CN109781792B - Method for representing electrochemical activity of aluminum anode material through conductivity - Google Patents
Method for representing electrochemical activity of aluminum anode material through conductivity Download PDFInfo
- Publication number
- CN109781792B CN109781792B CN201910185174.2A CN201910185174A CN109781792B CN 109781792 B CN109781792 B CN 109781792B CN 201910185174 A CN201910185174 A CN 201910185174A CN 109781792 B CN109781792 B CN 109781792B
- Authority
- CN
- China
- Prior art keywords
- anode material
- conductivity
- aluminum
- aluminum anode
- electrochemical activity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- Y02E60/10—Energy storage using batteries
Landscapes
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
Abstract
The invention discloses a method for representing electrochemical activity of an aluminum anode material by conductivity, and relates to the technical field of aluminum-air battery preparation. The specific characterization method is as follows: grinding an aluminum anode material to be characterized, and measuring the conductivity of the aluminum anode material; the value of the electrical conductivity is inversely proportional to the electrochemical activity of the aluminium anode material, i.e. the lower the electrical conductivity the better the electrochemical activity of the corresponding material. The characterization method has the characteristics of no damage, rapidness, accuracy and easiness in operation; the method for testing the electrochemical activity of the characterization material by using the conductivity can quickly and accurately characterize the aluminum anode material with high electrochemical activity.
Description
Technical Field
The invention relates to the technical field of aluminum-air battery preparation, in particular to a method for representing electrochemical activity of an aluminum anode material by using conductivity.
Background
Batteries play an indispensable role in various industries and fields worldwide, and are used as starting, standby, power or energy storage power sources in the fields of automobiles, aviation, telecommunications, computers, communication equipment and the like.
Compared with a lithium ion battery, the aluminum air battery has the characteristics of rich resources, high energy density, good safety performance, high added value of byproducts and the like, and is a battery with great development potential. However, the anode material of the aluminum air battery has some problems in the using process, wherein the contradiction between the corrosion resistance and the discharge activity of the aluminum anode material in the electrolyte solution is one of the key problems which need to be solved urgently. Good aluminum anode materials are required to maintain high discharge activity (i.e., high discharge voltage and discharge current) while improving corrosion resistance. Conventional means for studying the corrosion resistance and electrochemical activity of aluminum anode materials include hydrogen evolution, weight loss, electrochemical analysis and discharge behavior tests. The above test methods are all loss detection and have large time-consuming error.
A number of research facts indicate that: the compact oxide film on the surface of the pure aluminum improves the corrosion resistance of the aluminum anode material on one hand, and greatly reduces the electrochemical activity of the material on the other hand. The addition of micro-alloying elements to pure aluminum anode materials is one of the common methods for improving the electrochemical activity of the anode materials, and the commonly added alloying elements include Ga, In, Mg, Hg, Sn, and the like. The fact that the alloy elements improve the electrochemical activity of the material is that the alloy elements are in solid solution into an aluminum matrix, and the physical property of a dense oxide film on the surface of the material is changed. The test of the conductivity of the aluminum alloy by an eddy current conductivity meter is a common means for representing the solid solution and nano precipitation degree of the aluminum alloy material. The test principle is that when alternating current with determined frequency and amplitude is carried to be close to the surface of the aluminum alloy, an alternating magnetic field generated by the alternating current in a coil induces eddy currents on the surface and the near surface of the aluminum alloy, the magnetic field of the induced eddy currents reacts on the coil, and the magnitude of the reaction is related to the conductivity of the surface and the near surface of the aluminum alloy. The conductivity of the electrical conductor can be measured directly by an instrument calibrated in conductivity units. Because the amount of the alloy elements added into the aluminum anode material is very small, most of the alloy elements are dissolved into an aluminum matrix in a solid way, the lattice distortion of the matrix is easily caused, the conduction of electrons in the material is reduced, and the conductivity of the material is reduced.
