CN112652782B - Environment-friendly geopolymer battery and preparation method thereof - Google Patents
Environment-friendly geopolymer battery and preparation method thereof Download PDFInfo
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- CN112652782B CN112652782B CN202011428602.9A CN202011428602A CN112652782B CN 112652782 B CN112652782 B CN 112652782B CN 202011428602 A CN202011428602 A CN 202011428602A CN 112652782 B CN112652782 B CN 112652782B
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Abstract
The invention discloses an environment-friendly geopolymer battery which sequentially comprises a first metal patch, a positive electrode layer, an electrolyte layer, a negative electrode layer and a second metal patch from top to bottom; the positive electrode layer comprises, by mass, 40-50 parts of geopolymer powder, 20-30 parts of a potassium-based alkali activator, 15-25 parts of manganese dioxide powder and 2-3 parts of graphite powder; the electrolyte layer comprises 4-5 parts of geopolymer powder and 4-5 parts of potassium-based alkali activator as raw materials; the raw materials of the negative electrode layer comprise 40-50 parts of geopolymer powder, 20-30 parts of potassium-based alkali activator and 10-20 parts of zinc powder. The environment-friendly geopolymer battery provided by the technical scheme has stable current output, can effectively improve the metal utilization rate of the battery and reduce the recovery processing cost of the battery, and has small influence on the environment. The preparation method of the environment-friendly geopolymer battery is simple in process, strong in operability and beneficial to ensuring that the geopolymer battery can stably output current.
Description
Technical Field
The invention relates to the technical field of dry batteries, in particular to an environment-friendly geopolymer battery and a preparation method thereof.
Background
The civil dry battery is the most used and dispersed battery product. According to the development report of recycled resource recycling industry in China (2016) published by the department of commerce, the development department of circulation industry and the recycling society of goods and materials in China, 229.74 hundred million batteries are consumed in 2015. However, in 2015, the recovery amount of waste batteries (except for lead-acid batteries) in China is about 10 million tons, wherein the recovery amount of waste primary batteries is about 3 million tons, the recovery amount of waste secondary batteries is about 7 million tons, and if the recovery amount of the waste secondary batteries is converted into 25 grams of one battery on average, the recovery amount of the waste primary batteries is about 12 million, the recovery amount of the waste secondary batteries is 28 million, and about 40 million in total, which only accounts for 17.41% of the consumption amount of the batteries in 2015 in China.
The recovery rate of the waste dry battery is low, on one hand, the waste of a large amount of resources is caused: nickel, cobalt and manganese are basic metals of battery materials; 70% of manganese is provided domestically before 2003, and then the demand problem needs to be solved by relying on imported manganese ore, wherein the imported quantity exceeds 1200 ten thousand tons in 2015, the reserve of nickel in China only accounts for 3% of the world, but the consumption accounts for more than 20% of the world, and the import rate is as high as 60%; the domestic reserves of cobalt only account for 1.03% of the world, but the consumption accounts for 50% of the world, and more than 95% of the world depends on import.
On the other hand, the method is easy to cause environmental pollution: the cell generates electric energy by corrosion, and the corrosive substances of the cell contain a large amount of metal pollutants such as cadmium, mercury, manganese and the like. Although the mercury content is controlled before the national relevant regulations, if the battery is discarded at will or general household garbage is stacked in the nature, trace heavy metal elements still overflow from the battery slowly and enter soil or water sources, and then enter human bodies through food chains such as crops and the like. These toxic substances accumulate in the human body for a long time and are difficult to remove, and eventually damage the nervous system, hematopoietic function, kidney and bone, and even cause cancer.
The high recovery cost of disposable batteries is a major factor affecting their recovery rate. The recycling and disposal costs of disposable batteries are comparable to the sales price of the processed finished products, even hanging upside down, which means that there is a loss in disposing of these batteries, and many enterprises are reluctant to recycle and dispose of them. Disposable batteries occupy a large percentage of the lives of residents, and are all discarded at will. In addition, zinc and manganese are imported from foreign countries to manufacture dry batteries in large quantities every year in China. Therefore, a dry battery with high metal utilization rate, low recycling treatment cost and small environmental impact is urgently needed in the market of China.
Disclosure of Invention
The invention aims to provide an environment-friendly geopolymer battery which is stable in current output, capable of effectively improving the metal utilization rate of the battery and reducing the recycling cost of the battery, and small in environmental influence so as to overcome the defects in the prior art.
The invention also aims to provide a preparation method of the environment-friendly geopolymer battery, which is simple in process, strong in operability and beneficial to ensuring that the geopolymer battery can stably output current.
