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A lithium ion battery anode material znco 2 o 4 Preparation method of nanorods

A technology for lithium-ion batteries and negative electrode materials, which is applied in battery electrodes, nanotechnology, secondary batteries, etc., can solve the problems of large volume change and low conductivity, and achieves simple preparation process, increased contact area, and mild reaction conditions. Effect

Active Publication Date: 2021-10-12
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

ZnCo 2 o 4 As an electrode material, there are also many problems to be solved, such as low conductivity, large volume change during charging and discharging, etc.

Method used

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  • A lithium ion battery anode material znco <sub>2</sub> o <sub>4</sub> Preparation method of nanorods
  • A lithium ion battery anode material znco <sub>2</sub> o <sub>4</sub> Preparation method of nanorods
  • A lithium ion battery anode material znco <sub>2</sub> o <sub>4</sub> Preparation method of nanorods

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Experimental program
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Effect test

Embodiment 1

[0033] A lithium ion battery negative electrode material ZnCo 2 o 4 The preparation method of nanorods specifically includes the following steps:

[0034] (1) Dissolve 1 mmol of zinc acetate and 2 mmol of cobalt acetate in ethanol, and then dissolve polyvinylpyrrolidone (PVP) in ethanol to obtain a colorless and transparent solution;

[0035] (2) Put the colorless and transparent solution into a three-necked round-bottomed flask, and reflux at 90°C for 5 hours under magnetic stirring to obtain a white precipitate. Wash the white precipitate with hot ethanol and water several times and dry to obtain a one-dimensional structure ZnCo 2 o 4 Precursor;

[0036] (3), the obtained ZnCo 2 o 4 The precursor is calcined in air atmosphere to produce ZnCo 2 o 4 Nanorods, wherein the calcination temperature is 300° C., and the calcination time is 10 h.

[0037] See figure 1 , FESEM photograph of ZnCo2O4 precursor, ZnCo obtained in step (2) 2 o 4 The precursor consists of nanoro...

Embodiment 2

[0042] A lithium ion battery negative electrode material ZnCo 2 o 4 The preparation method of nanorods specifically includes the following steps:

[0043] (1) Dissolve 2 mmol of zinc nitrate and 4 mmol of cobalt nitrate in ethanol, and then dissolve cetyltrimethylammonium bromide (CTAB) in ethanol to obtain a colorless and transparent solution;

[0044](2) Put the colorless and transparent solution into a three-necked round-bottomed flask, and reflux at 80°C for 6 hours under magnetic stirring to obtain a white precipitate. Wash the white precipitate several times with hot ethanol and water and dry to obtain a one-dimensional structure ZnCo 2 o 4 Precursor;

[0045] (3), the obtained ZnCo 2 o 4 The precursor is calcined in air atmosphere to produce ZnCo 2 o 4 Nanorods, wherein the calcination temperature is 600°C and the calcination time is 2h.

[0046] See Figure 5 , the FESEM image of the prepared ZnCo2O4 material, it can be seen from the figure that the morpholog...

Embodiment 3

[0049] A lithium ion battery negative electrode material ZnCo 2 o 4 The preparation method of nanorods specifically includes the following steps:

[0050] (1) Dissolve 5 mmol of zinc sulfate and 10 mmol of cobalt sulfate in ethanol, and then dissolve sodium dioctyl sulfosuccinate (NaAOT) in isooctane to obtain a colorless and transparent solution;

[0051] (2) Put the colorless and transparent solution into a three-necked round-bottomed flask, and reflux for 3 hours under magnetic stirring at 100°C to obtain a white precipitate. Wash the white precipitate several times with hot ethanol and water and dry to obtain a one-dimensional structure ZnCo 2 o 4 Precursor;

[0052] (3), the obtained ZnCo 2 o 4 The precursor is calcined in air atmosphere to produce ZnCo 2 o 4 Nanorods, wherein the calcination temperature is 500°C and the calcination time is 3h.

[0053] See Figure 7 , the FESEM image of the prepared ZnCo2O4 material, it can be seen from the figure that the morp...

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Abstract

The invention discloses a lithium ion battery negative electrode material ZnCo 2 o 4 The preparation method of nanorods, first dissolves zinc salt and cobalt salt in an organic solvent with a molar ratio of 1:2, and dissolves a surfactant in an organic solvent to obtain a colorless and transparent solution; then put the colorless and transparent solution into In a reaction vessel, and reflux reaction at 60-150°C for 3-10h under magnetic stirring conditions, a white precipitate was obtained, and the white precipitate was washed to obtain ZnCo 2 o 4 Precursor, finally ZnCo 2 o 4 The precursor is calcined in air atmosphere to produce ZnCo 2 o 4 Nano stave. The present invention prepares ZnCo with one-dimensional porous structure by the method of reflux recrystallization 2 o 4 Nanorods, in which the one-dimensional structure can shorten the diffusion path of lithium ions, and the porous structure can suppress the volume strain during charge and discharge to improve the ZnCo 2 o 4 Electrochemical properties of negative electrode materials.

Description

technical field [0001] The invention relates to the field of battery material preparation, in particular to a lithium-ion battery negative electrode material ZnCo 2 o 4 Preparation method of nanorods. Background technique [0002] With the wide application of lithium-ion batteries in the field of power batteries, the requirements for the energy density of lithium-ion batteries are getting higher and higher. Therefore, electrode materials with high specific capacity, high rate capability and long cycle life have attracted extensive attention. Graphite negative electrode is currently the main material for lithium-ion battery negative electrode materials, due to its low theoretical capacity (374 mAh g -1 ) and cannot meet the needs of current development. Therefore, it is necessary to find better alternative anode materials. Among them, spinel-structured binary transition metal oxide materials have attracted the interest of researchers due to their high theoretical capacit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/00H01M4/52H01M10/0525B82Y40/00
CPCY02E60/10
Inventor 王强曾晖
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY