A kind of manganese dioxide dendritic nano-array electrode material and its preparation method

A manganese dioxide and nano-array technology, which is used in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors. High, good cycle stability effect

Inactive Publication Date: 2017-03-15
NORTHWEST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, supercapacitors still face some problems: how to increase specific capacity, thereby increasing energy density; how to enhance cycle stability; how to improve high current charge and discharge capacity, etc.
But at present, due to technical problems, coherent growth has not been applied to the construction of dendritic structures.

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  • A kind of manganese dioxide dendritic nano-array electrode material and its preparation method
  • A kind of manganese dioxide dendritic nano-array electrode material and its preparation method
  • A kind of manganese dioxide dendritic nano-array electrode material and its preparation method

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Embodiment 1

[0054] This embodiment provides a method for preparing a manganese dioxide dendritic nano-array electrode material, and the method specifically includes the following steps:

[0055] Step 1, the first step of hydrothermal method:

[0056] In a 45mL hydrothermal kettle, a single-throw silicon wafer of 1cm×3cm was added successively, and 0.396g potassium permanganate, 0.58ml 38% concentrated hydrochloric acid and about 33ml deionized water were added to the hydrothermal kettle to make potassium permanganate and hydrochloric acid The molar ratio of the crystals is 1:4, and the concentration of hydrochloric acid is 2 / 7mol / L; the hydrothermal kettle is placed in the oven, the temperature is adjusted to 140 °C, and the crystal is grown once, and the growth time is 12h; After cooling, the single-throw silicon wafer was taken out; the solution in the hydrothermal kettle was centrifuged three times at a centrifugal speed of 5000 r / min, and dried to obtain a single-throw silicon wafer w...

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Abstract

The invention provides a manganese dioxide dendritic nanoarray electrode material and a preparation method. Each dendritic manganese dioxide array unit has four rows of single crystals grown on the four side edges of the backbone of a single crystal manganese dioxide square nanotube. Manganese dioxide square nanotube branches; the angle between the axis of the branches and the axis of the main trunk is in the range of 57° to 62°. It is synthesized using a two-step hydrothermal method; in the first step of the hydrothermal method, a single-polish silicon wafer is used as a substrate to grow the nanoarray at once; in the second step of the hydrothermal method, a single crystal manganese dioxide square nanotube backbone is grown. The single-polished silicon wafer is used as a substrate for secondary growth of the nanoarray; during the secondary growth, the single-polished silicon wafer with the single crystal manganese dioxide square nanotube backbone is placed with the polished side downward; during the secondary growth, the growth is The single-crystal manganese dioxide square nanotube has three single-throw silicon wafers; the concentration of raw materials in the secondary growth is lower than that in the primary growth.

Description

technical field [0001] The invention belongs to the field of new energy supercapacitors, and relates to an electrode material, in particular to a manganese dioxide dendritic nano-array electrode material and a preparation method. Background technique [0002] The shortage of fossil energy and environmental pollution are the most serious global problems today, which have brought great pressure to the survival of human beings. The emergence of electrochemical energy storage devices has reduced the use of fossil energy, thus greatly alleviating the pressure caused by problems such as energy shortages. Supercapacitors, also known as electrochemical capacitors, have excellent charge-discharge performance and large-capacity energy storage. performance. It has become a new type of energy storage device due to its large energy storage, light weight, and multiple charge and discharge capabilities, and has received extensive attention from scientific researchers in recent years. Wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/46H01G11/86
CPCY02E60/13
Inventor 樊海明余宝智任兆玉
Owner NORTHWEST UNIV
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