Alkali-activated rechargeable battery and device thereof

Abstract

The application discloses an alkali-activated rechargeable battery and a device thereof. The alkali-activated rechargeable battery comprises a solidified electrolyte, a positive electrode and a negative electrode. The solidified electrolyte is made of an alkali-activated electrolyte through reverse molding and solidification. The alkali-activated electrolyte comprises 70-90 parts of fly ash, 10-30 parts of mineral powder, 80-100 parts of sand, 48-52 parts of a sodium-based alkali activator and 7-10 parts of an ionic additive. The alkali-activated rechargeable battery device comprises a photovoltaic power generation system, the alkali-activated rechargeable battery and an anode. The alkali-activated rechargeable battery has low resistivity and high mechanical strength, can be used as a basic base of the photovoltaic power generation system and has the dual functions of a load-bearing component and an energy storage unit. The alkali-activated rechargeable battery device does not need an external independent power supply device, reduces carbon emission and is beneficial to energy saving and emission reduction.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of secondary batteries and building and energy storage materials, and particularly relates to an alkali-activated charging battery and a device thereof for reinforcing bar cathode protection. BACKGROUND

[0002] Steel bar corrosion in concrete is considered as one of the main factors leading to the deterioration of reinforced concrete structures. Generally, the alkaline environment of concrete can passivate the surface of the steel bar to form a passivation film. However, once the aggressive ions contaminate the concrete and reach the surface of the steel bar, especially the presence of chloride ions, the passivation film of the steel bar will be destroyed, corrosion will occur, and the concrete will crack or fall off. Reinforced concrete applied to various foundations, ports, cross-sea bridges, water pipelines and the like is prone to steel bar corrosion problems. Therefore, how to prevent steel bar corrosion and prolong the service life of reinforced concrete structures is a problem of concern in the engineering field.

[0003] Cathodic protection method is considered as the most effective and economical corrosion prevention method, and its principle is to lower the point of reinforced concrete to a negative value greater than the natural corrosion point, including impressed current cathodic protection method and sacrificial anode cathodic protection method. Among them, the impressed current cathodic protection method needs to provide a stable power supply externally for a long time, can solve the serious corrosion problem of large structures and long service life, can be used in high-resistance environment, and the current size can be controlled. However, this method has a complex construction process, requires installation personnel with rich experience, has a high cost, and the external power supply and monitoring system are easy to be damaged and corroded by the atmosphere. Obviously, the traditional impressed current cathodic protection method has obvious problems such as limited applicability, and needs to be improved. SUMMARY

[0004] In view of the above technical problems, the purpose of the present application is to provide an alkali activator, an alkali-activated charging battery and a device thereof.

[0005] The technical solutions provided by the present application are as follows:

[0006] In a first aspect, an alkali-activated charging battery is provided, comprising a solidified electrolyte, a positive electrode and a negative electrode;

[0007] The solidified electrolyte is made of alkali-activated electrolyte by reverse molding and solidification; the alkali-activated electrolyte comprises the following components in parts by mass: fly ash 70-90 parts, mineral powder 10-30 parts, sand 80-100 parts, sodium-based alkali activator 48-52 parts and ion additive 7-10 parts;

[0008] The positive electrode is a nickel-plated carbon fiber mesh;

[0009] The negative electrode is an iron-plated carbon fiber mesh;

[0010] The positive electrode and the negative electrode are embedded in the alkali-activated electrolyte before solidification.

[0011] In a possible implementation, the alkali-activated electrolyte comprises the following components in parts by mass: fly ash 80-90 parts, slag 10-20 parts, sand 90-100 parts, sodium-based alkali activator 50-52 parts, and ionic additive 7-10 parts.

[0012] In a possible implementation, the slag comprises blast furnace slag.

[0013] Further, the slag comprises one or a mixture of several of S75, S95, and S105 grade granulated blast furnace slag.

[0014] In a possible implementation, the sodium-based alkali activator comprises the following components in parts by mass: 3-4 parts of sodium hydroxide particles, 34-38 parts of sodium silicate aqueous solution, and 11-13 parts of deionized water.

[0015] In a possible implementation, the ionic additive comprises a polyethylene oxide solution and a polyvinyl alcohol solution.

