A positive and negative electrode of a long-life lead-carbon battery for energy storage and a preparation method and a lead-carbon battery

Abstract

This invention provides a positive and negative electrode for a long-life lead-carbon battery for energy storage, a method for preparing the electrode, and the lead-carbon battery itself. The positive electrode, by weight, comprises the following raw materials: 1000 parts lead powder, 0.6-1 parts ultra-strong polyester staple fiber, 1-2 parts carbon fiber, 1-3 parts high-purity colloidal graphite, 1-2 parts stannous sulfate, 0.4-0.8 parts bismuth trioxide, 1-3 parts cobalt sulfate, 1.5-3.5 parts trisodium phosphate, 10-30 parts fumed silica, 15-35 parts tetrabasic lead sulfate, 60-80 parts dilute sulfuric acid (1.4 g / ml), and pure water. 80-100 parts; The negative electrode, by weight, includes the following raw materials: 1000 parts lead powder, 0.6-1 part ultra-strong polyester staple fiber, 1-2 parts carbon fiber, 4-8 parts acetylene black, 1-3 parts carbon nanotubes, 1.5-3.5 parts high-purity humic acid, 1-3 parts graphene, 2-4 parts lignin, 5-15 parts ultrafine barium sulfate, 2-4 parts barium stearate, 1-3 parts indium oxide, 50-70 parts dilute sulfuric acid (1.4 g / ml), and 80-100 parts pure water; DOD 70% with a cycle life of ≥2000 times.

Description

Technical Field

[0001] This invention relates to lead-carbon batteries, and more particularly to the positive and negative electrodes of a long-life lead-carbon battery for energy storage, a method for preparing the same, and the lead-carbon battery itself. Background Technology

[0002] Currently, the quality of lead-carbon batteries in China varies greatly. Very few manufacturers can meet the national standard GB / T 36280-2023 for lead-carbon batteries for power storage. Some manufacturers only address the positive or negative electrode of the battery, without systematically solving the problem for both electrodes, thus failing to meet the battery's usage requirements.

[0003] For example, CN105810927A describes a lead-carbon battery negative electrode material, which aims to improve the charge acceptance of the battery negative electrode, thereby improving the battery's specific power and cycle life. However, this invention only addresses the cycle life and related performance of the negative electrode, but does not improve the cycle life and related performance of the battery positive electrode, thus failing to fundamentally solve the overall problem of the battery's cycle life and related performance.

[0004] CN107611354A describes a method for preparing a positive electrode plate for a lead-carbon battery. The invention aims to improve the utilization rate and corrosion resistance of the positive electrode, thereby alleviating the shedding phenomenon of the positive electrode under high-rate partial charge state, and thus improving the energy density and cycle life of the positive electrode. However, it does not solve the cycle life of the positive and negative electrodes during deep discharge (60%-100% discharge depth), nor does it improve the cycle life of the negative electrode and other related performance. Fundamentally, it does not solve the overall problem of the cycle life and other related performance of the battery.

[0005] CN119742330A describes a long-life lead-carbon battery positive electrode formula and manufacturing process. The invention aims to reduce gas evolution at the positive electrode plate, thereby minimizing impact on the grid and active material, extending the grid's corrosion resistance, improving conductivity, and reducing irreversible sulfation, thus extending the battery's positive electrode lifespan. However, the cycle life is only 488 cycles. It does not fundamentally solve the overall problem of battery lifespan. Summary of the Invention

[0006] To address the aforementioned issues, this invention provides positive and negative electrodes for a long-life lead-carbon battery used for energy storage, a method for preparing such electrodes, and the lead-carbon battery itself, with a DOD of 70% and a cycle life of ≥2000 cycles.

