CN108054403A - The application of sodium alginate, magnesium-air cell electrolyte corrosion inhibitor, electrolyte and preparation method thereof, magnesium-air cell - Google Patents
The application of sodium alginate, magnesium-air cell electrolyte corrosion inhibitor, electrolyte and preparation method thereof, magnesium-air cell Download PDFInfo
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- CN108054403A CN108054403A CN201711269431.8A CN201711269431A CN108054403A CN 108054403 A CN108054403 A CN 108054403A CN 201711269431 A CN201711269431 A CN 201711269431A CN 108054403 A CN108054403 A CN 108054403A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/04—Cells with aqueous electrolyte
- H01M6/045—Cells with aqueous electrolyte characterised by aqueous electrolyte
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M12/00—Hybrid cells; Manufacture thereof
- H01M12/04—Hybrid cells; Manufacture thereof composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type
- H01M12/06—Hybrid cells; Manufacture thereof composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type with one metallic and one gaseous electrode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/08—Fuel cells with aqueous electrolytes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
Application, magnesium air cell electrolyte corrosion inhibitor, electrolyte the present invention relates to sodium alginate and preparation method thereof, magnesium air cell, belong to magnesium air cell technical field.Present invention firstly provides application of the sodium alginate in terms of magnesium air cell electrolyte corrosion inhibitor.The magnesium air cell electrolyte corrosion inhibitor of the present invention, including sodium alginate, sodium metasilicate, the sodium alginate, the molar ratio of sodium metasilicate are 0.004~0.4：0.001~0.2.The magnesium air cell electrolyte corrosion inhibitor of the present invention, component forms simple, it is at low cost, safety and meet environmental requirement, the liberation of hydrogen self-corrosion rate of magnesium anode can not only be significantly reduced, can also make magnesium anode open circuit potential and impressed current under the conditions of operating potential it is significantly negative move, anode efficiency rise makes Magnesium anode alloy possess good corrosion resistance and higher electro-chemical activity.
Description
Technical field
Application, magnesium-air cell electrolyte corrosion inhibitor, electrolyte and its preparation side the present invention relates to sodium alginate
Method, magnesium-air cell belong to magnesium-air cell technical field.
Background technology
Due to metal-air battery have many advantages, such as efficiently, cleaning, by as the ideal power power supply of 21 century it
One.China has increased the Innovation Input to metal-air battery, especially magnesium-air cell and zinc-air battery etc..
Magnesium-air cell is using air electrode as anode, and magnesium metal or magnesium alloy are as cathode, and neutral aqueous solution is as electrolyte, air
In O2Gas-solid-liquid three phase boundary and metal Mg are reached by gas-diffusion electrode and react to release electric energy, product without
Poison and recoverable, are preferable battery systems.The battery system is enriched with material source, and energy density is big, reliability
Height, the safe and pollution-free, advantages such as price is low, has very wide application prospect.
From the seventies in last century, numerous studies have been made to magnesium-air cell both at home and abroad, all in all, research master
Concentrate on magnesium anode material, electrolyte corrosion inhibitor and battery system etc..Since pure magnesium is a kind of active gold of comparison
Belong to material, self-corrosion rate is larger in neutral solution, and generates a large amount of hydrogen, prevents battery from giving full play to high-energy power supply
Advantage, especially under high current density operating condition, steady operation current potential is relatively low, and anode polarization is serious, limit magnesium-
The industrial industrialization and practical application of air cell.In recent years the study found that developing new magnesium anode by microalloying
Material and the corresponding electrolyte corrosion inhibitor of addition are greatly improved the chemical property of magnesium anode and its answering in the battery
Use performance.
Although most of single type electrolyte corrosion inhibitors can reduce the self-corrosion rate of Magnesium anode alloy, often with
Sacrificial anode activity is cost；It can meet simultaneously and reduce Magnesium anode alloy self-corrosion rate, and not influence even improve
The corrosion inhibiter of magnesium anode activity, usually composite inhibiter, but most of composite inhibiter complicated components, on the one hand can make
Into material, the wasting of resources, some components of another aspect are likely to result in environmental pollution, do not meet environmental requirement.Therefore one is sought
The new single type corrosion inhibiter of class or simple composite type corrosion inhibiter can significantly improve magnesium anode activity but also significantly reduce from rotten
Rate is lost, is of great significance.
The content of the invention
It is an object of the invention to provide a kind of sodium alginate answering in terms of magnesium-air cell electrolyte corrosion inhibitor
With.
Second object of the present invention is to provide a kind of magnesium-air cell electrolyte corrosion inhibitor, can not only significantly drop
Low anode self-corrosion rate can also improve anode activity.
Third object of the present invention is to provide a kind of magnesium-air cell electrolyte.
Fourth object of the present invention is the preparation method for providing a kind of magnesium-air cell electrolyte.
The 5th of the present invention is designed to provide a kind of magnesium-air cell.
To achieve the above object, the technical scheme is that：
A kind of application of sodium alginate in terms of magnesium-air cell electrolyte corrosion inhibitor.
Present invention firstly provides sodium alginate for magnesium-air cell electrolyte corrosion inhibitor, the application prospect having had.
A kind of magnesium-air cell electrolyte corrosion inhibitor, including sodium alginate, sodium metasilicate, the sodium alginate, sodium metasilicate
Molar ratio be 0.004~0.4：0.001~0.2.
The concentration of the sodium alginate in the electrolytic solution is 0.004~0.4mol/L.The sodium metasilicate is in the electrolytic solution
Concentration is 0.001~0.2mol/L.
The chemical formula of above-mentioned sodium alginate is (C6H7O6Na)n, it is white or pale yellow powder under room temperature.
The chemical formula of above-mentioned sodium metasilicate is Na2SiO3, it is colourless or white to linen orthorhombic crystal under room temperature.
The mother liquor of above-mentioned electrolyte is sodium chloride solution or Klorvess Liquid, and the concentration of sodium chloride and potassium chloride is 0.2
~2mol/L.
Present invention firstly provides use organic compound sodium alginate (C6H7O6Na)nTo reduce the liberation of hydrogen of magnesium anode from corruption
Erosion rate simultaneously improves magnesium anode activity.(C6H7O6Na)nIt is a kind of green organic compound, it is sufficiently stable in neutral solution, point
Minor by B-D- mannuronic acids (abbreviation M units) and A-L- guluronic acids (abbreviation G units) by (1 → 4) key link and
Into a kind of line-type block polymer, sodium alginate extracts from plant, has good biocompatibility and biological degradability,
It is a kind of " environmentally friendly " material.Sodium alginate is soluble easily in water, meeting and Ca2+、Fe2+、Pb2+Metal ions generation salt is waited, it is insoluble
It is precipitated in water.This feature causes sodium alginate to carry out inhibition for metal tape and provide possibility.
The mechanism of action of typical corrosion inhibiter is in the prior art：By anode reaction or cathode reaction in magnesium anode surface shape
Into protective film (passivating film or the film of protective value), the presence of protective film reduces liberation of hydrogen activation point, makes magnesium anode liberation of hydrogen from corruption
Rate reduction is lost, but be easy to cause anode polarization.And the mechanism of action of sodium alginate is different from general corrosion inhibiter, main function
Have at 2 points：1. containing substantial amounts of hydroxyl and carboxyl in sodium alginate, there are substantial amounts of lone pair electrons in these groups, it can be with magnesium knot
It closes, one layer of organic film of generation is deposited on Mg alloy surface, and protection magnesium alloy is from corrosion, when sodium alginate adds in the solution
When, due to the special dissolubility of sodium alginate (thick colloid can be formed in aqueous solution), solution turned cloudy.But with
Being put into for magnesium alloy sample, these thick substances gradually gather the surface of magnesium alloy, and solution then gradually becomes clarification.
Lone pair electrons absorption in sodium alginate forms one layer of sodium alginate-Mg protective film in Mg alloy surface, by magnesium alloy with
Korrosionsmedium effectively completely cuts off, and has delayed the corrosion of magnesium alloy；2. the molecule of sodium alginate is bigger, (relative mass exists
Between 32000~200000), so can trail in Mg alloy surface, form one layer of film layer for comparing even compact.However,
It is larger just because of sodium alginate volume, easily wind, it is impossible to cover all active sites of Mg alloy surface, but due to
Sodium alginate strand is longer, easily winds, and causes to form many defects in skin covering of the surface；Substantial amounts of hydroxyl and carboxyl and big
The lone pair electrons of amount and reaction product (Mg (OH)2) complex ions are formed, reaction product desorption can be effectively facilitated, makes magnesium positive
Pole continuous activation reduces magnesium anode polarization when magnesium anode discharges, improves discharge performance.The corrosion inhibiter of the present invention can significantly drop
The self-corrosion rate of low anode, and make the open circuit potential of magnesium anode and operating potential also significantly negative shifting.
Also contain auxiliary additive Na in the electrolyte corrosion inhibitor of the present invention2SiO3, suitable Na2SiO3To inhibiting liberation of hydrogen
There is significant effect, and magnesium anode polarization can be reduced, magnesium anode current potential is made to bear shifting.Main cause is SiO3 2-With Mg2+It has occurred
With reference to formation MgSiO3Precipitation, works as MgSiO3Magnesium anode surface is deposited on, anode liberation of hydrogen can be significantly reduced.In addition MgSiO3With Mg
(OH)2Interaction, makes corrosion product Mg (OH)2It is connected with magnesium anode not close and then promotes corrosion product easily from magnesium anode
Upper peeling, so that magnesium anode activates, current potential bears shifting.Excessive SiO3 2-It can mechanically adsorb on magnesium anode surface, hinder corrosion
Liberation of hydrogen.On the basis of individually addition corrosion inhibiter sodium alginate, the compound suitable Na of addition2SiO3, magnesium anode analysis can reduced
While hydrogen self-corrosion, magnesium anode open circuit potential is made to bear shifting, anode efficiency rise.
A kind of magnesium-air cell electrolyte, including electrolyte, sodium alginate, the electrolyte, mole of sodium alginate
Than for 0.2~2：0.004~0.4.Wherein sodium alginate is electrolyte corrosion inhibitor.
The concentration of the sodium alginate in the electrolytic solution is 0.004~0.4mol/L.
Above-mentioned magnesium-air cell electrolyte, further includes sodium metasilicate, and the sodium alginate, the molar ratio of sodium metasilicate are
0.004~0.4：0.001~0.2.
Preferably, the sodium alginate, the molar ratio of sodium metasilicate are 0.004~0.1：0.01.
The concentration of electrolyte is 0.2~2mol/L in the electrolyte, and the concentration of sodium alginate is 0.004~0.4mol/
L, the concentration of sodium metasilicate is 0.001~0.2mol/L.Wherein sodium alginate and sodium metasilicate are electrolyte corrosion inhibitor.
In above-mentioned electrolyte, the concentration of sodium metasilicate is preferably 0.1mol/L.
The concentration of electrolyte is 0.2~2mol/L in the electrolyte, and the concentration of sodium alginate is 0.004~0.1mol/
L, the concentration of sodium metasilicate is 0.01mol/L.
The electrolyte is sodium chloride or potassium chloride.
The preparation method of above-mentioned magnesium-air cell electrolyte, comprises the following steps：By electrolyte, sodium alginate with it is molten
Agent is uniformly mixed to obtain the final product.The solvent is water.
The electrolyte, the molar ratio of sodium alginate are 0.2~2：0.004~0.4.
The concentration of the electrolyte in the electrolytic solution is 0.2~2mol/L.
The electrolyte is sodium chloride or potassium chloride.
The preparation method of above-mentioned magnesium-air cell electrolyte, it is preferred that comprise the following steps：By electrolyte solution, sea
Mosanom and sodium metasilicate mixing are dissolved to obtain the final product.
The preparation method of above-mentioned magnesium-air cell electrolyte, it is preferred that comprise the following steps：First sodium alginate is added
Enter into electrolyte solution, mixed dissolution, then add sodium metasilicate, mixed dissolution to get.
The electrolyte solution is sodium chloride solution or Klorvess Liquid.
The electrolyte, sodium alginate, the molar ratio of sodium metasilicate are 0.2~2：0.004~0.4：0.001~0.2.
A kind of magnesium-air cell, including electrolyte, the electrolyte is above-mentioned magnesium-air cell electrolyte.
Magnesium-air cell electrolyte corrosion inhibitor of the present invention, component form it is simple, it is at low cost, safety and meet environmental protection
It is required that it can not only significantly reduce the liberation of hydrogen self-corrosion rate of magnesium anode, moreover it is possible to make the open circuit potential of magnesium anode and impressed current item
The significantly negative shifting of operating potential under part, anode efficiency rise make Magnesium anode alloy possess good corrosion resistance and higher electrification
Activity is learned, to meet the requirement of neutral magnesium-air cell high current density discharge.
The present invention magnesium-air cell electrolyte, electrolyte corrosion inhibitor using the present invention, can control neutral magnesium-
Air cell gas-evolving electrodes are too fast, and can guarantee that Magnesium anode alloy has higher electro-chemical activity, to improving battery performance, prolong
The long discharge service life is of great significance, beneficial to large-scale promotion application.
The preparation method of magnesium-air cell electrolyte of the present invention, raw material is simple, at low cost, easy to operate, has
Application prospect.
Specific embodiment
Following embodiments are only described in further detail the present invention, but do not form any limitation of the invention.
Embodiment 1
Magnesium-the air cell of the present embodiment is sodium alginate with electrolyte corrosion inhibitor, and concentration in the electrolytic solution is
0.004mol/L。
The magnesium of the present embodiment-air cell electrolyte, the electrolyte are the mixed aqueous solution of sodium chloride and sodium alginate,
The concentration 0.6mol/L of sodium chloride in the electrolytic solution, the concentration of sodium alginate in the electrolytic solution are 0.004mol/L.
The preparation method of the magnesium of the present embodiment-air cell electrolyte, comprises the following steps：
First compound concentration is the sodium chloride solution of 0.6mol/L, adds in the sodium alginate of precise, and stirring, dissolving are complete
.
Magnesium-the air cell of the present embodiment, including anode, cathode, electrolyte, the electrolyte uses above-mentioned magnesium-air
Battery electrolytic solution.
Embodiment 2
The magnesium of the present embodiment-air cell electrolyte corrosion inhibitor, is made of sodium alginate and sodium metasilicate, sodium alginate with
The molar ratio of sodium metasilicate is 0.3:0.001.Wherein the concentration of sodium alginate in the electrolytic solution be 0.3mol/L, auxiliary additive silicon
The concentration of sour sodium in the electrolytic solution is 0.001mol/L.
The magnesium of the present embodiment-air cell electrolyte, the electrolyte are the mixing of sodium chloride, sodium alginate and sodium metasilicate
Aqueous solution, the concentration 1mol/L of sodium chloride in the electrolytic solution, the concentration of sodium alginate in the electrolytic solution be 0.3mol/L, sodium metasilicate
Concentration in the electrolytic solution is 0.001mol/L.
The preparation method of the magnesium of the present embodiment-air cell electrolyte, comprises the following steps：First compound concentration is
The sodium chloride solution of 1mol/L, adds in the sodium alginate of precise, and stirring, dissolving are complete；Accurately claim according still further to constituent content
Sodium metasilicate is taken, is added in the sodium chloride solution dissolved with sodium alginate, stirring and dissolving.
Magnesium-the air cell of the present embodiment, including anode, cathode and electrolyte, wherein electrolyte uses above-mentioned magnesium-air
Battery electrolytic solution.
Embodiment 3
Magnesium-the air cell of the present embodiment is sodium alginate with electrolyte corrosion inhibitor；Sodium alginate in the electrolytic solution dense
It spends for 0.1mol/L.
The magnesium of the present embodiment-air cell electrolyte, is the mixed aqueous solution of sodium chloride and sodium alginate, and sodium chloride exists
Concentration 0.2mol/L in electrolyte, the concentration of sodium alginate in the electrolytic solution are 0.1mol/L.
The preparation method of the magnesium of the present embodiment-air cell electrolyte, comprises the following steps：
First compound concentration is the sodium chloride solution of 0.2mol/L, adds in the sodium alginate of precise, and stirring, dissolving are complete
.
Magnesium-the air cell of the present embodiment, including anode, cathode and electrolyte, wherein electrolyte uses above-mentioned magnesium-air
Battery electrolytic solution.
Embodiment 4
The magnesium of the present embodiment-air cell electrolyte corrosion inhibitor, is made of sodium alginate and sodium metasilicate, sodium alginate and
The molar ratio of sodium metasilicate is 0.01:0.2.The concentration of sodium alginate in the electrolytic solution be 0.01mol/L, auxiliary additive sodium metasilicate
Concentration in the electrolytic solution is 0.2mol/L.
