Preparation method of multi-channel surface modified amorphous iron oxide nanospheres

A technology of surface modification and amorphous state, which is applied in the field of preparation of lithium-ion battery negative electrode and multi-channel surface modified amorphous Fe2O3 nanosphere material, can solve the problems of high experimental cost and complicated operation, and achieve high repeatability, The preparation process is simple and the effect of reducing structural stress/strain

Pending Publication Date: 2022-01-28
JINGDEZHEN CERAMIC INSTITUTE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods either involve complicated manipulations or organic solvents, resulting in high experimental costs

Method used

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  • Preparation method of multi-channel surface modified amorphous iron oxide nanospheres
  • Preparation method of multi-channel surface modified amorphous iron oxide nanospheres
  • Preparation method of multi-channel surface modified amorphous iron oxide nanospheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] S1: Dissolve 0.226g of analytically pure potassium ferricyanide and 0.026g of ammonium dihydrogen phosphate into 45ml of deionized water, stir at room temperature at 550rmp for 10min, and obtain a clear liquid.

[0036]S2: Transfer the liquid obtained above to a polytetrafluoroethylene autoclave (total capacity: 100ml), and keep it at 180°C for 6h with a heating rate of 6°C / min, then wait for the reactant to cool down to room temperature naturally, take out mixture.

[0037] S3: The above mixture was centrifuged and washed three times with deionized water and absolute ethanol respectively, and the obtained powder was dried in a drying oven at 80°C for 10 hours to obtain multi-channel surface-modified amorphous Fe 2 o 3 nanosphere material.

Embodiment 2

[0039] S1: Dissolve 0.326g of analytically pure potassium ferricyanide and 0.043g of ammonium dihydrogen phosphate into 55ml of deionized water, stir at room temperature at 550rmp for 20min, and obtain a clear liquid.

[0040] S2: Transfer the liquid obtained above to a polytetrafluoroethylene autoclave (total capacity of 100ml), and keep it at 190°C for 6h with a heating rate of 6°C / min, then wait for the reactants to cool down to room temperature naturally, take out mixture.

[0041] S3: The above mixture was centrifuged and washed three times with deionized water and absolute ethanol respectively, and the obtained powder was dried in a drying oven at 100°C for 8 hours to obtain multi-channel surface-modified amorphous Fe 2 o 3 nanosphere material.

Embodiment 3

[0043] S1: Dissolve 0.376g of analytically pure potassium ferricyanide and 0.053g of ammonium dihydrogen phosphate into 65ml of deionized water, and stir at room temperature for 30min at 550rmp to obtain a clear liquid.

[0044] S2: Transfer the liquid obtained above to a polytetrafluoroethylene autoclave (total capacity: 100ml), and keep it at 200°C for 6h with a heating rate of 6°C / min, then wait for the reactant to cool down to room temperature naturally, and take it out mixture.

[0045] S3: The above mixture was centrifuged and washed three times with deionized water and absolute ethanol respectively, and the obtained powder was dried in a drying oven at 80°C for 12 hours to obtain multi-channel surface-modified amorphous Fe 2 o 3 nanosphere material.

[0046] Such as figure 1 As shown, the multi-channel surface modified amorphous Fe obtained in Example 3 2 o 3 In the XRD pattern of the nanosphere material, there is no obvious diffraction peak in the XRD pattern of t...

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Abstract

The invention discloses a preparation method of multi-channel surface modified amorphous iron oxide nanospheres. The preparation method comprises the following specific steps: (1) preparing a precursor solution; (2) transferring the precursor solution to a hydrothermal kettle, setting the temperature to be 180-200 DEG C, and carrying out hydrothermal treatment for 1-6 hours; (3) repeatedly centrifuging and washing the precipitate to remove redundant reaction ions; and (4) drying for 8-12 h at a drying temperature of 80-110 DEG C. According to the invention, iron oxide nanoparticles are prepared by adopting a hydrothermal method, and the multi-channel surface-modified amorphous iron oxide nanospheres are obtained by utilizing a synergistic effect of curing and hydrogen ion etching in a hydrothermal reaction; and the multi-channel surface-modified amorphous iron oxide nanospheres can be used as a lithium ion battery negative electrode material to obtain relatively good electrochemical performance, which is of great significance in further development of the iron oxide amorphous material in the field of lithium ion batteries.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a multi-channel surface modified amorphous Fe 2 o 3 The preparation method of the nanosphere material, and it is applied to the negative electrode of lithium ion battery. Background technique [0002] In recent years, the excessive use of fossil fuels has caused increasingly serious environmental problems such as air pollution and global warming. The use of electric motors to replace internal combustion engines in many countries has dramatically increased the need for energy storage devices for power supplies. Lithium-ion batteries (LIBs), as efficient energy storage devices, have attracted much attention due to their high energy density, power density, and long cycle life, and are widely used in portable electronic devices and electric vehicles (EVs). Energy storage devices require the use of rational electrode material composition designs and storage of large am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06B82Y40/00H01M4/48H01M10/0525
CPCC01G49/06H01M4/483H01M10/0525B82Y40/00H01M2004/027C01P2002/72C01P2004/03C01P2004/04C01P2004/32C01P2004/62Y02E60/10
Inventor 余石金朱文珍朱华高皓童家浩陈天瑞何璇男韦全亚
Owner JINGDEZHEN CERAMIC INSTITUTE
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