[0007] The object of this invention is achieved in the following manner: Positive and negative electrodes for a long-life lead-carbon battery used for energy storage. The positive electrode, by weight, comprises the following raw materials: 1000 parts lead powder, 0.6-1 parts ultra-strong polyester staple fiber, 1-2 parts carbon fiber, 1-3 parts high-purity colloidal graphite, 1-2 parts stannous sulfate, 0.4-0.8 parts bismuth trioxide, 1-3 parts cobalt sulfate, 1.5-3.5 parts trisodium phosphate, 10-30 parts fumed silica, 15-35 parts tetrabasic lead sulfate, 60-80 parts dilute sulfuric acid (1.4 g / ml), and 80-100 parts pure water. The negative electrode, by weight, comprises the following raw materials: 1000 parts lead powder, 0.6-1 parts ultra-strong polyester staple fiber, 1-2 parts carbon fiber, 4-8 parts acetylene black, 1-3 parts carbon nanotubes, 1.5-3.5 parts high-purity humic acid, 1-3 parts graphene, 2-4 parts lignin, 5-15 parts ultrafine barium sulfate, 2-4 parts barium stearate, 1-3 parts indium oxide, 50-70 parts dilute sulfuric acid (1.4 g / ml), and 80-100 parts pure water. The fineness of a single ultra-strong polyester staple fiber is less than 2D, the length is 2-4mm, and the breaking strength is greater than or equal to 8CN / dtex.

[0008] Colloidal graphite has a particle size of less than 30 micrometers and a carbon content of more than 99.95%.

[0009] The fineness of a single carbon fiber is less than 2D, the length is 2-4mm, and the resistivity is less than 17 micro ohms.m.

[0010] A method for preparing positive and negative electrodes for long-life lead-carbon batteries used in energy storage includes the following steps: The cathode preparation method includes the following steps: Step 1: Material preparation: Weigh each raw material; Step 2: Dry mixing: Add all the raw materials from Step 1 (excluding pure water and dilute sulfuric acid) to the paste mixer and mix evenly; Step 3: Wet mixing: Add pure water to the paste mixer and mix well; Step 4: Acid stirring: Add dilute sulfuric acid to the paste mixer in at least three batches, adding it over 12 minutes. Then stir the acid for 10 minutes to obtain the positive electrode lead paste. Step 5: Positive electrode plate fabrication: Apply positive electrode lead paste to the grid frame to form a positive electrode plate, and then cure it; The negative electrode preparation method includes the following steps: Step 1: Material preparation: Weigh each raw material; Step 2: Dry mixing: Add all the raw materials from Step 1 (excluding pure water and dilute sulfuric acid) to the paste mixer and mix well; Step 3: Wet mixing: Add pure water to the paste mixer and mix well; Step 4: Acid stirring: Add dilute sulfuric acid to the paste mixer in at least three portions, adding it over 15 minutes. Then stir the acid for 10 minutes to obtain the negative electrode lead paste. Step 5: Negative electrode plate fabrication: Apply negative electrode lead paste to the grid skeleton to form a negative electrode plate, and then cure it.

[0011] The preparation method of positive and negative electrodes for long-life lead-carbon batteries for energy storage also includes the following steps: The negative electrode preparation method also includes the following steps: Step 6: Curing: Remove the negative electrode plate and place it on the curing rack. Then push the curing rack into the curing chamber for curing. Curing includes a high temperature and high humidity stage, an oxidation stage, and a drying stage. The high temperature and high humidity stage lasts for 20-25 hours, the oxidation stage lasts for 15-20 hours, and the drying stage lasts for 20 hours. The cathode preparation method also includes the following steps: Step 6: Curing: Remove the positive electrode plate and place it on the curing rack. Then push the curing rack into the curing chamber for curing. The curing process includes a high temperature and high humidity stage, an oxidation stage, and a drying stage. The high temperature and high humidity stage lasts for 20-25 hours, the oxidation stage lasts for 15-20 hours, and the drying stage lasts for 20 hours.

[0012] The negative electrode preparation method also includes the following steps: Step 7: Separation: Place the negative electrode plate that was cured in step 6 into the separation machine for separation.

