CN105845884A - Mg-Li-Al alloy electrode modified by cerium-rich mixed rare earth elements for sea cell and preparation method of Mg-Li-Al alloy electrode - Google Patents
Mg-Li-Al alloy electrode modified by cerium-rich mixed rare earth elements for sea cell and preparation method of Mg-Li-Al alloy electrode Download PDFInfo
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- CN105845884A CN105845884A CN201610312264.XA CN201610312264A CN105845884A CN 105845884 A CN105845884 A CN 105845884A CN 201610312264 A CN201610312264 A CN 201610312264A CN 105845884 A CN105845884 A CN 105845884A
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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
- H01M6/30—Deferred-action cells
- H01M6/32—Deferred-action cells activated through external addition of electrolyte or of electrolyte components
- H01M6/34—Immersion cells, e.g. sea-water cells
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/06—Electrodes for primary cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01M4/06—Electrodes for primary cells
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/46—Alloys based on magnesium or aluminium
- H01M4/466—Magnesium based
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Abstract
The invention relates to an Mg-Li-Al alloy electrode modified by cerium-rich mixed rare earth elements for a sea cell and a preparation method of the Mg-Li-Al alloy electrode. The alloy electrode comprises the constituents: 80-90% of Mg, 5-14% of Li, 0.5-3.5% of Al and 0.1-3% of RE. A multi-element Mg-Li-Al-RE alloy electrode is prepared through simultaneously adding the cerium-rich mixed rare earth elements and metal aluminum into Mg-Li based alloy by a vacuum melting technology, the discharge current density and the corrosion resistance of the Mg-Li based alloy electrode are improved, the discharge performance of the multi-element Mg-Li-Al-RE alloy electrode is obviously higher than that of the traditional Mg-Li based alloy electrode, the discharge current density is improved, the corrosion resistance is also improved, and the service lifetime is prolonged.
Description
Technical field
The invention belongs to seawater battery technical field, particularly relate to utilize the element modified seawater battery of cerium-rich mischmetal
Mg-Li-Al alloy electrode and preparation method.
Background technology
Underwater ordnance high-power battery mainly has zinc-silver oxide battery and aluminum-silver oxide cell at present, and its specific energy all exists
160Wh kg-1Hereinafter, and the rising space is extremely limited.Magnesium metal (Mg) has that electrode potential is negative, theoretical specific capacity
(2205Ah kg greatly-1), high (the 6.8kWh kg of specific energy-1), the advantage such as cheap, environmentally friendly, have excellent
Different discharge performance, it has also become a kind of important electrochemical anode material.Using magnesium and magnesium alloy as all kinds of magnesium of anode sea
Water battery (such as magnesium-sea-water activated battery, magnesium-hydrogen peroxide semi-fuel battery and magnesium-seawater dissolved oxygen semi-fuel cell) has
Have that energy density is high, electric discharge steadily, storage time length, the feature such as safe and reliable and cheap, have become as current ocean energy
One focus received much concern of source domain.
In recent years, a kind of novel Mg-Li base alloy starts to be paid close attention to by people, just as the anode material of seawater battery
Becoming one, marine energy field study hotspot.Lithium metal (Li) is the most active anode material.Its equilibrium potential ratio
Mg is more negative, its electrochemical equivalent (3.86Ah g-1) and theoretical specific energy (13.0kWh kg-1) it is above metal Mg,
Li Yu Mg is formed Mg-Li base alloy, by means of high electric discharge activity and the high-energy-density of Li, magnesium sun can be improved
The electric discharge activity of pole, reduces " hysteresis effect ", improves the specific energy of Magnesium sea water battery.
Rare earth element, owing to having the extranuclear strucure of uniqueness, has a wide range of applications at metallurgical, Material Field.As only
Change metal bath, refining alloy tissue, improve material mechanical performance and decay resistance etc., have been widely used for magnesium and close
The modification of gold, wherein rare-earth element cerium (Ce) is applied the most extensive.But expensive due to pure rare earth element, thus
Limit rare earth element application in magnesium alloy electrode.
Summary of the invention
In order to improve discharge current and the technological approaches of discharging efficiency of Mg-Li base alloy electrode simultaneously；Improve further
The discharge performance of Mg-Li base alloy, the discharge current density of solution seawater battery Mg-Li base alloy electrode is little and uses the longevity
Ordering short problem, cerium-rich mischmetal (RE) and metal Al element are joined by the present invention simultaneously as alloying element
In Mg-Li base alloy, it is proposed that a kind of polynary Mg-Li-Al-RE alloy, become the high performance anode material of seawater battery.
