Method for preparing sodium electrode based on sodium salt boiling method

A technology of electrode and sodium salt, which is applied in the direction of negative electrode, battery electrode, active material electrode, etc., can solve the problems of environmental pollution, unfavorable mass production, etc., and achieve the effect of simple process, excellent sodium storage performance, and increasing the distance between graphite layers

Pending Publication Date: 2022-03-08
HANGZHOU DIANZI UNIV
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Problems solved by technology

Although this method can increase the layer spacing of graphite, it uses strong acid, which will pollute the environment and is extremely unfavorable for large-scale production.

Method used

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  • Method for preparing sodium electrode based on sodium salt boiling method
  • Method for preparing sodium electrode based on sodium salt boiling method
  • Method for preparing sodium electrode based on sodium salt boiling method

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Embodiment Construction

[0028] In order to better illustrate the process and solutions of the present invention, the following inventions will be further described in conjunction with the accompanying drawings and embodiments. The specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] see figure 1 , shown as the flow chart of a method for preparing a sodium electrode based on the sodium salt boiling method proposed by the present invention, comprising the following steps:

[0030] S1, configure 200 ml of sodium chloride solution with a mass fraction of 5% to 25% or a sodium sulfate solution with a mass fraction of 5% to 20%, add 5 grams of graphite powder to the sodium chloride solution or sodium sulfate solution and stir evenly;

[0031] S2, heating the mixed material obtained in S1 at 100° C. for 2 hours to evaporate the water to crystallize sodium chloride or sodium sulfate;

[0032] S3, ball milling the mixture of graphit...

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Abstract

The invention discloses a method for preparing a sodium electrode based on a sodium salt boiling method. The method comprises the following steps: S1, adding graphite powder into a sodium chloride solution or a sodium sulfate solution, and uniformly stirring; s2, heating the mixed material obtained in the step S1 to evaporate water so as to crystallize sodium chloride or sodium sulfate; s3, performing ball milling on the mixture of the graphite powder and the sodium chloride or the mixture of the graphite powder and the sodium sulfate obtained in the step S2; s4, the materials obtained after ball milling in the S3 are put into a high-temperature furnace; s5, sequentially washing and centrifuging the material obtained in the step S4 for three times, and then drying at 100 DEG C for 10 hours to obtain a graphite material with increased interlayer spacing; and S6, mixing the material obtained in the step S5 with a single-walled carbon nanotube and sodium alginate, and coating a copper foil with the mixed material to manufacture a sodium storage electrode. By adopting the technical scheme of the invention, the interlayer spacing of the graphite material can be simply and effectively increased, so that the sodium storage performance of the graphite material is improved.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for preparing a sodium electrode based on a sodium salt boiling method. Background technique [0002] Lithium-ion batteries have been used in many areas of our lives due to their high energy density. The scarcity of lithium resources has forced us to develop other alkali metal batteries. Sodium-ion batteries are favored because of the abundant sodium resources in the earth's crust. [0003] However, graphite, which is used as an anode material for lithium-ion batteries, is not suitable for sodium-ion batteries due to the larger radius of sodium ions than lithium ions. Researchers treated graphite with strong acid to increase the interlayer spacing of graphite to obtain graphite with increased interlayer spacing and apply it to sodium-ion batteries. Although this method can increase the layer spacing of graphite, it uses a strong acid, which wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1393H01M4/587H01M4/62H01M10/054
CPCH01M4/1393H01M4/587H01M4/62H01M10/054H01M2004/027H01M2004/021Y02E60/10
Inventor 李仕琦冷丹朱铧丞倪瑞黄澳旗
Owner HANGZHOU DIANZI UNIV
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