[0013] Step 8: Formation: Assemble the negative electrode plates separated in Step 7 into a semi-finished battery, then fill the semi-finished battery with electrolyte, and perform formation using a process of 6 charge cycles and 5 discharge cycles.

[0014] The cathode preparation method also includes the following steps: Step 7: Separation: Place the solidified positive electrode plate from step 6 into the separation machine for separation.

[0015] Step 8: Formation: Assemble the positive plates separated in Step 7 into a semi-finished battery, then fill the semi-finished battery with electrolyte, and perform formation using a process of 6 charge cycles and 5 discharge cycles.

[0016] A lead-carbon battery, wherein the positive and negative electrodes of the lead-carbon battery are as described above.

[0017] Compared with the prior art, the present invention provides positive and negative electrodes for a long-life lead-carbon battery for energy storage, a method for preparing the electrodes, and the lead-carbon battery with a DOD70% and a cycle life of greater than or equal to 2000 cycles. Attached Figure Description

[0018] Figure 1 This is a flowchart illustrating the preparation and production process of the positive and negative electrodes.

[0019] Figure 2 The graph shows the cycle durability of GFMC500 and GFM500 batteries. Detailed Implementation

[0020] The present invention will now be described in detail with reference to specific embodiments. It should be noted that these embodiments are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Those skilled in the art can make some non-essential improvements and adjustments based on the above description of the present invention. Raw material source:

[0021] Electrolytic lead: Purchased from Henan Yuguang Gold & Lead Co., Ltd., No. 1 electrolytic lead.

[0022] Lead powder: homemade, using a Shimadzu lead powder machine to oxidize electrolytic lead into powder. The lead powder has an oxidation degree of 70-80%, an apparent specific gravity of 1.3-1.5 g / cm3, and Fe content of less than 0.0005%.

[0023] High-strength polyester fiber: Purchased from Jinkeli Company, model X2D3L. The fineness of a single high-strength polyester fiber is less than 2D, the length is 2-4mm, and the breaking strength is greater than or equal to 8CN / dtex.

[0024] Carbon fiber: Purchased from Jinkeli Company, model C17-2D3L. The fineness of a single carbon fiber is less than 2D, the length is 2-4mm, and the resistivity is less than 17 micro ohms.meter.

[0025] High-purity colloidal graphite: purchased from Jinkeli Company, model C9995. The colloidal graphite has a particle size of less than 30 micrometers and a carbon content of greater than 99.95%.

[0026] Bismuth trioxide: Purchased from Longxi Chemical Company, analytical grade.

[0027] Stannous sulfate: Purchased from Longxi Chemical Company, analytical grade.

[0028] Cobalt sulfate: Purchased from Longxi Chemical Company, analytical grade.

[0029] Trisodium phosphate: Purchased from Longxi Chemical Company, analytical grade.

[0030] Fumed silica: Degussa A200 fumed silica was used.

[0031] Carbon nanotubes: Purchased from Zhongke Times Nano, model TNWICNNP.

[0032] Graphene: Purchased from Zhongke Times Nano, model number TNWIGNP.

[0033] Indium oxide: Purchased from Longxi Chemical Company, analytical grade.

[0034] Tetrabasic lead sulfate: Purchased from Jinkeli Company, model 4BS.

[0035] Lignin: Purchased from Jinkeli Company, model N.

[0036] Acetylene black: Purchased from Jiaozuo Hexing Chemical Company, model: analytical grade for storage batteries.

[0037] Humic acid: Purchased from Jinkeli Company, model: high-purity humic acid.

[0038] Barium sulfate: Purchased from Nanfeng Group Co., Ltd., model: ultrafine barium sulfate. Example 1:

[0039] A positive and negative electrode formulation for a long-life lead-carbon battery for energy storage: The positive electrode, by weight, comprises the following raw materials: 1000 parts lead powder, 0.6 parts ultra-strong polyester staple fiber, 1 part carbon fiber, 1 part high-purity colloidal graphite, 1 part stannous sulfate, 0.4 parts bismuth trioxide, 1 part cobalt sulfate, 1.5 parts trisodium phosphate, 10 parts fumed silica, 15 parts tetrabasic lead sulfate, 60 parts dilute sulfuric acid (1.4 g / ml), and 80 parts pure water.

