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A kind of preparation method of manganese-cobalt-nickel base electrode for supercapacitor

A supercapacitor, cobalt-nickel-based technology, applied in the field of materials, can solve the problems of inability to achieve long-term operation of equipment, low operating voltage of superelectric cells, low energy density, etc., to achieve strong capacity expansion, good conductivity, raw materials easy-to-get effect

Active Publication Date: 2019-01-18
SUZHOU HAILINGDA EIECTRONIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Of course, supercapacitors also face some problems, mainly in: (1) The energy density is too low to achieve long-term operation of the equipment; (2) The self-discharge phenomenon is serious; (3) The working voltage of the superelectric cell is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Put 1L of concentrated sulfuric acid in ice bath for 1 hour, add 7g of sodium nitrate and 10g of natural flake graphite to the concentrated sulfuric acid in turn, stir well and then slowly add 48g, the speed of adding potassium permanganate is 4g every 5min, and continue after adding all Stir for 2h, the stirring speed is 50 rpm;

[0026] (2) Put the mixed suspension in step (1) into an oil bath at 37°C to heat and keep it warm, and keep stirring for 10 hours at a stirring speed of 50 rpm;

[0027] (3) Add 1L of deionized water to the insulated suspension in step (2), heat to 95°C, stir for 15 minutes at a stirring speed of 50 rpm, then add 500ml of deionized water and 200g of 30% hydrogen peroxide in sequence , natural cooling;

[0028] (4) The mixture in step (3) was centrifuged and precipitated, and the solid precipitate was taken and dried in an oven at 75°C for 4 hours to obtain graphene oxide;

[0029] (5) Dissolve 3 parts of manganese dioxide, 1 part of pot...

Embodiment 2

[0035] (1) Put 1L of concentrated sulfuric acid in ice bath for 1.4h, add 7.5g of sodium nitrate and 10.5g of natural flake graphite to the concentrated sulfuric acid in turn, stir well and then slowly add 48g, and add 4g of potassium permanganate at a rate of every 5min, all Continue to stir for 3 hours after adding, and the stirring speed is 50 rpm;

[0036] (2) Put the mixed suspension in step (1) into an oil bath at 37°C to heat and keep it warm, and keep stirring for 10.5 hours at a stirring speed of 50 rpm;

[0037] (3) Add 1L of deionized water to the insulated suspension in step (2), heat to 96°C, stir for 20 minutes at a stirring speed of 50 rpm, then add 500ml of deionized water and 200g of 30% hydrogen peroxide in sequence , natural cooling;

[0038] (4) The mixture in step (3) was centrifuged and precipitated, and the solid precipitate was taken and dried in an oven at 75°C for 4.3 hours to obtain graphene oxide;

[0039] (5) Dissolve 4 parts of manganese dioxide...

Embodiment 3

[0045] (1) Put 1L of concentrated sulfuric acid in ice bath for 1.8h, add 8g of sodium nitrate and 11g of natural flake graphite to the concentrated sulfuric acid in turn, stir well and then slowly add 48g, the speed of adding potassium permanganate is 4g every 5min, after adding all Stir continuously for 3h, and the stirring speed is 50 rpm;

[0046](2) Put the mixed suspension in step (1) into an oil bath at 37°C to heat and keep it warm, and keep stirring for 11 hours at a stirring speed of 50 rpm;

[0047] (3) Add 1L of deionized water to the insulated suspension in step (2), heat to 97°C, stir for 25 minutes at a stirring speed of 50 rpm, then add 500ml of deionized water and 200g of 30% hydrogen peroxide in sequence , natural cooling;

[0048] (4) The mixture in step (3) was centrifuged and precipitated, and the solid precipitate was taken and dried in an oven at 75°C for 4.7 hours to obtain graphene oxide;

[0049] (5) Dissolve 4 parts of manganese dioxide, 2 parts of...

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PUM

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Abstract

The invention discloses a super capacitor manganese cobalt nickel base electrode preparation method comprising the following steps: using low temperature-middle temperature-high temperature three-step oxidation treatment to process natural flake graphite so as to form oxidized graphene; using a precipitation method to react manganese cobalt components with the oxidized graphene so as to form a manganese cobalt composite graphene material; finally using a pressurization compressed tablet technology to coat the active material on a nickel substrate electrode, thus forming the super capacitor manganese cobalt nickel base electrode; the prepared super capacitor manganese cobalt nickel base electrode is stable in performance, excellent in conductivity, and strong in capacitance expansion capability; in addition, the preparation technology is low in consumption, feasible and safe, and has better industrialization application prospect; in addition, the invention also discloses the super capacitor manganese cobalt nickel base electrode applications in precision apparatus backup power supplies of a vacuum switch, an intelligent device, a static state memory and a program control switch.

Description

technical field [0001] The invention relates to the field of materials, in particular to a method for preparing a manganese-cobalt-nickel-based electrode for a supercapacitor. Background technique [0002] As an important backup power source, supercapacitors can prevent power interruptions while supplementing energy storage. Compared with traditional electrostatic capacitors, supercapacitors are not much different in principle. Also satisfy the law that the size of the capacitance is proportional to the facing area and inversely proportional to the distance between the two plates. However, the reason why supercapacitors are "super" is that porous activated carbon is used as an electrode material in commerce, and its surface area increases rapidly, and the distance between the two plates is only the relevant ionic radius, generally between 2-10 angstroms. These two absolute advantages make the storage capacity of supercapacitors far superior to traditional electrostatic capa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/30H01G11/32
CPCY02E60/13
Inventor 黄啸谷张其土
Owner SUZHOU HAILINGDA EIECTRONIC TECH CO LTD