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One-dimensional MnO2@NiMoO4 core shell heterojunction composite material and preparation method and application thereof

A composite material and heterojunction technology, which is applied in the field of one-dimensional MnO2@NiMoO4 core-shell heterojunction composite material and its preparation, can solve the problems of poor electrochemical properties, unstable cycling, and poor rate performance of electrode materials. To achieve the effect of easy regulation, low cost and convenient post-processing

Active Publication Date: 2016-08-31
ANHUI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also in the Journal of Ceramics International, Xing Gao et al. reported that Co 3 o 4 The electrochemical properties of electrode materials are not good, and so on, so the general single transition metal electrode materials have defects such as small specific capacitance, poor rate performance, and unstable cycle.

Method used

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  • One-dimensional MnO2@NiMoO4 core shell heterojunction composite material and preparation method and application thereof
  • One-dimensional MnO2@NiMoO4 core shell heterojunction composite material and preparation method and application thereof
  • One-dimensional MnO2@NiMoO4 core shell heterojunction composite material and preparation method and application thereof

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preparation example Construction

[0027] The invention provides a one-dimensional MnO 2 @NiMoO 4 A method for preparing a core-shell heterojunction composite material, the preparation method comprising:

[0028] 1) MnO 2 Preparation of nanowire monomers;

[0029] 2) Combine urea, soluble nickel salt, soluble molybdate and MnO 2 Contact reaction of nanowire monomers in water to produce one-dimensional MnO 2 @NiMoO 4 Core-shell heterojunction composites.

[0030] In step 2) of the above-mentioned preparation method, the consumption of each material can be selected in a wide range, but in order to make the composite material obtained have more excellent specific capacitance and cycle stability, preferably, relative to 0.2-0.6mmol MnO 2 Nanowire monomer, the amount of urea is 2-6mmol, the amount of soluble nickel salt is 1-3mmol, and the amount of soluble molybdate is 1-3mmol;

[0031] In step 2) of the above-mentioned preparation method, the amount of water can be selected in a wide range, but in order to...

preparation example

[0043] MnO 2 Preparation of nanowire monomers:

[0044] 10ml of KMnO 4 Aqueous solution (0.04mol / L) and 10ml of NH 4 Cl aqueous solution (0.04mol / L) was reacted at 180°C for 20h to prepare MnO 2 nanowire monomer.

Embodiment 1

[0046] 1) MnO 2 Nanowire monomer (0.4mmol) was ultrasonically dispersed in 20mL water for 3min to prepare MnO 2 Nanowire monomer aqueous solution;

[0047] 2) Add 4mmol urea and 1mmol nickel chloride to the above MnO 2 Nanowire monomer aqueous solution and stirred at 25°C for 30min; then added 1mmol sodium molybdate and ultrasonically oscillated at 25°C for 5min; then placed at 110°C for 12h; finally cooled, deionized water and absolute ethanol Each was washed 3 times and dried at 60°C to obtain one-dimensional MnO 2 @NiMoO 4 Core-shell heterojunction composite A1.

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Abstract

The invention discloses a one-dimensional MnO2@NiMoO4 core shell heterojunction composite material and a preparation method and an application thereof. The preparation method comprises the steps of: 1) preparing a MnO2 nano-wire monomer; and 2) carrying out contact reaction on urea, soluble nickel salt, soluble molybdate and the MnO2 nano-wire monomer in water so as to prepare the one-dimensional MnO2@NiMoO4 core shell heterojunction composite material. By adopting the method, the MnO2@NiMoO4 composite material with good specific capacitance and circulation stability is obtained, the composite material is capable of serving as an electrode material of an electrochemical capacitor, and the preparation method is simple to operate, low in cost, mild in condition, and green and environmental-friendly.

Description

technical field [0001] The present invention relates to MnO 2 @NiMoO 4 Composite materials, in particular, relate to a one-dimensional MnO 2 @NiMoO 4 Core-shell heterojunction composite material and its preparation method and application. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, play an important role in complementing Li-ion batteries for energy storage due to their high power density, fast ion exchange rate, and long cycle life. [0003] In recent years, in order to find new and low-cost electrode materials, researchers have studied transition metal materials, which have a wide range of applications in the fields of catalysis, electrochemistry and gas sensors due to their unique physical and chemical properties. aroused great interest. [0004] The performance of electrochemical capacitors largely depends on their electrode materials. The current electrode materials are mainly transition metal materials, such as transitio...

Claims

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Application Information

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IPC IPC(8): H01G11/46H01G11/86
CPCY02E60/13H01G11/46H01G11/86
Inventor 王秀华夏厚勇
Owner ANHUI NORMAL UNIV
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