[0040] The negative electrode, by weight, comprises the following raw materials: 1000 parts lead powder, 0.6 parts ultra-strong polyester staple fiber, 1 part carbon fiber, 4 parts acetylene black, 1 part carbon nanotube, 1.5 parts high-purity humic acid, 1 part graphene, 2 parts lignin, 5 parts ultrafine barium sulfate, 2 parts barium stearate, 1 part indium oxide, 50 parts dilute sulfuric acid (1.4 g / ml), and 80 parts pure water.

[0041] A method for preparing positive and negative electrodes for long-life lead-carbon batteries used in energy storage includes the following steps: The preparation method of the positive electrode includes the following steps: Step 1: Material preparation: Weigh each raw material; Step 2: Dry mixing: Add all the raw materials from Step 1 (excluding pure water and dilute sulfuric acid) to the paste mixer and dry mix until homogeneous; Step 3: Wet mixing: Add pure water to the paste mixer and wet mix until evenly mixed; Step 4: Acid stirring: Add dilute sulfuric acid to the paste mixer in three batches, and stir evenly to obtain positive electrode lead paste. Step 5: Positive electrode plate fabrication: Apply positive electrode lead paste to the grid frame to form the positive electrode plate; Step 6: Curing: Remove the positive electrode plate and place it on the curing rack. Then push the curing rack into the curing chamber for curing. The curing process includes a high temperature and high humidity stage, an oxidation stage, and a drying stage. The high temperature and high humidity stage lasts for 20 hours, the oxidation stage lasts for 15 hours, and the drying stage lasts for 20 hours. Step 7: Separation: Place the solidified positive electrode plate from step 6 into the separation machine for separation.

[0042] The method for preparing the negative electrode includes the following steps: Step 1: Material preparation: Weigh each raw material; Step 2: Dry mixing: Add all the raw materials from Step 1 (excluding pure water and dilute sulfuric acid) to the paste mixer and dry mix until homogeneous; Step 3: Wet mixing: Add pure water to the paste mixer and wet mix until evenly mixed; Step 4: Acid stirring: Add dilute sulfuric acid to the paste mixer in three batches, and stir evenly to obtain negative electrode lead paste. Step 5: Negative electrode plate fabrication: Apply negative electrode lead paste to the grid frame to form the negative electrode plate; Step 6: Curing: Remove the negative electrode plate and place it on the curing rack. Then push the curing rack into the curing chamber for curing. The curing process includes a high temperature and high humidity stage, an oxidation stage, and a drying stage. The high temperature and high humidity stage lasts for 20 hours, the oxidation stage lasts for 15 hours, and the drying stage lasts for 20 hours. Step 7: Separation: Place the negative electrode plate that was cured in step 6 into the separation machine for separation; Step 8: Formation: Assemble the negative and positive plates separated in Step 7 of the negative and positive electrode preparation methods into a semi-finished battery, then fill the semi-finished battery with electrolyte, and perform formation using a 6-charge and 5-discharge process to obtain the GFMC500 long-life lead-carbon battery for energy storage. Example 2:

