Electrolytic solution of rechargeable magnesium cell and application method thereof

An electrolyte and magnesium battery technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of complex preparation process, and achieve the effects of simple preparation, high magnesium deposition-dissolution efficiency, and cheap raw materials

Inactive Publication Date: 2014-05-14
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aurbach et al. (Aurbach D, Lu Z, Schechter A, et al. Prototype system for rechargeable magnesium batteries [J]. Nature, 2000, 407: 724) of Israel made a major breakthrough in the research of rechargeable magnesium batteries, which proposed The rechargeable magnesium battery is: Mg︱0.25mol L -1 Mg(AlCl 2 BuEt) 2 / tetrahydrofuran (Et is ethyl, Bu is butyl)︱Mg x Mo 3 S 4 , where the electrolyte is 0.25mol L -1 Mg(AlCl 2 EtB 2 ) / tetrahydrofuran, its anodic oxidation decomposition potential is 2.5V vs. Mg, the magnesium deposition / dissolution efficiency is close to 100%, but the preparation process is complicated

Method used

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  • Electrolytic solution of rechargeable magnesium cell and application method thereof
  • Electrolytic solution of rechargeable magnesium cell and application method thereof
  • Electrolytic solution of rechargeable magnesium cell and application method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Using N-methylaniline and ethylmagnesium chloride as solutes and tetrahydrofuran as solvent, the configuration is 2mol·L -1 N-methylaniline-ethylmagnesium chloride / tetrahydrofuran electrolyte, wherein the molar ratio of N-methylaniline to ethylmagnesium chloride is 1:1.

[0034] In the three-electrode tube, platinum is used as the working electrode, and 3mL of 2mol·L is added -1 N-methylaniline-ethylmagnesium chloride / tetrahydrofuran electrolyte, metal magnesium as counter electrode and reference electrode, assembled into a three-electrode system, cyclic voltammetry test in an argon glove box, scanning speed 50mV·s -1 . Cyclic voltammetry results such as figure 1 As shown, the magnesium deposition-dissolution performance is good, and the anodic oxidation decomposition potential of the electrolyte is 1.65V vs. Mg.

Embodiment 2

[0036] Using N-methylaniline and phenyl magnesium chloride as solutes, and tetrahydrofuran as solvent, the configuration is 2mol·L -1 N-methylaniline-phenylmagnesium chloride / tetrahydrofuran electrolyte, wherein the molar ratio of N-methylaniline to phenylmagnesium chloride is 1:1.

[0037] In the three-electrode tube, platinum is used as the working electrode, and 3mL of 2mol·L is added -1 N-methylaniline-phenylmagnesium chloride / tetrahydrofuran electrolyte, metal magnesium as counter electrode and reference electrode, assembled into a three-electrode system, cyclic voltammetry test in an argon glove box, scanning speed 50mV·s -1 . Cyclic voltammetry results such as figure 2 As shown, the magnesium deposition-dissolution performance is good, and the anodic oxidation decomposition of the electrolyte is 1.65V vs.Mg.

Embodiment 3

[0039] Using N-methylaniline, ethylmagnesium chloride and aluminum trichloride as solutes and tetrahydrofuran as solvent, the configuration is 0.5mol·L -1 N-methylaniline-ethylmagnesium chloride-aluminum trichloride / tetrahydrofuran electrolyte, in which the molar ratio of N-methylaniline to ethylmagnesium chloride is 1:1, and the molar ratio of aluminum trichloride to N-methylaniline It is 1:1.

[0040] In the three-electrode tube, platinum is used as the working electrode, and 3mL of 0.5mol·L is added -1 N-methylaniline-ethylmagnesium chloride-aluminum trichloride / tetrahydrofuran electrolyte, metal magnesium as counter electrode and reference electrode, assembled into a three-electrode system, cyclic voltammetry test in an argon glove box, scanning speed of 50mV ·S -1 . Cyclic voltammetry results such as image 3 As shown, the magnesium deposition-dissolution performance is good, and the anodic oxidation decomposition of the electrolyte is 1.8V vs. Mg.

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Abstract

The invention discloses an electrolytic solution of a rechargeable magnesium cell and an application method thereof. The electrolytic solution comprises the following constituents: a solute is a phenyl amines compound and alkyl magnesium halide or a phenyl amines compound and alkyl magnesium and also can contain aluminium trichloride, and a solvent is ether; the concentration of the electrolytic solution is 0.1-3 mol / L. The electrolytic solution provided by the invention is applied to the rechargeable magnesium cell, a positive electrode oxidative decomposition potential can achieve more than 2.3V vs.Mg, and the efficiency of a stable circulation process can keep more than 90%; the electrolytic solution provided by the invention has the advantages that the preparation is simple, the raw material is cheap, the magnesium sedimentation-digestion efficiency is high, and the positive electrode oxidative decomposition potential is high.

Description

Technical field [0001] The invention relates to an electrolyte and an application method, in particular to an electrolyte containing an aniline compound and an application method thereof in a rechargeable magnesium battery, belonging to the technical field of rechargeable magnesium batteries. Background technique [0002] Magnesium has many similarities in ionic radius and chemical properties with lithium, and it has the advantages of low price, high safety and environmental friendliness; the theoretical specific capacity of magnesium is larger, and the rechargeable magnesium battery with magnesium as the negative electrode can provide more than lead Acid batteries and nickel-cadmium batteries have much higher energy density. Although rechargeable magnesium batteries are difficult to compete with lithium batteries in the application of small electrical equipment, they have potential advantages in heavy load applications and are considered to be very promising A green storage batt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0566
CPCH01M10/0566Y02E60/10
Inventor 努丽燕娜栾健秦奋杨军王久林
Owner SHANGHAI JIAO TONG UNIV
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