Technical scheme is as follows:
A kind of polynary Mg-Li--Al-RE alloy electrode, composition and the weight/mass percentage composition of its alloy electrode are as follows:
Mg:80-90%；
Li:5-14%；
Al:0.5-3.5%；
RE:0.1-3%.
Described cerium-rich mischmetal element (RE) purity is 98%-99%, containing Ce:45%-51%, La:23%-28%,
Pr:5%-7%, Nd:12%-17%, nonmetallic inclusion content < 1%.
The preparation method of the polynary Mg-Li--Al-RE alloy electrode of the present invention, its step is as follows:
1) in vacuum melting furnace, first crucible is preheated to kermesinus, adds the pure magnesium ingot through drying, start to be passed through SF6
+CO2Mixed gas；
2) at SF6+CO2Under gas shield, it is continuously heating to 700～720 DEG C, adds fine aluminium ingot；
3) it is warmed up to when 760～790 DEG C add magnesium-cerium-rich mischmetal (Mg-RE) intermediate alloy, treats whole raw material
After fusing, stir；
4), after alloy melting is good, magnesium oxide and the coverture mixture of surface efflorescence is removed, 770～800 DEG C of standings
More than 30min, then pours into a mould；
5), after cast, gained alloy sample is incubated 10h in vacuum heat treatment furnace at a temperature of 300 DEG C；Obtain
Mg-Li--Al-RE alloy electrode.
Described vacuum melting furnace is vacuum resistance smelting furnace or vacuum induction melting furnace.
Due to the density difference great disparity of rare earth element with magnesium metal, the fusing point of most of rare earth elements is higher than the fusing point of magnesium, and two
Person be difficult at a lower temperature Direct Uniform consolute and do not produce component segregation.In order to solve this problem, this patent uses
Mischmetal magnesium intermediate alloy (Mg-RE alloy) is as the addition carrier of cerium-rich mischmetal element, to eliminate magnesium alloy
Component segregation, make the even tissue of Mg-Li base alloy.
The present invention has the advantage that and good effect:
1. contain the corrosion in 3.5% sodium-chloride water solution of the polynary Mg-Li--Al-RE alloy electrode of cerium-rich mischmetal element
Current potential is more than-1.55V (vs.SCE), and under-1.0V voltage, (vs.SCE) discharge current density is more than 42mA/cm2,
Discharge performance, apparently higher than traditional Mg-Li base alloy electrode, not only increases discharge current density, also improves it anti-corrosion
Performance and used life.
2., relative to the element modified technology of pure rare earth, use mixed rare-earth elements to be modified, reduce Mg-Li-Al-RE base
The preparation cost of electrode.
Accompanying drawing explanation
The microscopic structure (chemical polishing) of Fig. 1 (a) low range polynary Mg-5Li-2Al-3RE alloy electrode sample
The microscopic structure (chemical polishing) of Fig. 1 (b) high magnification polynary Mg-5Li-2Al-3RE alloy electrode sample
Detailed description of the invention
More than 1 yuan of Mg-14Li-3.5Al-2.5RE alloy electrode of embodiment,
The composition (mass fraction) of this alloy electrode is: Mg:80%, Li:14%, Al:3.5%, RE:2.5%.
The preparation process of this alloy electrode: in vacuum resistance furnace, is first preheated to kermesinus by crucible, adds through overbaking
Dry pure magnesium ingot, starts to be passed through SF6+CO2Mixed gas；At SF6+CO2Under gas shield, it is continuously heating to 700 DEG C,
Add fine aluminium ingot；It is warmed up to when 760 DEG C add magnesium-cerium-rich mischmetal (Mg-RE) intermediate alloy, treats whole raw material
After fusing, stir；After alloy melting is good, remove magnesium oxide and the coverture mixture of surface efflorescence, at 770 DEG C
Stand more than 30min, then pour into a mould；After cast, gained alloy sample in vacuum heat treatment furnace at a temperature of 300 DEG C
Insulation 10h；Obtain polynary Mg-14Li-3.5Al-0.1RE alloy electrode.
