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Sodium-carbon dioxide battery, anode for sodium-based battery and preparation method of sodium-carbon dioxide battery

An anode and battery technology, applied in the field of new energy materials, can solve problems such as large contact interface resistance, internal short circuit, safety issues, etc., and achieve the effects of stable electrochemical performance, large specific surface area, and increased conductivity

Inactive Publication Date: 2020-10-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These problems can eventually lead to internal short circuits, which create serious safety problems
[0003] To solve these problems, one solution is to replace the organic liquid electrolyte with a highly conductive, non-flammable solid ceramic electrolyte, however, there is a huge contact interface resistance at the interface between the solid metal Na and the solid electrolyte, resulting in the metal-carbon dioxide battery always no major breakthrough
In addition, the electrochemical performance of metal carbon dioxide batteries is still unstable.

Method used

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  • Sodium-carbon dioxide battery, anode for sodium-based battery and preparation method of sodium-carbon dioxide battery
  • Sodium-carbon dioxide battery, anode for sodium-based battery and preparation method of sodium-carbon dioxide battery
  • Sodium-carbon dioxide battery, anode for sodium-based battery and preparation method of sodium-carbon dioxide battery

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preparation example Construction

[0029] This specific embodiment also includes the above-mentioned preparation method for the anode on the sodium-based battery, comprising the following steps:

[0030] S1. Dissolving the supporting electrolyte in an ether solvent to prepare an electrolyte solution with a concentration of 0.1 to 1 mol / L; the supporting electrolyte includes sodium perchlorate, sodium trifluoromethanesulfonate, sodium bistrifluoromethanesulfonylimide, One or more of sodium hexafluorophosphate;

[0031] S2, dissolving biphenyl and metal sodium in the electrolyte solution in step S1 to obtain an alkali solution with a sodium concentration of 0.1-1mol / L;

[0032] S3. Add conductive carbon to the alkali solution prepared in step S2 according to 0.1-5% of the mass fraction of the alkali solution and stir for 2-3 hours to obtain the anode.

[0033] combine figure 1 , this specific embodiment also includes a sodium carbon dioxide battery, which includes the above-mentioned anode or the above-mentione...

Embodiment 1

[0038] In an inert atmosphere glove box, first use sodium perchlorate as a supporting electrolyte and dissolve it in tetraethylene glycol dimethyl ether, and stir until the supporting electrolyte is completely dissolved to obtain a 0.1mol / L sodium perchlorate electrolyte; : 1 Take biphenyl and sodium metal respectively, first dissolve biphenyl in the above-mentioned sodium perchlorate electrolyte, add sodium metal after dissolving completely to obtain 0.1mol / L dark green alkali solution, add 1wt after all dissolving % conductive carbon black, stirred for 2 hours to obtain a semi-liquid anode.

[0039] Such as figure 1 As shown, from the negative electrode to the positive electrode, the semi-liquid anode, β-Al 2 o 3 A sodium-aluminate fast ion conductor solid electrolyte, a sodium chloride electrolyte, and a carbon dioxide positive electrode are used to assemble a sodium-carbon dioxide battery.

[0040] The sodium carbon dioxide battery assembled in this example is pure CO a...

Embodiment 2

[0042] In an inert atmosphere glove box, at first take sodium perchlorate as supporting electrolyte and be dissolved in ethylene glycol dimethyl ether, stir until supporting electrolyte is all dissolved, obtain the sodium perchlorate electrolyte of 0.1mol / L; Molar ratio 1: 1 Weigh biphenyl and metal sodium respectively, first dissolve biphenyl in the above-mentioned sodium perchlorate electrolyte, and then add metal sodium to obtain a 1mol / L dark green alkali solution after completely dissolving, then add 5wt% of Conductive carbon black, stirred for 2 hours, can obtain double (electronic and ion) conductive medium semi-liquid anode.

[0043] Such as figure 1 As shown, from the negative electrode to the positive electrode, the sodium carbon dioxide battery is assembled sequentially from the bottom to the top according to the semi-liquid anode, the sulfide fast ion conductor solid electrolyte, the sodium chloride electrolyte, and the carbon dioxide positive electrode.

[0044] ...

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Abstract

The invention relates to a sodium-carbon dioxide battery, an anode for a sodium-based battery and a preparation method of the sodium-carbon dioxide battery. The anode comprises metal sodium, biphenyl,a supporting electrolyte, an ether solvent and conductive carbon. A supporting electrolyte is dissolved in an ether solvent to obtain an electrolyte, biphenyl and metal sodium are dissolved in the electrolyte to obtain an alkaline solution, and then the alkaline solution is mixed with conductive carbon to obtain the conductive carbon electrode material. The concentration of the supporting electrolyte in the electrolyte is 0.1-1 mol / L, the concentration of the sodium biphenyl in the alkaline solution is 0.1-1 mol / L. The method comprises the following steps: dissolving a supporting electrolytein an ether solvent to prepare an electrolyte with the concentration of 0.1-1mol / L; dissolving biphenyl and metal sodium in an electrolyte to prepare an alkaline solution with the sodium concentrationof 0.1-1mol / L; and adding the conductive carbon into an alkaline solution to obtain the anode. The invention also comprises a sodium-carbon dioxide battery with the anode. The anode is safe and has stable electrochemical performance.

Description

technical field [0001] The invention relates to the field of new energy materials, in particular to a sodium carbon dioxide battery, an anode used for a sodium-based battery and a preparation method thereof. Background technique [0002] Although a major breakthrough has been made in the research of sodium-carbon dioxide batteries in recent years, a typical sodium-carbon dioxide battery is composed of solid metal sodium as the negative electrode and liquid electrolyte, and metal sodium faces problems such as dendrites and self-corrosion during the stripping and electroplating process. . These problems can eventually lead to internal short circuits, creating serious safety concerns. [0003] To solve these problems, one solution is to replace the organic liquid electrolyte with a highly conductive, non-flammable solid ceramic electrolyte, however, there is a huge contact interface resistance at the interface between the solid metal Na and the solid electrolyte, resulting in ...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88H01M12/08
CPCH01M4/8652H01M4/8673H01M4/88H01M12/08H01M2004/8684H01M2300/0091
Inventor 湛菁徐昌藩马雅琳梁风
Owner CENT SOUTH UNIV
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