Electrolyte for rechargeable magnesium battery

An electrolyte and magnesium battery technology, applied in secondary batteries, secondary battery repair/maintenance, circuits, etc., can solve problems such as the need to improve the performance of electrolytes

Inactive Publication Date: 2019-05-03
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the performance of these two electrolytes on non-inert metals needs to be improved

Method used

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  • Electrolyte for rechargeable magnesium battery
  • Electrolyte for rechargeable magnesium battery
  • Electrolyte for rechargeable magnesium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh magnesium trifluoromethanesulfonate and aluminum trichloride in a glove box filled with argon atmosphere, the molar ratio of magnesium trifluoromethanesulfonate to aluminum trichloride is 1:2, add tetrahydrofuran solution drop by drop , the concentration of magnesium trifluoromethanesulfonate is 0.125mol L -1 , placed in a magnetic stirrer and fully stirred to ensure that the solid was fully dissolved in tetrahydrofuran to obtain 0.125mol L -1 Magnesium trifluoromethanesulfonate + aluminum trichloride (1:2 molar ratio) / tetrahydrofuran electrolyte.

[0031] Using stainless steel as the positive electrode, add 0.3mL of 0.125mol L -1 Magnesium trifluoromethanesulfonate+aluminum trichloride (molar ratio is 1:2) / tetrahydrofuran electrolyte, metal magnesium as the negative electrode, polyethylene film as the diaphragm, assembled into a button cell, and carried out the magnesium deposition-dissolution performance test, The charge and discharge current is 0.088mA·cm ...

Embodiment 2

[0033] Weigh magnesium trifluoromethanesulfonate, aluminum trichloride and anthracene in a glove box filled with argon atmosphere, the molar ratio of magnesium trifluoromethanesulfonate to aluminum trichloride is 1:2, drop by drop Tetrahydrofuran solution, the concentration of magnesium trifluoromethanesulfonate is 0.125mol L -1 , the concentration of anthracene is 0.025mol L -1, placed in a magnetic stirrer and fully stirred to ensure that the solid was fully dissolved in tetrahydrofuran to obtain 0.125mol L -1 Magnesium trifluoromethanesulfonate + aluminum trichloride (molar ratio is 1:2) + 0.025mol L -1 Anthracene / THF electrolyte.

[0034] Using stainless steel as the positive electrode, add 0.3mL of 0.125mol L -1 Magnesium trifluoromethanesulfonate + aluminum trichloride (molar ratio is 1:2) + 0.025mol L -1 Anthracene / tetrahydrofuran electrolyte, metal magnesium as the negative electrode, polyethylene film as the diaphragm, assembled into a button battery, and carried ...

Embodiment 3

[0036] Weigh magnesium trifluoromethanesulfonate, aluminum trichloride and magnesium chloride in a glove box filled with argon atmosphere, the molar ratio of magnesium trifluoromethanesulfonate to aluminum trichloride is 1:2, drop by drop Tetrahydrofuran solution, the concentration of magnesium trifluoromethanesulfonate is 0.125mol L -1 , the concentration of magnesium chloride is 0.25mol L -1 , placed in a magnetic stirrer and fully stirred to ensure that the solid was fully dissolved in tetrahydrofuran to obtain 0.125mol L -1 Magnesium trifluoromethanesulfonate + aluminum trichloride (molar ratio is 1:2) + 0.25mol L -1 Magnesium chloride / tetrahydrofuran electrolyte.

[0037] Using stainless steel as the positive electrode, add 0.125mol L -1 Magnesium trifluoromethanesulfonate + aluminum trichloride (molar ratio is 1:2) + 0.25mol L -1 Magnesium chloride / tetrahydrofuran electrolyte, metal magnesium as the negative electrode, polyethylene film as the diaphragm, assembled in...

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Abstract

The invention discloses an electrolyte for a rechargeable magnesium battery using ether as a solvent and relates to the field of rechargeable magnesium batteries. The electrolyte comprises magnesium trifluoromethanesulfonate and aluminum trichloride in a molar ratio of 1: (1 to 5). The concentration of magnesium ions in the electrolyte is 0.1 to 2.0 mol.L-1. The electrolyte has a high anodic oxidation decomposition potential, high electrical conductivity, high reversible magnesium deposition-dissolution efficiency, excellent cycle performance and low electrolyte solution cost, and the anodic oxidation decomposition potential on stainless steel can reach over 2.0V vs.Mg/Mg2+. The stable magnesium deposition-dissolution efficiency of the system is higher than 90%, which promotes the development of a low-cost and high-performance rechargeable magnesium battery.

Description

technical field [0001] The invention relates to the field of rechargeable magnesium batteries, in particular to an electrolyte solution for rechargeable magnesium batteries. Background technique [0002] Magnesium is in the diagonal position with lithium in the periodic table of elements, with similar ionic radii and similar chemical properties. Due to Mg 2+ The characteristics of divalent ions, magnesium has a very high mass energy density (2205mAh g -1 ) and volumetric energy density (3833mAh·cm -3 ); Magnesium has a very rich content (1.5wt%) in the earth's crust, ranking eighth, about 104 times that of lithium, and the price is cheap; the magnesium negative electrode does not have dendrites during the electrodeposition process, and is safe and reliable. The rechargeable magnesium battery with negative electrode has become a research hotspot of a new battery system. [0003] The feasibility of rechargeable magnesium batteries was first proposed by Gregory et al. in 19...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0568H01M10/054H01M10/42
CPCY02E60/10
Inventor 努丽燕娜杨元婴王卫秦杨军王久林
Owner SHANGHAI JIAO TONG UNIV
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