In order to achieve the purpose, the invention adopts the following technical scheme:
the environment-friendly geopolymer battery sequentially comprises a first metal patch, a positive electrode layer, an electrolyte layer, a negative electrode layer and a second metal patch from top to bottom;
the positive electrode layer comprises, by mass, 40-50 parts of geopolymer powder, 20-30 parts of a potassium-based alkali activator, 15-25 parts of manganese dioxide powder and 2-3 parts of graphite powder;
the electrolyte layer comprises 4-5 parts of geopolymer powder and 4-5 parts of potassium-based alkali activator as raw materials;
the raw materials of the negative electrode layer comprise 40-50 parts of geopolymer powder, 20-30 parts of potassium-based alkali activator and 10-20 parts of zinc powder.
Preferably, the raw materials of the negative electrode layer comprise, by mass, 40-50 parts of geopolymer powder, 20-30 parts of potassium-based alkali activator, 10-20 parts of zinc powder and 2-3 parts of graphite powder.
Preferably, the geopolymer powder comprises 5-6 parts of granulated blast furnace slag and 2-3 parts of fly ash according to parts by mass.
Preferably, the potassium-based alkali activator is a potassium silicate aqueous solution, the modulus of the potassium silicate aqueous solution is 2.0-2.1, and the concentration of the potassium silicate aqueous solution is 48-52%.
Preferably, the manganese dioxide powder is electrolytic manganese dioxide.
Preferably, the fineness of the manganese dioxide powder is 300-400 meshes, the fineness of the zinc powder is 2000-3000 meshes, and the fineness of the graphite powder is 3000-5000 meshes.
Preferably, the thickness of the positive electrode layer is 5-15 mm, the thickness of the electrolyte layer is 2-3 mm, and the thickness of the negative electrode layer is 5-15 mm.
Preferably, the resistivity of the first metal patch and the second metal patch is less than or equal to 0.1 [ mu ] omega.
Preferably, the length of the environment-friendly geopolymer battery is 4-5 cm, and the width of the environment-friendly geopolymer battery is 1-2 cm.
The preparation method of the environment-friendly geopolymer battery is used for preparing the environment-friendly geopolymer battery and comprises the following steps:
(1) mixing the granulated blast furnace slag and the fly ash according to the proportion to obtain geopolymer powder;
(2) stirring the geopolymer powder and the potassium-based alkali activator according to the proportion, adding manganese dioxide powder and graphite powder into the stirred geopolymer powder and the potassium-based alkali activator, and stirring again to obtain a positive electrode mixture;
(3) placing the first metal patch at the bottom of the mold, pouring the positive electrode mixture into the mold, and solidifying to form a positive electrode layer;
(4) stirring the geopolymer powder and the potassium-based alkali activator according to the proportion to obtain an electrolyte mixture;
(5) pouring the electrolyte mixture on the surface of the positive electrode layer, and forming an electrolyte layer after solidification;
(6) stirring the geopolymer powder and the potassium-based alkali activator according to the proportion, adding zinc powder into the stirred geopolymer powder and the potassium-based alkali activator, and then stirring again to obtain a negative electrode mixture;
(7) and pouring the negative electrode mixture on the surface of the electrolyte layer, placing the second metal patch on the surface of the negative electrode mixture, curing, and demolding to form the environment-friendly geopolymer battery.
The invention has the beneficial effects that:
1. in the technical scheme, the positive electrode layer, the electrolyte layer and the negative electrode layer of the environment-friendly geopolymer battery are all made of the same material, so that the battery materials have good compatibility and are favorable for tight connection between electrodes.
2. The integral structure of the environment-friendly geopolymer battery enables the battery to have good mechanical integrity, and the close interface between the electrolyte layer and any electrode layer and the graphite powder with good conductivity are added, so that the anode material has good conductivity, stable current output and high discharge efficiency.
3. Because the electrolyte in the technical scheme is the aqueous solution in geopolymer pores, the danger of electrolyte leakage of the traditional dry battery is avoided, and the safety is better.
4. The traditional dry battery adopts a zinc cylinder as a negative electrode, the zinc cylinder also needs to be used as a packaging material of the dry battery, otherwise, internal electrolyte and the like seep out, so that a large amount of zinc metal still exists in the zinc cylinder as the negative electrode when the electric quantity of the battery is exhausted, and resource waste is easily caused. The battery in the technical scheme does not need metal packaging, and the residual zinc powder quantity of the negative electrode is small when the battery is exhausted, so the metal utilization rate is high.
