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Magnesium battery

A magnesium battery and magnesium alloy technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of large positive shift of working potential, difficult to meet industrial needs, low anode utilization rate, etc., to reduce the difference in electrochemical activity, The effect of reducing the self-corrosion rate and improving the utilization rate

Inactive Publication Date: 2016-04-13
黄静 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when magnesium alloy is used as the negative electrode material of the battery, due to the high self-corrosion rate, low utilization rate of the anode, especially the serious polarization of the anode, the positive shift of the working potential is large, and it is difficult to meet the industrial needs.
On the other hand, the magnesium alloy is covered with a passivation film in the electrolyte, which will passivate the magnesium electrode, resulting in a longer time after the voltage of the magnesium battery in use.

Method used

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Examples

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Effect test

Embodiment 1

[0017] Magnesium electrode: based on the total weight of the magnesium alloy, the magnesium alloy contains Er0.01%, Sn0.05%, Y0.01%, Ce0.01%, Nd0.1% and In0.02%, and the balance is Mg.

[0018] The electrolyte is 1mol / L Mg(ClO 4 ) 2 solution, add 0.1% Li 2 CrO 4 .

Embodiment 2

[0020] Magnesium electrode: based on the total weight of the magnesium alloy, the magnesium alloy contains Er0.3%, Sn0.5%, Y0.03%, Ce0.1%, Nd0.5% and In0.2%, and the balance is Mg.

[0021] The electrolyte is 1mol / L MgBr 2 solution, add 0.1% Na 2 CrO 4 .

Embodiment 3

[0023] Magnesium electrode: based on the total weight of the magnesium alloy, the magnesium alloy contains Er0.01%, Sn0.05%, Y0.01%, Ce0.01%, Nd0.1%, In0.02%, Al1%, Zn 0.5%, and the balance is Mg.

[0024] The electrolyte is 1mol / L Mg(ClO 4 ) 2 solution, add 0.1% Li 2 CrO 4 .

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Abstract

The invention discloses a magnesium battery. With a magnesium alloy as a negative material, on the basis of the total weight of the magnesium alloy, the magnesium alloy contains the following components in percentage: 0.01%-0.3% of Er, 0.05%-0.5% of Sn, 0.01%-0.03% of Y, 0.01%-0.1% of Ce, 0.1%-0.5% of Nd and 0.02%-0.2% of In. Alloy elements of destroying the structure of a magnesium oxide film are added to a magnesium electrode, so that falling of a corrosion product can be effectively promoted; the self-corrosion speed is lowered; and the utilization rate of a magnesium negative electrode is greatly improved.

Description

technical field [0001] The invention relates to a battery, in particular to a magnesium battery. Background technique [0002] The chemical activity of magnesium is high, the electronegativity is 1.31, the standard electrode potential is -2.36v, and the battery using magnesium as the negative electrode material has a theoretical specific capacity of 2.22Ah / g, which is only smaller than lithium and aluminum among common metals. far greater than that of zinc. At the same time, magnesium reserves are very rich in the earth's crust, so magnesium and its alloys are cheap, and magnesium and most of its compounds are non-toxic and environmentally friendly. It can be seen that magnesium and its alloys have great application potential in the field of batteries as anodes (negative electrodes). However, when magnesium alloy is used as the negative electrode material of the battery, due to the reasons such as high self-corrosion rate, low anode utilization rate, especially severe anod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/46
CPCH01M4/466Y02E60/10
Inventor 黄静方耀增李铮
Owner 黄静
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