The magnesium of the present embodiment-air cell electrolyte is the mixed aqueous solution of sodium chloride, sodium alginate and sodium metasilicate,
The concentration 1.3mol/L of sodium chloride in the electrolytic solution, the concentration of sodium alginate in the electrolytic solution are 0.01mol/L, and sodium metasilicate exists
Concentration in electrolyte is 0.2mol/L.
The preparation method of the magnesium of the present embodiment-air cell electrolyte, comprises the following steps：First compound concentration is
The sodium chloride solution of 1.3mol/L, adds in the sodium alginate of precise, and stirring, dissolving are complete；It is accurate according still further to constituent content
Sodium metasilicate is weighed, is added in the sodium chloride solution dissolved with sodium alginate, stirring and dissolving.
Magnesium-the air cell of the present embodiment, including anode, cathode and electrolyte, wherein electrolyte uses above-mentioned magnesium-air
Battery electrolytic solution.
Embodiment 5
The magnesium of the present embodiment-air cell electrolyte corrosion inhibitor, is made of sodium alginate and sodium metasilicate, sodium alginate and
The molar ratio of sodium metasilicate is 0.2:0.01.Wherein, the concentration of sodium alginate in the electrolytic solution be 0.2mol/L, auxiliary additive
The concentration of sodium metasilicate in the electrolytic solution is 0.01mol/L.
The magnesium of the present embodiment-air cell electrolyte is the mixed aqueous solution of sodium chloride, sodium alginate and sodium metasilicate,
The concentration 2mol/L of sodium chloride in the electrolytic solution, the concentration of sodium alginate in the electrolytic solution are 0.2mol/L, and sodium metasilicate is being electrolysed
Concentration in liquid is 0.01mol/L.
The preparation method of the magnesium of the present embodiment-air cell electrolyte, comprises the following steps：First compound concentration is
The sodium chloride solution of 2mol/L, adds in the sodium alginate of precise, and stirring, dissolving are complete；Accurately claim according still further to constituent content
Sodium metasilicate is taken, is added in the sodium chloride solution dissolved with sodium alginate, stirring and dissolving.
Magnesium-the air cell of the present embodiment, including anode, cathode and electrolyte, wherein electrolyte uses above-mentioned magnesium-air
Battery electrolytic solution.
Embodiment 6
Magnesium-the air cell of the present embodiment is sodium alginate with electrolyte corrosion inhibitor.Sodium alginate in the electrolytic solution dense
It spends for 0.08mol/L.
The magnesium of the present embodiment-air cell electrolyte, is the mixed aqueous solution of sodium chloride and sodium alginate, and sodium chloride exists
Concentration 1.5mol/L in electrolyte, the concentration of sodium alginate in the electrolytic solution are 0.08mol/L.
The preparation method of the magnesium of the present embodiment-air cell electrolyte, comprises the following steps：
First compound concentration is the sodium chloride solution of 1.5mol/L, adds in the sodium alginate of precise, and stirring, dissolving are complete
.
Magnesium-the air cell of the present embodiment, including anode, cathode and electrolyte, wherein electrolyte uses above-mentioned magnesium-air
Battery electrolytic solution.
Embodiment 7
The magnesium of the present embodiment-air cell electrolyte corrosion inhibitor, is made of sodium alginate and sodium metasilicate, sodium alginate and
The molar ratio of sodium metasilicate is 0.4:0.005.Wherein, the concentration of sodium alginate in the electrolytic solution be 0.4mol/L, auxiliary additive
The concentration of sodium metasilicate in the electrolytic solution is 0.005mol/L.
The magnesium of the present embodiment-air cell electrolyte is the mixed aqueous solution of sodium chloride, sodium alginate and sodium metasilicate,
The concentration 1.8mol/L of sodium chloride in the electrolytic solution, the concentration of sodium alginate in the electrolytic solution are 0.4mol/L, and sodium metasilicate is in electricity
It is 0.005mol/L to solve the concentration in liquid.
