CN115714209B - Lead-acid storage battery repair liquid and preparation method and application thereof - Google Patents
Lead-acid storage battery repair liquid and preparation method and application thereof Download PDFInfo
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- CN115714209B CN115714209B CN202211524364.0A CN202211524364A CN115714209B CN 115714209 B CN115714209 B CN 115714209B CN 202211524364 A CN202211524364 A CN 202211524364A CN 115714209 B CN115714209 B CN 115714209B
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- 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
Abstract
The invention relates to a lead-acid storage battery repair liquid and a preparation method and application thereof, wherein the preparation method comprises the following steps: (1) Removing impurities from the nano graphene stock solution to obtain purified nano graphene stock solution; (2) Mixing the purified nano graphene stock solution obtained in the step (1) with an acid solution to obtain a lead-acid storage battery repairing solution, wherein the lead-acid storage battery repairing solution is obtained by the preparation method. The preparation method provided by the invention uses the nano graphene stock solution-acid solution as a main composition system, so that the preparation method is simple in components and convenient and quick to operate; the obtained lead-acid storage battery repairing liquid has excellent repairing effect on batteries, can also improve the battery efficiency and the battery capacity, improve the low-temperature performance of the batteries, and can be used in the fields of lead-acid power batteries or lead-acid energy storage batteries and the like.
Description
Technical Field
The invention relates to the technical field of storage battery repair, in particular to lead-acid storage battery repair liquid and a preparation method and application thereof.
Background
Since the advent of lead-acid batteries at the end of the 19 th century, the development has been rapid due to its low cost and excellent performance. However, since lead-acid batteries are discharged with a large current during use, their usable capacity is significantly reduced. Therefore, deep discharge of lead-acid batteries is often limited. However, in the case of limiting discharge, the electrochemical performance gradually declines even at 80% depth of discharge, with a typical cycle life of about 1500 times. Typical lead acid batteries have a life of 2-3 years, but practical service lives are much lower than expected, often only 1 year or less. To change this condition, some reasonable means is often employed to extend the life of the lead acid battery. The method for repairing the waste lead-acid storage battery is a low-cost and high-benefit method for prolonging the service life of the lead-acid storage battery.
At present, a lead-acid storage battery is usually repaired in the form of adding electrolyte, but the added electrolyte is adhered to the surface of an electrode, so that lead sulfate on the surface can be slightly cleaned, the lead sulfate cannot be thoroughly removed, and the lead sulfate can be adhered to a polar plate again after recrystallization, so that the battery is not really repaired, and the performance of the lead-acid storage battery is obviously reduced along with the prolonged service time.
In addition, lead-acid storage batteries are greatly influenced by ambient temperature, and particularly have poor charge and discharge performance at low temperature, and the existing repair technology cannot achieve the effects of recovering the battery capacity and improving the low-temperature performance.
CN103311586a discloses a repairing reducing agent for lead-acid storage batteries, which comprises the following components in percentage by mass: polyethylene glycol 0.5-2.0%; 0.5 to 5.0 percent of polyvinyl alcohol; 0.05-1.0% of 2,3, 6-trimethylphenol; 1.0-5.0% of 1, 2-propylene glycol; ammonium acetate 0.5-5.0%; 0.05-0.5% of graphene oxide; deionized water, and the balance. The repairing reducing agent has complex components and cannot remove lead sulfate, so that the repairing reducing agent has limited capacity improving effect on the storage battery.
