Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of doped modified electrolytic manganese dioxide and its preparation method and application

An electrolytic manganese dioxide and modification technology, applied in the electrolysis process, electrolysis components, circuits, etc., can solve the problems of high cost, complex liquid phase process, low doping rate, etc., achieve low cost, reduce Taylor effect, simple craftsmanship

Active Publication Date: 2021-05-11
湘潭电化科技股份有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the liquid phase method has complex process, high cost, and low doping rate, so it is difficult to achieve a uniform doping degree of the dopant in the electrolytic manganese dioxide.

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
  • A kind of doped modified electrolytic manganese dioxide and its preparation method and application
  • A kind of doped modified electrolytic manganese dioxide and its preparation method and application
  • A kind of doped modified electrolytic manganese dioxide and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0066] According to the first embodiment of the present invention, a kind of preparation method of doped modified electrolytic manganese dioxide is provided:

[0067] A method for preparing doped modified electrolytic manganese dioxide, the method comprising the following steps: 1) adding acid-insoluble powder to an acid electrolyte containing manganese sulfate to obtain an electrolytic suspension solution; 2) adding an electrolytic suspension solution Carrying out electrolysis; 3) stripping the electrolysis product from the electrolysis anode, and obtaining doped modified electrolytic manganese dioxide through rinsing, grinding and sieving.

[0068] Preferably, in step 1), the acid-insoluble powder is specifically acid-insoluble metal oxide powder.

[0069] Preferably, the metal oxide is one or more of alumina, titanium dioxide, niobium pentoxide, and tungsten trioxide.

[0070] Preferably, the metal oxide is a nanoscale metal oxide.

[0071] Preferably, the particle size o...

Embodiment 1

[0099] A method for preparing doped modified electrolytic manganese dioxide, the method comprising the following steps: 1) adding acid-insoluble powder to an acid electrolyte containing manganese sulfate to obtain an electrolytic suspension solution; 2) performing electrolytic suspension on the electrolytic suspension solution electrolysis; 3) stripping the electrolysis product from the electrolysis anode, and obtaining doped modified electrolytic manganese dioxide through rinsing, grinding and sieving.

Embodiment 2

[0101] A preparation method of doped modified electrolytic manganese dioxide, characterized in that the method comprises the following steps:

[0102] 1) adding alumina powder to the acid electrolyte containing manganese sulfate to obtain a suspension solution to be electrolyzed;

[0103] Wherein: the particle diameter of aluminum powder is 2 μm; The acid electrolyte solution containing manganese sulfate is the sulfuric acid solution containing manganese sulfate, the content A of sulfuric acid in the acid electrolyte solution containing manganese sulfate is 50g / L, the acid electrolyte solution containing manganese sulfate The content B of manganese sulfate is 40g / L; the amount C of aluminum powder added to the acid electrolyte containing manganese sulfate is 10g / L;

[0104] 2) Add the suspension solution to be electrolyzed into the electrolytic cell, and electrolyze the suspension solution; wherein: the current density D of the anode is 50A / m 2 ;

[0105] 3) The electrolytic...

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

A method for preparing doped modified electrolytic manganese dioxide, the method comprising the following steps: 1) adding acid-insoluble powder to an acid electrolyte containing manganese sulfate to obtain an electrolytic suspension solution; 2) performing electrolytic suspension on the electrolytic suspension solution electrolysis; 3) stripping the electrolysis product from the electrolysis anode, and obtaining doped modified electrolytic manganese dioxide through rinsing, grinding and sieving. The preparation method of the doped modified electrolytic manganese dioxide provided by the invention is to prepare the doped electrolytic manganese dioxide by electrolysis of an acidic manganese sulfate solution containing a certain amount of acid-insoluble metal oxide powder by means of a suspension electrolysis method. The dopant substance is located inside the electrolytic manganese dioxide particle, and the process is simple and suitable for industrial production.

Description

technical field [0001] The invention relates to a manganese dioxide and its preparation method and application, in particular to a doped modified electrolytic manganese dioxide and its preparation method, and its application to lithium manganate; it belongs to the technical field of battery materials. Background technique [0002] Lithium manganate (LiMn 2 o 4 ) cathode material has the advantages of high specific capacity, wide source of raw materials, low price, and environmental friendliness; it is widely used in electric tools, low-speed electric vehicles, logistics vehicles and other fields. However, due to the structural distortion caused by the Jahn-Teller effect, the structure of the lithium manganate cathode material is destroyed, resulting in poor cycle stability. In view of its shortcomings, many researchers have adopted different doping methods to dope metal elements to stabilize the structure of lithium manganese oxide materials. [0003] Lithium-ion batterie...

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 Patents(China)
IPC IPC(8): C25B1/21H01M4/505
CPCC25B1/21H01M4/505Y02E60/10
Inventor 周彤左炜侯丽丽
Owner 湘潭电化科技股份有限公司