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Nickel cobaltite nano material and preparation method of composite electrode material

A technology of nano-materials and composite electrodes, applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of difficult to meet large-area applications and low output, and achieve wide application, large specific surface area, and complete structure Effect

Inactive Publication Date: 2016-11-02
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrothermal method, electrodeposition method, and sol-gel method involved in the above preparation methods are difficult to meet the needs of large-area applications due to low yields, and with the continuous improvement of application technology, the single electrode material produced has gradually failed. To meet the actual application requirements, its electrochemical performance needs to be further improved

Method used

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  • Nickel cobaltite nano material and preparation method of composite electrode material
  • Nickel cobaltite nano material and preparation method of composite electrode material
  • Nickel cobaltite nano material and preparation method of composite electrode material

Examples

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Effect test

Embodiment 1

[0038] Example 1 Preparation method of nickel cobaltate nanotube X1 and manganese dioxide nanosheet-coated nickel cobaltate nanotube composite material Y1

[0039] Wherein, the preparation method of nickel cobalt oxide nanotube X1 comprises the following steps:

[0040] (1) Weigh nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) and cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) Dissolved in a mixed solution of 1.5mL acetic acid and 6mL ethanol and fully stirred to form a nickel cobaltate nanotube X1 precursor solution, wherein the molar weights of nickel nitrate hexahydrate and cobalt nitrate hexahydrate were 0.5mmol and 1mmol respectively.

[0041] (2) Adding polyvinylpyrrolidone to the nickel cobaltate nanotube X1 precursor solution to form a first mixed solution Z1.

[0042] (3) Put the first mixed solution Z1 into a disposable plastic syringe and replace it with a stainless steel needle. Put the syringe into a syringe pump, connect the needle to a high-voltage powe...

Embodiment 2

[0050] Example 2 Preparation method of nickel cobaltate nanowire X2 and manganese dioxide nanosheet-coated nickel cobaltate nanowire composite material Y2

[0051] Wherein, the preparation method of nickel cobalt oxide nanowire X2 comprises the following steps:

[0052] (1) Weigh nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) and cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) Dissolved in a mixed solution of 0.5mL acetic acid and 5mL ethanol and fully stirred to form a nickel cobaltate nanowire X2 precursor solution, wherein the molar weights of nickel nitrate hexahydrate and cobalt nitrate hexahydrate were 0.25mmol and 0.5mmol respectively.

[0053] (2) Add polyvinyl alcohol, a high molecular polymer, to the nickel cobaltate nanowire X2 precursor solution to form a first mixed solution Z2.

[0054] (3) Put the first mixed solution Z2 into a disposable plastic syringe and replace it with a stainless steel needle. Put the syringe into a syringe pump, connect the needl...

Embodiment 3

[0060] Example 3 Preparation method of nickel cobaltate nanotube X3 and manganese dioxide nanosheet-coated nickel cobaltate nanotube composite material Y3

[0061] Wherein, the preparation method of nickel cobalt oxide nanotube X3 comprises the following steps:

[0062] (1) Weigh nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) and cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) Dissolved in a mixed solution of 0.8mL acetic acid and 1.6mL ethanol and fully stirred to form a nickel cobaltate nanotube X3 precursor solution, wherein the molar weights of nickel nitrate hexahydrate and cobalt nitrate hexahydrate were 0.3mmol and 0.6mmol respectively.

[0063] (2) Adding polyvinylpyrrolidone to the nickel cobaltate nanotube X3 precursor solution to form a first mixed solution Z3.

[0064] (3) Put the first mixed solution Z3 into a disposable plastic syringe and replace it with a stainless steel needle. Put the syringe into a syringe pump, connect the needle to a high-voltage ...

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Abstract

The invention provides a nickel cobaltite nano material and a preparation method of a composite electrode material. The preparation method includes the following steps that: cobalt salt and nickel salt are dissolved in a mixed solution of acetic acid and ethanol, so that a nickel cobaltite precursor solution can be formed; high-molecular polymer is added into the nickel cobaltite precursor solution, so that a first mixed liquor can be formed; and the first mixed liquor is injected into a spraying device, in a high-voltage electrostatic field, based on a high-voltage electrostatic spinning technology, the first mixed liquor is sprayed to a receiving device through the spraying device, and a nickel cobaltite nano material precursor is formed on the receiving device. According to the preparation method of the composite electrode material of the invention, the nickel cobaltite nano material of a large area can be prepared through the electrostatic spinning method, and therefore, the nickel cobaltite nano material has high specific surface area; and when the nickel cobaltite nano material is composited with a traditional manganese dioxide material, so that the performance of a single material can be improved, and the problem of poor electrical conductivity of manganese dioxide can be solved. As indicated by an electrochemical test, the specific capacitance of the composite material is as high as 706.7F / g under 3A / g current density.

Description

technical field [0001] The invention relates to a preparation method of a nickel cobaltate nanometer material and a composite electrode material thereof. Background technique [0002] In order to meet the demands of sustainable energy development in the future, it is particularly important to develop a new, low-cost and environmentally friendly energy conversion and storage device. Supercapacitors can be used as power sources for wearable electronics and microelectronics due to their high power density and long cycle life. [0003] Electrode materials are one of the key factors determining the performance of supercapacitors. According to the differences in electrochemical energy storage mechanisms, electrode materials mainly include carbon materials, conductive polymers, and transition metal oxides. Transition metal oxides have attracted the attention of researchers due to their higher specific capacitance than carbon materials and conductive polymers. Among many transitio...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/24H01G11/30H01G11/46
CPCY02E60/13H01G11/86H01G11/24H01G11/30H01G11/46
Inventor 徐开兵李世杰杨方方竹黄小娟刘锡建
Owner DONGHUA UNIV
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