CN103474707a discloses a lead-acid storage battery repairing liquid and a method for repairing a lead-acid storage battery by using the same, wherein the lead-acid storage battery repairing liquid comprises a catalytic complexing agent, a surfactant, a bulking agent, a sulfate additive and sodium p-toluenesulfonate. The method for repairing the lead-acid storage battery comprises the following steps: placing the storage battery into a container, injecting water to enable the water surface to be flush with a middle cover of the storage battery, adjusting the water temperature and charging the storage battery; vibrating the transverse and longitudinal frequency waves of the storage battery, and taking out the storage battery to be injected with the lead-acid storage battery repairing liquid; taking storage batteries with the open-circuit voltage difference less than 0.3V, connecting the storage batteries in series to form groups, charging the storage batteries with different currents for several times, discharging the storage batteries with the 2H rate, and charging the storage batteries with different currents for several times again; and discharging redundant lead-acid storage battery repairing liquid. Therefore, the disclosed repairing liquid and the repairing method are very complex, require repeated operation for many times, and are difficult to achieve good repairing effect.
Therefore, the lead-acid storage battery repair liquid and the preparation method and application thereof have important significance.
Disclosure of Invention
Compared with the prior art, the lead-acid storage battery repairing liquid provided by the invention has a good repairing effect, can rapidly repair the polar plate function, can be used in the fields of lead-acid power batteries or lead-acid energy storage batteries, and the like, is convenient and efficient, and can be applied on a large scale.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
in a first aspect, the invention provides a method for preparing a lead-acid storage battery repair liquid, which comprises the following steps:
(1) Removing impurities from the nano graphene stock solution to obtain purified nano graphene stock solution;
(2) And (3) mixing the purified nano graphene stock solution obtained in the step (1) with an acid solution to obtain the lead-acid storage battery repairing solution.
According to the invention, the nano graphene stock solution is subjected to impurity removal treatment to obtain the purified nano graphene stock solution, so that metal elements can be removed, and the degradation of battery performance caused by self-discharge of metal substances is avoided; and then directly mixing the purified nano graphene stock solution with an acid solution, wherein the acid solution can be used as a supplementary electrolyte, namely, the lead-acid storage battery repairing solution is obtained under the condition that other auxiliary additives are not added. The lead-acid storage battery repair liquid provided by the invention takes the nano graphene stock solution-acid solution as a main composition system, firstly, the repair liquid has a strong reduction effect, and the nano graphene contained in the repair liquid can be adsorbed on a polar plate of a battery to form a protective film, so that the obstruction of the lead sulfate film on the surface of the polar plate to electronic conduction is reduced, and the internal resistance of the battery is reduced; secondly, active functional groups such as hydroxyl and carboxyl attached to the nano graphene oxide can form a stable complex with lead ions, so that the function of the polar plate can be quickly recovered, and large lead sulfate crystals are decomposed to achieve the purpose of high-efficiency sulfur removal, thereby prolonging the service life of the battery; thirdly, the morphology of the lead sulfate crystal can be reconstructed, the crystallinity of the lead sulfate is reduced, the lead sulfate crystal is more easily converted into lead in a low-temperature environment, and the low-temperature performance of the battery is improved. Therefore, compared with the existing repairing liquid, the repairing liquid for the lead-acid storage battery provided by the invention has the advantages of simple composition, stronger repairing capability and capability of further improving the low-temperature electrical property of the storage battery.
Preferably, the nano graphene stock solution in the step (1) is prepared by an electrochemical method.
Preferably, the particle size of the nano graphene in the nano graphene stock solution is 5-100nm, for example, 5nm, 10nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm or 100nm, but not limited to the recited values, and other non-recited values in the numerical range are equally applicable.
According to the invention, the particle size of the nano graphene in the nano graphene stock solution is preferably controlled within a specific range, so that the sulfuration of the polar plate can be slowed down, the uniform distribution of active sites can be enhanced, and the capacity of the battery can be increased in one step.
Preferably, the mass concentration of the solid graphene oxide fragments in the nano graphene stock solution is 3-5%o, for example, 3%o, 3.2%o, 3.4%o, 3.6%o, 3.8%o, 4%o, 4.2%o, 4.6%o, 4.8%o or 5%o, but not limited to the recited values, and other non-recited values in the numerical range are equally applicable.
In the invention, the solid graphene oxide fragments are nano graphene.
