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Manganese dioxide dendritic nano array electrode material and preparation method

A manganese dioxide, electrode material technology, applied in nanotechnology, nanotechnology, hybrid capacitor electrodes, etc., can solve the problems of coherent growth without dendritic structure, and achieve excellent high current charge and discharge capacity, high orderliness , the effect of good electrical conductivity

Inactive Publication Date: 2015-05-27
NORTHWEST UNIV(CN)
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  • Summary
  • 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.

Method used

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  • Manganese dioxide dendritic nano array electrode material and preparation method
  • Manganese dioxide dendritic nano array electrode material and preparation method
  • Manganese dioxide dendritic nano array electrode material and preparation method

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Embodiment 1

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

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

[0056] Add 1cm×3cm single-throw silicon wafers in turn into a 45mL hydrothermal kettle, add 0.396g potassium permanganate, 0.58mL 38% concentrated hydrochloric acid and about 33mL deionized water into the hydrothermal kettle, so that potassium permanganate and hydrochloric acid The molar ratio of the hydrochloric acid is 1:4, and the concentration of hydrochloric acid is 2 / 7mol / L; the hydrothermal kettle is placed in an oven, and the temperature is adjusted to 140°C for primary crystal growth, and the primary growth time is 12 hours; primary growth Cool down after completion, take out the single-throw silicon wafer; centrifuge the solution in the hydrothermal kettle three times at a centrifugal speed of 5000r / min, and dry to obtain a single-throw silicon wafer...

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Abstract

The invention provides a manganese dioxide dendritic nano array electrode material and a preparation method. Four columns of monocrystal manganese dioxide square nano tube branches grow on four side ridges of a monocrystal manganese dioxide square nano tube trunk of each dendritic manganese dioxide array unit; an included angle between the axial direction of each branch and the axial direction of the trunk ranges from 57 degrees to 62 degrees. The electrode material is synthesized by a two-step hydrothermal method; in the first hydrothermal method process, a single-polished silicon slice is used as a substrate for growing a nano array preliminarily; in the second hydrothermal method process, a single-polished silicon slice with the monocrystal manganese dioxide square nano tube trunk is used as a substrate for growing the nano array secondarily; during secondary growth, the polished surface of the single-polished silicon slice with the monocrystal manganese dioxide square nano tube trunk is placed downwards; during secondary growth, three single-polished silicon slices with the monocrystal manganese dioxide square nano tube trunks are provided; the concentration of raw materials in the secondary growth is lower than that of the raw materials in the preliminary 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 equipment reduces the use of fossil energy, thereby greatly relieving the pressure brought about by energy shortages and other issues. Supercapacitors, also known as electrochemical capacitors, have excellent charging and discharging performance and large-capacity energy storage. performance. It has become a new type of energy storage device because of its large storage energy, light weight, and multiple charge and discharge, and has received extensive attention from scientific researchers in recent years....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/46H01G11/86
CPCY02E60/13H01G11/24B82Y30/00B82Y40/00H01G11/46
Inventor 樊海明余宝智任兆玉
Owner NORTHWEST UNIV(CN)
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