Disclosure of Invention
Aiming at various problems existing in the existing means for representing the electrochemical activity of the aluminum anode material, the invention provides a method for representing the electrochemical activity of the aluminum anode material by conductivity, which quantitatively represents the solid solubility of a microalloy element in an aluminum matrix by measuring the surface conductivity of the aluminum anode material, thereby rapidly representing and screening the anode material with higher electrochemical activity.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a conductivity characterization method for the electrochemical activity of an aluminum anode material is characterized in that the conductivity of the aluminum anode material to be characterized is measured after the aluminum anode material is subjected to sample grinding treatment; the value of the electrical conductivity is inversely proportional to the electrochemical activity of the aluminum anode material, i.e. the lower the electrical conductivity, the better the electrochemical activity of the corresponding material.
Preferably, the instrument for measuring conductivity is an eddy current conductivity meter.
Preferably, the electrochemical activity of the aluminum anode material comprises a discharge current and a discharge voltage of the aluminum anode material in an alkaline solution.
Preferably, the aluminum anode material comprises a binary aluminum anode material, a ternary anode material and a quaternary aluminum anode material.
Preferably, the specific method for the aluminum anode material sample grinding treatment is as follows: and sequentially polishing the aluminum anode material by adopting metallographic abrasive paper of different models, wherein the used metallographic abrasive paper is thick to thin, and the model of the finally used metallographic abrasive paper is any one of 1800# -2500 #.
Preferably, when measuring the conductivity, the conductivity of the sample after the sample grinding treatment is measured at a plurality of different positions respectively, and finally the conductivity is averaged in different areas.
Compared with the prior art, the invention has the following advantages:
the method represents the discharge activity of the aluminum anode material through the conductivity, has the characteristics of rapidness, accuracy, easiness in operation, no damage and the like, is convenient for rapidly representing and screening the anode material of the aluminum air battery, and effectively overcomes the defects of large dosage, long time consumption and easiness in occurrence of experimental errors of conventional research means. The specific evaluation criterion is that the conductivity of the aluminum anode material is lower, which indicates that the higher the solid solution degree of the alloy element into the aluminum matrix, so that the higher the activation degree of the compact oxide film on the surface of the aluminum anode material, the higher the electrochemical activity (including discharge current and discharge voltage) of the corresponding aluminum anode material is.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to the method, a binary aluminum anode material (containing magnesium and zinc), a ternary aluminum anode material and a quaternary aluminum anode material are taken as examples respectively, the discharge activity of the materials is represented through a conductivity test, and the accuracy of the conductivity representation of the discharge activity (discharge current and discharge voltage) is verified through an aluminum-air battery test.
Example 1: preparing and smelting binary aluminum alloy anode materials with different magnesium contents, cutting a typical tissue, wherein the size of the typical tissue is about 40 multiplied by 60 multiplied by 5mm, sequentially polishing by adopting metallographic abrasive paper of different types, wherein the used metallographic abrasive paper is thick to thin, and the model of the finally adopted metallographic abrasive paper is 2000 #; then, the conductivity of the sample is measured at three different positions of the sample by using a corrected eddy current conductivity meter, and finally, the conductivity is averaged by three regions.
Verification example 1: the binary aluminum alloy anode material polished in the example 1 and an air cathode are assembled into a full cell, the electrolyte between the cathode and the anode is 4M NaOH solution, and a charge and discharge tester is used for measuring the electrolyte concentration at 80mA/cm2Discharging for 1h under the constant current condition, and recording the change curve of the discharge voltage along with the time.
The results of comparing example 1 and comparative example 1 are shown in table 1. Wherein CP Al represents industrial pure aluminum, the purity is about 99 percent, and the former figure of magnesium element represents mass fraction.
TABLE 1 comparative analysis of electrical conductivity and electrochemical activity for binary aluminum alloy anode materials of different magnesium contents
As can be seen from Table 1, as the content of magnesium increases, the corresponding conductivity decreases, indicating that the solid solubility of the magnesium alloy element in the aluminum matrix increases and the corresponding electrochemical activity increases (under constant current conditions, the corresponding discharge voltage increases); from the above analysis, the trend of the change in conductivity fully reflects the electrochemical activity of the aluminum anode material.
Example 2: preparing and smelting binary aluminum alloy anode materials with different zinc contents, cutting a typical tissue, wherein the size of the typical tissue is about 40 multiplied by 60 multiplied by 5mm, sequentially polishing by adopting metallographic abrasive paper of different types, wherein the used metallographic abrasive paper is thick to thin, and the model of the finally adopted metallographic abrasive paper is 2000 #; then, the conductivity of the sample is measured at three different positions of the sample by using a corrected eddy current conductivity meter, and finally, the conductivity is averaged by three regions.