Preferably, the pH of the nano graphene stock solution in the step (1) is 1.5-3.5, for example, it may be 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4 or 3.5, but not limited to the listed values, and other non-listed values in the numerical range are equally applicable.
The pH of the nano graphene stock solution is preferably controlled within a specific range, and the composition of each active group in the stock solution is prepared, so that the solubility of the nano graphene stock solution and water is enhanced, and the capacity of a battery is further improved.
Preferably, the conductivity of the nano graphene stock solution is 1.1-2ms/cm, for example, 1.1ms/cm, 1.2ms/cm, 1.3ms/cm, 1.4ms/cm, 1.5ms/cm, 1.6ms/cm, 1.7ms/cm, 1.8ms/cm, 1.9ms/cm or 2ms/cm, but not limited to the recited values, and other non-recited values in the numerical range are equally applicable.
The invention preferably controls the conductivity of the nano graphene stock solution in a specific range, and can modulate the composition of each active group in the stock solution, so that the solubility of the nano graphene stock solution with water is enhanced, and the capacity of the battery is further improved.
Preferably, the redox potential of the nano graphene stock solution is 200-350mV, for example, 200mV, 210mV, 220mV, 230mV, 240mV, 250mV, 260mV, 270mV, 280mV, 290mV, 300mV, 310mV, 320mV, 330mV, 340mV or 350mV, but not limited to the recited values, and other non-recited values within the range of values are equally applicable.
The oxidation-reduction potential of the nano graphene stock solution is preferably controlled within a specific range, and the composition of each active group in the stock solution can be modulated, so that the solubility of the nano graphene stock solution and water is enhanced, and the capacity of a battery is further improved.
Preferably, the impurity removal treatment in step (1) includes: and removing metal elements in the nano graphene stock solution.
Preferably, the metallic element comprises any one or a combination of at least two of iron, copper, chromium, cadmium or nickel, wherein typical but non-limiting combinations include combinations of iron and copper or combinations of iron, copper, chromium and cadmium.
Preferably, the metallic element exists in a form including a metal ion and/or a metal oxide.
Preferably, the impurity removal treatment mode comprises magnetic attraction or complexing agent adsorption.
Preferably, the magnetic flux of the magnetic attraction is 0.5-5T, for example, 0.5T, 1T, 1.5T, 2T, 2.5T, 3T, 3.5T, 4T, 4.5T or 5T, but not limited to the recited values, and other non-recited values within the range of values are equally applicable.
Preferably, the complexing agent comprises ethylenediamine tetraacetic acid or sodium ethylenediamine tetraacetate.
In the present invention, ethylene diamine tetraacetic acid or disodium ethylene diamine tetraacetic acid is generally used in a concentration of 0.1mol/L.
Preferably, the mass concentration of the metal element in the purified nano graphene stock solution in the step (1) is less than or equal to 10ppm, for example, 10ppm, 9ppm, 8ppm, 7ppm, 6ppm, 5ppm, 4ppm, 3ppm, 2ppm or 1ppm, but is not limited to the recited values, and other values not recited in the numerical range are equally applicable.
Preferably, in the mixing in the step (2), the mass ratio of the purified nano graphene stock solution to the acid solution is 1 (10-1000), for example, 1:10, 1:20, 1:40, 1:60, 1:80, 1:100, 1:200, 1:300, 1:400, 1:500, 1:600, 1:700, 1:800, 1:900 or 1:1000, but not limited to the recited values, and other non-recited values in the range of values are equally applicable.
Preferably, the acid solution comprises a sulfuric acid solution.
Preferably, the sulfuric acid solution is formulated from concentrated sulfuric acid and water.
Preferably, the mass of the concentrated sulfuric acid is 30-50% of the mass of the sulfuric acid solution, for example, 35%, 37.4%, 40%, 42%, 45%, 48% or 50%, but not limited to the recited values, and other non-recited values within the range of values are equally applicable.
Preferably, sodium sulfate is also added to the acid solution.