This alloy electrode discharge performance in 3.5%NaCl solution: corrosion potential is-1.54V (vs.SCE), permanent
Pressure discharge current density is 47.2mA/cm2(-1.0V vs.SCE)。
More than 2 yuan of Mg-5Li-2Al-3RE alloy electrode of embodiment
The composition (mass fraction) of this alloy electrode is: Mg:90%, Li:5%, Al:2%, RE:3%.
The preparation process of this alloy electrode: in vacuum resistance furnace, is first preheated to kermesinus by crucible, adds through overbaking
Dry pure magnesium ingot, starts to be passed through SF6+CO2Mixed gas；At SF6+CO2Under gas shield, it is continuously heating to
710 DEG C, add fine aluminium ingot；It is warmed up to when 770 DEG C add magnesium-cerium-rich mischmetal (Mg-RE) intermediate alloy, treats complete
After portion's melting sources, stir；After alloy melting is good, remove magnesium oxide and the coverture mixture of surface efflorescence,
780 DEG C stand more than 30min, then pour into a mould；After cast, gained alloy sample in vacuum heat treatment furnace in 300 DEG C
At a temperature of be incubated 10h；Obtain polynary Mg-8.5Li-0.5Al-1RE electrode.
This alloy electrode chemical property in 3.5%NaCl solution: corrosion potential is-1.49V (vs.SCE),
Constant voltage discharge electric current density is 45.1mA/cm2(-1.0V vs.SCE)。
More than 3 yuan of Mg-12.9Li-0.5Al-1.6RE alloy electrode of embodiment
The composition (mass fraction) of this alloy electrode is: Mg:85%, Li:12.9%, Al:0.5%, RE:1.6%.
The preparation process of this alloy electrode: in vacuum resistance furnace, is first preheated to kermesinus by crucible, adds through drying
Pure magnesium ingot, start to be passed through SF6+CO2Mixed gas；At SF6+CO2Under gas shield, it is continuously heating to 715 DEG C,
Add fine aluminium ingot；It is warmed up to when 780 DEG C add magnesium-cerium-rich mischmetal (Mg-RE) intermediate alloy, treats whole raw material
After fusing, stir；After alloy melting is good, remove magnesium oxide and the coverture mixture of surface efflorescence,
770～800 DEG C stand more than 30min, then pour into a mould；After cast, gained alloy sample in vacuum heat treatment furnace in
10h it is incubated at a temperature of 300 DEG C；Obtain polynary 85Mg-12.9Li-0.5Al-1.6RE alloy electrode.
This alloy electrode chemical property in 3.5%NaCl solution: corrosion potential is-1.47V (vs.SCE),
Constant voltage discharge electric current density is 43.4mA/cm2(-1.0V vs.SCE)。
More than 4 yuan of Mg-9.5Li-2.3Al-0.2RE alloy electrode of embodiment
The composition (mass fraction) of this alloy electrode is: Mg:88%, Li:9.5%, Al:2.3%, RE:0.2%.
The preparation process of this alloy electrode: in vacuum resistance furnace, is first preheated to kermesinus by crucible, adds through overbaking
Dry pure magnesium ingot, starts to be passed through SF6+CO2Mixed gas；At SF6+CO2Under gas shield, it is continuously heating to
720 DEG C, add fine aluminium ingot；It is warmed up to when 790 DEG C add magnesium-cerium-rich mischmetal (Mg-RE) intermediate alloy, treats complete
After portion's melting sources, stir；After alloy melting is good, remove magnesium oxide and the coverture mixture of surface efflorescence,
770～800 DEG C stand more than 30min, then pour into a mould；After cast, gained alloy sample in vacuum heat treatment furnace in
10h it is incubated at a temperature of 300 DEG C；Obtain polynary Mg-9.5Li-2.3Al-0.2RE alloy electrode.
This alloy chemical property in 3.5%NaCl solution: corrosion potential is-1.43V (vs.SCE), constant voltage
Discharge current density is 42.5mA/cm2(-1.0V vs.SCE)。
The present invention open and propose utilize cerium-rich mischmetal element modified seawater battery Mg-Li-Al alloy electrode and system
Preparation Method, those skilled in the art can suitably change the links such as condition route realize by using for reference present disclosure, although this
Alloy electrode composition and the technology of preparing of invention are described by preferred embodiment, the obvious energy of person skilled
In without departing from present invention, spirit and scope, material described herein composition and technology path are modified or again
Combination, realizes final alloy electrode.Special needs to be pointed out is, all similar replacements and change are to this area
Being apparent from for technical staff, they are considered as being included in present invention spirit, scope and content.
