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Method for preparing Mn2O3 porous micro-nano structure material having controllable morphology

A micro-nano structure and morphology technology, applied in manganese oxide/manganese hydroxide, structural parts, secondary batteries, etc., can solve the problem of rare reports of manganese trioxide anode materials, difficulties in the insertion and extraction of sodium ions, and influence on materials. performance and other issues, to achieve the effect of improving electrochemical performance, maintaining structural integrity, and improving reactivity

Inactive Publication Date: 2017-06-16
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the radius of sodium ions is much larger than that of lithium ions, which makes it difficult to intercalate and deintercalate sodium ions in battery electrode materials. Therefore, it is a major problem in the development of sodium-ion batteries to develop an electrode material for sodium-ion batteries with excellent performance. It is also a scientific problem that needs to be solved urgently
[0003] Dimanganese trioxide is an important semiconductor material with rich content, and the research on lithium batteries and supercapacitors is relatively in-depth, but there are few reports on manganese trioxide as the negative electrode material of sodium-ion batteries
The study found that the theoretical specific capacity of manganese trioxide as a negative electrode material for sodium ion batteries is relatively high, but due to the large volume of sodium ions, the electrode material has a large volume change during intercalation and extraction, resulting in structural collapse. Material properties

Method used

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  • Method for preparing Mn2O3 porous micro-nano structure material having controllable morphology
  • Method for preparing Mn2O3 porous micro-nano structure material having controllable morphology
  • Method for preparing Mn2O3 porous micro-nano structure material having controllable morphology

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Embodiment 1

[0035] a kind of Mn 2 o 3 Porous micro-nano structure material, its preparation method comprises the following steps:

[0036] 1) Add 0.735g of manganese acetate tetrahydrate into 50mL of deionized water, and stir evenly to obtain solution A;

[0037] 2) Add 1.1g of ammonium bicarbonate into 50mL of deionized water, and stir evenly to obtain solution B;

[0038] 3) Under stirring conditions, add solution A dropwise to solution B (the addition rate of manganese acetate solution is 0.1mL / s), and then stir for 30 minutes to produce a white precipitate, then perform suction filtration and place in a 40°C oven Dry to get manganese carbonate;

[0039] 4) the manganese carbonate obtained in step 3) is calcined in an air atmosphere to obtain Mn 2 o 3 Porous micro-nano structure material (porous manganese trioxide), wherein the calcination treatment system is: heating at a rate of 3°C / min to 500°C for 4h.

[0040] The obtained manganese carbonate of the present embodiment is carr...

Embodiment 2

[0042] a kind of Mn 2 o 3 Porous micro-nano structure material, its preparation method comprises the following steps:

[0043] 1) Add 0.735g of manganese acetate tetrahydrate into 100mL of deionized water, and stir evenly to obtain solution A;

[0044] 2) Add 0.6g of ammonium bicarbonate into 100mL of deionized water, and stir evenly to obtain solution B;

[0045] 3) Under stirring conditions, add solution A dropwise to solution B (the addition rate of manganese acetate solution is 3.3mL / s), and then stir for 30 minutes to produce a white precipitate, then perform suction filtration and place in an oven at 50°C Dry to get manganese carbonate;

[0046] 4) the manganese carbonate obtained in step 3) is calcined in an air atmosphere to obtain Mn 2 o 3 Porous micro-nano structure material (porous manganese trioxide), wherein the calcination treatment system is: heating at a rate of 3°C / min to 500°C for 4h.

[0047] The obtained manganese carbonate of the present embodiment i...

Embodiment 3

[0049] a kind of Mn 2 o 3 Porous micro-nano structure material, its preparation method comprises the following steps:

[0050] 1) Add 0.735g of manganese acetate tetrahydrate into 400mL of deionized water, and stir evenly to obtain solution A;

[0051] 2) Add 1.1g of ammonium bicarbonate into 400mL of deionized water, and stir evenly to obtain solution B;

[0052] 3) Under stirring conditions, quickly add solution A to solution B (the addition rate of manganese acetate solution is 100mL / s), and then stir for 5 minutes to produce a white precipitate, then carry out suction filtration, and place it in a 60°C oven to dry. get manganese carbonate;

[0053] 4) the manganese carbonate obtained in step 3) is calcined in an air atmosphere to obtain Mn 2 o 3 Porous micro-nano structure material (porous manganese trioxide), wherein the calcination treatment system is: heating at a rate of 3°C / min to 550°C for 3h.

[0054] The obtained manganese carbonate of the present embodiment ...

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Abstract

The invention discloses a method for preparing a Mn2O3 porous micro-nano structure material having controllable morphology. The method comprises that ammonium bicarbonate and manganese acetate as raw materials in water as a solvent undergo a reaction under control of concentrations of the two raw materials, a mixing rate and reaction time to produce manganese carbonate precursors having different main body morphologies, and the manganese carbonate precursors are sintered at a high temperature to form a Mn2O3 porous negative electrode material having a controllable main body structure. The Mn2O3 material microstructure can be controlled and changed from a porous ball to a porous cube and has the sizes of 1-1.5 microns and mesoporous sizes of 10-30nm. The method has the advantages of common and nontoxic raw materials, simple and easy reaction, high conversion rate, large yield, industrial production feasibility and excellent performances in the field of sodium ion batteries.

Description

technical field [0001] The invention belongs to the field of chemical preparation of nanometer materials and synthesis of battery electrode materials, and in particular relates to a method for preparing a porous micro-nano structure material of manganese trioxide with controllable morphology. Background technique [0002] Lithium-ion batteries are now widely used in mobile electronic devices, such as notebook computers, mobile phones, etc., and the research on the application of electric vehicles has also achieved gratifying results. However, with the popularization of lithium-ion batteries, especially the development and application of electric vehicles, the consumption of lithium resources is huge, and the current recycling process for discarded lithium-ion batteries is not mature, so finding a replacement for lithium-ion Resources are a problem that researchers are more concerned about now. Sodium-ion batteries have become a research hotspot for a new generation of secon...

Claims

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Application Information

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IPC IPC(8): C01G45/02H01M4/505H01M10/054
CPCC01G45/02C01P2002/72C01P2004/03C01P2004/61C01P2006/17H01M4/505H01M10/054Y02E60/10
Inventor 李昱黄华文王佩琪韦方艳刘婧郑先锋苏宝连
Owner WUHAN UNIV OF TECH
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