Preferably, the sodium sulfate in the acid solution is 1-5% by mass, for example, 1%, 2%, 3%, 4% or 5%, but not limited to the recited values, and other non-recited values within the range of values are equally applicable.
As a preferred technical solution of the first aspect of the present invention, the preparation method includes the following steps:
(1) Removing impurities from the nano graphene stock solution to obtain purified nano graphene stock solution, wherein the mass concentration of metal elements in the purified nano graphene stock solution is less than or equal to 10ppm;
the particle size of the nano graphene in the nano graphene stock solution is 5-100nm, the mass concentration of the solid graphene oxide fragments in the nano graphene stock solution is 3-5 per mill, the pH of the nano graphene stock solution is 1.5-3.5, the conductivity of the nano graphene stock solution is 1.1-2ms/cm, and the oxidation-reduction potential of the nano graphene stock solution is 200-350mV;
the impurity removal treatment comprises the following steps: removing metal elements in the nano graphene stock solution by adopting magnetic attraction or complexing agent adsorption, wherein the metal elements comprise any one or a combination of at least two of iron, copper, chromium, cadmium and nickel, the existence form of the metal elements comprises metal ions and/or metal oxides, the magnetic flux of the magnetic attraction is 0.5-5T, and the complexing agent comprises ethylenediamine tetraacetic acid or ethylenediamine tetraacetic acid sodium;
(2) Mixing the purified nano graphene stock solution obtained in the step (1) with an acid solution according to the mass ratio of 1 (10-1000) to obtain a lead-acid storage battery repairing solution;
the acid solution comprises sulfuric acid solution, wherein the sulfuric acid solution is prepared from concentrated sulfuric acid and water, the mass of the concentrated sulfuric acid accounts for 30-50% of the mass of the sulfuric acid solution, sodium sulfate is also added into the acid solution, and the mass percentage of the sodium sulfate in the acid solution is 1-5%.
In a second aspect, the invention provides a lead-acid storage battery repairing liquid, which is obtained by adopting the preparation method of the lead-acid storage battery repairing liquid in the first aspect.
The lead-acid storage battery repair liquid provided by the invention can effectively prolong the service life of the lead-acid storage battery, reduce the internal resistance ratio, improve the battery efficiency and the battery capacity, improve the low-temperature performance of the battery, and has the characteristics of safety, effectiveness and convenience, and can be applied on a large scale.
In a third aspect, the present invention provides the use of a lead-acid battery repair liquid according to the second aspect for a lead-acid power battery or a lead-acid energy storage battery.
The lead-acid storage battery repair liquid provided by the invention is used for lead-acid power batteries or lead-acid energy storage batteries, is convenient and efficient, can improve the capacity, the battery efficiency and the low-temperature performance of the batteries, and has the advantages of mature technology, reasonable design and remarkable effect.
Preferably, the lead-acid type power battery comprises an electric vehicle battery.
Preferably, the lead-acid type energy storage battery comprises a UPS emergency power supply.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the preparation method provided by the invention, the nano graphene stock solution-acid solution is adopted as a main composition system, so that a protective film can be formed on a polar plate of the battery, and the internal resistance of the battery is reduced; the lead sulfate crystal can be decomposed to achieve the purpose of high-efficiency sulfur removal, and the service life of the battery is prolonged; the crystallinity of the lead sulfate can be reduced, and the low-temperature performance of the battery can be improved.
(2) The lead-acid storage battery repair liquid provided by the invention has excellent repair effect on the battery, can improve the battery efficiency and the battery capacity, improve the low-temperature performance of the battery, can enable the battery capacity lifting rate to reach more than 30%, can reach more than 33% under the preferred condition, and enable the low-temperature discharge rate to reach more than 41%, and can reach more than 42% under the preferred condition.
(3) The lead-acid storage battery repairing liquid provided by the invention has the characteristics of safety, effectiveness and convenience, can be applied on a large scale, and is especially suitable for the fields of lead-acid power batteries or lead-acid energy storage batteries and the like.
