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Active material used for capacitor electrode and preparation method of active material

A capacitor electrode and active material technology, applied in capacitors, electrolytic capacitors, circuits, etc., can solve the problem of high cost, achieve the effects of preventing agglomeration, simplifying the preparation process, and improving ion transmission

Active Publication Date: 2014-02-12
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, ruthenium oxide has the best performance, which can reach 1580F / g, but the cost is higher

Method used

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  • Active material used for capacitor electrode and preparation method of active material
  • Active material used for capacitor electrode and preparation method of active material
  • Active material used for capacitor electrode and preparation method of active material

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preparation example Construction

[0030] In one embodiment of the present invention, the preparation method of active material for capacitor electrode of the present invention, it comprises the following steps:

[0031] (1) Using nickel nitrate hexahydrate and / or cobalt nitrate hexahydrate as raw materials to prepare a mixed solution of 1-methyl-2-pyrrolidone and water;

[0032] (2) The mixed solution is subjected to reflux stirring and solvothermal reaction to obtain a hydroxide precursor;

[0033] (3) heat-treating the precursor to obtain nickel oxide, cobalt oxide or nickel-cobalt oxide active material;

[0034] Wherein, the prepared active material is a porous multi-level nanomaterial assembled from nanosheets.

[0035] In one embodiment, in the above step (1), nickel nitrate hexahydrate and cobalt nitrate hexahydrate are dissolved in a mixed solution containing 1-methyl-2-pyrrolidone and water. The mass fraction of the nickel salt in the mixed salt can be adjusted from 0 to 100%, and the active material...

Embodiment 1

[0050] Take 0.67g of nickel nitrate hexahydrate and 1.33g of cobalt nitrate hexahydrate and dissolve in a mixed solution containing 60mL of 1-methyl-2-pyrrolidone and 5mL of water. The above mixed solution was heated to 180°C, stirred at reflux for 2h, and cooled to room temperature. Subsequently, the obtained raw materials were transferred to a polytetrafluoroethylene reactor, solvothermally heated at 180° C. for 6 h, and then cooled to room temperature. After filtering, washing with water, and washing with ethanol in sequence, repeat three times, and finally dry to obtain the precursor. The precursor obtained in the process was heat-treated at 250° C. for 6 h to obtain a hierarchically porous binary nickel-cobalt oxide nanomaterial.

[0051] figure 1 Curve a in the middle is the XRD spectrum of the nickel-cobalt oxide prepared in this embodiment, and the peaks in the spectrum completely match the standard spectrum of nickel cobaltate. Elemental analysis also confirmed tha...

Embodiment 2

[0057] Dissolve 1 g of nickel nitrate hexahydrate and 1 g of cobalt nitrate hexahydrate in a mixed solution containing 60 mL of 1-methyl-2-pyrrolidone and 5 mL of water. The above mixed solution was heated to 180°C, stirred at reflux for 2h, and cooled to room temperature. Subsequently, the obtained raw materials were transferred to a polytetrafluoroethylene reactor, solvothermally heated at 180° C. for 6 h, and then cooled to room temperature. After filtering, washing with water, and washing with ethanol in sequence, repeat three times, and finally dry to obtain the precursor. The precursor obtained in the process was heat-treated at 250° C. for 6 h to obtain a hierarchically porous binary nickel-cobalt oxide nanomaterial.

[0058] figure 1 The middle curve b is the XRD spectrum of the nickel-cobalt oxide prepared in this embodiment, and it can be seen that the product contains both nickel cobaltate and nickel oxide. Elemental analysis confirmed that the molar ratio of nic...

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Abstract

The invention provides an active material used for a capacitor electrode and a preparation method of the active material. The preparation method comprises the following steps: nickel nitrate hexahydrate and / or cobalt nitrate hexahydrate are adopted as raw materials to prepare a mixed solution of 1-methyl-2-pyrrolidone and water; backflow stirring and solvent thermal reaction are performed on the mixed solution so that a hydroxide precursor is obtained; thermal treatment is performed on the precursor so that a nickel oxide, a cobalt oxide or a nickel and cobalt oxide active material is obtained. The manufactured nickel and cobalt oxide material is multistage and porous so that contact of the material and an electrolyte and transmission of ions can be effectively enhanced. Besides, because of the multistage structure of the material, a problem of agglomeration in the cycle process of nano-materials can be prevented. Any surfactants or soft and rigid templates are not introduced to the preparation process of the material so that the whole preparation process is simplified.

Description

technical field [0001] The invention belongs to the field of new material technology and new energy technology, and specifically relates to a multi-level porous nickel-cobalt oxide nanomaterial with ultrahigh specific capacitance and a preparation method thereof. Background technique [0002] Due to the increasing shortage of oil resources and the pollution of the environment by the exhaust emissions of internal combustion engines burning oil, people are studying new energy devices to replace internal combustion engines. It has achieved certain results in the research and development of hybrid power, fuel cells, and chemical battery products and applications. However, due to their inherent shortcomings such as short service life, poor temperature characteristics, environmental pollution by chemical batteries, complex systems, and high cost, there has been no good solution. With its excellent characteristics, supercapacitors can partially or completely replace traditional ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042
Inventor 孙静昌杰高濂
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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