Nise-ni3se2 three-dimensional pine-leaf-like nanomaterials and preparation methods thereof for supercapacitors

A technology of supercapacitors and nanomaterials, applied in the direction of nanotechnology for materials and surface science, hybrid/electric double layer capacitor manufacturing, hybrid capacitor electrodes, etc., can solve the problem of less research and application of supercapacitors, and achieve excellent cycle The effects of stability, high specific capacitance, and high electrochemical performance

Inactive Publication Date: 2018-12-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Transition metal selenides have been applied in catalysis, photolysis of water, and fuel-sensitized solar cells, but there are very few researches and applications in supercapacitors.

Method used

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  • Nise-ni3se2 three-dimensional pine-leaf-like nanomaterials and preparation methods thereof for supercapacitors
  • Nise-ni3se2 three-dimensional pine-leaf-like nanomaterials and preparation methods thereof for supercapacitors
  • Nise-ni3se2 three-dimensional pine-leaf-like nanomaterials and preparation methods thereof for supercapacitors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Dissolve the raw materials 1mmol nickel acetate tetrahydrate and 1mmol sodium selenite in 5mL deionized water, stir evenly at room temperature and place in a reaction kettle, then add a mixture of hydrazine hydrate and diethylenetriamine (15mL hydrazine hydrate, 20mL diethylenetriamine ethylenetriamine), then immerse the substrate into the solution in the reactor, and then place the reactor in an oven for hydrothermal synthesis reaction, the reaction temperature is 180°C, the reaction time is 14 hours, cooled to room temperature, washed , dried to obtain the final product NiSe-Ni 3 Se 2 nanomaterials.

Embodiment 2

[0033] Dissolve the raw materials 1mmol nickel acetate tetrahydrate and 1mmol sodium selenite in 5mL deionized water, stir evenly at room temperature and place in a reaction kettle, then add a mixture of hydrazine hydrate and diethylenetriamine (15mL hydrazine hydrate, 20mL diethylenetriamine ethylenetriamine), then immerse the substrate into the solution in the reactor, then place the reactor in an oven for hydrothermal synthesis reaction, the reaction temperature is 180°C, the reaction time is 12 hours, cooled to room temperature, washed , dried to obtain the final product NiSe-Ni 3 Se 2 nanomaterials.

Embodiment 3

[0035] Dissolve the raw materials 1mmol nickel acetate tetrahydrate and 1mmol sodium selenite in 5mL deionized water, stir evenly at room temperature and place in a reaction kettle, then add a mixture of hydrazine hydrate and diethylenetriamine (15mL hydrazine hydrate, 20mL diethylenetriamine ethylenetriamine), then immerse the substrate into the solution in the reactor, and then place the reactor in an oven for hydrothermal synthesis reaction, the reaction temperature is 180°C, the reaction time is 24 hours, cooled to room temperature, washed , dried to obtain the final product NiSe-Ni 3 Se 2 nanomaterials.

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Abstract

The invention discloses a NiSe-Ni3Se2 three-dimensional pine needle shaped nano material for a supercapacitor and a preparation method thereof. The nano material is composed of NiSe and Ni3Se2, has three-dimensional pine needle shaped nano-needles with a uniform morphologic structure, the nano-needles are varied in length, the maximum length can reach 500nm, the diameter is 5-25nm, and the specific capacitance of the nano-needles is 970-1714F / g when being applied to an electrode. The NiSe-Ni3Se2 three-dimensional pine needle shaped nano material is synthesized by adopting a one-step hydrothermal method, nickel acetate tetrahydrate and sodium selenite are successively dissolved into deionized water, the solution is uniformly stirred and put into a reactor, then a mixed liquid of hydrazine hydrate and diethylenetriamine is added, a foamed nickel substrate is immersed into the reactor, and a hydrothermal synthesis reaction is carried out so as to acquire the NiSe-Ni3Se2 three-dimensional pine needle shaped nano material. The method disclosed by the invention is simple in preparation, energy-saving and environment-friendly, and a prepared product is excellent in electrochemical performance, thereby being suitable for industrial production.

Description

technical field [0001] The invention relates to the field of supercapacitor electrode materials, in particular to a selenide electrode material for supercapacitors and a preparation method thereof. Background technique [0002] With the rapid development of the global economy, the continuous consumption of fossil energy and the aggravation of environmental pollution, a series of worldwide problems of sustainable economic and social development in the future have attracted more and more attention from all countries in the world. In this context, people are actively looking for and developing various new clean energy sources, such as solar energy, wind energy, tidal energy, nuclear energy, biological energy, and so on. In the field of energy, it has become more and more important to develop a high-efficiency, low-cost, long-life, and environmentally friendly energy conversion and storage system. Among them, supercapacitor is a new type of energy storage device, its performanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/86C01B19/04B82Y30/00B82Y40/00
CPCY02E60/13
Inventor 吕建国杨杰
Owner ZHEJIANG UNIV
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