Detailed Description
The technical scheme of the invention is further described by the following specific embodiments. It will be apparent to those skilled in the art that the examples are merely to aid in understanding the invention and are not to be construed as a specific limitation thereof.
Example 1
The embodiment provides a preparation method of a lead-acid storage battery repair liquid, which comprises the following steps:
(1) The preparation method comprises the steps of taking a high-purity (purity is 99.99%) graphite plate as an anode, taking a platinum electrode as a cathode, and switching on direct current to prepare (the preparation method is an electrolysis method, the voltage is DC30V, the constant voltage is firstly constant, then the constant current is controlled to be 2A, the time is 16 h), the particle size of nano graphene in the obtained nano graphene stock solution is 10-20nm, the mass concentration of solid graphene oxide fragments in the nano graphene stock solution is 4.2 per mill, the pH value of the nano graphene stock solution is 2.5, the conductivity of the nano graphene stock solution is 1.7ms/cm, and the oxidation-reduction potential of the nano graphene stock solution is 300mV;
the nano graphene stock solution is subjected to impurity removal treatment through a circulating pump and a high-flux magnet (the magnetic flux is 1.2T) for 6 hours, so that purified nano graphene stock solution is obtained, and the mass concentration of metal elements in the purified nano graphene stock solution is 8ppm; the metal element comprises iron and copper;
(2) Mixing the purified nano graphene stock solution and the acid solution obtained in the step (1) according to the mass ratio of 3:100 to obtain a lead-acid storage battery repairing solution;
the acid solution is sulfuric acid solution, and is prepared from concentrated sulfuric acid and water, wherein the mass percentage of the concentrated sulfuric acid in the sulfuric acid solution is 37.4%.
The embodiment provides a lead-acid storage battery repairing liquid, and the lead-acid storage battery repairing liquid is prepared by the preparation method.
Example 2
The embodiment provides a preparation method of a lead-acid storage battery repair liquid, which comprises the following steps:
(1) Taking a high-purity (purity is 99.99%) graphite plate as an anode, taking a platinum electrode as a cathode, and switching on direct current for preparation (the preparation method is an electrolysis method, the voltage is DC30V, the constant voltage is firstly constant, then the constant current is controlled to be 2A, and the time is 8 h) to obtain a nano graphene stock solution, wherein the particle size of nano graphene in the obtained nano graphene stock solution is 30-50nm, the mass concentration of solid graphene oxide fragments in the nano graphene stock solution is 3.6 per mill, the pH value of the nano graphene stock solution is 3.1, the conductivity of the nano graphene stock solution is 1.5ms/cm, and the oxidation-reduction potential of the nano graphene stock solution is 240mV;
the nano graphene stock solution is circulated through a high flux magnet (the magnetic flux is 1.2T) for 10 hours through a circulating pump to perform impurity removal treatment, so that purified nano graphene stock solution is obtained, and the mass concentration of metal elements in the purified nano graphene stock solution is 5ppm; the metal element comprises iron and copper;
(2) Mixing the purified nano graphene stock solution and the acid solution obtained in the step (1) according to the mass ratio of 3:100 to obtain a lead-acid storage battery repairing solution;
the acid solution is sulfuric acid solution, and is prepared from concentrated sulfuric acid and water, wherein the mass percentage of the concentrated sulfuric acid in the sulfuric acid solution is 37.4%.
The embodiment provides a lead-acid storage battery repairing liquid, and the lead-acid storage battery repairing liquid is prepared by the preparation method.