The preparation method of the magnesium of the present embodiment-air cell electrolyte, comprises the following steps：First compound concentration is
The sodium chloride solution of 1.8mol/L, adds in the sodium alginate of precise, and stirring, dissolving are complete；It is accurate according still further to constituent content
Sodium metasilicate is weighed, is added in the sodium chloride solution dissolved with sodium alginate, stirring and dissolving.
Magnesium-the air cell of the present embodiment, including anode, cathode and electrolyte, wherein electrolyte uses above-mentioned magnesium-air
Battery electrolytic solution.
Embodiment 8
The magnesium of the present embodiment-air cell electrolyte corrosion inhibitor, by sodium alginate and sodium metasilicate form sodium alginate and
The molar ratio of sodium metasilicate is 0.04:0.15.The concentration of sodium alginate in the electrolytic solution be 0.04mol/L, auxiliary additive silicic acid
The concentration of sodium in the electrolytic solution is 0.15mol/L.
The magnesium of the present embodiment-air cell electrolyte is the mixed aqueous solution of sodium chloride, sodium alginate and sodium metasilicate,
The concentration 0.8mol/L of sodium chloride in the electrolytic solution, the concentration of sodium alginate in the electrolytic solution are 0.04mol/L, and sodium metasilicate exists
Concentration in electrolyte is 0.15mol/L.
The preparation method of the magnesium of the present embodiment-air cell electrolyte, comprises the following steps：First compound concentration is
The sodium chloride solution of 0.8mol/L, adds in the sodium alginate of precise, and stirring, dissolving are complete；It is accurate according still further to constituent content
Sodium metasilicate is weighed, is added in the sodium chloride solution dissolved with sodium alginate, stirring and dissolving.
Magnesium-the air cell of the present embodiment, including anode, cathode and electrolyte, wherein electrolyte uses above-mentioned magnesium-air
Battery electrolytic solution.
Embodiment 9
The magnesium of the present embodiment-air cell electrolyte corrosion inhibitor, by sodium alginate and sodium metasilicate form sodium alginate and
The molar ratio of sodium metasilicate is 0.004:0.15.The concentration of sodium alginate in the electrolytic solution be 0.004mol/L, auxiliary additive silicon
The concentration of sour sodium in the electrolytic solution is 0.15mol/L.
The magnesium of the present embodiment-air cell electrolyte is the mixed aqueous solution of potassium chloride, sodium alginate and sodium metasilicate,
The concentration 0.2mol/L of potassium chloride in the electrolytic solution, the concentration of sodium alginate in the electrolytic solution are 0.004mol/L, and sodium metasilicate exists
Concentration in electrolyte is 0.15mol/L.
The preparation method of the magnesium of the present embodiment-air cell electrolyte, comprises the following steps：First compound concentration is
The Klorvess Liquid of 0.2mol/L, adds in the sodium alginate of precise, and stirring, dissolving are complete；It is accurate according still further to constituent content
Sodium metasilicate is weighed, is added in the sodium chloride solution dissolved with sodium alginate, stirring and dissolving.
Magnesium-the air cell of the present embodiment, including anode, cathode and electrolyte, wherein electrolyte uses above-mentioned magnesium-air
Battery electrolytic solution.
Experimental example
Self-corrosion rate in the electrolyte prepared using weight-loss method test 2N magnesium anodes in embodiment 1-8 under static state, is surveyed
Time 48h is tried, the results detailed in the following table 1.Above-mentioned 2N magnesium is 99wt.%Mg.2N magnesium anodes are tested above-mentioned using three-electrode system
At open circuit potential in electrolyte and 25 DEG C, 100mA/cm2Operating potential under current density.With 2N magnesium anodes in 0.6mol/L
Self-corrosion rate, open circuit potential, operating potential, anode efficiency in sodium chloride electrolyte compare.
Chemical property of the 1 2N magnesium anodes of table in Examples 1 to 8 and comparative example electrolyte
From table 1 it follows that self-corrosion rate of the above-mentioned anode in electrolyte of the embodiment of the present invention for 0.03~
0.21mg/cm2H, open circuit potential and operating potential are respectively -1.86~-1.58V (vs.SCE) and -1.75~-1.15V
(vs.SCE), anode efficiency is 49~90%；Compared with the data that it is tested in 0.6M sodium chloride electrolytes, self-corrosion rate
Reduced, the significantly negative shifting of open circuit potential and operating point position, anode efficiency is significantly raised.
