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Iron-manganese-containing layered transition metal oxide precursor material as well as preparation method and application thereof

A transition metal and oxide technology, applied in the field of nanomaterials and electrochemistry, can solve problems such as the limitation of complexing agents, and achieve the effect of easy amplification, market promotion, and strong feasibility

Inactive Publication Date: 2021-02-19
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to develop a new complexing agent for the limitation of the complexing agent in the current industrial co-precipitation method so as to realize the complexation of different types or even multiple metal ions, and realize the complexation at a certain pH Co-precipitation to obtain iron-manganese-containing layered transition metal oxide precursor materials, and finally to obtain uniform layered oxide materials by calcination

Method used

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  • Iron-manganese-containing layered transition metal oxide precursor material as well as preparation method and application thereof
  • Iron-manganese-containing layered transition metal oxide precursor material as well as preparation method and application thereof
  • Iron-manganese-containing layered transition metal oxide precursor material as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0033] 1) Add 1L of deionized water into the reactor, turn on the water bath switch, adjust the temperature of the reactor to 50°C, and adjust the pH of the liquid in the reactor to 10;

[0034] 2) Add 2mol / L nickel-iron-manganese mixed sulfate solution, 0.05M sodium pyrophosphate complexing agent solution and 4mol / L potassium hydroxide solution into the ternary coprecipitation reactor through a peristaltic pump, wherein the metal salt nickel The ratio of iron to manganese is 1:1:1, adjust the flow rate of the two solutions to maintain the pH value of the whole system at 10.2, maintain the reaction temperature at 50°C, pass nitrogen protection during the feeding process, and stir for 12 hours;

[0035]3) After 12 hours of reaction, stop feeding and continue stirring to age the slurry for 20 hours;

[0036] 4) Pour the aged slurry into a beaker and wash it repeatedly with deionized water until the slurry is neutral;

[0037] 5) Filter the slurry in step 4), and dry the filter ...

Embodiment 2

[0043] 1) Add 1L of deionized water into the reactor, turn on the water bath switch, adjust the temperature of the reactor to 50°C, and adjust the pH of the liquid in the reactor to 10;

[0044] 2) Add 2mol / L calcium-iron-manganese mixed sulfate solution and 0.1mol / L sodium pyrophosphate complexing agent solution into the ternary coprecipitation reactor through a peristaltic pump, wherein the ratio of the metal salt calcium-iron-manganese in the raw material is 1 :1:1, while feeding 4mol / L potassium hydroxide solution to maintain the pH value of the whole system at 10.2, maintaining the reaction temperature at 50°C, feeding nitrogen protection during the feeding process, and stirring for 12 hours;

[0045] 3) After 12 hours of reaction, stop feeding and continue stirring to age the slurry for 20 hours;

[0046] 4) Pour the aged slurry into a beaker and wash it repeatedly with deionized water until the slurry is neutral;

[0047] 5) Filter the slurry in step 4), and dry the fi...

Embodiment 3

[0051] 1) Add 1L of deionized water into the reactor, turn on the water bath switch, adjust the temperature of the reactor to 50°C, and adjust the pH of the liquid in the reactor to 10;

[0052] 2) Put 2mol / L zinc-iron-manganese mixed sulfate solution and 0.05mol / L sodium pyrophosphate complexing agent solution into the ternary coprecipitation reaction kettle through a peristaltic pump, wherein the ratio of metal salt zinc-iron-manganese in the raw material is 1 :1:1, while feeding 4mol / L potassium hydroxide solution to maintain the pH value of the whole system at 10.2, maintaining the reaction temperature at 50°C, feeding nitrogen protection during the feeding process, and stirring for 12 hours;

[0053] 3) After 12 hours of reaction, stop feeding and continue stirring to age the slurry for 20 hours;

[0054] 4) Pour the aged slurry into a beaker and wash it repeatedly with deionized water until the slurry is neutral;

[0055] 5) Filter the slurry in step 4), and dry the fil...

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Abstract

The invention relates to an iron-manganese-containing layered transition metal oxide precursor material and a preparation method thereof. The iron-manganese-containing layered transition metal oxide precursor material can be used for preparing a sodium ion battery positive electrode active material. The general formula is M1-x-yFexMny(OH)2, wherein x is greater than or equal to 0 and less than 1,y is greater than or equal to 0 and less than 1, M is doped with metal elements, and is one or more of Ni<2+>, Ca<2+>, Mg<2+>, Zn<2+>, Co<2+>, Co<3+>, Ag<+>, Cr<2+>, Cr<3+>, Pb<2+>, Pb<4+>, Ba<2+>,W<2+>, Al<3+>, Ti<2+>, Ti<4+>, Cu<2+>, V<4+>, Zr<4+>, Nb<5+>, MO<5+>, Ru<4+>, and the material has unique nanospherical structure, uniform spherical distribution, and spherical particle size of 1-10 [mu]m. The method has the advantages that the method is high in feasibility and easy to amplify, industrialization of various or different kinds of layered transition metal oxides is achieved, and marketpopularization is facilitated.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials and electrochemistry, and specifically relates to an iron-manganese-containing layered transition metal oxide precursor material and a preparation method thereof. The material can be used to prepare positive electrode active materials for sodium-ion batteries. Background technique [0002] Sodium-ion batteries have attracted extensive attention from researchers because of their rich natural resources of sodium, long cycle life, wide temperature range, no memory effect, and no environmental pollution. As an ideal alternative energy storage for lithium-ion batteries, they have developed rapidly. In recent years, layered transition metal oxide cathode materials for sodium-ion batteries have attracted widespread attention. The main methods for synthesizing such cathode materials include solid-phase method, sol-gel method, spray-drying method and coprecipitation method. Due to the advantage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01M4/505H01M4/525H01M10/054
CPCC01G53/006C01P2002/72C01P2004/03C01P2004/04C01P2004/32H01M4/505H01M4/525H01M10/054Y02E60/10
Inventor 尤雅苏杭黄兴林雅
Owner WUHAN UNIV OF TECH
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