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Preparation method of a novel nano-oxide supercapacitor electrode material

A nano-oxide, supercapacitor technology, applied in the direction of hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, etc., to achieve the effect of improving electrochemical activity, high conductivity, and improving conductivity

Active Publication Date: 2019-02-05
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, people mainly use polyhydroxy aldehydes or polyhydroxy ketones such as glucose and fructose to coat the carbon layer on the surface of supercapacitor electrode materials to improve the conductivity of the electrode and improve its supercapacitive performance. Research report on the introduction of functional groups on the surface of supercapacitor electrode materials by aldehydes or polyhydroxyketones to improve the performance of supercapacitors

Method used

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  • Preparation method of a novel nano-oxide supercapacitor electrode material
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  • Preparation method of a novel nano-oxide supercapacitor electrode material

Examples

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Embodiment 1

[0063] A method for preparing a supercapacitor electrode containing porous nickel oxide (NiO) coated nickel (Ni) nanoparticles containing hydroxyl, comprising the steps of preparing porous nickel oxide (NiO) coated nickel (Ni) nanoparticles and preparing a supercapacitor electrode A step of:

[0064] The steps for preparing porous NiO coated Ni nanoparticles are:

[0065] Step 1, thermal plasma preparation of Ni-Al alloy ingot

[0066] In the present invention, in an inert atmosphere, nickel (Ni) metal and aluminum (Al) metal are smelted into a Ni-Al alloy ingot at an atomic ratio of 1:1, and smelted three times to make the composition of the Ni-Al alloy ingot evenly distributed.

[0067] The smelting conditions include: the plasma working current is 220A, the plasma center temperature is 4700°C, the smelting time is 5min, and the argon gas is maintained at 0.1MPa during the smelting process.

[0068] The inert atmosphere is high-purity argon with a volume percent purity of ...

Embodiment 2

[0089] A method for preparing a supercapacitor electrode containing porous nickel-cobalt oxide (NiO, CoO) coated with nickel-cobalt (Ni-Co) alloy nanoparticles, which includes preparing a porous nickel-cobalt oxide (NiO, CoO) coated The step of nickel-cobalt (Ni-Co) alloy nanoparticle and the step of preparing supercapacitor electrode:

[0090] The steps for preparing porous (NiO, CoO) coated Ni-Co alloy nanoparticles are:

[0091] Step 1, thermal plasma preparation of Ni-Co-Al alloy ingot

[0092] In the present invention, nickel (Ni) metal, cobalt (Co) metal and aluminum (Al) metal are smelted into Ni-Co-Al alloy ingots in an atomic ratio of 9:38.5:52.5 in an inert atmosphere, and smelted 3 times to make Ni - Co-Al alloy ingot composition distribution is uniform;

[0093] The smelting conditions include: the plasma working current is 360A, the plasma center temperature is 5500°C, the smelting time is 3min, and the argon gas is maintained at 0.08MPa during the smelting proc...

Embodiment 3

[0113] A method for preparing a supercapacitor electrode containing porous nickel oxide (NiO) coated nickel (Ni) nanoparticles containing hydroxyl, comprising the steps of preparing porous nickel oxide (NiO) coated nickel (Ni) nanoparticles and preparing a supercapacitor electrode A step of:

[0114] The steps for preparing porous NiO coated Ni nanoparticles are:

[0115] Step 1, thermal plasma preparation of Ni-Al alloy ingot

[0116] In the present invention, in an inert atmosphere, nickel (Ni) metal and aluminum (Al) metal are smelted into a Ni-Al alloy ingot at an atomic ratio of 1:1, and smelted three times to make the composition of the Ni-Al alloy ingot evenly distributed.

[0117] The smelting conditions include: the plasma working current is 100A, the plasma center temperature is 4000°C, the smelting time is 10min, and the argon gas is maintained at 0.08MPa during the smelting process.

[0118] The inert atmosphere is high-purity argon with a volume percent purity o...

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Abstract

The invention discloses a preparing method of a novel nanometer oxide supercapacitor electrode material. The method comprises the steps of fully mixing porous nanometer oxide and an aqueous solution of glucose or fructose, wherein a solid product which is subjected to heating and separating is the porous nanometer oxide containing hydroxy; adopting the porous nanometer oxide containing hydroxy as a supercapacitor electrode material. According to the supercapacitor electrode which is prepared from the porous nanometer oxide containing hydroxyl, when the current density is 1A / g, and the specific capacitance value is 600-1000F / g, the supercapacitor performance can be obviously improved.

Description

technical field [0001] The invention relates to a supercapacitor electrode material, more particularly, to a supercapacitor electrode material which introduces hydroxyl groups on the surface of porous oxide nanoparticles and a preparation method thereof. Background technique [0002] In recent years, supercapacitors have attracted extensive attention as a new type of energy storage element. Compared with carbon materials, transition metal oxides can provide greater energy density and power density and become a research hotspot. Among them, nickel oxide and cobalt tetroxide are regarded as extremely potential electrode materials for supercapacitors due to their high theoretical capacitance values. However, due to its low conductivity, the actual capacitance value is much lower than the theoretical value. Therefore, improving the conductivity of electrode materials has become a key issue that needs to be solved urgently. At present, people mainly use polyhydroxy aldehydes o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30H01G11/46H01G11/86
CPCY02E60/13
Inventor 刘彤杜欢欢李惠
Owner BEIHANG UNIV