5. The environment-friendly geopolymer battery in the technical scheme omits a metal material used as a shell, can be directly crushed after being discarded to be used as concrete aggregate, has low recycling treatment cost, and greatly reduces the difficulty of battery waste post-treatment. And heavy metal elements in the battery are not easy to permeate and overflow after being solidified by concrete, the environmental influence is small, and the battery is a novel green battery.
Drawings
The drawings are further illustrative of the invention and the content of the drawings does not constitute any limitation of the invention.
FIG. 1 is a schematic view showing a hierarchical structure of an eco-friendly geopolymer battery according to the present invention.
Wherein: a first metal patch 1, a positive electrode layer 2, an electrolyte layer 3, a negative electrode layer 4, and a second metal patch 5.
Detailed Description
In order to solve the problems of large resource waste, low recovery rate and serious environmental pollution of the existing dry battery, the technical scheme provides an environment-friendly geopolymer battery which sequentially comprises a first metal patch 1, a positive electrode layer 2, an electrolyte layer 3, a negative electrode layer 4 and a second metal patch 5 from top to bottom; the positive electrode layer 2 comprises, by mass, 40-50 parts of geopolymer powder, 20-30 parts of potassium-based alkali activator, 15-25 parts of manganese dioxide powder and 2-3 parts of graphite powder; the electrolyte layer 3 comprises 4-5 parts of geopolymer powder and 4-5 parts of potassium-based alkali activator as raw materials; the raw materials of the negative electrode layer 4 comprise 40-50 parts of geopolymer powder, 20-30 parts of potassium-based alkali activator and 10-20 parts of zinc powder.
The environment-friendly geopolymer battery of the technical scheme is composed of a positive electrode layer 2, an electrolyte layer 3 and a negative electrode layer 4, wherein the positive electrode layer 2 and the negative electrode layer 4 are separated by the electrolyte layer 3.
The alkali-activated geopolymer is a green and environment-friendly material, and has low production energy consumption and low carbon dioxide emission. The alkali-activated geopolymer is cured by polycondensation, the curing principle is that the activated material is firstly dissolved under the action of an alkali activator, then hydrated and condensed to form gel which is composed of silicon-oxygen tetrahedron and aluminum-oxygen tetrahedron and has a spatial three-dimensional network-shaped bonding structure, and then cations of the alkali activator are filled between the silicon-oxygen tetrahedron and the aluminum-oxygen tetrahedron to play a role in connection.
The positive electrode layer 2, the electrolyte layer 3 and the negative electrode layer 4 in the technical scheme are all prepared from geopolymer powder and an alkali activator, after the geopolymer is hydrated, micropores which are mutually connected and communicated exist, pore water solution exists in the micropores, and water-soluble ions exist in the pore water solution, so that the ion conductor is an ion conductor. The environment-friendly geopolymer battery adopts geopolymer as electrolyte of the battery to transfer ions, zinc powder doped with the geopolymer is used as the negative electrode of the battery to undergo reduction reaction, manganese dioxide powder doped with the geopolymer is used as the positive electrode of the battery to undergo oxidation reaction to form the battery, and current is output. Furthermore, because the non-conductive active ingredient with high oxidation resistance is added into the geopolymer for the battery anode in the technical scheme, in order to ensure the continuity of active particles in the electrode, graphite powder is also added into the battery anode in the technical scheme to serve as a conductive additive, so that the electric connectivity of the battery is improved, the efficiency of the battery can be effectively improved, and the utilization rate of metal is improved. Furthermore, the common alkali activator in the alkali-excited geopolymer is a sodium-based alkali activator, and the potassium-based alkali activator is used as the activator of the alkali-excited geopolymer in the technical scheme, so that the conductivity of the alkali-excited geopolymer can be improved.
Compared with the prior art, the environment-friendly geopolymer battery in the technical scheme has the following advantages:
1. in the technical scheme, the positive electrode layer 2, the electrolyte layer 3 and the negative electrode layer 4 of the environment-friendly geopolymer battery are all made of the same material (namely, potassium-based alkali-activated geopolymer), so that the battery materials have good compatibility and are favorable for the tight connection between electrodes.
2. The integral structure of the environment-friendly geopolymer battery ensures that the battery has good mechanical integrity, and the close interface between the electrolyte layer 3 and any electrode layer and the graphite powder with good conductivity are added, so that the anode material has good conductivity, stable current output and high discharge efficiency.
3. Because the electrolyte in the technical scheme is the aqueous solution in geopolymer pores, the danger of electrolyte leakage of the traditional dry battery is avoided, and the safety is better.