[0016] Further, the polyethylene oxide solution has a concentration of 0.5wt%-1.0wt%, the polyvinyl alcohol solution has a concentration of 20wt%-30wt%, and the mass ratio of the polyethylene oxide solution to the polyvinyl alcohol solution is 2:1 or 1:2.

[0017] In a possible implementation, the method for preparing the solidified electrolyte comprises:

[0018] The fly ash and the slag are poured into a stirrer and stirred, and the sodium-based alkali activator is added and stirred to form a uniform slurry;

[0019] The ionic additive is added and stirred, and the standard sand is added and stirred to form the alkali-activated electrolyte;

[0020] The alkali-activated electrolyte is poured into a mold, and after solidification, the mold is removed to form the solidified electrolyte.

[0021] In a possible implementation, the nickel-plated carbon fiber mesh is formed by immersing the carbon fiber mesh in a nickel electroplating solution and electroplating; and the iron-plated carbon fiber mesh is formed by immersing the carbon fiber mesh in an iron electroplating solution and electroplating.

[0022] In a second aspect, an alkali-activated charging battery device for steel reinforcement cathodic protection is provided, comprising:

[0023] A photovoltaic power generation system for converting solar energy into electrical energy;

[0024] The alkali-activated charging battery of the first aspect is connected to the photovoltaic power generation system and serves as a base thereof; and the negative electrode of the alkali-activated charging battery is connected to the steel reinforcement in the concrete.

[0025] Anode, connected to the positive pole of the alkali-activated rechargeable battery.

[0026] In a possible implementation, the alkali-activated rechargeable battery device further comprises:

[0027] Reference electrode, connected to the anode;

[0028] Monitoring system, connected to the positive pole of the alkali-activated rechargeable battery, for monitoring electromotive force.

[0029] Compared with the prior art, the present application has the following beneficial effects:

[0030] 1、The positive pole and the negative pole of the alkali-activated rechargeable battery can be in close contact with the alkali-activated electrolyte, and the compatibility of the materials inside the battery is good.

[0031] 2、The electrolyte of the alkali-activated rechargeable battery is a solid electrolyte, and there are complex interconnected pores in the electrolyte, which are filled with an aqueous solution containing a large number of free-moving ions, so that the electrolyte has high ion conductivity, avoiding the risk of damage to the traditional battery shell and electrolyte leakage, and having high safety performance.

[0032] 3、The alkali-activated rechargeable battery has high mechanical strength, can play a dual function of load-bearing member and energy storage unit, saves the metal material for the shell of the traditional battery, and eliminates the additional space requirement for the independent power supply system. The alkali-activated rechargeable battery not only serves as an energy storage unit, but also can be used as a basic base of a photovoltaic power generation system to realize the integrated design of solar energy collection, conversion and storage. When the alkali-activated rechargeable battery reaches the end of its service life, it can be directly used as a load-bearing structure or crushed for use as a building filler, with low recycling cost and green environmental protection.

[0033] 4、The alkali-activated rechargeable battery has inherent compatibility, consistent durability and the same service life with the reinforced concrete structure due to its cement-based characteristics, greatly improving reliability, and without the need for additional regular maintenance of the battery.

[0034] 5、The alkali-activated rechargeable battery device for reinforced cathodic protection uses a photovoltaic power generation system to charge the alkali-activated rechargeable battery, stores and utilizes renewable energy, and the stored electric energy not only can provide cathodic protection for the reinforced concrete member, but also can power the monitoring device of the member, without the need for external independent power supply equipment, reducing carbon emissions and being conducive to energy saving and emission reduction. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 A schematic diagram of the alkali-activated rechargeable battery is constructed;

[0036] Figure 2 A schematic diagram of a cathode protection structure for an alkali-activated rechargeable battery. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments.

[0038] Reference Figure 1 The alkali-activated rechargeable battery comprises a solidified electrolyte, a positive electrode and a negative electrode.

[0039] The solidified electrolyte is made of an alkali-activated electrolyte through reverse molding and solidification; the alkali-activated electrolyte comprises the following components in mass parts: fly ash 70-90 parts, mineral powder 10-30 parts, sand 80-100 parts, sodium-based alkali activator 48-52 parts and ionic additive 7-10 parts.

[0040] The positive electrode is a nickel-plated carbon fiber mesh.

[0041] The negative electrode is an iron-plated carbon fiber mesh.

[0042] The positive electrode and the negative electrode are embedded in the alkali-activated electrolyte before the alkali-activated electrolyte is solidified.

[0043] In a possible implementation, the alkali-activated electrolyte comprises the following components in mass parts: fly ash 80-90 parts, mineral powder 10-20 parts, sand 90-100 parts, sodium-based alkali activator 50-52 parts and ionic additive 7-10 parts.

[0044] In a possible implementation, the mineral powder comprises blast furnace mineral powder.

[0045] Further, the mineral powder comprises one or a mixture of several of S75, S95 and S105 grade granulated blast furnace mineral powder.

[0046] In a possible implementation, the sodium-based alkali activator comprises the following components in mass parts: 3-4 parts of sodium hydroxide particles, 34-38 parts of sodium silicate aqueous solution and 11-13 parts of deionized water.

[0047] In a possible implementation, the ionic additive comprises polyethylene oxide solution and polyvinyl alcohol solution.

[0048] Further, the concentration of the polyethylene oxide solution is 0.5wt%-1.0wt%, the concentration of the polyvinyl alcohol solution is 20wt%-30wt%, and the mass ratio of the polyethylene oxide solution to the polyvinyl alcohol solution is 2:1 or 1:2.

[0049] In one possible implementation, the method for preparing the solidified electrolyte includes:

[0050] Pour fly ash and mineral powder into a mixer and stir. Add sodium-based activator and stir to form a uniform slurry.

[0051] Add ionic additives and stir, then add standard sand and stir to form an alkaline-activated electrolyte;

[0052] The alkali-activated electrolyte is poured into a mold, cured, and then demolded to form a solidified electrolyte.

[0053] In one possible implementation, the nickel-plated carbon fiber mesh is formed by immersing the carbon fiber mesh in a nickel electroplating solution and then electroplating it; the iron-plated carbon fiber mesh is formed by immersing the carbon fiber mesh in an iron electroplating solution and then electroplating it.

[0054] See Figure 2 Based on the aforementioned alkaline-activated rechargeable battery, an alkaline-activated rechargeable battery device for cathodic protection of reinforcing bars is provided, comprising:

[0055] Photovoltaic power generation systems are used to convert solar energy into electrical energy;

[0056] An alkaline-excited rechargeable battery is connected to a photovoltaic power generation system and serves as its base; the negative terminal of the alkaline-excited rechargeable battery is connected to steel bars in concrete.

[0057] The anode is connected to the positive terminal of the alkaline-activated rechargeable battery.

[0058] In one possible implementation, the alkaline-activated rechargeable battery device further includes:

[0059] The reference electrode is connected to the anode;

[0060] A monitoring system, connected to the positive terminal of an alkaline-excited rechargeable battery, is used to monitor the electromotive force.

[0061] Understandably, alkali activation utilizes an alkaline solution to activate solid aluminosilicate powder (slag, fly ash) to form a green and environmentally friendly material. Due to its lower CO2 emissions, it is considered a substitute for traditional cement. During the alkali activation reaction, many free ions are generated, such as Na+. + These ions achieve conductivity through directional movement under the influence of an applied electric field, so alkali-activated materials have an advantage over traditional cement in terms of ionic conductivity.

[0062] The alkali-activated material has low resistivity due to its high ion concentration environment and unique microstructure. The main product of the alkali-activated material is N-A-S-H gel, which has a three-dimensional cavity skeleton structure formed by connecting silicon-oxygen tetrahedron and aluminum-oxygen tetrahedron through bridge oxygen, and alkali metal cations (sodium ions) occupy the voids in the skeleton and can move freely, resulting in a high ion concentration in the solution. The ion additive according to the application is composed of polyethylene oxide solution and polyvinyl alcohol solution. After being added to the alkali-activated material, the crystal structure of the polymer is destroyed by the alkaline solution to form an amorphous state. Under the action of an external electric field (electric path state), the polymer chain segments in the amorphous region can repeatedly complex and dissociate with sodium ions, promoting the migration of sodium ions and realizing high ion conductivity. The reason for using the two polymer solutions is that the two polymer solutions have good compatibility with the alkali-activated material. The sodium ions of the alkali-activated material are only attached to the aluminosilicate molecules to balance the charge, and are not chemically bonded, but physically adsorbed on the surface structure. The movement of the amorphous region chain segments in the polymer can promote the dissociation of sodium ions from the aluminosilicate network, and then promote the migration of sodium ions on the molecular chain, thereby increasing the conductivity of the alkali-activated material. At the same time, the polymer particles in the alkali-activated material play a filling effect, improving the strength of the material. Therefore, the alkali-activated rechargeable battery according to the application can greatly improve the ion conductivity while ensuring high mechanical properties.

