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Preparation method of lithium battery negative electrode material iron-based binary composite metal oxide

A negative electrode material, binary composite technology, applied in battery electrodes, electrical components, secondary batteries, etc., can solve the problems of complex operation steps, difficult to popularize on a large scale, difficult to control reaction conditions, etc. Easy-to-control conditions and uniform results

Inactive Publication Date: 2016-05-11
WUHU ETC BATTERY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing preparation methods of iron-based binary composite metal oxides are often complicated in operation steps, the reaction conditions are not easy to control, and it is difficult to promote them on a large scale.

Method used

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preparation example Construction

[0013] The invention provides a method for preparing an iron-based binary composite metal oxide as a lithium battery negative electrode material, comprising the following steps:

[0014] Step 1. Prepare polymer microemulsion beads with a particle size of 50-500 nm by emulsion polymerization, and centrifuge the polymer microemulsion beads to obtain a template material with long-range order and reverse opal structure; M source compound, iron The source compound is mixed according to the ratio of the amount of substances M: Fe=0.95~1.05:1.95~2.05 and prepared into an alcohol solution or aqueous solution with a total concentration of metal ions of 1~3mol / L, and the M is a transition metal other than iron. any one;

[0015] Step 2. Soak the template material obtained in step 1 in the alcohol solution or aqueous solution obtained in step 1 for 10 to 60 minutes, then suction filter, and then dry the solid obtained after suction filtration at 50 to 100°C for 2 to 14 hours;

[0016] S...

Embodiment 1

[0030] Polymethyl methacrylate microemulsion beads with a particle size of 50nm were prepared by emulsion polymerization, and the polymethyl methacrylate microemulsion beads were centrifuged to form template materials with long-range order and anti-opal structure; The source compound and the iron source compound are mixed according to the ratio of the amount of substances Zn:Fe=0.95:1.95 and prepared into an ethylene glycol and methanol solution with a total metal ion concentration of 1mol / L, and the volume ratio of the solvent ethylene glycol and methanol is 1:2 , the M source compound is one or more of the acetylacetonate compound, acetic acid compound or nitric acid compound of M, and the iron source compound is one or more of the acetylacetonate compound, acetic acid compound or nitric acid compound of Fe ;

[0031]Step 2. Soak the template material obtained in step 1 in the alcohol solution or aqueous solution obtained in step 1 for 10 minutes, then suction filter, and th...

Embodiment 2

[0034] Polymethyl methacrylate microemulsion beads with a particle size of 500nm were prepared by emulsion polymerization, and the polymethyl methacrylate microemulsion beads were centrifuged to obtain template materials with long-range order and anti-opal structure; the copper source Compounds and iron source compounds are mixed according to the ratio of the amount of substances Cu: Fe=1.05:2.05 and prepared into an aqueous solution with a total concentration of metal ions of 3mol / L. The M source compound is an acetylacetonate compound, an acetic acid compound or a nitric acid compound. One or more of them, the iron source compound is one or more of Fe acetylacetonate compounds, acetic acid compounds or nitric acid compounds;

[0035] Step 2. Soak the template material obtained in step 1 in the alcohol solution or aqueous solution obtained in step 1 for 10-60 minutes, then suction filter, and then dry the solid obtained after suction filtration at 100° C. for 14 hours;

[003...

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Abstract

The invention provides a preparation method of lithium battery negative electrode material iron-based binary composite metal oxide with small particle size and a mesoporous open-framework structure. The method comprises the following steps: preparing polymer microemulsion microspheres with the particle size of 50 to 500nm, and centrifuging to obtain a template material; mixing M source compounds with iron source compounds and preparing into a solution with the total concentration of metal ions of 1 to 3 mol / L; soaking the template material into the solution, and performing suction filtration to obtain a solid and drying; calcining the solid subjected to drying; cooling to obtain black powder, namely MFe2O4. The preparation method of the lithium battery negative electrode material iron-based binary composite metal oxide is simple in process, the reaction conditions are easy to control, the prepared MFe2O4 is uniform in quality, good in appearance, few in defects, and good in lithium storage performance, the particle diameter is 20 to 30nm, and the mesoporous open-framework structure is obtained.

Description

technical field [0001] The invention relates to a lithium battery, in particular to a preparation method of an iron-based binary composite metal oxide for the negative electrode material of the lithium battery. Background technique [0002] The current commercial lithium-ion batteries used in lithium-ion batteries mainly use carbon-based materials as negative electrodes. This type of negative electrode material has the disadvantages of low specific capacity, fast capacity decay during charging and discharging at high rates, and low safety performance. Therefore, it cannot meet the development requirements of high-power, high-capacity, long-life, and high-safety lithium-ion batteries. Looking at the development trend of lithium-ion batteries, the research direction of lithium-ion battery anode materials in the future is: on the one hand, modify the existing carbon materials, such as surface treatment, mechanical ball milling, doping and other methods to improve their electroc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/52H01M10/0525
CPCH01M4/52H01M10/0525Y02E60/10
Inventor 唐姣君余良浩游坤
Owner WUHU ETC BATTERY LTD
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