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A kind of composite corrosion inhibitor electrolyte and its application, magnesium-air battery
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A composite corrosion inhibitor and air battery technology, which can be used in electrical components, secondary batteries, acid electrolytes, etc., and can solve problems such as poor slow-release effect
Active Publication Date: 2020-11-10
易航时代(北京)科技有限公司
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However, the composite corrosion inhibitors in the prior art still have the problem of poor slow-release effect
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[0021] In the present invention, there is no special limitation on the preparation method of the composite corrosion inhibitor electrolyte, which can be prepared by a preparation method well known to those skilled in the art.
[0022] The present invention also provides the application of the composite corrosion inhibitor electrolyte described in the above technical solution in a magnesium-air battery.
[0023] The present invention also provides a magnesium-air battery, comprising a negative electrode, an air positive electrode and the composite corrosion inhibitor electrolyte described in the above technical solution, and the negative electrode is a magnesium alloy anode material.
[0024] In the present invention, the magnesium alloy anode material in the magnesium-air battery is preferably cylindrical, and the thickness of the cylindrical shape is preferably 8mm. In the present invention, the cylinder is preferably polished with 200#, 400# and 800# sandpaper in sequence. ...
Embodiment 1
[0044] (1) Before smelting the alloy, use sandpaper and clean water to clean the oil stains and rust on the surface of the metal raw materials and dry them.
[0045] (2) In the process of smelting metal, first put high-purity magnesium and high-purity aluminum into an alumina crucible, and add magnesium alloy covering agent, the quality of magnesium alloy covering agent is 5% of the weight of high-purity magnesium and high-purity aluminum, magnesium alloy covering The chemical composition of the agent is 45% magnesium chloride, 30% potassium chloride, 10% sodium chloride, 1% calcium chloride, 1% calcium fluoride, 3% magnesium oxide and 10% carbonate foaming agent (CaCO 3 ). Place the crucible in a resistance furnace, heat it to 720°C, and keep it warm for about 25 minutes until it is completely melted.
[0046] (3) Add other alloying elements (indium and erbium) into the crucible, stir evenly with a graphite rod, put it in a furnace at 720°C for 8 minutes, and make it fully d...
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Abstract
The invention provides a composite corrosion inhibitor electrolyte, an application thereof and a magnesium air battery, and belongs to the field of air batteries. In the invention, La<3+> in lanthanumnitrate can react with OH<-> in the solution to generate lanthanum hydroxide to precipitate, and the structure and appearance of a passive film are changed, so that hydrogen evolution is inhibited, the damage effect of nitrate ions on the passive film is weak, and the integrity of the primary passive film is ensured, thereby having a good protection effect on internal battery materials, and inhibiting the hydrogen evolution. CTAB is a cationic surfactant, can significantly reduce the surface tension, change the surface state of metal / electrolyte, gather on the surface of active metal by utilizing the electrostatic adsorption of NH<2+>, reduce the surface energy of the metal and increase the corrosion activation energy, thereby slowing down the corrosion rate, and simultaneously forming alayer of hydrophobic protection film on the surface layer of the metal, thus hindering the charge and ion transfer, hindering the reaction process and reducing the corrosion rate.
Description
technical field [0001] The invention relates to the technical field of air batteries, in particular to a composite corrosion inhibitor electrolyte and its application, and a magnesium-air battery. Background technique [0002] With the global energy crisis and environmental pollution becoming increasingly serious, countries all over the world are stepping up the development of new energy sources. Magnesium-air battery, as a kind of high specific energy green battery, has received extensive attention. [0003] Aiming at the problems of severe self-corrosion and large polarization of the anode. It is not enough to study the alloying of magnesium alloy anode materials. Adding corrosion inhibitors to the electrolyte is a convenient and efficient method. The amount of corrosion inhibitor added is generally very small, and will not cause major changes to the electrolyte system, which is very helpful for further improving the performance of the anode of the magnesium-air battery....
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