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Vanadium-doped nickel selenide nano-array material without adhesive as well as preparation method and application of vanadium-doped nickel selenide nano-array material

A nano-array, non-adhesive technology, applied in the field of electrochemical materials, can solve the problem of weakening the electrochemical performance of electrode materials

Pending Publication Date: 2022-07-08
SHANGHAI UNIV OF MEDICINE & HEALTH SCI
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  • Description
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Problems solved by technology

[0005] However, nanomaterials are easy to aggregate, which will inevitably weaken the electrochemical performance of electrode materials.
At the same time, the synthesized solid powder material needs to be fixed on the nickel foam by adding a binder material, which undoubtedly weakens the electrochemical performance of the electrode material again.

Method used

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  • Vanadium-doped nickel selenide nano-array material without adhesive as well as preparation method and application of vanadium-doped nickel selenide nano-array material
  • Vanadium-doped nickel selenide nano-array material without adhesive as well as preparation method and application of vanadium-doped nickel selenide nano-array material
  • Vanadium-doped nickel selenide nano-array material without adhesive as well as preparation method and application of vanadium-doped nickel selenide nano-array material

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preparation example Construction

[0042] The invention provides a preparation method of a vanadium-doped nickel selenide nano-array material without an adhesive. The prepared method involves a one-step hydrothermal method, and a binder-free vanadium-doped nickel selenide nanoarray material is successfully prepared, and as a supercapacitor positive electrode material, it has a high specific capacitance.

[0043] In the above technical scheme, in order to prove that V-NiSe / NF-2 has excellent specific capacitance when used as a positive electrode material for supercapacitors. Preferably, the as-synthesized V-NiSe / NF-0 material is applied as a positive electrode material to supercapacitors for comparison.

[0044] In the above technical scheme, in order to prove that V-NiSe / NF-2 has excellent specific capacitance when used as a positive electrode material for supercapacitors. Preferably, the synthesized V-NiSe / NF-1 material is applied to supercapacitors as a positive electrode material for comparison.

[0045]In...

Embodiment 1

[0051] 1. Pretreatment of nickel foam:

[0052] Take a piece of 1cm × 2cm nickel foam (model: KSH-1011, thickness 1mm, about 35mg), followed by 3mol L - 1 HCl solution, deionized water, and absolute ethanol were ultrasonically cleaned for several times in an ultrasonic instrument to remove oxides and impurities on the surface. Finally, put it in an oven to dry at 60°C for later use.

[0053] 2. Preparation of V-NiSe / NF-0 material:

[0054] (1) Preparation of solution: Add 15 mg of selenium powder to 10 mL of hydrazine hydrate solution, stir until dissolved, and form a dark red transparent homogeneous solution.

[0055] (2) Reaction preparation: transfer the above solution into a Teflon-coated reaction kettle, put the pretreated nickel foam into the kettle, and transfer it to an oven for reaction. The reaction temperature is 140°C and the reaction time is 3h. .

[0056] (3) post-reaction treatment: the nickel foam obtained in step (2) is repeatedly rinsed with deionized wa...

Embodiment 2

[0062] 1. Pretreatment of nickel foam:

[0063] Take a piece of 1cm × 2cm nickel foam (model: KSH-1011, thickness 1mm, about 35mg), followed by 3mol L - 1 HCl solution, deionized water, and absolute ethanol were ultrasonically cleaned for several times in an ultrasonic instrument to remove oxides and impurities on the surface. Finally, put it in an oven to dry at 60°C for later use.

[0064] 2. Preparation of V-NiSe / NF-1 material:

[0065] (1) Preparation of solution: add vanadyl acetylacetonate with a mass of 10 mg into 20 mL of absolute ethanol, stir until dissolved, and form a light blue transparent homogeneous solution, denoted as solution A. Then 15 mg of selenium powder was added to 10 mL of hydrazine hydrate solution, stirred until dissolved, and a dark red transparent homogeneous solution was formed, denoted as B solution. The A solution was then transferred to the B solution, and the stirring was continued for 30 min to obtain a homogeneous solution.

[0066] (2)...

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Abstract

The invention relates to an adhesive-free vanadium-doped nickel selenide nano array material and a preparation method and application thereof, and the preparation method comprises the following steps: (1) preparing a solution: dissolving vanadyl acetylacetonate and selenium powder to obtain a uniform mixed solution; (2) reaction preparation: putting the pretreated foamed nickel into the mixed solution, and carrying out hydrothermal reaction; and (3) reaction post-treatment: washing the foamed nickel after the hydrothermal reaction, and drying to constant weight to obtain the adhesive-free vanadium-doped nickel selenide nano array material which is used as a positive electrode material of a supercapacitor. Compared with the prior art, the preparation method has the advantages that the specific capacitance is higher, the rate capability is excellent, the operation method is simple and controllable, the electrode material can be directly used without further processing, the cost is lower, no environmental pollution is caused and the like.

Description

technical field [0001] The invention relates to the field of electrochemical materials, in particular to an adhesive-free vanadium-doped nickel selenide nano-array material and a preparation method and application thereof. Background technique [0002] Nowadays, due to the excessive use of traditional energy sources such as fossil fuels, environmental problems and energy crises are becoming more and more serious. There is an urgent need to explore and develop environmentally friendly and efficient energy conversion and storage devices. Supercapacitors (SCs), also known as electrochemical capacitors (ECs), have the advantages of environmental protection, good stability, wide operating voltage, and high power density compared with rechargeable batteries, which are widely used by researchers in the field of electrochemical energy storage. focus on. As a new type of energy storage device, supercapacitors (SCs) are considered to play an important role in solving the problems of...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/30H01G11/24H01G11/26B82Y30/00B82Y40/00
CPCH01G11/86H01G11/30H01G11/24H01G11/26B82Y30/00B82Y40/00Y02E60/13
Inventor 张莉夏京京陈雅琼张颖
Owner SHANGHAI UNIV OF MEDICINE & HEALTH SCI
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