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Foam nickel-base MnO2/C composite electrode material and preparation method thereof

A composite electrode and nickel foam technology, which is used in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems of small specific surface area of ​​metal oxides, high specific capacitance, high energy density, and low specific capacity.

Inactive Publication Date: 2013-02-20
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Ordered porous carbon materials, as electrode materials for supercapacitors, have the advantages of large specific surface area, uniform pore size distribution, and stable physical and chemical properties, but their low specific capacity and low energy density are still unavoidable.
Both metal oxide and conductive polymer electrode materials have the characteristics of large specific capacitance, high energy density and fast charge and discharge; however, the specific surface area of ​​metal oxide is small, and the volume of conductive polymer will expand during long-term charge and discharge. and shrink, the performance is not stable

Method used

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  • Foam nickel-base MnO2/C composite electrode material and preparation method thereof
  • Foam nickel-base MnO2/C composite electrode material and preparation method thereof
  • Foam nickel-base MnO2/C composite electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Cleaning of the foamed nickel substrate: Cut the foamed nickel substrate into a 1cm*1cm square, and leave a narrow strip (0.1cm*1cm) on one side for inserting into the base (the base is made of a polytetrafluoroethylene material. A small cube with a volume of about 1cm 3 Left and right, a narrow groove is dug out on it, which is used to fix the foamed nickel substrate. Inserting the foamed nickel substrate into the base can make the foamed nickel substrate immersed in the solution, thereby preventing the foamed nickel substrate from floating on the solution. ; Then the foamed nickel substrate is ultrasonically washed for 10 minutes with deionized water, ethanol, acetone, ethanol and deionized water in turn, then dried, and finally the foamed nickel substrate is fixed on the base that has been cleaned and dried.

[0035]Dissolve 2.4g of glucose in 40mL of deionized water to form a clear solution, prepare an aqueous glucose solution, and place the aqueous glucose solution...

Embodiment 2

[0041] The method and dosage of hydrothermally depositing carbon material on the pretreated nickel foam are the same as in Example 1, except that the concentration of the glucose deionized aqueous solution is 0.5 mol / L. Electrochemical deposition method was used, in the presence of 0.2 mol·L -1 Na 2 S0 4 and 0.04mol·L -1 MnS0 4 In the aqueous solution of , the voltage of the potentiostatic I-t curve is set to 1.1V, the deposition time is 2h, and Mn0 is deposited on the surface of the carbon electrode. 2 Thin layer, the auxiliary electrode used in this experiment is a metal platinum sheet electrode, so as to obtain a foamed nickel-based Mn0 2 / C composite electrode.

[0042] Weighing Foam Nickel Base Mn0 2 / C mass of composite electrode, the mass minus the mass of blank nickel foam after pretreatment is the Mn0 on growth 2 / C quality of composites, Mn0 prepared in this example 2 The mass of the / C composite is 0.0126 g. The prepared foamed nickel-based Mn0 2 The / C ...

Embodiment 3

[0045] The method and dosage of hydrothermally depositing carbon material on the pretreated nickel foam are the same as in Example 1, except that the concentration of the glucose deionized aqueous solution is 0.3 mol / L.

[0046] Electrochemical deposition method was used, in the presence of 0.3 mol·L -1 Na 2 S0 4 and 0.06mol·L -1 MnS0 4 In the solution, the voltage of the potentiostatic I-t curve was set to 1.1V, and the deposition time was 2h. The auxiliary electrode used in this experiment was a metal platinum sheet electrode, and Mn0 was deposited on the surface of the carbon electrode. 2 thin layer to obtain foamed nickel-based Mn0 2 / C composite electrode.

[0047] Weighing Foam Nickel Base Mn0 2 / C the mass of the composite electrode, the mass minus the mass of the blank nickel foam after pretreatment is the Mn0 on the growth 2 / C quality of composites, Mn0 prepared in this example 2 The mass of the / C composite is 0.0126 g. The prepared foamed nickel-based and ...

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Abstract

The invention belongs to the technical field of supercapacitors, and particularly relates to an MnO2 / C composite electrode material prepared on foam nickel by a hydrothermal-electrodeposition combination method, and a preparation method thereof. The electrode material can be widely used in battery electrodes and supercapacitor electrodes. The MnO2 / C composite electrode material is composed of a carbon sphere material hydrothermally deposited on a foam nickel substrate, and a manganese peroxide material deposited on the carbon sphere material by an electrodeposition method. The composite electrode material provided by the invention has the advantages of simple technique and low cost, and can easily implement large-scale production. The maximum discharge specific capacity of the supercapacitor made of the foam nickel-base metal nickel oxide / carbon composite electrode material can reach 1045.5F.g<-1>, and the supercapacitor has favorable power performance and cycle performance.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and in particular relates to a MnO prepared on nickel foam by a combined method of hydrothermal-electrodeposition 2 / C composite electrode material and preparation method thereof, the electrode material can be widely used in battery electrodes and supercapacitor electrodes. Background technique [0002] The energy crisis and environmental pollution have attracted more and more attention, which has prompted people to look for various new types of energy to replace traditional fossil energy. Capacitor is a kind of equipment and device that can store electric energy. Because its use can avoid the wrong action of electronic instruments and equipment due to instantaneous power cut off or occasional voltage drop, it is widely used as a backup power supply in audio / video equipment, In communication equipment and household appliances such as coordinators, telephones, fax machines and computers, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/86
CPCY02E60/13
Inventor 赵纯王艳贺馨平蔚佳彤索辉隋永菊
Owner JILIN UNIV
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