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Preparation method of MnCuZnFe2O4 lithium ion battery anode material

A technology for lithium ion batteries and anode materials, which is applied in the field of preparation of anode materials for lithium ion batteries, can solve problems such as low theoretical capacity, and achieve the effects of improving actual capacity, enhancing conductivity and long life

Inactive Publication Date: 2015-04-08
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Carbon materials have been used in commercial lithium-ion batteries due to their high specific capacity, and exhibit good electrochemical behavior, but still have the defect of low theoretical capacity.

Method used

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  • Preparation method of MnCuZnFe2O4 lithium ion battery anode material
  • Preparation method of MnCuZnFe2O4 lithium ion battery anode material
  • Preparation method of MnCuZnFe2O4 lithium ion battery anode material

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Embodiment 1

[0024] MnCuZnFe of Example 1 2 o 4 The preparation method of lithium ion battery anode material comprises the following steps:

[0025] 1) Weigh 0.01 mol of MnSO 4 ·H 2 O, 0.0025mol of CuSO 4 ·5H 2 O, 0.0125 mol of ZnSO 4 ·7H 2 O and 0.05 mol of FeSO 4 ·7H 2 O was dissolved in deionized water and stirred to form a mixed solution;

[0026] 2) Add ammonium bicarbonate solution dropwise to the mixed solution prepared in step 1), and keep stirring;

[0027] 3) Put the mixed solution obtained in step 2) into an incubator, and conduct a hydrothermal reaction at 180°C for 24 hours;

[0028] 4) Filter out the precipitate obtained in step 3), then wash and centrifuge for 6-8 times until the pH is about 7.0, and then dry at 80°C for 24 hours;

[0029] 5) The powder obtained in step 4) was annealed at 600°C for 2 hours under the protection of nitrogen to obtain MnCuZnFe, an anode material for lithium-ion batteries 2 o 4 Powder.

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Abstract

The invention discloses a preparation method of MnCuZnFe2O4 lithium ion battery anode material. The preparation method includes the steps of firstly, weighing MnSO4*H2O, CuSO4*5 H2O, ZnSO4*7 H2O and FeSO4*7 H2O to dissolve in deionized water, and mixing to obtain mixed solution; secondly, dropwise adding ammonium bicarbonate solution into the mixed solution obtained in the first step; thirdly, placing the mixed solution obtained in the second step into a constant temperature box for hydrothermal reaction; fourthly, filtering sediment obtained in the third step, and then rinsing, centrifuging, and drying; and fifthly annealing powder obtained in the fourth step under protection of nitrogen. The hydrothermal reaction is used to allow Cu and Mn to be doped into ferrite ZnFe2O4, and accordingly MnCuZnFe2O4 powder is prepared as the lithium ion battery anode material, actual capacity of the battery can be improved, and circulating service life of the battery can be prolonged greatly.

Description

technical field [0001] The invention relates to a preparation method of an anode material of a lithium ion battery, in particular to a MnCuZnFe 2 o 4 A method for preparing an anode material for a lithium ion battery. Background technique [0002] Since Gaston Plante proposed the concept of lead-acid battery in 1859, the chemical power industry has been exploring new secondary batteries with high specific energy and long cycle life. In 1990, Japan's SONY company took the lead in successfully developing and commercializing lithium-ion batteries, which showed broad application prospects and potential huge economic benefits in portable electronic equipment, electric vehicles, space technology, national defense industry, etc. A research hotspot that has been widely concerned in the past year. [0003] One of the keys to the development of lithium-ion batteries is to find suitable anode materials, so that the battery has a high enough lithium intercalation capacity and good li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/50H01M4/52
CPCY02E60/10
Inventor 李长明孙柏
Owner SOUTHWEST UNIV