4. The traditional dry battery adopts a zinc cylinder as a negative electrode, the zinc cylinder also needs to be used as a packaging material of the dry battery, otherwise, internal electrolyte and the like seep out, so that a large amount of zinc metal still exists in the zinc cylinder as the negative electrode when the electric quantity of the battery is exhausted, and resource waste is easily caused. The battery in the technical scheme does not need metal packaging, and the residual zinc powder quantity of the negative electrode is small when the battery is exhausted, so the metal utilization rate is high.
5. The environment-friendly geopolymer battery in the technical scheme omits a metal material used as a shell, can be directly crushed after being discarded to be used as concrete aggregate, has low recycling treatment cost, and greatly reduces the difficulty of battery waste post-treatment. And heavy metal elements in the battery are not easy to permeate and overflow after being solidified by concrete, the environmental influence is small, and the battery is a novel green battery.
Further, the raw material of the negative electrode layer 4 comprises, by mass, 40-50 parts of geopolymer powder, 20-30 parts of potassium-based alkali activator, 10-20 parts of zinc powder and 2-3 parts of graphite powder.
In order to further improve the conductivity of the environment-friendly geopolymer battery, the technical scheme is that graphite powder is added into the raw material of the negative electrode layer 4, so that the conductivity of the positive and negative electrode materials of the battery is excellent, the current output is stable, and the discharge efficiency is high.
Further, the geopolymer powder comprises 5-6 parts of granulated blast furnace slag and 2-3 parts of fly ash according to parts by mass.
The geopolymer powder in the technical scheme is formed by mixing granulated blast furnace slag and fly ash, and after the mixed powder is excited by alkali, the formed geopolymer space tetrahedral structures can be mutually embedded, so that the integral structure of the geopolymer is compact, the distance of ion movement is shortened, and meanwhile, the structure does not influence the ion movement, thereby being beneficial to improving the discharge efficiency of the battery.
Preferably, the granulated blast furnace slag is S105-grade granulated blast furnace slag, and the fly ash is first-grade fly ash.
Further, the potassium-based alkali activator is a potassium silicate aqueous solution, the modulus of the potassium silicate aqueous solution is 2.0 to 2.1, and the concentration of the potassium silicate aqueous solution is 48 to 52%.
In one technical scheme of the technical scheme, the potassium-based alkali activator is a potassium silicate aqueous solution, the modulus of the potassium silicate aqueous solution is limited to be 2.0-2.1, and the concentration is limited to be 48-52%.
When the modulus of the potassium silicate aqueous solution is lower than 2.0 and the concentration is lower than 48%, the geopolymer powder cannot be fully excited by the alkali activator, and the conductivity of the environment-friendly geopolymer battery is easily influenced by the unexcited geopolymer powder; when the modulus of the potassium silicate aqueous solution is higher than 2.1 and the concentration is higher than 52%, the alkali activator is excessive, the structure of the cured geopolymer is not dense enough, and the structure is unstable and cracks are generated easily during the discharge process.
As a preferred embodiment of the present invention, the aqueous solution of potassium silicate has a modulus of 2.0 and a concentration of 50%.
More specifically, the manganese dioxide powder is electrolytic manganese dioxide.
In one embodiment of the present disclosure, the manganese dioxide powder is electrolytic manganese dioxide prepared by electrolyzing a manganese sulfate solution. The electrolytic manganese dioxide is an excellent battery depolarizer, and compared with a dry battery produced by natural discharge manganese dioxide, the electrolytic manganese dioxide has the characteristics of large discharge capacity, strong activity, small volume, long service life and the like, and the discharge capacity of the dry battery made of 20-30% of the electrolytic manganese dioxide can be improved by 50-100% compared with that of the dry battery made of the natural manganese dioxide, so that the electrolytic manganese dioxide is used for improving the discharge efficiency of the battery in the technical scheme.
Further, the fineness of the manganese dioxide powder is 300-400 meshes, the fineness of the zinc powder is 2000-3000 meshes, and the fineness of the graphite powder is 3000-5000 meshes.
In order to improve the utilization rate of manganese dioxide and zinc, the technical scheme limits the fineness of manganese dioxide powder to 300-400 meshes and the fineness of zinc powder to 2000-3000 meshes. The fineness of the graphite powder can influence the conductivity of the anode and the cathode of the battery, and in order to ensure that the environment-friendly geopolymer battery obtains the maximum capacity, the fineness of the graphite powder is limited to 3000-5000 meshes.
Further, the thickness of the positive electrode layer 2 is 5 to 15mm, the thickness of the electrolyte layer 3 is 2 to 3mm, and the thickness of the negative electrode layer 4 is 5 to 15 mm.