[0043] A positive and negative electrode formulation for a long-life lead-carbon battery for energy storage: The positive electrode, by weight, comprises the following raw materials: 1000 parts lead powder, 0.8 parts ultra-strong polyester staple fiber, 1.5 parts carbon fiber, 2 parts high-purity colloidal graphite, 1.5 parts stannous sulfate, 0.6 parts bismuth trioxide, 2 parts cobalt sulfate, 2.5 parts trisodium phosphate, 20 parts fumed silica, 25 parts tetrabasic lead sulfate, 70 parts dilute sulfuric acid (1.4 g / ml), and 90 parts pure water. The negative electrode, by weight, comprises the following raw materials: 1000 parts lead powder, 0.8 parts ultra-strong polyester staple fiber, 1.5 parts carbon fiber, 6 parts acetylene black, 2 parts carbon nanotubes, 2.5 parts high-purity humic acid, 2 parts graphene, 3 parts lignin, 10 parts ultrafine barium sulfate, 3 parts barium stearate, 2 parts indium oxide, 60 parts dilute sulfuric acid (1.4 g / ml), and 90 parts pure water.

[0044] A method for preparing positive and negative electrodes for long-life lead-carbon batteries used in energy storage includes the following steps: The preparation method of the positive electrode includes the following steps: Step 1: Material preparation: Weigh each raw material; Step 2: Dry mixing: Add all the raw materials from Step 1 (excluding pure water and dilute sulfuric acid) to the paste mixer and dry mix until homogeneous; Step 3: Wet mixing: Add pure water to the paste mixer and wet mix until evenly mixed; Step 4: Acid stirring: Add dilute sulfuric acid to the paste mixer in four batches, and stir evenly to obtain positive electrode lead paste. Step 5: Positive electrode plate fabrication: Apply positive electrode lead paste to the grid frame to form the positive electrode plate; Step 6: Curing: Remove the positive electrode plate and place it on the curing rack. Then push the curing rack into the curing chamber for curing. The curing process includes a high temperature and high humidity stage, an oxidation stage, and a drying stage. The high temperature and high humidity stage lasts for 22 hours, the oxidation stage lasts for 18 hours, and the drying stage lasts for 20 hours. Step 7: Separation: Place the solidified positive electrode plate from step 6 into the separation machine for separation.

[0045] The method for preparing the negative electrode includes the following steps: Step 1: Material preparation: Weigh each raw material; Step 2: Dry mixing: Add all the raw materials from Step 1 (excluding pure water and dilute sulfuric acid) to the paste mixer and dry mix until homogeneous; Step 3: Wet mixing: Add pure water to the paste mixer and wet mix until evenly mixed; Step 4: Acid stirring: Add dilute sulfuric acid to the paste mixer in four batches, and stir evenly to obtain negative electrode lead paste. Step 5: Negative electrode plate fabrication: Apply negative electrode lead paste to the grid frame to form the negative electrode plate; Step 6: Curing: Remove the negative electrode plate and place it on the curing rack. Then push the curing rack into the curing chamber for curing. The curing process includes a high temperature and high humidity stage, an oxidation stage, and a drying stage. The high temperature and high humidity stage lasts for 22 hours, the oxidation stage lasts for 18 hours, and the drying stage lasts for 20 hours. Step 7: Separation: Place the negative electrode plate that was cured in step 6 into the separation machine for separation; Step 8: Formation: Assemble the negative and positive plates separated in Step 7 of the negative and positive electrode preparation methods into a semi-finished battery, then fill the semi-finished battery with electrolyte, and perform formation using a 6-charge and 5-discharge process to obtain the GFMC500 long-life lead-carbon battery for energy storage. Example 3:

[0046] A positive and negative electrode formulation for a long-life lead-carbon battery for energy storage: The positive electrode, by weight, comprises the following raw materials: 1000 parts lead powder, 1 part ultra-strong polyester staple fiber, 2 parts carbon fiber, 3 parts high-purity colloidal graphite, 2 parts stannous sulfate, 0.8 parts bismuth trioxide, 3 parts cobalt sulfate, 3.5 parts trisodium phosphate, 30 parts fumed silica, 35 parts tetrabasic lead sulfate, 80 parts dilute sulfuric acid (1.4 g / ml), and 100 parts pure water.