Verification example 2: the binary aluminum alloy anode material polished in example 2 and an air cathode were assembled into a full cell, the electrolyte between the cathode and the anode was 4M NaOH solution, and the charge/discharge tester was used at 80mA/cm2Discharging for 1h under the constant current condition, and recording the change curve of the discharge voltage along with the time.
The results of comparing example 2 with those of comparative example 2 are shown in table 2. Wherein CP Al represents industrial pure aluminum, the purity is about 99 percent, and the former figure of zinc element represents mass fraction.
TABLE 2 comparative analysis of electrical conductivity and electrochemical activity corresponding to binary aluminum alloy anode materials of different zinc contents
As can be seen from table 2, as the content of zinc increases, the corresponding conductivity decreases, indicating that the solid solubility of the zinc alloy element in the aluminum matrix increases, and the corresponding electrochemical activity increases (under constant current conditions, the corresponding discharge voltage increases); from the above analysis, the trend of the change in conductivity fully reflects the electrochemical activity of the aluminum anode material.
Example 3: preparing and smelting binary aluminum alloy anode materials with different manganese contents, cutting a typical tissue, wherein the size of the typical tissue is about 40 multiplied by 60 multiplied by 5mm, sequentially polishing by adopting metallographic abrasive paper of different types, wherein the used metallographic abrasive paper is thick to thin, and the model of the finally adopted metallographic abrasive paper is 2000 #; then, the conductivity of the sample is measured at three different positions of the sample by using a corrected eddy current conductivity meter, and finally, the conductivity is averaged by three regions.
Verification example 3: the binary aluminum alloy anode material polished in example 3 and an air cathode were assembled into a full cell, the electrolyte between the cathode and the anode was 4M NaOH solution, and the charge/discharge tester was used at 100mA/cm2Discharging for 1h under the constant current condition, and recording the change curve of the discharge voltage along with the time.
The results of comparing example 3 with those of comparative example 3 are shown in Table 3. Wherein CP Al represents industrial pure aluminum, the purity is about 99 percent, and the number in front of manganese element represents the mass fraction.
TABLE 3 comparative analysis of conductivity and electrochemical activity for binary aluminum alloy anode materials of different manganese contents
As can be seen from table 3, as the content of manganese increases, the corresponding conductivity decreases, indicating that the solid solubility of the zinc alloy element in the aluminum matrix increases, and the corresponding electrochemical activity increases (under constant current conditions, the corresponding discharge voltage increases); from the above analysis, the trend of the change in conductivity fully reflects the electrochemical activity of the aluminum anode material.
Example 4: preparing a ternary aluminum alloy anode material for smelting different alloy elements, cutting a typical tissue, wherein the size of the typical tissue is about 40 multiplied by 60 multiplied by 5mm, sequentially polishing by using metallographic abrasive paper of different types, wherein the used metallographic abrasive paper is thick to thin, and the model of the finally used metallographic abrasive paper is 2000 #; then, the conductivity of the sample is measured at three different positions of the sample by using a corrected eddy current conductivity meter, and finally, the conductivity is averaged by three regions.
Verification example 4: the ternary aluminum alloy anode material polished in example 1 and an air cathode were assembled into a full cell, the electrolyte between the cathode and the anode was 4M NaOH solution, and the charge/discharge tester was used at 80mA/cm2Discharging for 1h under the constant current condition, and recording the change curve of the discharge voltage along with the time.
The results of comparing example 4 with those of comparative example 4 are shown in table 4. Wherein CP Al represents industrial pure aluminum, the purity is about 99 percent, and the number in front of the element represents the mass fraction.
Table 4 comparative analysis of the electrical conductivity and electrochemical activity of the ternary aluminum alloy anode material with different alloying elements.
As can be seen from Table 4, as the alloy element is added, the corresponding conductivity decreases, indicating that the solid solubility of the alloy element in the aluminum matrix increases and the corresponding electrochemical activity increases (under constant current conditions, the corresponding discharge voltage increases); from the above analysis, the trend of the change in conductivity fully reflects the electrochemical activity of the aluminum anode material.