In one embodiment of the present disclosure, the thickness of the positive electrode layer 2 is 5-15 mm, the thickness of the electrolyte layer is 2-3 mm, and the thickness of the negative electrode layer 4 is 5-15 mm.
When the thickness of the positive electrode layer 2 and the negative electrode layer 4 is less than 15mm, the total amount of zinc powder and manganese dioxide powder increases as the thickness of the positive and negative electrode layers increases, so that the voltage of the geopolymer battery increases and the capacity increases. When the thickness of the positive and negative electrode layers is larger than 15mm, the current loss becomes large because the conduction distance of ions in the geopolymer increases, and even if the total amount of zinc powder and manganese dioxide powder is increased, the total effect is to reduce the voltage and the total capacity, so that the waste of the zinc powder and manganese dioxide powder is caused due to the excessive thickness. When the thickness of the positive electrode layer and the negative electrode layer is less than 5mm, the battery efficiency is not improved.
When the thickness of the electrolyte layer 3 is less than 2mm, defects are easily generated to cause electric leakage, and when the thickness of the electrolyte layer 3 is more than 3mm, the conductive performance of the eco-friendly geopolymer battery is easily affected.
Further, the resistivity of the first metal patch 1 and the second metal patch 5 is 0.1 μ Ω · m or less.
In an embodiment of the present disclosure, the resistivity of the first metal patch 1 and the second metal patch 5 is less than or equal to 0.1 μ Ω · m, and when the resistivity of the metal of the first metal patch 1 and the second metal patch 5 is too large, the conductive efficiency is easily reduced. In an embodiment of the present disclosure, the first metal patch 1 and the second metal patch 5 may be made of copper, iron, or aluminum.
Furthermore, the environmentally friendly geopolymer battery has a length of 4 to 5cm and a width of 1 to 2 cm.
The technical scheme also provides a preparation method of the environment-friendly geopolymer battery, which is used for the environment-friendly geopolymer battery and comprises the following steps:
(1) mixing the granulated blast furnace slag and the fly ash according to the proportion to obtain geopolymer powder;
(2) stirring the geopolymer powder and the potassium-based alkali activator according to the proportion, adding manganese dioxide powder and graphite powder into the stirred geopolymer powder and the potassium-based alkali activator, and stirring again to obtain a positive electrode mixture;
(3) placing the first metal patch at the bottom of the mold, pouring the positive electrode mixture into the mold, and solidifying to form a positive electrode layer 2;
(4) stirring the geopolymer powder and the potassium-based alkali activator according to the proportion to obtain an electrolyte mixture;
(5) pouring the electrolyte mixture on the surface of the positive electrode layer 2, and forming an electrolyte layer 3 after solidification;
(6) stirring the geopolymer powder and the potassium-based alkali activator according to the proportion, adding zinc powder into the stirred geopolymer powder and the potassium-based alkali activator, and then stirring again to obtain a negative electrode mixture;
(7) and pouring the negative electrode mixture on the surface of the electrolyte layer 3, then placing a second metal patch on the surface of the negative electrode mixture, curing, and demolding to form the environment-friendly geopolymer battery.
The preparation method of the environment-friendly geopolymer battery provided by the technical scheme has the advantages of simple process and strong operability, and is beneficial to ensuring that the geopolymer battery can stably output current.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example 1-preparation of an environmentally friendly Geopolymer cell
(1) Mixing 5 parts of S105-grade granulated blast furnace slag and 2 parts of fly ash to obtain geopolymer powder;
(2) stirring 40 parts of geopolymer powder and 20 parts of potassium silicate aqueous solution with the modulus of 2.0 and the concentration of 48% for 1min at the speed of 700r/min, adding 15 parts of 300-mesh electrolytic manganese dioxide powder and 2 parts of 3000-mesh graphite powder into the stirred geopolymer powder and potassium silicate aqueous solution, and stirring for 1min at the speed of 700r/min to obtain a positive electrode mixture;
(3) placing a first metal patch with the size of 20mm x 20mm and the resistivity of 0.1 mu omega m at the bottom of a mold with the length of 4cm and the width of 1cm, pouring a positive electrode mixture into the mold, standing for 2min, and solidifying to form a positive electrode layer 2 with the thickness of 5 cm;
(4) stirring 4 parts of geopolymer powder and 4 parts of 48% potassium silicate aqueous solution with the modulus of 2.0 at the speed of 700r/min for 1min to obtain an electrolyte mixture;
(5) pouring the electrolyte mixture on the surface of the positive electrode layer 2, standing for 2min, and solidifying to form an electrolyte layer 3 with the thickness of 2 cm;
(6) stirring 40 parts of geopolymer powder and 20 parts of potassium silicate aqueous solution with the modulus of 2.0 and the concentration of 48% for 1min at the speed of 700r/min, adding 10 parts of 2000-mesh zinc powder into the stirred geopolymer powder and potassium silicate aqueous solution, and stirring for 1min at the speed of 700r/min to obtain a negative electrode mixture;
(7) and pouring the negative electrode mixture on the surface of the electrolyte layer 3, then placing a second metal patch with the size of 20mm x 20mm and the resistivity of 0.1 mu omega m on the surface of the negative electrode mixture, standing for 2min, curing and demolding to form the environment-friendly geopolymer battery, wherein the negative electrode layer 4 with the thickness of 5cm is formed after the negative electrode mixture is cured. The discharge efficiency of the environment-friendly geopolymer battery prepared by the preparation method is detected, the output voltage of the battery is 1.8V, and the capacity reaches 1500 Ah.