[0047] The negative electrode, by mass, comprises the following raw materials: 1000 parts lead powder, 1 part ultra-strong polyester staple fiber, 2 parts carbon fiber, 8 parts acetylene black, 3 parts carbon nanotubes, 3.5 parts high-purity humic acid, 3 parts graphene, 4 parts lignin, 15 parts ultrafine barium sulfate, 4 parts barium stearate, 3 parts indium oxide, 70 parts dilute sulfuric acid (1.4 g / ml), and 100 parts pure water.

[0048] A method for preparing positive and negative electrodes for long-life lead-carbon batteries used in energy storage includes the following steps: The preparation method of the positive electrode includes the following steps: Step 1: Material preparation: Weigh each raw material; Step 2: Dry mixing: Add all the raw materials from Step 1 (excluding pure water and dilute sulfuric acid) to the paste mixer and dry mix until homogeneous.

[0049] Step 3: Wet mixing: Add pure water to the paste mixer and wet mix until evenly mixed; Step 4: Acid stirring: Add dilute sulfuric acid to the paste mixer in 5 batches, and stir evenly with acid to obtain positive electrode lead paste. Step 5: Positive electrode plate fabrication: Apply positive electrode lead paste to the grid frame to form the positive electrode plate; Step 6: Curing: Remove the positive electrode plate and place it on the curing rack. Then push the curing rack into the curing chamber for curing. The curing process includes a high temperature and high humidity stage, an oxidation stage, and a drying stage. The high temperature and high humidity stage lasts for 25 hours, the oxidation stage lasts for 20 hours, and the drying stage lasts for 20 hours. Step 7: Separation: Place the solidified positive electrode plate from step 6 into the separation machine for separation; The method for preparing the negative electrode includes the following steps: Step 1: Material preparation: Weigh each raw material; Step 2: Dry mixing: Add all the raw materials from Step 1 (excluding pure water and dilute sulfuric acid) to the paste mixer and dry mix until homogeneous; Step 3: Wet mixing: Add pure water to the paste mixer and wet mix until evenly mixed; Step 4: Acid stirring: Add dilute sulfuric acid to the paste mixer in 5 batches, and stir evenly to obtain negative electrode lead paste. Step 5: Negative electrode plate fabrication: Apply negative electrode lead paste to the grid frame to form the negative electrode plate; Step 6: Curing: Remove the negative electrode plate and place it on the curing rack. Then push the curing rack into the curing chamber for curing. The curing process includes a high temperature and high humidity stage, an oxidation stage, and a drying stage. The high temperature and high humidity stage lasts for 25 hours, the oxidation stage lasts for 20 hours, and the drying stage lasts for 20 hours. Step 7: Separation: Place the negative electrode plate that was cured in step 6 into the separation machine for separation; Step 8: Formation: Assemble the negative and positive plates separated in Step 7 of the negative and positive electrode preparation methods into a semi-finished battery, then fill the semi-finished battery with electrolyte, and perform formation using a 6-charge and 5-discharge process to obtain the GFMC500 long-life lead-carbon battery for energy storage.

[0050] Comparative Example 1: The positive and negative electrode formulations for a conventional stationary lead-acid battery. The positive electrode, by weight, comprises the following raw materials: 1000 parts lead powder, 0.6 parts ultra-strong polyester staple fiber, 2.5 parts high-purity colloidal graphite, 1 part stannous sulfate, 90 parts dilute sulfuric acid (1.4 g / ml), and 100 parts pure water.

[0051] The negative electrode, by mass, includes the following raw materials: 1000 parts lead powder, 0.6 parts ultra-strong polyester short fiber, 5 parts acetylene black, 3 parts high-purity humic acid, 3 parts lignin, 10 parts ultrafine barium sulfate, 75 parts dilute sulfuric acid (1.4 g / ml), and 110 parts pure water.

[0052] The preparation method of the positive and negative electrodes of the conventional stationary lead-acid battery is the same as that in Example 1, except that the raw materials that are not present are not added in the corresponding steps to produce the GFM500 stationary lead-acid battery.

