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A kind of coral-shaped lithium ferrite powder and preparation method thereof

A lithium ferrite and coral-like technology, which is applied in the field of coral-like lithium ferrite powder and its preparation, can solve the problems of small specific surface area and achieve the effects of increased specific surface area, uniform grain size and short cycle time

Active Publication Date: 2018-08-07
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, LiFe prepared by these methods 5 o 8 Powder, small specific surface area

Method used

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  • A kind of coral-shaped lithium ferrite powder and preparation method thereof
  • A kind of coral-shaped lithium ferrite powder and preparation method thereof
  • A kind of coral-shaped lithium ferrite powder and preparation method thereof

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preparation example Construction

[0029] A three-dimensional sheet of LiFe 5 o 8 and preparation method thereof, comprising the following steps:

[0030] 1) According to LiFe 5 o 8 The molar ratio in weighs the Li that molar ratio is 1:5 respectively 2 CO 3 and Fe 2 o 3 , Li 2 CO 3 and Fe 2 o 3 Mixed quality A, then add NaCl and KCl with a molar ratio of 1:1, the mixed quality of NaCl and KCl is B, A=B, after mixing according to, material: ball stone: ethanol = 1:2:1 Proportionally carry out wet ball milling at a rotational speed of 400-600r / min for 4-6 hours to obtain slurry A with uniform mixing and fine particle size. Among them, the melting point of the mixed salt with a molar ratio of 1:1 is relatively low, and it is in a molten state at a relatively low temperature, which is Li 2 CO 3 and Fe 2 o 3 Molecules provide a liquid environment, which is conducive to their movement, contact and reaction.

[0031] 2) Dry the slurry A in a vacuum drying oven at 60-80° C. for 6-10 hours to obtain a u...

Embodiment 1

[0039] A three-dimensional sheet of LiFe 5 o 8 and preparation method thereof, comprising the following steps:

[0040] (1) will follow LiFe 5 o 8 The molar ratio in weighs the Li that molar ratio is 1:5 respectively 2 CO 3 and Fe 2 o 3 , then add NaCl and KCl (molar ratio is 1:1) of equal mass, after mixing according to, material: ball stone: the ratio of ethanol=1:2:1 carries out wet ball milling, and rotating speed is 400r / min ball milling 6h, obtains Mix evenly and finer particle size slurry A.

[0041] (2) Dry the slurry A in a vacuum oven at 60°C for 10 hours to obtain a uniformly mixed mixture B.

[0042] (3) Calcinate the mixture B at 700°C for 6h, and then wash the obtained product with distilled water to remove the salt, and dry it in an oven to obtain LiFe 5 o 8 Powder.

[0043] (4) Weigh the LiFe in step 3 5 o 8 Dissolve 0.2g of the powder in 100mL of N,N dimethylformamide, then pour it into a three-necked flask, and ultrasonicate for 30min.

[0044] ...

Embodiment 2

[0048] A three-dimensional flower-like LiFe 5 o 8 and preparation method thereof, comprising the following steps:

[0049] (1) will follow LiFe 5 o 8 The molar ratio in weighs the Li that molar ratio is 1:5 respectively 2 CO 3 and Fe 2 o 3 , then add NaCl and KCl of equal mass (the molar ratio is 1:1), after mixing, carry out wet ball milling according to the ratio of material: ball stone: ethanol=1:2:1, and the rotating speed is 500r / min ball milling 5h, obtains mixed Uniform, fine particle size slurry A.

[0050] (2) The slurry A was dried in a vacuum oven at 70°C for 8 hours to obtain a uniformly mixed mixture B.

[0051] (3) Calcinate the mixture B at 800°C for 5h, and then wash the obtained product with distilled water to remove the salt, and dry it in an oven to obtain LiFe 5 o 8 Powder.

[0052] (4) Weigh the LiFe in step 3 5 o 8 Dissolve 0.15g of the powder in 100mL of N,N dimethylformamide, then pour it into a three-necked flask, and ultrasonicate for 30m...

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Abstract

The invention provides coralloid lithium ferrate powder and a preparation method thereof. The method comprises the following steps: taking Li2CO3 and Fe2O3 as raw materials, then preparing LiFe5O8 powder according to a molten salt method, adopting a corrosion solvent, a reducer and a complexing agent for performing corrosion reaction, and adopting a one-step corrosion method for obtaining the three-dimensional coralloid lithium ferrate powder. According to the invention, the molten salt method is adopted for preparing spinel LiFe5O8 powder, the grain size is uniform, and the dispersity is better; and then, the corrosion is performed, and the corroded grains are uniform in dispersion under the synergic effect of the corrosion solvent, the reducer and the complexing agent, so that the specific surface area of the LiFe5O8 powder is greatly increased. The process is simple, and the period is short.

Description

【Technical field】 [0001] The invention belongs to the field of material science, and in particular relates to a coral-shaped lithium ferrite powder and a preparation method thereof. 【Background technique】 [0002] With economic development and population growth, energy shortages and environmental pollution problems (such as CO 2 The emission problem) is very serious; at the same time, the rapid development of electronic products and the enhancement of people's environmental awareness have prompted people to look for cleaner and cheaper sustainable energy. Therefore, renewable energy sources such as solar energy, electric energy, wind energy, and tidal energy have attracted a lot of attention. Then, among these renewable energy sources, solar energy and wind energy are affected by time and season. We need to reduce our dependence on these renewable energy sources. The need for clean, secure energy in the future has driven a new generation of energy storage devices such as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/00H01M4/525H01M10/0525
CPCC01G49/00C01P2002/32C01P2002/60C01P2002/72C01P2004/03C01P2004/30C01P2004/50C01P2004/51C01P2006/12H01M4/525H01M10/0525Y02E60/10
Inventor 杨海波董镜镜林营刘怡冉高淑雅
Owner SHAANXI UNIV OF SCI & TECH