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A preparation method of a magnesium sulfur battery electrolyte containing lithium ion additive and an application thereof

A magnesium-sulfur battery and additive technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problem that magnesium-sulfur batteries cannot be charged and discharged at high rates, and achieve good oxidation stability, wide applicability, and low cost.

Active Publication Date: 2019-01-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that magnesium-sulfur batteries cannot be charged and discharged at a high rate, the present invention provides a preparation method and application of a novel magnesium-sulfur battery electrolyte containing lithium ion additives

Method used

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  • A preparation method of a magnesium sulfur battery electrolyte containing lithium ion additive and an application thereof
  • A preparation method of a magnesium sulfur battery electrolyte containing lithium ion additive and an application thereof
  • A preparation method of a magnesium sulfur battery electrolyte containing lithium ion additive and an application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step (1): Add 0.04 g lithium powder into 10 ml 0.5 M / L HMDS system magnesium-sulfur battery electrolyte and stir for 24 hours.

[0025] (2) Let the solution of step (1) stand for 48 hours.

[0026] (3) Take the clear liquid part of step (2), which is the HMDS system magnesium-sulfur battery electrolyte containing lithium ion additives.

[0027] Depend on figure 1 From the cyclic voltammetry curve shown, it can be seen that the electrolytic solution has good reversibility to the deposition and stripping of magnesium and has no other impurity redox peaks.

[0028] Depend on figure 2 The shown LSV curve shows that the electrochemical stability window of the electrolyte is higher than 3.5 V.

[0029] Depend on image 3 The rate performance curve of the Mg / S full battery shown shows that as the charge-discharge rate increases, the battery discharge capacity decays less, and the discharge specific capacity of 1000 mAh / g can still be maintained at 5 C.

[0030] Depend on...

Embodiment 2

[0033] Step (1): Add 0.035 g of lithium powder into 10 ml of 0.4 M / L MACC system magnesium-sulfur battery electrolyte and stir for 24 hours.

[0034] Step (2): Let the solution of step (1) stand for 48 hours.

[0035] Step (3): Take the clear liquid part of step (2), which is the electrolyte solution for magnesium-sulfur batteries of the MACC system containing lithium ion additives.

Embodiment 3

[0037] Step (1): Add 0.1 g lithium powder to 10 ml 1 M / L Mg(TFSI) 2 System magnesium-sulfur battery electrolyte and stirred for 24 hours.

[0038] Step (2): Let the solution of step (1) stand for 48 hours.

[0039] Step (3) Take the supernatant part of step (2), which is Mg(TFSI) containing lithium ion additives 2 System magnesium sulfur battery electrolyte.

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Abstract

The invention discloses a preparation method of a magnesium sulfur battery electrolyte containing lithium ion additive and an application thereof. The preparation method of the magnesium sulfur battery electrolyte containing lithium ion additive adds excess metal lithium into the magnesium sulfur battery electrolyte without additive to generate a magnesium sulfur battery electrolyte containing lithium ion additive. The magnesium sulfide battery electrolyte containing lithium ion additive prepared by the method can be used in magnesium sulfide battery and magnesium ion battery. A magnesium sulfur battery electrolyte contain lithium ion additive in that invention is prepared by a method of metal lithium self-generation in the electrolyte, the cost is low, the method is simple, and large-scale production is easy to realize. The electrolyte of the magnesium sulfur battery containing lithium ion additive prepared by the invention does not introduce impurity anions, avoids the electrochemical regulator produced by the electrolyte due to the introduction of the additive, has good oxidation stability, and can realize the high rate charge and discharge of the magnesium sulfur battery.

Description

technical field [0001] The invention belongs to the technical field of chemical power sources, and relates to a method for preparing an electrolyte additive and its application, in particular to a method for preparing an electrolyte additive containing lithium ions and its application in magnesium-sulfur batteries and magnesium-ion batteries. Background technique [0002] With the multi-functionalization of electronic devices such as mobile phones and the rapid development of new energy vehicles, the requirements for specific energy, safety and cost of batteries for electronic products and electric vehicles are gradually increasing. In recent years, due to the low cost and high volumetric capacity (3832 mA h cm −3 ), excellent safety and abundant reserves in nature have received great attention. Sulfur cathode is considered as a promising cathode material due to its high theoretical specific capacity (1675 mAh / g) and abundant natural reserves. The magnesium-sulfur secondar...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/054
CPCH01M10/054H01M10/0567Y02E60/10
Inventor 左朋建李亚琦尹鸽平李睿楠马玉林杜春雨高云智
Owner HARBIN INST OF TECH
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