Example 2-preparation of an environmentally friendly Geopolymer cell
(1) Mixing 6 parts of S105-grade granulated blast furnace slag and 3 parts of fly ash to obtain geopolymer powder;
(2) stirring 45 parts of geopolymer powder and 20 parts of potassium silicate aqueous solution with the modulus of 2.1 and the concentration of 50% for 1min at the speed of 850r/min, adding 20 parts of 350-mesh electrolytic manganese dioxide powder and 3 parts of 4000-mesh graphite powder into the stirred geopolymer powder and potassium silicate aqueous solution, and stirring for 1min at the speed of 850r/min to obtain a positive electrode mixture;
(3) placing a first metal patch with the size of 20mm x 20mm and the resistivity of 0.05 mu omega m at the bottom of a mold with the length of 5cm and the width of 2cm, pouring a positive electrode mixture into the mold, standing for 2min, and solidifying to form a positive electrode layer 2 with the thickness of 10 cm;
(4) stirring 4 parts of geopolymer powder and 5 parts of potassium silicate aqueous solution with the modulus of 2.1 and the concentration of 50% for 1min at the speed of 850r/min to obtain an electrolyte mixture;
(5) pouring the electrolyte mixture on the surface of the positive electrode layer 2, standing for 2min, and solidifying to form an electrolyte layer 3 with the thickness of 3 cm;
(6) stirring 45 parts of geopolymer powder and 25 parts of potassium silicate aqueous solution with the modulus of 2.0 and the concentration of 50% for 1min at the speed of 850r/min, adding 15 parts of 2500-mesh zinc powder and 2 parts of 4000-mesh graphite powder into the stirred geopolymer powder and potassium silicate aqueous solution, and stirring for 1min at the speed of 850r/min to obtain a negative electrode mixture;
(7) and pouring the negative electrode mixture on the surface of the electrolyte layer 3, then placing a second metal patch with the size of 20mm x 20mm and the resistivity of 0.05 mu omega m on the surface of the negative electrode mixture, standing for 2min, curing and demolding to form the environment-friendly geopolymer battery, wherein the negative electrode layer 4 with the thickness of 10cm is formed after the negative electrode mixture is cured. The discharge efficiency of the environment-friendly geopolymer battery prepared by the preparation method is detected, the output voltage of the battery is 1.8V, and the capacity reaches 2200 Ah.
Example 3-preparation of an environmentally friendly Geopolymer cell
(1) Mixing 5 parts of S105-grade granulated blast furnace slag and 3 parts of fly ash to obtain geopolymer powder;
(2) stirring 50 parts of geopolymer powder and 30 parts of potassium silicate aqueous solution with the modulus of 2.0 and the concentration of 52% for 1min at the speed of 1000r/min, adding 25 parts of 400-mesh electrolytic manganese dioxide powder and 2 parts of 5000-mesh graphite powder into the stirred geopolymer powder and potassium silicate aqueous solution, and stirring for 1min at the speed of 1000r/min to obtain a positive electrode mixture;
(3) placing a first metal patch with the size of 20mm x 20mm and the resistivity of 0.1 mu omega m at the bottom of a mold with the length of 4cm and the width of 2cm, pouring a positive electrode mixture into the mold, standing for 2min, and solidifying to form a positive electrode layer 2 with the thickness of 15 cm;
(4) 5 parts of geopolymer powder and 4 parts of potassium silicate aqueous solution with the modulus of 2.0 and the concentration of 52 percent are stirred for 1min at the speed of 1000r/min to obtain an electrolyte mixture;
(5) pouring the electrolyte mixture on the surface of the positive electrode layer 2, standing for 2min, and solidifying to form an electrolyte layer 3 with the thickness of 3 cm;
(6) stirring 50 parts of geopolymer powder and 30 parts of potassium silicate aqueous solution with the modulus of 2.0 and the concentration of 52% for 1min at the speed of 1000r/min, adding 20 parts of 3000-mesh zinc powder and 3 parts of 5000-mesh graphite powder into the stirred geopolymer powder and potassium silicate aqueous solution, and stirring for 1min at the speed of 1000r/min to obtain a negative electrode mixture;
(7) and pouring the negative electrode mixture on the surface of the electrolyte layer 3, then placing a second metal patch with the size of 20mm x 20mm and the resistivity of 0.1 mu omega m on the surface of the negative electrode mixture, standing for 2min, curing and demolding to form the environment-friendly geopolymer battery, wherein the negative electrode layer 4 with the thickness of 15cm is formed after the negative electrode mixture is cured. The discharge efficiency of the environment-friendly geopolymer battery prepared by the preparation method is detected, the output voltage of the battery is 1.8V, and the capacity reaches 3000 Ah.
