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Preparation method and application of porous foamed nickel loaded manganese oxide nanosheet array

A nanosheet array and porous foam technology, which is applied in the field of supercapacitor electrode material preparation, can solve the problems of reduced capacitor performance, low ionic conductivity, low electronic conductivity, etc. degree of effect

Inactive Publication Date: 2020-09-04
苏州机数芯微科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, similar to other oxide semiconductors, MnO 2 Still affected by the low electronic conductivity (10 -5 S cm -1 to 10 -6 S cm -1 ) and low ionic conductivity, so a large amount of energy is consumed in its internal resistance during charge and discharge, resulting in the actual specific capacity being much lower than the theoretical value
At the same time, it should be pointed out that the powders prepared in the past need to be further bonded to the substrate through adhesives before they can be used. Commonly used adhesives include polyvinylidene fluoride (PVDF), sodium carboxymethyl cellulose (CMC-Na ) and polytetrafluoroethylene (PTFE), etc., are polymer compounds with poor conductivity, often resulting in large internal resistance and reducing capacitor performance

Method used

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  • Preparation method and application of porous foamed nickel loaded manganese oxide nanosheet array
  • Preparation method and application of porous foamed nickel loaded manganese oxide nanosheet array
  • Preparation method and application of porous foamed nickel loaded manganese oxide nanosheet array

Examples

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Embodiment 1

[0030]Preparation of porous Ni foam-supported MnO nanosheet arrays:

[0031] 1. Soak 2cm×2cm nickel foam in acetone, ultrasonic 10min to remove the grease on the surface, then take out the nickel foam, transfer it to a hydrochloric acid solution with a concentration of 6mol / L, continue ultrasonication for 3 minutes to remove the surface oxide layer, and then take it out Transfer to a pure ethanol solution and continue sonication for 10 minutes. Repeat the above steps, wash continuously for 3 times and dry in a vacuum oven at 60°C to obtain a foamed nickel mesh with a clean surface.

[0032] 2. Weigh 10mmol of KMnO 4 (1.58 g) was dissolved in deionized water with a volume of 30 mL, and after ultrasonic treatment for 5 minutes to completely dissolve, add the above-mentioned piece of cleaned foam nickel mesh, transfer it to a hydrothermal reaction kettle with a volume of 50 mL, and heat to 160 ° C. Keep warm for 12 hours. Take it out after the temperature of the reaction is lo...

Embodiment 2

[0039] Preparation of porous Ni foam-supported MnO nanosheet arrays:

[0040] 1. Soak 3cm×3cm nickel foam in acetone, ultrasonic 10min to remove the grease on the surface, then take out the nickel foam, put it into a hydrochloric acid solution with a concentration of 4mol / L, continue ultrasonication for 3.5 minutes to remove the surface oxide layer, and then take it out Transfer to a pure ethanol solution and continue sonication for 10 minutes. Repeat the above steps, wash continuously for 3 times and dry in a vacuum oven at 60°C to obtain a foamed nickel mesh with a clean surface.

[0041] 2. Weigh 20mmol of KMnO 4 (3.16 g) was dissolved in deionized water with a volume of 40 mL, and after ultrasonic treatment for 5 minutes to completely dissolve, add the above-mentioned piece of cleaned foam nickel mesh, transfer it to a hydrothermal reaction kettle with a volume of 50 mL, and heat to 150 ° C. Keep warm for 10 hours. Take it out after the temperature of the reaction is lo...

Embodiment 3

[0044] Preparation of porous Ni foam-supported MnO nanosheet arrays:

[0045] 1. Soak 4cm×4cm nickel foam in acetone, ultrasonic 10min to remove the grease on the surface, then take out the nickel foam, transfer it to a hydrochloric acid solution with a concentration of 5mol / L, continue ultrasonication for 4 minutes to remove the surface oxide layer, and then take it out Transfer to a pure ethanol solution and continue sonication for 10 minutes. Repeat the above steps, wash continuously for 3 times and dry in a vacuum oven at 60°C to obtain a foamed nickel mesh with a clean surface.

[0046] 2. Weigh 20mmol of KMnO 4 (3.16 g) was dissolved in deionized water with a volume of 60 mL, and after ultrasonic treatment for 5 minutes to completely dissolve, add the above-mentioned piece of cleaned foam nickel mesh, transfer it to a hydrothermal reaction kettle with a volume of 100 mL, and heat to 150 ° C. Keep warm for 12 hours. Take it out after the temperature of the reaction is ...

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Abstract

The invention discloses a preparation method and application of a porous foamed nickel loaded manganese oxide nanosheet array, and relates to the technical field of supercapacitor electrode material preparation, and the preparation method comprises the following steps: dissolving potassium permanganate in deionized water to prepare a solution, and cleaning a foamed nickel net; transferring the potassium permanganate solution and the foamed nickel net into a hydrothermal reaction kettle together, heating, keeping the temperature, carrying out hydrothermal reaction, washing a reaction product after the reaction is finished, drying to obtain foamed nickel with an amorphous manganese oxide precursor growing on the surface, and calcining the foamed nickel in an inert atmosphere, so as to obtainthe catalyst. According to the foamed nickel loaded manganese oxide nanosheet array structure prepared by the invention, the capacitance value of an active material can be effectively improved, the ion transfer path length is shortened, the mechanical stress released in the charging and discharging process is buffered, high specific capacity can be effectively kept without attenuation in high-rate and long-period charging and discharging cycles, and industrial large-scale production is expected to be realized.

Description

technical field [0001] The present invention relates to the technical field of preparation of electrode materials for supercapacitors, in particular to a preparation method and application of porous nickel-supported manganese oxide nanosheet arrays Background technique [0002] The rapid growth of population and global economy has led to a rapid increase in the demand for energy consumption worldwide. Due to concerns about severe environmental pollution caused by fossil fuel consumption, coupled with the increasing demand for grid energy storage and consumer electronic devices, the development of efficient energy storage systems is imminent. Among various energy storage technologies, supercapacitors (Supercapacitors), also known as electrochemical capacitors, are different from other energy storage devices in that they store charges on the electrode surface and near-surface regions through electrochemical charge transfer processes. Occurring at a very fast rate, the cycle l...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/26H01G11/24H01G11/30H01G11/68H01G11/70H01G11/02H01G11/46B82Y40/00
CPCH01G11/86H01G11/26H01G11/24H01G11/30H01G11/68H01G11/70H01G11/02H01G11/46B82Y40/00Y02E60/13
Inventor 朱青陈晓露靳顺茹汤乐李磊磊杨丽
Owner 苏州机数芯微科技有限公司
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