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Preparation method of nanomanganese oxide electrode material for supercapacitor

A technology for supercapacitors and electrode materials, applied in hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, nanotechnology, etc., can solve the problem that nano-manganese oxide is difficult to effectively control electrode materials, and it is difficult to obtain high power density and high density according to requirements. Energy density electrode materials and other issues, to achieve the effect of simple preparation process, increased specific surface area, and short cycle time

Inactive Publication Date: 2019-01-22
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the nano-manganese oxide prepared by the dealloying method is difficult to effectively control the surface and internal microscopic pore structure of the electrode material, and it is difficult to obtain electrode materials with high power density and high energy density according to the demand.

Method used

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  • Preparation method of nanomanganese oxide electrode material for supercapacitor
  • Preparation method of nanomanganese oxide electrode material for supercapacitor
  • Preparation method of nanomanganese oxide electrode material for supercapacitor

Examples

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Effect test

Embodiment 1

[0027] A preparation method of a supercapacitor nano manganese oxide electrode material, comprising the following steps:

[0028] (1) Put the pure aluminum block into the ceramic crucible of the outer graphite crucible, heat and melt it with an intermediate frequency induction furnace; wait for the aluminum block to be completely melted, then add the electrolytic manganese sheet, continue to heat up to 1400 ° C, stir with a carbon rod to determine the metal manganese Completely dissolve, so that the mass percentage of manganese in the alloy liquid is 25%, the rest is aluminum (Al) and no more than 0.5% of unavoidable impurities. After 15 minutes of heat preservation, the alloy liquid is left to stand and cooled to about 1200 ° C and cast into a metal mold for molding , to obtain Al-25%Mn alloy ingot;

[0029] (2) Mechanically cut the cast Al-25%Mn alloy ingot into small pieces and put them into a quartz tube with an open bottom, at 2.0×10 -2 Under the vacuum degree of Pa, the...

Embodiment 2

[0035] (3) Corrode the alloy thin strip in a NaOH solution with a mass fraction of 5%, and add a molar concentration of 6mM L to the corrosion solution -1 The surfactant sodium lauryl sulfate controls the corrosion environment, the corrosion temperature is 50 °C, until there are no obvious bubbles in the solution, the remaining flaky or powder solids in the solution are cleaned, dried, ground into powder, and naturally Oxidation to obtain nano manganese oxide powder;

[0036] (4) Using absolute ethanol as a dispersant, mix the dried manganese oxide powder, acetylene black, and binder polytetrafluoroethylene in a mass ratio of 80:10:10, and heat it to 65°C in an agate mortar. After grinding for 15 minutes, make a paste, apply it evenly on the pretreated nickel foam, and press it into an electrode material under a pressure of 10MPa in a powder tablet press, and then dry the electrode material in an electric heating constant temperature drying oven at 70°C until it reaches a cons...

Embodiment 3

[0040] (3) Corrode the alloy thin strip in a NaOH solution with a mass fraction of 5%, and add a molar concentration of 7mM L to the corrosion solution -1 The surfactant sodium lauryl sulfate controls the corrosion environment, the corrosion temperature is 50 °C, until there are no obvious bubbles in the solution, the remaining flaky or powder solids in the solution are cleaned, dried, ground into powder, and naturally Oxidation to obtain nano manganese oxide powder;

[0041] (4) Using absolute ethanol as a dispersant, mix the dried manganese oxide powder, acetylene black, and binder polytetrafluoroethylene in a mass ratio of 80:10:10, and heat it to 65°C in an agate mortar. After grinding for 15 minutes, make a paste, apply it evenly on the pretreated nickel foam, and press it into an electrode material under a pressure of 10MPa in a powder tablet press, and then dry the electrode material in an electric heating constant temperature drying oven at 70°C until it reaches a cons...

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Abstract

The invention relates to a preparation method of a nano-manganese oxide electrode material for a supercapacitor. The aluminum element in the precursor Al-Mn alloy strip is corroded by a dealloying method, and the nano-manganese is oxidized in the air to become a manganese oxide material. The composition of the corrosive solution during dealloying is used to regulate the microscopic morphology and internal pore structure of the material to improve the mass transfer characteristics inside the material, thereby obtaining a supercapacitor with high specific capacitance characteristics. The preparation process of the invention is simple, the cycle is short, and the production cost is low, which overcomes the shortcomings of complex process, high energy consumption and high production cost in the prior art of manganese oxide electrode materials.

Description

technical field [0001] The invention belongs to the technical field of preparation of supercapacitor materials, and in particular relates to a preparation method of a supercapacitor nanometer manganese oxide electrode material. Background technique [0002] As a new type of chemical power source, supercapacitor has the advantages of high power density, long cycle life, safety, and environmental protection. It has become the focus of many scientific researchers, and has also become the key research object of the current national government support and development strategy. In recent years, with the increasing maturity of supercapacitor technology, its application fields are also expanding, not only widely used in various portable electronic devices, but also in fields such as electric vehicle power compensation devices. [0003] Transition metal oxides such as manganese oxide can be used to prepare electrode materials for supercapacitors because of their low cost, environment...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/46H01G11/86B82Y40/00B82Y30/00
CPCY02E60/13
Inventor 李娇娇胡勋贾鹏侯红艳章展铭
Owner UNIV OF JINAN
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