[0063] The application will be further described below in conjunction with specific examples.

[0064] In the following examples, the parts are all mass parts. The mineral powder is S95 grade granulated blast furnace mineral powder. The relative molecular mass of the polyethylene oxide is 8x10 6 The polymerization degree of the polyvinyl alcohol is 500, and the hydrolysis degree is 88%.

[0065] Example 1

[0066] Preparation method of the alkali-activated rechargeable battery:

[0067] (1) Mix NiSO4·7H2O, NiCl2·6H2O and H3BO3 with deionized water to form solutions, respectively, with concentrations of 200 g / L, 15 g / L and 20 g / L, respectively. Then mix the three solutions to form a nickel electroplating solution. Insert the carbon fiber mesh and nickel plate into the nickel electroplating solution. The carbon fiber mesh is connected to the negative electrode of the direct current power supply as the cathode, and the nickel plate is connected to the positive electrode of the direct current power supply as the anode. Pass a current of 1.0 A for 4 hours to prepare a nickel plated carbon fiber mesh as the positive electrode.

[0068] (2) FeSO4·7H2O is mixed with deionized water to form an iron electroplating solution with a concentration of 150 g / L; carbon fiber mesh and iron plate are inserted into the iron electroplating solution, the carbon fiber mesh is connected to the negative pole of a direct current power supply as a cathode, and the iron plate is connected to the positive pole of the direct current power supply as an anode, and then a current of 1.0 A is passed for 6 hours to form an iron plated carbon fiber mesh as a negative electrode;

[0069] (3) 4 parts of sodium hydroxide particles, 36 parts of sodium silicate aqueous solution, and 12 parts of deionized water are mixed to form a sodium-based alkali activator;

[0070] (4) Polyvinyl alcohol and deionized water are mixed to form a polyvinyl alcohol solution with a concentration of 20 wt%; polyethylene oxide and deionized water are mixed to form a polyethylene oxide solution with a concentration of 0.5 wt%; the polyvinyl alcohol solution and the polyethylene oxide solution are mixed in a mass ratio of 2:1 to form an ionic additive;

[0071] (5) 90 parts of fly ash and 10 parts of mineral powder are poured into a mortar mixer, stirred slowly for 2 min, then 52 parts of the sodium-based alkali activator prepared in step (3) are added to the mixer while stirring, stirred slowly for 2 min, then 7 parts of the ionic additive prepared in step (4) are added to the mixer, stirred slowly for 2 min, and finally 100 parts of standard sand are added to the mortar mixer, stirred slowly for 2 min first and then stirred quickly for 1 min to obtain an alkali-activated electrolyte;

[0072] (6) The alkali-activated electrolyte is poured into a mold, and the positive electrode and the negative electrode are embedded in the alkali-activated electrolyte, and after curing at room temperature, the mold is removed to form an alkali-activated rechargeable battery.

[0073] Example 2

[0074] Preparation method of alkali-activated rechargeable battery:

[0075] (1) NiSO4·7H2O, NiCl2·6H2O, and H3BO3 are mixed with deionized water to form solutions with concentrations of 200 g / L, 15 g / L, and 20 g / L, respectively, and then the three solutions are mixed to form a nickel electroplating solution; carbon fiber mesh and a nickel plate are inserted into the nickel electroplating solution, the carbon fiber mesh is connected to the negative pole of a direct current power supply as a cathode, and the nickel plate is connected to the positive pole of the direct current power supply as an anode, and then a current of 1.0 A is passed for 4 hours to form a nickel plated carbon fiber mesh as a positive electrode;

[0076] (2) FeSO4·7H2O is mixed with deionized water to form an iron electroplating solution with a concentration of 150 g / L; carbon fiber mesh and iron plate are inserted into the iron electroplating solution, the carbon fiber mesh is connected to the negative pole of a direct current power supply as a cathode, and the iron plate is connected to the positive pole of the direct current power supply as an anode, and then a current of 1.0 A is passed for 6 hours to form an iron plated carbon fiber mesh as a negative electrode;

