtained. The obtained electrode material has excellent electrochemical properties, the specific capacitance at the electric current density of 1.0 A / g can reach 2357 F / g, and the specific capacitance of the electrode materialcan still reach 1290 F / g even when the electric current density reach 5 A / g.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor electrode material preparation, and in particular relates to a white jade mushroom-shaped nickel diselenide nano-array electrode material and a preparation method thereof. Background technique [0002] Among numerous energy storage devices, supercapacitors have become one of the most promising energy storage devices due to their high power density, fast charge-discharge process, and good cycle stability. However, the practical application of supercapacitors is limited due to the lack of efficient and low-cost synthetic methods to prepare high-performance electrode materials. Therefore, many researchers are devoting themselves to developing ideal electrode materials. Among the current supercapacitor electrode materials (carbon materials, conductive polymers, and transition metal compounds), transition metal compound nanomaterials have become a research hotspot, because they can not only sto...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/30H01G11/26H01G11/24B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/24H01G11/26H01G11/30H01G11/86Y02E60/13
Inventor 杜卫民顾永攀曹智魏少红邓德华
Owner 合肥九州龙腾科技成果转化有限公司
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