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Ternary cobalt-nickel selenide nano-sheet array electrode material and preparation method thereof

A technology of nanosheet arrays and electrode materials, which is applied in nanotechnology, nanotechnology, hybrid capacitor electrodes, etc., can solve the problems of ternary Ni-Co selenide synthesis and less research on electrochemical properties, and achieve high efficiency and operation Simple, Experimental Controlled Effects

Inactive Publication Date: 2018-12-14
ANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on the synthesis and electrochemical performance of ternary Ni-Co selenides.

Method used

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  • Ternary cobalt-nickel selenide nano-sheet array electrode material and preparation method thereof
  • Ternary cobalt-nickel selenide nano-sheet array electrode material and preparation method thereof
  • Ternary cobalt-nickel selenide nano-sheet array electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] ① According to the synthesis method described in CN201710932864.0, a honeycomb nickel selenide nanosheet array was synthesized, which was used as a precursor for the synthesis of ternary cobalt nickel selenide.

[0033] ② Add 0.4mmol of Co(CH 3 COO) 2 4H 2 O was added to 20mL of a mixed solvent of anisole and methanol (anisole 10mL, methanol 10mL), magnetically stirred for 30 minutes until all dissolved, and a concentration of 0.02mol dm -3 Co(CH 3 COO) 2 solution.

[0034]③ 20mL of 0.02mol dm prepared in step ② -3 Co(CH 3 COO) 2 The solution was added to a polytetrafluoroethylene liner autoclave with a volume of 30mL, and then the honeycomb nickel selenide nanosheet array precursor template prefabricated in step ① was put into it, and after being treated at 120°C for 4 hours, the reactor Cool naturally to room temperature, wash several times with absolute ethanol and deionized water, and dry in vacuum to obtain a ternary cobalt-nickel-selenide nanosheet array. ...

Embodiment 2

[0037] ① According to the synthesis method described in CN201710932864.0, a honeycomb nickel selenide nanosheet array was synthesized, which was used as a precursor for the synthesis of ternary cobalt nickel selenide.

[0038] ② Add 0.8mmol of Co(CH 3 COO) 2 4H 2 O was added to 20m of a mixed solvent of anisole and methanol (15mL of anisole, 5mL of methanol), magnetically stirred for 30 minutes until all dissolved, and a concentration of 0.04mol dm -3 Co(CH 3 COO) 2 solution.

[0039] ③ 20mL of 0.04mol dm prepared in step ② -3 Co(CH 3 COO) 2 The solution was added to a polytetrafluoroethylene liner autoclave with a volume of 30mL, and then the honeycomb nickel selenide nanosheet array precursor template prefabricated in step ① was put into it, and the reaction temperature was controlled at 120°C for 4 hours. The kettle was naturally cooled to room temperature, washed several times with absolute ethanol and deionized water, and dried in vacuum to obtain a ternary cobalt...

Embodiment 3

[0042] ① According to the synthesis method described in CN201710932864.0, a honeycomb nickel selenide nanosheet array was synthesized, which was used as a precursor for the synthesis of ternary cobalt nickel selenide.

[0043] ②Add 2.0mmol of Co(CH 3 COO) 2 4H 2 O was added to 20m of a mixed solvent of anisole and methanol (anisole 10mL, methanol 10mL), magnetically stirred for 30 minutes until all dissolved, and a concentration of 0.10mol dm -3 Co(CH 3 COO) 2 solution.

[0044] ③ 20mL of 0.10mol dm prepared in step ② -3 Co(CH 3 COO) 2 The solution was added to a polytetrafluoroethylene liner autoclave with a volume of 30mL, and then the honeycomb nickel selenide nanosheet array precursor template prefabricated in step ① was put into it, and the reaction temperature was controlled at 120°C for 4 hours. The kettle was naturally cooled to room temperature, washed several times with absolute ethanol and deionized water, and dried in vacuum to obtain a ternary cobalt-nicke...

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Abstract

The invention discloses a ternary cobalt-nickel selenide nanometer sheet array electrode material and a preparation method thereof, belonging to the technical field of electrode material preparation.It is prepared by the following method: Co (CH3COO) 2-4H2O is added into the mixed solvent of anisole and methanol, and the mixture is magnetically stirred to be completely dissolved; Co (CH_3COO) _ 2solution is adde into a high-pressure reaction kettle, and then that precursor template of the honeycomb nickel selenide nano-sheet array is put into the high-pressure reaction kettle, and the reaction temperature and time are controlled to obtain the ternary cobalt nickel selenide nano-sheet array, wherein the precursor template of the honeycomb nickel selenide nano-sheet array is adde into thehigh-pressure reaction kettle. The obtained electrode materials have excellent electrochemical properties at 1.0 Ag-1, the specific capacitance can reach 3917 F g-1, even at current densities up to 10A g-1, the specific capacitance can still reach 2150 F g-1. The cation exchange reaction is simple, no by-product, controllable, high efficiency and high purity. The material is suitable for supercapacitors.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor electrode material preparation, and in particular relates to a ternary cobalt-nickel-selenide nanosheet array electrode material and a preparation method thereof. Background technique [0002] In the current field of energy storage technology, lithium-ion batteries, fuel cells and supercapacitors are the most efficient and practical electrochemical energy conversion and storage devices. Compared with the other two energy storage systems, supercapacitors have the advantages of high power density, fast charging and discharging process, long life, low cost, environmental friendliness and safety, etc. However, to meet the growing energy demand, There is a need to ensure that supercapacitors increase their energy density without losing power density. Hybrid supercapacitors can provide higher energy density because they are composed of battery-type electrode materials (energy source) and capacit...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/26H01G11/30H01G11/86B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/24H01G11/26H01G11/30H01G11/86Y02E60/13
Inventor 杜卫民杜路路曹智程承邓德华
Owner ANYANG NORMAL UNIV
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