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

Self-support ZnMn2O4 multistage hollow microsphere and preparation method thereof

A self-supporting, hollow technology, applied in the direction of manganate/permanganate, etc., can solve the problems that the microspheres cannot form a good electron transmission channel, the structure of the microspheres is easily damaged, and there is no structural correlation, etc., to achieve device stability, The effect of good stability and convenient electrode

Active Publication Date: 2014-06-25
ZHEJIANG UNIV
View PDF1 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently prepared ZnMn 2 o 4 Multi-level hollow microspheres are mostly dispersed isolated microspheres, which have no structural relationship with each other, and there are many difficulties in the preparation of electrode materials. At present, the preparation of electrode materials usually requires mixing, stacking, tableting or cross-linking with organic substances to separate them. Microspheres, etc., the structure of the microspheres itself is easily destroyed and a good electron transport channel cannot be formed between the microspheres, resulting in low kinetic characteristics and poor stability, thus limiting its application

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
  • Self-support ZnMn2O4 multistage hollow microsphere and preparation method thereof
  • Self-support ZnMn2O4 multistage hollow microsphere and preparation method thereof
  • Self-support ZnMn2O4 multistage hollow microsphere and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] A self-supporting ZnMn 2 o 4 The preparation method of multilevel hollow microspheres comprises the following steps:

[0028] Step (1). Adding the polymer polymer to the organic solvent to form a transparent solution;

[0029] The polymer polymer is polyvinylpyrrolidone, and 0.1-0.3 g is added to every 100ml of organic solvent; the organic solvent is ethylene glycol;

[0030] Step (2). Divalent zinc salt and divalent manganese salt are added to the transparent solution and completely dissolved to obtain a mixed solution; the concentration of the divalent zinc salt in the mixed solution is 0.5-1.5 mM; the concentration of the divalent manganese salt is 1.5- 3 mM;

[0031] Described divalent zinc salt and divalent manganese salt are divalent zinc salt and divalent manganese salt that can be dissolved into ethylene glycol; In the transparent solution in described step (2), zinc ion and manganese ion mol ratio are 1:2;

[0032] Step (3). Transfer the transparent soluti...

Embodiment 1

[0036] Step (1). Dissolve polyvinylpyrrolidone in ethylene glycol at a ratio of 0.22 g / 100ml to form a transparent solution;

[0037] Step (2). Zn(CH 3 COO) 2 2H 2 O and Mn(CH 3 COO) 2 4H 2 O was dissolved into a clear solution in proportions of 1 mM / 100ml and 2 mM / 100ml, respectively.

[0038] In the solution in the described step (2), Zn(CH 3 COO) 2 2H 2 O and Mn(CH 3 COO) 2 4H 2 O molar ratio is 1 / 2;

[0039] Step (3). Transfer the transparent solution that completed step (2) to a container, and then put it in a drying oven at 170 °C for 80 min. Cool naturally to 80 °C and take out the container.

[0040] Step (4). Transfer the suspension in the container to a centrifuge tube and centrifuge at 7000 rpm for 3 minutes, so that the suspension in the centrifuge tube is layered up and down. Pour off the upper layer of liquid, add absolute ethanol, shake evenly and re-centrifuge; repeat The product was obtained after washing with absolute ethanol three times.

[00...

Embodiment 2

[0044] Step (1). Dissolve polyvinylpyrrolidone in ethylene glycol at a ratio of 0.1 g / 100ml to form a transparent solution;

[0045] Step (2). Zn(NO 3 ) 2 and Mn(NO 3 ) 2 4H 2 O was dissolved into the above solution at the ratio of 0.5 mM / 100ml and 1.5 mM / 100ml respectively.

[0046] In the solution in the described step (2), Zn(NO 3 ) 2 and Mn(NO 3 ) 2 4H 2 O molar ratio is 1 / 2;

[0047] Step (3). Transfer the transparent solution that completed step (2) to a container, and then put it in a drying oven at 160 °C for 70 min. Cool naturally to 70 °C and take out the container.

[0048] Step (4). Transfer the suspension in the container to a centrifuge tube and centrifuge at 6000 rpm for 5 minutes, so that the suspension in the centrifuge tube is layered up and down. Pour off the upper liquid, add absolute ethanol, shake evenly and re-centrifuge; repeat The product was obtained after washing with absolute ethanol twice.

[0049] Step (5). The product of step (4) w...

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 self-support ZnMn2O4 multistage hollow microsphere and a preparation method thereof. The self-support ZnMn2O4 multistage hollow microsphere comprises multistage hollow microspheres and nanometer branch knots for supporting, wherein the microspheres are supported and connected by the naturally growing nanometer branch knots, and thus a complete three-dimensional building structure is formed; the multistage hollow microspheres comprise mesopore sphere shells and mesopore inner cores. The self-support ZnMn2O4 multistage hollow microsphere is completed by a hydrothermal combined annealing method. According to the self-support ZnMn2O4 multistage hollow microsphere, the defect of the hollow microsphere on the aspect of the preparation of an electrode is overcome, a structure can be prevented from being damaged by accumulation and pressing in an electrode preparation process, and electron conduction and liquid diffusion between the microspheres can be realized, so that the prepared electrode is simple and convenient, is good in stability, and capable of fully taking the structure advantage of the microspheres in the application to electronics, catalysis, and energy storage and conversion. The preparation method disclosed by the invention is simple, free from pollution, rich in raw materials, low in price, and suitable for preparation of a low-cost electrode material.

Description

technical field [0001] The invention belongs to the technical field of preparation of micro-nano materials, in particular to a self-supporting ZnMn 2 o 4 Multilevel hollow microsphere and its preparation method. Background technique [0002] ZnMn 2 o 4 It belongs to the magnetic compound with spinel structure, which has the characteristics of abundant storage, low price, environmental friendliness, multivalent state, and outstanding Jahn–Teller effect. It has attracted wide interest in the fields of electronics, catalysis, magnetism, and energy storage and conversion. ZnMn 2 o 4 Due to its unique structural characteristics, multi-level hollow microspheres are very attractive for applications in the above-mentioned fields. Currently prepared ZnMn 2 o 4 Multi-level hollow microspheres are mostly dispersed isolated microspheres, which have no structural relationship with each other, and there are many difficulties in the preparation of electrode materials. At present, t...

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
IPC IPC(8): C01G45/12
Inventor 黄靖云赵明岗马烨叶志镇
Owner ZHEJIANG UNIV