[0077] (3) Mix 4 parts of sodium hydroxide granules, 36 parts of sodium silicate aqueous solution and 12 parts of deionized water as a sodium-based base activator;

[0078] (4) Mix polyvinyl alcohol and deionized water to prepare a 20 wt% polyvinyl alcohol solution; mix polyethylene oxide and deionized water to prepare a 0.5 wt% polyethylene oxide solution; mix the polyvinyl alcohol solution and the polyethylene oxide solution at a mass ratio of 1:2 as an ion additive;

[0079] (5) Pour 90 parts of fly ash and 10 parts of mineral powder into a mortar mixer and stir slowly for 2 minutes. Then add 52 parts of sodium-based alkali activator obtained in step (3) into the mixer while stirring. Stir slowly for 2 minutes. Add 7 parts of ionic additive obtained in step (4) into the mixer and stir slowly for 2 minutes. Finally, add 100 parts of standard sand into the mortar mixer and stir slowly for 2 minutes, then stir quickly for 1 minute to obtain alkali-activated electrolyte.

[0080] (6) Pour the alkaline-activated electrolyte into the mold, and embed the positive and negative electrodes into the alkaline-activated electrolyte. After curing at room temperature, demold to form an alkaline-activated rechargeable battery.

[0081] Example 3

[0082] Preparation method of alkaline-activated rechargeable battery:

[0083] (1) NiSO4·7H2O, NiCl2·6H2O, and H3BO3 were mixed with deionized water to form solutions with concentrations of 200 g / L, 15 g / L, and 20 g / L, respectively. The three solutions were then mixed to form a nickel plating solution. A carbon fiber mesh and a nickel plate were inserted into the nickel plating solution. The carbon fiber mesh was connected to the negative terminal of a DC power supply as the cathode, and the nickel plate was connected to the positive terminal of a DC power supply as the anode. A current of 1.0 A was applied for 4 hours to form a nickel-plated carbon fiber mesh, which was used as the positive electrode.

[0084] (2) Mix FeSO4·7H2O with deionized water to form an iron electroplating solution with a concentration of 150g / L; insert carbon fiber mesh and iron plate into the iron electroplating solution, with the carbon fiber mesh as the cathode connected to the negative terminal of the DC power supply and the iron plate as the anode connected to the positive terminal of the DC power supply, and pass a current of 1.0A for 6 hours to form an iron-coated carbon fiber mesh, which serves as the negative electrode.

[0085] (3) Mix 4 parts of sodium hydroxide granules, 36 parts of sodium silicate aqueous solution and 12 parts of deionized water as a sodium-based base activator;

[0086] (4) polyvinyl alcohol and deionized water are mixed to form a polyvinyl alcohol solution with a concentration of 20wt%; polyethylene oxide and deionized water are mixed to form a polyethylene oxide solution with a concentration of 0.5wt%; the polyvinyl alcohol solution and the polyethylene oxide solution are mixed in a mass ratio of 1:2 to serve as an ionic additive;

[0087] (5) 70 parts of fly ash and 30 parts of slag are poured into a mortar mixer, stirred slowly for 2 min, 52 parts of the sodium-based alkali activator prepared in step (3) are added into the mixer while stirring, stirred slowly for 2 min, 7 parts of the ionic additive prepared in step (4) are added into the mixer, stirred slowly for 2 min, and finally 100 parts of standard sand are added into the mortar mixer, stirred slowly for 2 min and then stirred quickly for 1 min to obtain an alkali-activated electrolyte;

[0088] (6) the alkali-activated electrolyte is poured into a mold, and the positive electrode and the negative electrode are embedded in the alkali-activated electrolyte, demolded after curing at room temperature, and an alkali-activated rechargeable battery is formed.