Example 3
The embodiment provides a preparation method of a lead-acid storage battery repair liquid, which comprises the following steps:
(1) Taking a high-purity (purity is 99.99%) graphite plate as an anode, taking a platinum electrode as a cathode, and switching on direct current for preparation (the preparation method is an electrolysis method, the voltage is DC30V, the constant voltage is firstly constant, the current is controlled to be 2A, the time is 4 h) to obtain a nano graphene stock solution, the particle size of nano graphene in the obtained nano graphene stock solution is 80-100nm, the mass concentration of solid graphene oxide fragments in the nano graphene stock solution is 3.1 per mill, the pH value of the nano graphene stock solution is 3.5, the conductivity of the nano graphene stock solution is 1.4ms/cm, and the oxidation-reduction potential of the nano graphene stock solution is 200mV;
mixing the nano graphene stock solution with EDTA solution (the EDTA concentration is 0.1 mol/L) to perform impurity removal treatment to obtain purified nano graphene stock solution, wherein the mass concentration of metal elements in the purified nano graphene stock solution is 6ppm; the metal element comprises iron and copper;
(2) Mixing the purified nano graphene stock solution and the acid solution obtained in the step (1) according to the mass ratio of 3:100 to obtain a lead-acid storage battery repairing solution;
the acid solution is sulfuric acid solution, and is prepared from concentrated sulfuric acid and water, wherein the mass percentage of the concentrated sulfuric acid in the sulfuric acid solution is 37.4%.
The embodiment provides a lead-acid storage battery repairing liquid, and the lead-acid storage battery repairing liquid is prepared by the preparation method.
Example 4
The difference between the preparation method of the lead-acid storage battery repair liquid and the preparation method of the lead-acid storage battery repair liquid in the embodiment 1 is that the pH value of the nano graphene stock solution in the step 1 is 1.3, so that the particle size of nano graphene in the obtained nano graphene stock solution is 30-40nm, the conductivity of the nano graphene stock solution is 0.9ms/cm, and the oxidation-reduction potential of the nano graphene stock solution is 120mV.
Example 5
The difference between the preparation method of the lead-acid storage battery repair liquid and the preparation method of the lead-acid storage battery repair liquid in the embodiment 1 is that the pH value of the nano graphene stock solution in the step (1) is 4, so that the particle size of nano graphene in the obtained nano graphene stock solution is 200-300nm, the conductivity of the nano graphene stock solution is 1.0ms/cm, and the oxidation-reduction potential of the nano graphene stock solution is 170mV.
Comparative example 1
This comparative example provides a lead acid battery repair reducing agent that employs the lead acid battery repair reducing agent of example 3 in CN103311586 a.
And repairing the lead-acid storage battery by adopting the lead-acid storage battery repairing liquid prepared in the examples 1-5 and the lead-acid storage battery repairing reducing agent in the comparative example 1 to obtain the repaired lead-acid storage battery.
Performing capacity test on the repaired lead-acid storage battery to obtain the capacity improvement rate of the battery, wherein the calculation method comprises the following steps: the rate of increase in battery capacity= (capacity of lead storage battery after repair-actual capacity)/actual capacity×100%, and the measurement conditions are: the test was carried out at 25℃with the use of an old battery of 48V, a rated capacity of 20Ah and a practical capacity of generally 14 to 16Ah, and the results are shown in Table 1.
After the capacity test is completed, the low-temperature discharge rate of the repaired lead-acid storage battery is measured, and the measurement conditions are as follows: the discharge rate was measured at 25℃under zero and 0.1℃and the results are shown in Table 1.
TABLE 1
From table 1, the following points can be seen:
(1) From the data of examples 1-5, it can be seen that the preparation method provided by the invention can increase the battery capacity by more than 30% and the low-temperature discharge rate by more than 41%.
(2) As can be seen from the data of comparative examples 1 and 4-5, the pH of the nano graphene stock solution in example 1 is 2.5, the properties of particle size, conductivity, redox potential and the like of the nano graphene related to pH in examples 4-5 are also changed along with the pH of the nano graphene stock solution in example 1, and the battery capacity improvement rate and low-temperature discharge rate in example 1 are obviously higher than those in examples 4-5, so that the invention is capable of improving the battery capacity improvement effect and the battery low-temperature electric performance improvement effect of the lead-acid storage battery repair solution by preferably controlling the properties of the nano graphene stock solution, the particle size, the conductivity, the redox potential and the like.