Example 5: preparing a quaternary aluminum alloy anode material for smelting different alloy elements, cutting a typical tissue with the size of about 40 multiplied by 60 multiplied by 5mm, sequentially polishing by adopting metallographic abrasive paper with different models, wherein the used metallographic abrasive paper is thick to thin, and the model of the finally adopted metallographic abrasive paper is 2000 #; then, the conductivity of the sample is measured at three different positions of the sample by using a corrected eddy current conductivity meter, and finally, the conductivity is averaged by three regions.
Verification example 5: the quaternary aluminum alloy anode material polished in example 5 and an air cathode were assembled into a full cell, the electrolyte between the cathode and the anode was 4M NaOH solution, and the cell was discharged for 1 hour under a constant current of 80mA/cm2 using a charge and discharge tester, and the change curve of the discharge voltage with time was recorded.
The results of comparing example 5 with those of comparative example 5 are shown in Table 5. Wherein CP Al represents industrial pure aluminum, the purity is about 99 percent, and the number in front of the element represents the mass fraction.
TABLE 5 comparative analysis of electrical conductivity and electrochemical activity corresponding to quaternary aluminum alloy anode materials of different alloying elements
As can be seen from Table 5, as the alloy element is added, the corresponding conductivity decreases, indicating that the solid solubility of the alloy element in the aluminum matrix increases and the corresponding electrochemical activity increases (under constant current conditions, the corresponding discharge voltage increases); from the above analysis, the trend of the change in conductivity fully reflects the electrochemical activity of the aluminum anode material.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (2)
1. A conductivity characterization method for the electrochemical activity of an aluminum anode material is characterized in that the conductivity of the aluminum anode material to be characterized is measured after the aluminum anode material is subjected to sample grinding treatment; the value of the electrical conductivity is inversely proportional to the electrochemical activity of the aluminum anode material, including the discharge current and discharge voltage of the aluminum anode material in an alkaline solution;
the aluminum anode material comprises a binary aluminum anode material, a ternary anode material and a quaternary aluminum anode material;
the specific method for grinding the aluminum anode material comprises the following steps: sequentially polishing the aluminum anode material by adopting metallographic abrasive paper of different models, wherein the used metallographic abrasive paper is thick to thin, and the model of the finally used metallographic abrasive paper is any one of 1800# -2500 #;
when the conductivity is measured, the conductivity of a plurality of different parts of the sample after sample grinding treatment is respectively measured, and finally the average value of the conductivity in different areas is taken.
2. The method for conductivity characterization of aluminum anode material electrochemical activity according to claim 1, wherein the instrument for measuring conductivity is a vortex conductometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910185174.2A CN109781792B (en) | 2019-03-12 | 2019-03-12 | Method for representing electrochemical activity of aluminum anode material through conductivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910185174.2A CN109781792B (en) | 2019-03-12 | 2019-03-12 | Method for representing electrochemical activity of aluminum anode material through conductivity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109781792A CN109781792A (en) | 2019-05-21 |
| CN109781792B true CN109781792B (en) | 2022-05-31 |
Family
ID=66489046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910185174.2A Active CN109781792B (en) | 2019-03-12 | 2019-03-12 | Method for representing electrochemical activity of aluminum anode material through conductivity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109781792B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1776841A (en) * | 2005-08-11 | 2006-05-24 | 上海纳晶科技有限公司 | Composite nano carbon-base film electrode and use therefor |
| CN101148767A (en) * | 2007-10-29 | 2008-03-26 | 河南科技大学 | Aluminum-zinc-indium series sacrificial anode material |