[0089] Example 4

[0090] Preparation method of the alkali-activated rechargeable battery:

[0091] (1) NiSO4·7H2O, NiCl2·6H2O and H3BO3 are mixed with deionized water to form solutions with concentrations of 200g / L, 15g / L and 20g / L respectively, and then the three solutions are mixed to form a nickel electroplating solution; a carbon fiber mesh and a nickel plate are inserted into the nickel electroplating solution, the carbon fiber mesh is connected to the negative electrode of a direct current power supply as a cathode, and the nickel plate is connected to the positive electrode of the direct current power supply as an anode, and a nickel plated carbon fiber mesh is prepared by passing a current of 1.0A for 4 hours, which serves as a positive electrode;

[0092] (2) FeSO4·7H2O is mixed with deionized water to form an iron electroplating solution with a concentration of 150g / L; a carbon fiber mesh and an iron plate are inserted into the iron electroplating solution, the carbon fiber mesh is connected to the negative electrode of a direct current power supply as a cathode, and the iron plate is connected to the positive electrode of the direct current power supply as an anode, and an iron plated carbon fiber mesh is prepared by passing a current of 1.0A for 6 hours, which serves as a negative electrode;

[0093] (3) 4 parts of sodium hydroxide particles, 36 parts of sodium silicate aqueous solution and 12 parts of deionized water are mixed to serve as a sodium-based alkali activator;

[0094] (4) polyvinyl alcohol and deionized water are mixed to form a polyvinyl alcohol solution with a concentration of 20wt%; polyethylene oxide and deionized water are mixed to form a polyethylene oxide solution with a concentration of 0.5wt%; the polyvinyl alcohol solution and the polyethylene oxide solution are mixed in a mass ratio of 1:2 to serve as an ionic additive;

[0095] (5) Pour 80 parts of fly ash and 20 parts of mineral powder into the mortar mixer and stir slowly for 2 minutes. Then add 48 parts of sodium-based alkali activator obtained in step (3) into the mixer while stirring. Stir slowly for 2 minutes. Add 10 parts of ionic additive obtained in step (4) into the mixer and stir slowly for 2 minutes. Finally, add 100 parts of standard sand into the mortar mixer and stir slowly for 2 minutes, then stir quickly for 1 minute to obtain alkali-activated electrolyte.

[0096] (6) Pour the alkaline-activated electrolyte into the mold, and embed the positive and negative electrodes into the alkaline-activated electrolyte. After curing at room temperature, demold to form an alkaline-activated rechargeable battery.

[0097] Example 5

[0098] Preparation method of alkaline-activated rechargeable battery:

[0099] (1) NiSO4·7H2O, NiCl2·6H2O, and H3BO3 were mixed with deionized water to form solutions with concentrations of 200 g / L, 15 g / L, and 20 g / L, respectively. The three solutions were then mixed to form a nickel plating solution. A carbon fiber mesh and a nickel plate were inserted into the nickel plating solution. The carbon fiber mesh was connected to the negative terminal of a DC power supply as the cathode, and the nickel plate was connected to the positive terminal of a DC power supply as the anode. A current of 1.0 A was applied for 4 hours to form a nickel-plated carbon fiber mesh, which was used as the positive electrode.

[0100] (2) Mix FeSO4·7H2O with deionized water to form an iron electroplating solution with a concentration of 150g / L; insert carbon fiber mesh and iron plate into the iron electroplating solution, with the carbon fiber mesh as the cathode connected to the negative terminal of the DC power supply and the iron plate as the anode connected to the positive terminal of the DC power supply, and pass a current of 1.0A for 6 hours to form an iron-coated carbon fiber mesh, which serves as the negative electrode.

[0101] (3) Mix 4 parts of sodium hydroxide granules, 36 parts of sodium silicate aqueous solution and 12 parts of deionized water as a sodium-based base activator;

[0102] (4) Mix polyvinyl alcohol and deionized water to prepare a 20 wt% polyvinyl alcohol solution; mix polyethylene oxide and deionized water to prepare a 0.5 wt% polyethylene oxide solution; mix the polyvinyl alcohol solution and the polyethylene oxide solution at a mass ratio of 2:1 as an ion additive;

[0103] (5) Pour 85 parts of fly ash and 15 parts of slag into a mortar mixer, stir slowly for 2 min, then add 50 parts of sodium-based alkali activator prepared in step (3) into the mixer while stirring, stir slowly for 2 min, add 9 parts of ion additive prepared in step (4) into the mixer, stir slowly for 2 min, and finally add 80 parts of standard sand into the mortar mixer, stir slowly for 2 min first, then stir quickly for 1 min to obtain an alkali-activated electrolyte;

[0104] (6) Pour the alkali-activated electrolyte into a mold, and embed the positive electrode and the negative electrode into the alkali-activated electrolyte, demold after curing at room temperature, and form an alkali-activated rechargeable battery.