Example 4-preparation of an environmentally friendly Geopolymer cell
(1) Mixing 6 parts of S105-grade granulated blast furnace slag and 3 parts of fly ash to obtain geopolymer powder;
(2) stirring 40 parts of geopolymer powder and 25 parts of 52% potassium silicate aqueous solution with the modulus of 2.0 at the speed of 800r/min for 1min, adding 15 parts of 350-mesh electrolytic manganese dioxide powder and 3 parts of 4000-mesh graphite powder into the stirred geopolymer powder and potassium silicate aqueous solution, and stirring at the speed of 800r/min for 1min to obtain a positive electrode mixture;
(3) placing a first metal patch with the size of 20mm x 20mm and the resistivity of 0.05 mu omega m at the bottom of a mold with the length of 5cm and the width of 1cm, pouring a positive electrode mixture into the mold, standing for 2min, and solidifying to form a positive electrode layer 2 with the thickness of 10 cm;
(4) stirring 4 parts of geopolymer powder and 5 parts of 52 percent potassium silicate aqueous solution with the modulus of 2.0 for 1min at the speed of 800r/min to obtain an electrolyte mixture;
(5) pouring the electrolyte mixture on the surface of the positive electrode layer 2, standing for 2min, and solidifying to form an electrolyte layer 3 with the thickness of 2 cm;
(6) stirring 40 parts of geopolymer powder and 25 parts of 52% potassium silicate aqueous solution with the modulus of 2.0 at the speed of 800r/min for 1min, adding 15 parts of 2500-mesh zinc powder and 3 parts of 4000-mesh graphite powder into the geopolymer powder and the potassium silicate aqueous solution after stirring, and stirring at the speed of 800r/min for 1min to obtain a negative electrode mixture;
(7) and pouring the negative electrode mixture on the surface of the electrolyte layer 3, then placing a second metal patch with the size of 20mm x 20mm and the resistivity of 0.05 mu omega m on the surface of the negative electrode mixture, standing for 2min, curing and demolding to form the environment-friendly geopolymer battery, wherein the negative electrode layer 4 with the thickness of 10cm is formed after the negative electrode mixture is cured. The discharge efficiency of the environment-friendly geopolymer battery prepared by the preparation method is detected, the output voltage of the battery is 1.5V, the capacity reaches 1800mAh, and the battery can replace the traditional dry battery.