Claims (4)
1. a polynary Mg-Li--Al-RE alloy electrode, is characterized in that the composition of alloy electrode and weight/mass percentage composition are as follows:
Mg:80-90%；
Li:5-14%；
Al:0.5-3.5%；
Cerium-rich mischmetal element: 0.1-3%.
2. alloy electrode as claimed in claim 1, is characterized in that described cerium-rich mischmetal elemental purity is 98%-99%, containing Ce:
45%-51%, La:23%-28%, Pr:5%-7%, Nd:12%-17%, nonmetallic inclusion content < 1%.
3. the preparation method of many yuan of Mg-Li--Al-RE alloy electrodes of claim 1, is characterized in that
1) in vacuum melting furnace, first crucible is preheated to kermesinus, adds the pure magnesium ingot through drying, start to be passed through SF6
+CO2Mixed gas；
2) at SF6+CO2Under gas shield, it is continuously heating to 700～720 DEG C, adds fine aluminium ingot；
3) it is warmed up to when 760～790 DEG C add magnesium-mischmetal (Mg-RE) intermediate alloy, after whole melting sources, stirs
Mix uniformly；
4), after alloy melting is good, removes magnesium oxide and the coverture mixture of surface efflorescence, stand 30min at 770～800 DEG C
Above, then pour into a mould；
5), after cast, gained alloy sample is incubated 10h in vacuum heat treatment furnace at a temperature of 300 DEG C；Obtain Mg-Li--Al-RE
Alloy electrode.
4. method as claimed in claim 3, is characterized in that described vacuum melting furnace is vacuum resistance smelting furnace or vacuum induction melting
Stove.
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| CN201610312264.XA CN105845884A (en) | 2016-05-11 | 2016-05-11 | Mg-Li-Al alloy electrode modified by cerium-rich mixed rare earth elements for sea cell and preparation method of Mg-Li-Al alloy electrode |
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| CN201610312264.XA CN105845884A (en) | 2016-05-11 | 2016-05-11 | Mg-Li-Al alloy electrode modified by cerium-rich mixed rare earth elements for sea cell and preparation method of Mg-Li-Al alloy electrode |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108660347A (en) * | 2018-07-30 | 2018-10-16 | 上海交通大学 | A kind of tough Mg-Li-Al-Y alloys of height and preparation method thereof containing rich Ce mischmetals |
| CN109136598A (en) * | 2018-09-28 | 2019-01-04 | 河南科技大学 | A kind of magnalium indium rare earth anode material and preparation method thereof, magnesium air battery |
| CN111020325A (en) * | 2019-12-18 | 2020-04-17 | 佛山科学技术学院 | Corrosion-resistant magnesium-lithium alloy |
| CN111279004A (en) * | 2017-08-30 | 2020-06-12 | M.A.医疗联盟股份有限公司 | Metal alloy and medical device containing same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040241036A1 (en) * | 2001-06-11 | 2004-12-02 | Andrea Meyer-Lindenberg | Medical implant for the human or animal body |
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2016
- 2016-05-11 CN CN201610312264.XA patent/CN105845884A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040241036A1 (en) * | 2001-06-11 | 2004-12-02 | Andrea Meyer-Lindenberg | Medical implant for the human or animal body |
Non-Patent Citations (2)
| Title |
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| 林亚青，等: ""镁海水电池及镁阳极材料的研究进展"", 《材料保护》 * |
| 王学新: ""Mg，Mg-Li，Mg-Li-Al-Y 和 Mg-Li-Al-Zn 合金的电化学性能的研究"", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111279004A (en) * | 2017-08-30 | 2020-06-12 | M.A.医疗联盟股份有限公司 | Metal alloy and medical device containing same |
| CN111279004B (en) * | 2017-08-30 | 2023-03-14 | M.A.医疗联盟股份有限公司 | Metal alloy and medical device containing same |
| CN108660347A (en) * | 2018-07-30 | 2018-10-16 | 上海交通大学 | A kind of tough Mg-Li-Al-Y alloys of height and preparation method thereof containing rich Ce mischmetals |
| CN109136598A (en) * | 2018-09-28 | 2019-01-04 | 河南科技大学 | A kind of magnalium indium rare earth anode material and preparation method thereof, magnesium air battery |
| CN111020325A (en) * | 2019-12-18 | 2020-04-17 | 佛山科学技术学院 | Corrosion-resistant magnesium-lithium alloy |
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