Claims (10)
1. a kind of application of sodium alginate in terms of magnesium-air cell electrolyte corrosion inhibitor.
2. a kind of magnesium-air cell electrolyte corrosion inhibitor, which is characterized in that including sodium alginate, sodium metasilicate, the alginic acid
Sodium, the molar ratio of sodium metasilicate are 0.004~0.4：0.001~0.2.
3. a kind of magnesium-air cell electrolyte, which is characterized in that including electrolyte, sodium alginate, the electrolyte, seaweed
The molar ratio of sour sodium is 0.2~2：0.004~0.4.
4. electrolyte according to claim 3, which is characterized in that the concentration of the sodium alginate in the electrolytic solution is
0.004~0.4mol/L.
5. electrolyte according to claim 3, which is characterized in that further include sodium metasilicate, the sodium alginate, sodium metasilicate
Molar ratio is 0.004~0.4：0.001~0.2.
6. electrolyte according to claim 5, which is characterized in that the sodium alginate, the molar ratio of sodium metasilicate are 0.001
~0.1：0.01.
7. electrolyte according to claim 5, which is characterized in that in the electrolyte concentration of electrolyte for 0.2~
2mol/L, the concentration of sodium alginate is 0.004~0.4mol/L, and the concentration of sodium metasilicate is 0.001~0.2mol/L.
8. a kind of preparation method of magnesium as claimed in claim 3-air cell electrolyte, which is characterized in that including following
Step：Electrolyte, sodium alginate are uniformly mixed with solvent to obtain the final product.
9. the preparation method of magnesium according to claim 8-air cell electrolyte, which is characterized in that including following step
Suddenly：Sodium alginate is added in electrolyte solution, mixed dissolution, then adds sodium metasilicate, mixed dissolution to get.
10. a kind of magnesium-air cell, including electrolyte, which is characterized in that the electrolyte is magnesium-sky described in claim 3
Gas battery electrolytic solution.
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| CN110137631A (en) * | 2019-04-28 | 2019-08-16 | 中南大学 | A kind of composite corrosion inhibitor and its alkaline electrolyte and aluminum-air battery for adding the composite corrosion inhibitor |
| CN111430741A (en) * | 2020-04-13 | 2020-07-17 | 中国地质大学（武汉） | Alkaline electrolyte composite corrosion inhibitor and aluminum-air battery |
| CN112542596A (en) * | 2019-09-23 | 2021-03-23 | 易航时代(北京)科技有限公司 | Self-corrosion-resistant metal-air battery and preparation method and application thereof |
| CN112635781A (en) * | 2020-12-21 | 2021-04-09 | 中国电子科技集团公司第十八研究所 | Method for prolonging storage life of magnesium seawater battery |
| CN113078331A (en) * | 2021-03-24 | 2021-07-06 | 世能氢电科技有限公司 | Electrolyte of hydrogen battery and application thereof |
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| CN110137631A (en) * | 2019-04-28 | 2019-08-16 | 中南大学 | A kind of composite corrosion inhibitor and its alkaline electrolyte and aluminum-air battery for adding the composite corrosion inhibitor |
| CN112542596A (en) * | 2019-09-23 | 2021-03-23 | 易航时代(北京)科技有限公司 | Self-corrosion-resistant metal-air battery and preparation method and application thereof |
| CN112542596B (en) * | 2019-09-23 | 2023-07-11 | 易航时代(北京)科技有限公司 | Self-corrosion-resistant metal-air battery and preparation method and application thereof |
| CN111430741A (en) * | 2020-04-13 | 2020-07-17 | 中国地质大学（武汉） | Alkaline electrolyte composite corrosion inhibitor and aluminum-air battery |
| CN112635781A (en) * | 2020-12-21 | 2021-04-09 | 中国电子科技集团公司第十八研究所 | Method for prolonging storage life of magnesium seawater battery |
| CN113078331A (en) * | 2021-03-24 | 2021-07-06 | 世能氢电科技有限公司 | Electrolyte of hydrogen battery and application thereof |
| CN113078331B (en) * | 2021-03-24 | 2023-01-13 | 世能氢电科技有限公司 | Electrolyte of hydrogen battery and application thereof |
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