Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Hollow honeycomb MnO2/C micro nanosphere and microrod preparation method

A micro-nano-sphere and honeycomb-shaped technology, which is applied in the field of electrochemical material preparation, can solve the problem of low film electrode area and achieve the effect of rich pore size, simple preparation process and good conductivity

Inactive Publication Date: 2012-10-31
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
View PDF2 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although MnO 2 The specific capacitance of thin film electrodes is high, but when the active material per unit area increases and the film becomes thicker, the specific capacitance drops rapidly. Therefore, MnO 2 Thin film electrode area specific capacitance is not high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hollow honeycomb MnO2/C micro nanosphere and microrod preparation method
  • Hollow honeycomb MnO2/C micro nanosphere and microrod preparation method
  • Hollow honeycomb MnO2/C micro nanosphere and microrod preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] According to the ratio of the amount of substance 4:1 and MnO 2 Weigh 3% of the total amount of potassium permanganate, manganese chloride and graphite oxide, transfer the manganese chloride to a beaker filled with deionized water and stir it magnetically. After it is fully dissolved, add graphite oxide, and then slowly add potassium permanganate It is stirred and then transferred to a hydrothermal reactor with a filling rate of 40%. Then the hydrothermal reaction kettle was placed in an oven at 120 ℃ for hydrothermal reaction at a constant temperature for 3 h and then cooled to room temperature. The prepared product is washed and dried to obtain hollow honeycomb MnO 2 / C Micro and nano balls.

Embodiment 2

[0024] According to the ratio of the amount of substance 1:1 and MnO 2 Weigh 5% of the amount of potassium permanganate, manganese chloride and bamboo charcoal, transfer the manganese chloride to a beaker filled with deionized water and stir magnetically. After it is fully dissolved, add bamboo charcoal, then slowly add potassium permanganate and stir. , Then transferred to the hydrothermal reactor, the filling rate is 60%. Then the hydrothermal reaction kettle was placed in an oven at 150 ℃ for hydrothermal reaction for 6 h and then cooled to room temperature. The product is washed and dried to obtain bird's nest MnO 2 / C Micron rod material.

Embodiment 3

[0026] According to the ratio of the amount of the substance 0.25:1 and MnO 2 Weigh 9% of the total amount of potassium permanganate, manganese chloride and activated carbon, transfer the manganese chloride to a beaker filled with deionized water and stir magnetically. After it is fully dissolved, add activated carbon, then slowly add potassium permanganate and stir. , Then transferred to a hydrothermal reactor with a filling rate of 80%. Then the hydrothermal reaction kettle was placed in an oven at 150 ℃ for hydrothermal reaction for 6 h and then cooled to room temperature. The product is washed and dried to obtain bird's nest MnO 2 / C Micron rod material.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a hollow honeycomb MnO2 / C micro nanosphere and microrod preparation method. The preparation method comprises the following steps: (1) purifying carbon material; (2) adding manganese salt into deionized water, adding the purified carbon material after resolution, then adding potassium permanganate and mixing, and transposing the mixture in a hydro-thermal reaction kettle; (3) placing the hydro-thermal reaction kettle into a baking oven, and cooling the mixture to the ambient temperature after reaction for 1-15 hours under the hydro-thermal condition to obtain a hydro-thermal reaction product; and (4) repeatedly washing and filtering the hydro-thermal reaction product through the deionized water, then drying the obtained product, taking out the dried product and grinding to obtain hollow honeycomb MnO2 / C micro nanospheres and microrod materials shaped like bird' nests for super capacitors. The preparation method adopts a simple preparation technology, achieves short synthesis time and can prepare the hollow honeycomb MnO2 / C micro nanospheres and microrod materials. The hollow honeycomb MnO2 / C micro nanospheres are porous on the surface, adopt special hollow structures and have the diameter of about 500nm; and the microrod MnO2 has the diameter of about 30nm and the length of about 5um.

Description

Technical field [0001] The invention relates to the field of electrochemical material preparation, in particular to a hollow honeycomb MnO for supercapacitors with large specific capacity, good rate performance, long cycle life, low price and environmental protection 2 / C Preparation method of micro-nano balls and micro-rods. Background technique [0002] With the increasing demand for energy and increasing awareness of environmental protection in various countries, the development and utilization of environmentally friendly clean energy is particularly urgent. As a new type of energy storage device, supercapacitors have the advantages of high power density, fast charge and discharge rate, wide applicable temperature range, long cycle life, high safety factor, maintenance-free, economical and environmental protection, etc., are used in mobile communications, information technology, aviation There are a wide range of applications in aerospace and defense technology, especially the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042
Inventor 张勇李光胤霍庆媛王力臻张林森高海丽
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com