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Self-supporting sodium/potassium ion battery material, preparation method thereof and application of material

A battery material and self-supporting technology, applied in battery electrodes, secondary batteries, nanotechnology for materials and surface science, etc., can solve the problems that cannot meet the requirements of sodium/potassium ion batteries, lack of application of potassium ion batteries, etc., Achieve the effects of excellent cycle performance and rate performance, mild conditions, and increase the overall specific capacity

Inactive Publication Date: 2018-05-15
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there is no corresponding report on the use of sulfur-doped porous graphene aerogels for self-supporting anodes in sodium-ion batteries, and the related applications in potassium-ion batteries are even more lacking.
Compared with other secondary batteries (such as lithium and aluminum ion batteries), sodium / potassium ions have a larger radius, so the sulfur-doped carbon materials used are required to have larger interlayer spacing and pore structure, while the above existing Technology not yet up to par with sodium / potassium-ion batteries

Method used

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  • Self-supporting sodium/potassium ion battery material, preparation method thereof and application of material
  • Self-supporting sodium/potassium ion battery material, preparation method thereof and application of material
  • Self-supporting sodium/potassium ion battery material, preparation method thereof and application of material

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Experimental program
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Effect test

Embodiment 1

[0038] (1) Preparation of graphene oxide

[0039] (a) 3g graphite powder and 3g sodium nitrate are added the 98wt% vitriol oil of 120g in 0 ℃;

[0040] (b) After stirring the solution obtained in step (a) for 30 minutes to be uniform, slowly add 9 g of potassium permanganate.

[0041](c) After reacting the solution obtained in step (b) for 2 hours at 35°C, slowly dilute to 5 times the volume of the original solution at 0°C, add 10mL of hydrogen peroxide, wash it with dilute hydrochloric acid for several times, and then use deionized water After cleaning, the obtained yellow-brown solution is the graphene oxide aqueous solution.

[0042] (2) Preparation of graphene oxide airgel

[0043] Add 10mL of concentrated ammonia water to 500mL of 2mg / mL graphene oxide aqueous solution, stir for 24 hours, freeze it in a refrigerator, and then freeze-dry it at -50°C to obtain graphene oxide airgel .

[0044] (3) Preparation of porous sulfur-doped graphene airgel materials

[0045] Mix...

Embodiment 2

[0047] (1) Preparation of graphene oxide

[0048] (a) 3g graphite powder and 3g sodium nitrate are added the 98wt% vitriol oil of 120g in 0 ℃;

[0049] (b) After stirring the solution obtained in step (a) for 30 minutes to be uniform, slowly add 9 g of potassium permanganate.

[0050] (c) After reacting the solution obtained in step (b) for 2 hours at 35°C, slowly dilute to 5 times the volume of the original solution at 0°C, add 10mL of hydrogen peroxide, wash it with dilute hydrochloric acid for several times, and then use deionized water After cleaning, the obtained yellow-brown solution is the graphene oxide aqueous solution.

[0051] (2) Preparation of graphene oxide airgel

[0052] Add 10mL of concentrated ammonia water to 500mL of 10mg / mL graphene oxide aqueous solution, stir for 24 hours, freeze it in a refrigerator, and then freeze-dry it at -50°C to obtain graphene oxide airgel .

[0053] (3) Preparation of porous sulfur-doped graphene airgel materials

[0054] M...

Embodiment 3

[0056] (1) Preparation of graphene oxide

[0057] (a) 3g graphite powder and 3g sodium nitrate are added the 98wt% vitriol oil of 120g in 0 ℃;

[0058] (b) After stirring the solution obtained in step (a) for 30 minutes to be uniform, slowly add 9 g of potassium permanganate.

[0059] (c) After reacting the solution obtained in step (b) for 2 hours at 35°C, slowly dilute to 5 times the volume of the original solution at 0°C, add 10mL of hydrogen peroxide, wash it with dilute hydrochloric acid for several times, and then use deionized water After cleaning, the obtained yellow-brown solution is the graphene oxide aqueous solution.

[0060] (2) Preparation of graphene oxide airgel

[0061] Add 1 mL of concentrated ammonia water to 500 mL of 5 mg / mL graphene oxide aqueous solution, stir for 1 hour, freeze it in a refrigerator, and then freeze-dry it at -50°C to obtain graphene oxide airgel .

[0062] (3) Preparation of porous sulfur-doped graphene airgel materials

[0063] Mi...

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Abstract

The invention discloses a self-supporting sodium / potassium ion battery material, a preparation method thereof and an application of the material. The self-supporting sodium / potassium ion battery material is particularly porous sulfur doped graphene aerogel, the content of sulfur is 2-10wt%, and the structure of the material is a three-dimensional structure formed by self-assembling flake graphene.Oxidized graphene water solution firstly reacts with ammonia water and then freeze-dried to obtain graphene aerogel, and the graphene aerogel reacts with sulfur steam at high temperature to obtain the porous sulfur doped graphene aerogel. The porous sulfur doped graphene aerogel is compacted and then used for a sodium / potassium ion battery negative electrode in a self-supporting mode. A sodium / potassium ion battery taking the porous sulfur doped graphene aerogel as the negative electrode has the advantages of ultrahigh specific capacity, excellent cycling performance, good rate and the like.Compared with other non-self-supporting negative electrode materials, the self-supporting material can decrease consumption of current collectors and adhesives and can more easily improve sodium / potassium ion battery performances.

Description

technical field [0001] The invention relates to the technical field related to sodium / potassium ion batteries, in particular to a self-supporting sodium / potassium ion battery material and its preparation method and application. Background technique [0002] In order to meet the increasing energy demand and intermittency of energy supply in modern society, a large number of renewable energy sources such as wind energy, solar energy, biomass, tidal energy and geothermal energy have been developed. But because of its intermittent nature, efficient energy storage technology is needed to store it. Lithium-ion batteries have become the most suitable energy storage technology among many solutions due to their advantages such as high energy density and long cycle life. However, the large-scale application of lithium-ion batteries also faces price constraints and resource constraints. For this reason, sodium-ion batteries and potassium-ion batteries with more price advantages have ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/583H01M10/054B82Y30/00
CPCB82Y30/00H01M4/364H01M4/583H01M10/054H01M2004/021H01M2004/027Y02E60/10
Inventor 黎晋良麦文杰王子龙谢俊鹏林锐
Owner JINAN UNIVERSITY
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