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Magnesium water battery

A magnesium-water battery and material-water technology, applied in the field of electrochemistry, can solve problems such as difficulty in meeting the power supply requirements of marine equipment and battery performance degradation, and achieve the effects of increasing battery volume ratio energy, improving stability, and being easy to use

Inactive Publication Date: 2017-06-27
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

When the concentration of dissolved oxygen in seawater decreases, the performance of the battery drops rapidly, making it difficult to meet the normal power supply requirements of marine equipment

Method used

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Embodiment

[0024] AZ61 magnesium alloy is used as the anode, nickel foam is used as the cathode skeleton, and carbon-supported cobalt catalyst is loaded on the foam nickel, and the catalyst loading is 2mg / cm 2 , the electrode area is 84cm 2 , The distance between the anode and the cathode is 3mm, and the separator is a polypropylene film, which is placed between the cathode and the anode. The electrolyte used is an aqueous sodium chloride solution with a mass fraction of 3.5%. Its 2mA / cm 2 When the constant current is discharged, the performance of the battery drops from 0.48V to 0.4V in 275 hours, and the attenuation is only 0.08V. The battery will have great potential after further development.

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Abstract

The invention relates to a magnesium water battery which comprises a magnesium or magnesium alloy anode, a diaphragm, a hydrogen-evolution-catalyst-carried cathode and a cathode reactant water, wherein the anode and cathode are arranged in opposite; the diaphragm is arranged between the anode and cathode; and the anode, cathode and diaphragm are arranged in water. Compared with the prior art, the magnesium water battery is simple in structure and convenient to use, and is not restricted by the dissolved oxygen concentration in seawater when being used in seawater. The underwater magnesium water battery solves the problem of dependence of the traditional magnesium dissolved oxygen seawater battery on the oxygen concentration in seawater, and can operate normally even in an oxygen-free environment as long as the anode and cathode of the battery are isolated by the diaphragm and a hydrogen evacuation channel is left. Compared with the traditional magnesium dissolved oxygen seawater battery which needs a larger open space to ensure the continuous renewal of fresh seawater, the magnesium water battery has the advantages of compact structure, small size and obviously higher volumetric specific energy. The battery can operate normally as long as seawater enters.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a magnesium-water battery using metal magnesium or a magnesium alloy as an anode, a carrier loaded with a hydrogen evolution catalyst as a cathode, and water as a cathode reactant. Background technique [0002] Building a marine power is the goal of our country's ocean development and utilization in this century. In this context, the exploration and development of the deep sea and the open sea has become a research hotspot in the marine field. For this reason, marine equipment that can meet the requirements of the above-mentioned environments has become particularly important, and there is an urgent need to increase the working water depth and prolong the working time of the equipment. Power supply is an important part of determining whether marine equipment can work normally. Due to the limitation of actual marine working conditions, especially in deep sea...

Claims

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Application Information

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IPC IPC(8): H01M6/34
CPCH01M6/34
Inventor 孙公权王二东燕召刘乾锋
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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