MNO, a negative electrode material for sodium ion batteries x preparation method

A sodium-ion battery and negative electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of difficult large-scale factory production, expensive graphene raw materials, complicated preparation process, etc., to achieve the benefit of embedding The effects of detachment, increased active specific surface area, and simple preparation process

Active Publication Date: 2020-05-12
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of this method is relatively complicated, and graphene is expensive as a raw material, and it is difficult to produce it in a large-scale factory

Method used

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  • MNO, a negative electrode material for sodium ion batteries <sub>x</sub> preparation method
  • MNO, a negative electrode material for sodium ion batteries <sub>x</sub> preparation method
  • MNO, a negative electrode material for sodium ion batteries <sub>x</sub> preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) getting manganese acetate and ammonium persulfate to be mixed with the manganese acetate solution of 0.12% and the ammonium persulfate solution of 0.11% in mass fraction respectively;

[0026] 2) Disperse the sodium lauryl sulfate in the manganese acetate solution, and magnetically stir until it is completely dissolved to prepare a mixed solution with a mass fraction of sodium lauryl sulfate of 1.96%;

[0027] 3) Take 60ml of ammonium persulfate solution and add it dropwise into 100ml of the mixed solution with a burette, and stir for 2 hours until the system is uniform;

[0028] 4) Move the homogeneously dissolved system to an ultrasonic cleaning machine with a power of 40W for ultrasonic treatment for 3 hours until a black precipitate is produced;

[0029] 5) The black precipitate obtained in step 4) is alternately washed with water and acetone, filtered, and dried to obtain MnOx, a negative electrode material for a sodium ion battery.

Embodiment 2

[0031] 1) getting manganese acetate and ammonium persulfate to be mixed with the manganese acetate solution that is 0.56% and the ammonium persulfate solution that massfraction is 0.75% respectively;

[0032] 2) Sodium lauryl sulfate is dispersed in the manganese acetate solution, and magnetically stirred until it is completely dissolved to prepare a mixed solution with a mass fraction of sodium lauryl sulfate of 3.5%;

[0033] 3) Take 60ml of ammonium persulfate solution and add it dropwise into 50ml of the mixed solution with a burette, and stir for 2 hours until the system is uniform;

[0034] 4) Move the homogeneously dissolved system to an ultrasonic cleaning machine with a power of 90W for ultrasonic treatment for 2 hours until a black precipitate is produced;

[0035] 5) The black precipitate obtained in step 4) is alternately washed with water and acetone, filtered, and dried to obtain MnOx, a negative electrode material for a sodium ion battery.

Embodiment 3

[0037] 1) get manganese acetate and ammonium persulfate to be mixed with respectively the manganese acetate solution that mass fraction is 2.01% and the ammonium persulfate solution that mass fraction is 1.22%;

[0038] 2) Sodium lauryl sulfate is dispersed in the manganese acetate solution, and magnetically stirred until it is completely dissolved to prepare a mixed solution with a mass fraction of sodium lauryl sulfate of 5.5%;

[0039] 3) Take 60ml of ammonium persulfate solution and add it dropwise into 80ml of the mixed solution with a burette, and stir for 4 hours until the system is uniform;

[0040] 4) Move the homogeneously dissolved system to an ultrasonic cleaning machine with a power of 60W for ultrasonic treatment for 4 hours until a black precipitate is produced;

[0041] 5) The black precipitate obtained in step 4) is alternately washed with water and acetone, filtered, and dried to obtain MnOx, a negative electrode material for a sodium ion battery.

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Abstract

A preparation method of a sodium ion battery negative electrode material MnOx comprises the steps of respectively preparing a manganese acetate solution and an ammonium persulfate solution from manganese acetate and ammonium persulfate; dispersing lauryl sodium sulfate in the manganese acetate solution to obtain a mixed solution; dropwise adding ammonium persulfate into the mixed solution, and continuously stirring until a system is uniform; moving the uniformly-dissolved system to an ultrasonic generation device for ultrasonic processing until a black precipitant is generated; and washing, filtering and drying the black precipitant, thereby obtaining the sodium ion battery negative electrode material MnOx. According to the preparation method, the acetate solution and the ammonium persulfate are used as raw materials, and the MnOx is prepared with ultrasound. Compared with the prior art, the preparation process is simple, the raw material is simple and available, the flower-shaped morphology comprising the MnOx is prepared with ultrasound, so that the active specific area of the negative electrode material is greatly improved, intercalation and de-intercalation of sodium ions are facilitated, and the capacity is improved.

Description

technical field [0001] The invention belongs to the field of sodium ion batteries, in particular to a negative electrode material MnO for sodium ion batteries x method of preparation. Background technique [0002] Lithium-ion batteries are considered the most advanced power sources for portable electronic devices and electric vehicles. However, the high cost and limited lithium reserves of Li-ion batteries hinder their application for large-scale energy storage, such as renewable energy and smart grids. In this regard, Na is increasingly being developed for Na-ion batteries due to its low cost, plentiful supply (the fourth most abundant element in the Earth's crust), and extensive Na-salt mineral reserves. Na-ion batteries have the following advantages over lithium-ion batteries: (1) Raw material resources are abundant, low in cost, and widely distributed; (2) The potential of sodium-ion batteries is 0.3-0.4V higher than that of lithium-ion batteries, which can utilize the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/50H01M10/054C01G45/02
CPCC01G45/02C01P2002/72C01P2004/03H01M4/502H01M10/054Y02E60/10
Inventor 曹丽云王瑞谊康倩许占位黄剑锋李嘉胤李康
Owner SHAANXI UNIV OF SCI & TECH
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