[0105] Example 6

[0106] Preparation method of alkali-activated rechargeable battery:

[0107] (1) Mix NiSO4·7H2O, NiCl2·6H2O, and H3BO3 with deionized water to form solutions with concentrations of 200 g / L, 15 g / L, and 20 g / L, respectively, and then mix the three solutions to form a nickel electroplating solution; insert a carbon fiber mesh and a nickel plate into the nickel electroplating solution, connect the carbon fiber mesh as a cathode to the negative electrode of a direct current power supply, and connect the nickel plate as an anode to the positive electrode of the direct current power supply, pass a current of 1.0 A for 4 hours to prepare a nickel-plated carbon fiber mesh as a positive electrode;

[0108] (2) Mix FeSO4·7H2O with deionized water to form an iron electroplating solution with a concentration of 150 g / L; insert a carbon fiber mesh and an iron plate into the iron electroplating solution, connect the carbon fiber mesh as a cathode to the negative electrode of a direct current power supply, and connect the iron plate as an anode to the positive electrode of the direct current power supply, pass a current of 1.0 A for 6 hours to prepare an iron-plated carbon fiber mesh as a negative electrode;

[0109] (3) Mix 4 parts of sodium hydroxide particles, 36 parts of sodium silicate aqueous solution, and 12 parts of deionized water to form a sodium-based alkali activator;

[0110] (4) Mix polyvinyl alcohol and deionized water to form a polyvinyl alcohol solution with a concentration of 20 wt%; mix polyethylene oxide and deionized water to form a polyethylene oxide solution with a concentration of 0.5 wt%; and mix the polyvinyl alcohol solution and the polyethylene oxide solution according to a mass ratio of 2:1 to form an ion additive;

[0111] (5) 70 parts of fly ash and 30 parts of slag are poured into a mortar mixer, stirred slowly for 2 min, 52 parts of sodium-based alkali activator prepared in step (3) are added into the mortar mixer while stirring, stirred slowly for 2 min, 10 parts of ion additive prepared in step (4) are added into the mortar mixer, stirred slowly for 2 min, and finally 90 parts of standard sand are added into the mortar mixer, stirred slowly for 2 min and stirred quickly for 1 min, to obtain an alkali-activated electrolyte;

[0112] (6) The alkali-activated electrolyte is poured into a mold, and the positive electrode and the negative electrode are embedded in the alkali-activated electrolyte, and after curing at room temperature, the mold is demolded to form an alkali-activated rechargeable battery.

[0113] The performance test results of the above-mentioned partial examples are as follows:

[0114] The resistivity of the solid electrolyte prepared in Example 1 is 263 Ω·cm, and the compressive strength of the alkali-activated rechargeable battery is 32 MPa.

[0115] The resistivity of the solid electrolyte prepared in Example 2 is 322 Ω·cm, and the compressive strength of the alkali-activated rechargeable battery is 40 MPa.

[0116] The resistivity of the solid electrolyte prepared in Example 3 is 609 Ω·cm, and the compressive strength of the alkali-activated rechargeable battery is 54 MPa.

[0117] Example 7

[0118] Figure 2 An alkali-activated rechargeable battery device for steel reinforcement cathodic protection is shown, comprising:

[0119] A photovoltaic power generation system for converting solar energy into electrical energy;

[0120] An alkali-activated rechargeable battery connected to the photovoltaic power generation system and serving as its base; the negative electrode of the alkali-activated rechargeable battery is connected to the steel reinforcement in the concrete;

[0121] A positive electrode connected to the positive electrode of the alkali-activated rechargeable battery.

[0122] A reference electrode connected to the positive electrode;

[0123] A monitoring system connected to the positive electrode of the alkali-activated rechargeable battery for monitoring the electromotive force.

[0124] In one possible implementation, the positive electrode is high-silicon cast iron;

[0125] In one possible implementation, the reference electrode is silver / silver chloride.

[0126] The alkali-activated rechargeable battery device provides current to the steel bar through the concrete by the auxiliary anode, the steel bar in the concrete as the cathode, the reduction reaction occurs, the oxidation reaction of losing metal ions no longer occurs, the corrosion is inhibited, and the auxiliary anode will lose the oxidation reaction of electrons.