| CN101808949A (en) * | 2007-07-24 | 2010-08-18 | 纳尔科公司 | Be used to produce and analyze the temperature and pressure redox-potential mark of hot-water system so that pre-method of inhibiting corrosion and equipment |
| CN105765767A (en) * | 2013-08-12 | 2016-07-13 | 瓦尔达微创新有限责任公司 | Active electrochemical material and production of same |
| CN108642327A (en) * | 2018-04-26 | 2018-10-12 | 广东省材料与加工研究所 | A kind of aluminium-air cell anode material and preparation method thereof |
| CN109085212A (en) * | 2018-08-03 | 2018-12-25 | 安徽工业大学 | A kind of quick characterization aluminium anodes material is anti-corrosion and the method for electro-chemical activity |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6992482B2 (en) * | 2000-11-08 | 2006-01-31 | Jentek Sensors, Inc. | Magnetic field sensor having a switchable drive current spatial distribution |
-
2019
- 2019-03-12 CN CN201910185174.2A patent/CN109781792B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1776841A (en) * | 2005-08-11 | 2006-05-24 | 上海纳晶科技有限公司 | Composite nano carbon-base film electrode and use therefor |
| CN101808949A (en) * | 2007-07-24 | 2010-08-18 | 纳尔科公司 | Be used to produce and analyze the temperature and pressure redox-potential mark of hot-water system so that pre-method of inhibiting corrosion and equipment |
| CN101148767A (en) * | 2007-10-29 | 2008-03-26 | 河南科技大学 | Aluminum-zinc-indium series sacrificial anode material |
| CN105765767A (en) * | 2013-08-12 | 2016-07-13 | 瓦尔达微创新有限责任公司 | Active electrochemical material and production of same |
| CN108642327A (en) * | 2018-04-26 | 2018-10-12 | 广东省材料与加工研究所 | A kind of aluminium-air cell anode material and preparation method thereof |
| CN109085212A (en) * | 2018-08-03 | 2018-12-25 | 安徽工业大学 | A kind of quick characterization aluminium anodes material is anti-corrosion and the method for electro-chemical activity |
Non-Patent Citations (1)
| Title |
|---|
| 不同酸对界面聚合法合成聚邻甲苯胺结构和性能的影响;阿孜古丽木尔赛力木;《内蒙古大学学报》;20100731;第41卷(第4期);384-389 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109781792A (en) | 2019-05-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Gao et al. | Multiscale observation of Li plating for lithium-ion batteries | |
| Burns et al. | The impact of varying the concentration of vinylene carbonate electrolyte additive in wound Li-ion cells | |
| CN106680726B (en) | Method for testing cycle performance of lithium ion battery | |
| CN111082173B (en) | Lithium ion battery rapid charging method based on lithium separation prevention | |
| KR101023352B1 (en) | Evaluation method and evaluation apparatus for evaluating battery safety | |
| Tanim et al. | A comprehensive understanding of the aging effects of extreme fast charging on high Ni NMC cathode | |
| CN107516750A (en) | A kind of method and device for determining lithium ion battery safe charging condition | |
| Mutlu et al. | Al-6013-T6 and Al-7075-T7351 alloy anodes for aluminium-air battery | |
| Sieg et al. | Fast-charging capability of lithium-ion cells: Influence of electrode aging and electrolyte consumption | |
| WO2012095913A1 (en) | Method for evaluating deterioration of lithium ion secondary cell, and cell pack | |
| CN102110839A (en) | Battery | |
| CN111175662A (en) | Lithium ion battery evaluation method and lithium ion battery detection system | |
| CN112557929B (en) | Battery internal resistance testing method, electronic equipment and storage medium | |
| Li et al. | Electrochemical Performance of MnO2‐based Air Cathodes for Zinc‐air Batteries | |
| CN110426643A (en) | Self-discharge screening method for square aluminum shell anode weak conductive cell | |
| CN108847472A (en) | A kind of method of determining lead-acid accumulator acid adding amount | |
| KR20170116539A (en) | Vertical resistance measurement device of lithium-sulfur battery and method for evaluating cathode of lithium-sulfur battery using the same | |
| CN108169681A (en) | Method for detecting corrosion of aluminum shell of lithium ion battery | |
| CN109781792B (en) | Method for representing electrochemical activity of aluminum anode material through conductivity | |
| CN116953526A (en) | Battery multiplying power discharge performance prediction method, device, equipment and storage medium | |
| Koop et al. | A guide to the influence of bismuth on lead/acid battery performance | |
| CN115015790A (en) | Method for rapidly judging chemical system of retired power lithium ion battery | |
| CN112179895B (en) | Method for detecting pre-lithium amount of pole piece | |
| CN112946490B (en) | FA analysis method for capacity attenuation of lithium ion battery core | |
| CN115986057A (en) | Method for reducing polarization effect of three-electrode battery detection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |