Manganese dioxide nanowire array electrode on titanium substrate and preparation method thereof

A manganese dioxide nano-wire array technology, applied in electrode manufacturing, nanostructure manufacturing, manganese oxide/manganese hydroxide and other directions, can solve the problems of uneven growth of manganese dioxide nanowires and cannot be applied on a large scale. The effect of industrial application, good supercapacitive performance, good rate performance

Inactive Publication Date: 2014-07-02
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, manganese dioxide nanowire arrays can be grown on substrates by electrodeposition and template methods, but there are disadvantages that manganese dioxide nanowires grow unevenly and cannot be applied on a large scale; conventional hydrothermal methods cannot directly grow manganese dioxide nanowire arrays on substrates. Manganese dioxide nanowire arrays are grown on it, and only free powdery manganese dioxide nanowires can be grown

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  • Manganese dioxide nanowire array electrode on titanium substrate and preparation method thereof
  • Manganese dioxide nanowire array electrode on titanium substrate and preparation method thereof
  • Manganese dioxide nanowire array electrode on titanium substrate and preparation method thereof

Examples

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Embodiment 1

[0018] A manganese dioxide nanowire array electrode on a titanium substrate, the preparation method of which comprises: adding 0.6 grams of potassium permanganate (KMnO 4 ) dissolved in 35 ml of acetone (C 3 h 6 O), 5 ml of deionized water and 0.1 ml of 37% (mass fraction) hydrochloric acid solution (HCl), stir with a magnetic stirrer to fully dissolve, mix evenly, and make a mixed solution; place the titanium metal sheet into the prepared mixed solution; then sealed and heated to 200 degrees in the reaction kettle, and kept for 9 hours; after natural cooling, the titanium metal sheet was taken out to obtain the manganese dioxide nanowire array sample on the titanium substrate. The sample was observed with a scanning electron microscope, the results are shown in figure 1 , figure 1 The results show that its single manganese dioxide nanowires have a diameter of 300-500 nanometers and are vertically, uniformly and densely distributed on the surface of titanium metal in an arr...

Embodiment 2

[0021] A manganese dioxide nanowire array electrode on a titanium substrate, the preparation method of which comprises: adding 0.45 grams of potassium permanganate (KMnO 4 ), dissolved in 35 ml of acetone (C 3 h 6 O), 5 milliliters of deionized water and 0.16 milliliters, 37% (mass fraction) of hydrochloric acid solution (HCl), stir with a magnetic stirrer to make it fully dissolve, mix evenly, and make a mixed solution; place the titanium metal sheet into the prepared solution; then sealed and heated to 200 degrees in the reaction kettle, and kept for 10 hours; after natural cooling, the titanium metal sheet was taken out to obtain the manganese dioxide nanowire array sample on the titanium substrate. The sample was observed with a scanning electron microscope, the results are shown in figure 2 . figure 2 The results show that its single manganese dioxide nanowires have a diameter of 80-100 nanometers and are vertically, uniformly and densely distributed on the surface o...

Embodiment 3

[0025] A manganese dioxide nanowire array electrode on a titanium substrate, the preparation method comprising: adding 0.26 grams of potassium permanganate (KMnO 4 ), dissolved in 18 ml of acetone (C 3 h 6 O), 3 milliliters of deionized water and 0.065 milliliters, 37% (mass fraction) of hydrochloric acid solution (HCl), stir with a magnetic stirrer to make it fully dissolve, mix evenly, and make a mixed solution; put the titanium sheet into In the solution that has been prepared; Seal and heat to 200 degree then in the autoclave of polytetrafluoroethylene liner (100 milliliters), keep 9 hours; After natural cooling, titanium metal sheet is taken out, obtains the manganese dioxide nanowire on the titanium substrate Array samples. The samples were observed with a scanning electron microscope, the results are shown in image 3 . image 3The results show that its single manganese dioxide nanowires have a diameter of 50-100 nanometers and are vertically, uniformly and densely ...

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Abstract

The invention relates to a manganese dioxide nanowire array electrode on a titanium substrate and a preparation method thereof. The electrode is formed by manganese dioxide nanowire arrays on the titanium substrate, the diameter of a single manganese dioxide nanowire is 50-500 nanometers, and the manganese dioxide nanowires are vertically, uniformly and tensely distributed on the surface of titanium and are in an array form. The preparation method of the electrode comprises the following steps of fully mixing potassium permanganate, deionized water, acetone and hydrochloric acid solution to obtain mixed solution; arranging a titanium sheet in the mixed solution, arranging the mixed solution into a reactor, sealing the reactor, heating the reactor to 200 DEG C, and keeping the temperature for nine hours to ten hours; taking the titanium sheet out after the mixed solution is naturally cooled down, and obtaining the manganese dioxide nanowire array electrode on the titanium substrate. The manganese dioxide nanowire array electrode is applied to a lithium ion battery to show good circulating performance and rate capability and applied to a supercapacitor to show excellent electrochemical performance.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic materials, in particular to a manganese dioxide nanowire array electrode on a titanium substrate and a preparation method thereof. Background technique [0002] Due to the poor conductivity of manganese dioxide itself, ordinary manganese dioxide electrodes do not have good electrochemical properties, and are not ideal for electrode materials for lithium-ion batteries and supercapacitors. Therefore, it is necessary to carry out microscopic design of its scale and morphology. Active materials with nanowire array morphology have excellent performance in lithium-ion battery electrodes and supercapacitor electrodes, but due to the crystal characteristics of manganese dioxide itself, it is usually extremely difficult to grow large-area uniform nanowire arrays on substrates by hydrothermal method . In the prior art, manganese dioxide nanowire arrays can be grown on substrates by electrodeposition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B3/00H01M4/04H01G9/042C01G45/02
CPCY02E60/13Y02E60/10
Inventor 刘金平郭峻岭
Owner HUAZHONG NORMAL UNIV
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