[0127] The alkali-activated rechargeable battery is connected in series to form a battery pack to provide cathode protection current for the protected steel bar. At the same time, the alkali-activated rechargeable battery is designed in an integrated manner with the photovoltaic system and is used as a basic base of the photovoltaic power generation system. The photovoltaic power generation system is connected with the positive and negative electrodes of the alkali-activated rechargeable battery, converts solar energy into electric energy to charge the battery, and stores the electric energy in the battery in the form of chemical energy. The positive electrode of the alkali-activated rechargeable battery is connected with a monitoring system, an anode and a reference electrode. The reference electrode is an electrode used for reference comparison when measuring the potential of various electrodes and is used to measure the electromotive force of the battery. The anode, the reference electrode and the cathode are connected through the concrete, and the current is transmitted from the anode to the cathode by using the ion movement in the concrete. The cathode is connected with the negative electrode of the alkali-activated rechargeable battery to form an electric circuit.

[0128] The above is only the preferred specific embodiment of the present application, but the scope of protection of the present application is not limited to this. Any modification, equivalent replacement and improvement made by any person skilled in the art within the technical range disclosed by the present application shall be included in the protection scope of the present application.

Claims

1. An alkali-activated rechargeable battery, characterized by, The solidified electrolyte, the positive electrode and the negative electrode; The solidified electrolyte is made by reverse molding and solidification of an alkali-activated electrolyte; the alkali-activated electrolyte comprises the following components in parts by mass: fly ash 70-90 parts, mineral powder 10-30 parts, sand 80-100 parts, sodium-based alkali activator 48-52 parts and ionic additive 7-10 parts; the sodium-based alkali activator comprises the following components in parts by mass: 3-4 parts of sodium hydroxide particles, 34-38 parts of sodium silicate aqueous solution and 11-13 parts of deionized water; the ionic additive comprises polyethylene oxide solution and polyvinyl alcohol solution; The positive electrode is a nickel-plated carbon fiber mesh; The negative electrode is an iron-plated carbon fiber mesh; The positive electrode and the negative electrode are embedded in the alkali-activated electrolyte before solidification.

2. The alkali-activated rechargeable battery of claim 1, wherein, The alkali-activated electrolyte comprises the following components in parts by mass: fly ash 80-90 parts, mineral powder 10-20 parts, sand 90-100 parts, sodium-based alkali activator 50-52 parts and ionic additive 7-10 parts.

3. The alkali-activated rechargeable battery of claim 1, wherein, The mineral powder comprises blast furnace mineral powder.

4. The alkali-activated rechargeable battery of claim 1, wherein, The concentration of the polyethylene oxide solution is 0.5wt%-1.0wt%, and the concentration of the polyvinyl alcohol solution is 20wt%-30wt%; the mass ratio of the polyethylene oxide solution to the polyvinyl alcohol solution is 2:1 or 1:

2.

5. The alkali-activated rechargeable battery of claim 4, wherein, The nickel-plated carbon fiber mesh is formed by immersing a carbon fiber mesh in a nickel electroplating solution and electroplating; the iron-plated carbon fiber mesh is formed by immersing a carbon fiber mesh in an iron electroplating solution and electroplating.

6. The alkali-activated rechargeable battery of claim 1, wherein, The preparation method of the solidified electrolyte comprises: The fly ash and the mineral powder are stirred in a blender, and the sodium-based alkali activator is added and stirred to form a uniform slurry; The ionic additive is added and stirred, and then the standard sand is added and stirred to form an alkali-activated electrolyte; The alkali-activated electrolyte is poured into a mold, and after solidification, the mold is removed to form a solidified electrolyte.

7. An alkali-activated rechargeable battery device for steel reinforcement cathodic protection, characterized by, It comprises: A photovoltaic power generation system for converting solar energy into electrical energy; The alkali-activated rechargeable battery of any one of claims 1-6 is connected to the photovoltaic power generation system and serves as its base; the negative electrode of the alkali-activated rechargeable battery is connected to the steel bars in the concrete; An anode connected to the positive electrode of the alkali-activated rechargeable battery.

8. The alkali-activated rechargeable battery device for rebar cathodic protection of claim 7, wherein, It further comprises: A reference electrode connected to the anode; A monitoring system connected to the positive electrode of the alkali-activated rechargeable battery for monitoring the electromotive force.

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