Example 5-preparation of an environmentally friendly Geopolymer cell
(1) Mixing 6 parts of S105-grade granulated blast furnace slag and 3 parts of fly ash to obtain geopolymer powder;
(2) stirring 40 parts of geopolymer powder and 25 parts of potassium silicate aqueous solution with the modulus of 2.0 and the concentration of 52% for 1min at the speed of 1000r/min, adding 25 parts of 350-mesh electrolytic manganese dioxide powder and 3 parts of 4000-mesh graphite powder into the stirred geopolymer powder and potassium silicate aqueous solution, and stirring for 1min at the speed of 1000r/min to obtain a positive electrode mixture;
(3) placing a first metal patch with the size of 20mm x 20mm and the resistivity of 0.05 mu omega m at the bottom of a mold with the length of 5cm and the width of 1cm, pouring a positive electrode mixture into the mold, standing for 2min, and solidifying to form a positive electrode layer 2 with the thickness of 15 cm;
(4) stirring 4 parts of geopolymer powder and 5 parts of potassium silicate aqueous solution with the modulus of 2.0 and the concentration of 52% for 1min at the speed of 1000r/min to obtain an electrolyte mixture;
(5) pouring the electrolyte mixture on the surface of the positive electrode layer 2, standing for 2min, and solidifying to form an electrolyte layer 3 with the thickness of 3 cm;
(6) stirring 40 parts of geopolymer powder and 25 parts of potassium silicate aqueous solution with the modulus of 2.0 and the concentration of 52% for 1min at the speed of 1000r/min, adding 20 parts of 2500-mesh zinc powder and 3 parts of 4000-mesh graphite powder into the stirred geopolymer powder and potassium silicate aqueous solution, and stirring for 1min at the speed of 1000r/min to obtain a negative electrode mixture;
(7) and pouring the negative electrode mixture on the surface of the electrolyte layer 3, then placing a second metal patch with the size of 20mm x 20mm and the resistivity of 0.05 mu omega m on the surface of the negative electrode mixture, standing for 2min, curing and demolding to form the environment-friendly geopolymer battery, wherein the negative electrode layer 4 with the thickness of 10cm is formed after the negative electrode mixture is cured. The discharge efficiency of the environment-friendly geopolymer battery prepared by the preparation method is detected, the output voltage of the battery is 1.5V, the capacity reaches 2500mAh, and the battery can replace a large-capacity battery for use.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (8)
1. An environmentally friendly geopolymer battery, characterized by: the anode comprises a first metal patch, a positive electrode layer, an electrolyte layer, a negative electrode layer and a second metal patch from top to bottom in sequence;
the positive electrode layer comprises, by mass, 40-50 parts of geopolymer powder, 20-30 parts of a potassium-based alkali activator, 15-25 parts of manganese dioxide powder and 2-3 parts of graphite powder;
the electrolyte layer comprises 4-5 parts of geopolymer powder and 4-5 parts of potassium-based alkali activator as raw materials;
the raw materials of the negative electrode layer comprise 40-50 parts of geopolymer powder, 20-30 parts of potassium-based alkali activator, 10-20 parts of zinc powder and 2-3 parts of graphite powder;
the geopolymer powder comprises 5-6 parts of granulated blast furnace slag and 2-3 parts of fly ash.
2. The environmentally friendly geopolymer battery of claim 1, wherein: the potassium-based alkali activator is a potassium silicate aqueous solution, the modulus of the potassium silicate aqueous solution is 2.0-2.1, and the concentration of the potassium silicate aqueous solution is 48-52%.
3. The environmentally friendly geopolymer battery of claim 1, wherein: the manganese dioxide powder is electrolytic manganese dioxide.
4. The environmentally friendly geopolymer battery of claim 1, wherein: the fineness of the manganese dioxide powder is 300-400 meshes, the fineness of the zinc powder is 2000-3000 meshes, and the fineness of the graphite powder is 3000-5000 meshes.
5. The environmentally friendly geopolymer battery of claim 1, wherein: the thickness of the positive electrode layer is 5-15 mm, the thickness of the electrolyte layer is 2-3 mm, and the thickness of the negative electrode layer is 5-15 mm.
6. The environmentally friendly geopolymer battery of claim 1, wherein: the resistivity of the first metal patch and the second metal patch is less than or equal to 0.1 [ mu ] omega.
7. The environmentally friendly geopolymer battery of claim 1, wherein: the length of the environment-friendly geopolymer battery is 4-5 cm, and the width of the environment-friendly geopolymer battery is 1-2 cm.
8. The method for preparing the environmentally friendly geopolymer battery as defined in any one of claims 1 to 7, comprising the steps of:
(1) mixing the granulated blast furnace slag and the fly ash according to the proportion to obtain geopolymer powder;
(2) stirring the geopolymer powder and the potassium-based alkali activator according to the proportion, adding manganese dioxide powder and graphite powder into the stirred geopolymer powder and the potassium-based alkali activator, and stirring again to obtain a positive electrode mixture;
(3) placing the first metal patch at the bottom of the mold, pouring the positive electrode mixture into the mold, and solidifying to form a positive electrode layer;
(4) stirring the geopolymer powder and the potassium-based alkali activator according to the proportion to obtain an electrolyte mixture;
(5) pouring the electrolyte mixture on the surface of the positive electrode layer, and forming an electrolyte layer after solidification;
(6) stirring the geopolymer powder and the potassium-based alkali activator according to the proportion, adding zinc powder into the stirred geopolymer powder and the potassium-based alkali activator, and then stirring again to obtain a negative electrode mixture;
(7) and pouring the negative electrode mixture on the surface of the electrolyte layer, placing the second metal patch on the surface of the negative electrode mixture, curing, and demolding to form the environment-friendly geopolymer battery.
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