(3) As can be seen from the data of comparative example 1 and comparative example 1, the battery capacity improvement rate and the low-temperature discharge rate in example 1 are significantly higher than those in comparative example 1, thus indicating that the preparation method of the lead-acid battery repair liquid and the lead-acid battery repair liquid provided by the invention can improve the battery efficiency and the battery capacity and improve the low-temperature performance of the battery.
In conclusion, the preparation method of the lead-acid storage battery repair liquid provided by the invention can prolong the service life of the battery, improve the low-temperature performance of the battery and increase the battery capacity.
The applicant declares that the above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be apparent to those skilled in the art that any changes or substitutions that are easily conceivable within the technical scope of the present invention disclosed by the present invention fall within the scope of the present invention and the disclosure.
Claims (13)
1. The preparation method of the lead-acid storage battery repair liquid is characterized by comprising the following steps of:
(1) Removing impurities from the nano graphene stock solution to obtain purified nano graphene stock solution;
the solvent in the nano graphene stock solution is water and no other auxiliary additive is added;
the mass concentration of metal elements in the purified nano graphene stock solution is less than or equal to 10ppm;
(2) Mixing the purified nano graphene stock solution obtained in the step (1) with sulfuric acid solution to obtain a lead-acid storage battery repairing solution;
the nano graphene stock solution is prepared by an electrochemical method;
the particle size of the nano graphene in the nano graphene stock solution is 5-100nm;
the nano graphene is a solid graphene oxide segment;
the mass concentration of the solid graphene oxide fragments in the nano graphene stock solution is 3-5 per mill;
the pH value of the nano graphene stock solution is 1.5-3.5;
the conductivity of the nano graphene stock solution is 1.1-2ms/cm;
the oxidation-reduction potential of the nano graphene stock solution is 200-350mV;
in the mixing, the mass ratio of the purified nano graphene stock solution to the sulfuric acid solution is 1 (10-1000);
the sulfuric acid solution is prepared from concentrated sulfuric acid and water;
the mass of the concentrated sulfuric acid accounts for 30-50% of the mass of the sulfuric acid solution.
2. The method of claim 1, wherein the impurity removal treatment of step (1) comprises: and removing metal elements in the nano graphene stock solution.
3. The production method according to claim 2, wherein the metal element includes any one or a combination of at least two of iron, copper, chromium, cadmium, and nickel.
4. The production method according to claim 2, wherein the metal element exists in a form including a metal ion and/or a metal oxide.
5. The method of claim 1, wherein the impurity removal treatment comprises magnetic attraction or complexing agent adsorption.
6. The method according to claim 5, wherein the magnetic flux of the magnetic attraction is 0.5 to 5T.
7. The method of claim 5, wherein the complexing agent comprises ethylenediamine tetraacetic acid or sodium ethylenediamine tetraacetate.
8. The method according to claim 1, wherein sodium sulfate is further added to the sulfuric acid solution.
9. The preparation method according to claim 8, wherein the sodium sulfate in the sulfuric acid solution is 1-5% by mass.
10. A lead-acid battery repair liquid, characterized in that the lead-acid battery repair liquid is obtained by adopting the preparation method of the lead-acid battery repair liquid according to any one of claims 1 to 9.
11. Use of the lead-acid battery repair liquid according to claim 10, wherein the lead-acid battery repair liquid is used for lead-acid power batteries or lead-acid energy storage batteries.
12. The use of claim 11, wherein the lead-acid based power battery comprises an electric vehicle battery.
13. The use of claim 11, wherein the lead-acid based energy storage battery comprises a UPS emergency power source.
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| CN103311586A (en) * | 2013-05-16 | 2013-09-18 | 吉林泰格节能产品科技开发有限公司 | Repairing reducing agent for lead-acid storage batteries |
| US20200266498A1 (en) * | 2019-02-19 | 2020-08-20 | Neweem Ltd. Co. | Lead-acid battery restoration agents containing graphene materials |
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