[0053] For the GFMC500 batteries of Examples 1-3 and the GFM500 batteries of Comparative Example 1, a 70% DOD cycle durability test was conducted: 50A discharge for 7 hours, followed by constant voltage charging at an initial current of 100A and 2.35V / cell for 16 hours. This cycle was repeated 99 times. The 100th cycle verified the 10-hour capacity. When the capacity ≥ 400Ah, cycling continued. When the capacity < 400Ah, the cycle life ended, and these 100 cycles were not counted in the cycle life. The experimental results are shown in Table 1 and... Figure 2 As stated above.

[0054] Table 1: Comparison of Cycle Durability Data for GFMC500 and GFM500 Batteries

[0055] The data in the table shows that after the end of their lifespan, the cycle durability of Examples 1-3 is significantly higher than that of Comparative Example 1. This indicates that the positive and negative electrode formulations of the present invention significantly improve cycle durability, thereby increasing the battery's lifespan in power storage and meeting the requirement of cycle durability greater than or equal to 2000 cycles in standard GB / T 36280-2023. The above descriptions are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. It should be noted that for those skilled in the art, any equivalent substitutions or modifications made to the technical solutions and inventive concepts of the present invention without departing from the overall concept of the present invention, as well as any changes and improvements made, should also be considered within the scope of protection of the present invention.

Claims

1. A positive and negative electrode for a long-life lead-carbon battery used for energy storage, characterized in that: The positive electrode, by weight, comprises the following raw materials: 1000 parts lead powder, 0.6-1 parts ultra-strong polyester staple fiber, 1-2 parts carbon fiber, 1-3 parts high-purity colloidal graphite, 1-2 parts stannous sulfate, 0.4-0.8 parts bismuth trioxide, 1-3 parts cobalt sulfate, 1.5-3.5 parts trisodium phosphate, 10-30 parts fumed silica, 15-35 parts tetrabasic lead sulfate, 60-80 parts dilute sulfuric acid (1.4 g / ml), and 80-100 parts pure water. The negative electrode, by weight, includes the following raw materials: 1000 parts lead powder, 0.6-1 parts ultra-strong polyester staple fiber, 1-2 parts carbon fiber, 4-8 parts acetylene black, 1-3 parts carbon nanotubes, 1.5-3.5 parts high-purity humic acid, 1-3 parts graphene, 2-4 parts lignin, 5-15 parts ultrafine barium sulfate, 2-4 parts barium stearate, 1-3 parts indium oxide, 50-70 parts dilute sulfuric acid (1.4 g / ml), and 80-100 parts pure water.

2. The positive and negative electrodes of the long-life lead-carbon battery for energy storage according to claim 1, characterized in that: Colloidal graphite has a particle size of less than 30 micrometers and a carbon content of more than 99.95%.

3. The positive and negative electrodes of the long-life lead-carbon battery for energy storage according to claim 1, characterized in that: The fineness of a single carbon fiber is less than 2D, the length is 2-4mm, and the resistivity is less than 17 micro ohms.m.

4. The method for preparing the positive and negative electrodes of a long-life lead-carbon battery for energy storage according to any one of claims 1-3, characterized in that: The cathode preparation method includes the following steps: Step 1: Material preparation: Weigh each raw material; Step 2: Dry mixing: Add all the raw materials from Step 1 (excluding pure water and dilute sulfuric acid) to the paste mixer and mix evenly; Step 3: Wet mixing: Add pure water to the paste mixer and mix well; Step 4: Acid stirring: Add dilute sulfuric acid to the paste mixer in at least three batches, adding it over 12 minutes. Then stir the acid for 10 minutes to obtain the positive electrode lead paste. Step 5: Positive electrode plate fabrication: Apply positive electrode lead paste to the grid frame to form a positive electrode plate, and then cure it; The negative electrode preparation method includes the following steps: Step 1: Material preparation: Weigh each raw material; Step 2: Dry mixing: Add all the raw materials from Step 1 (excluding pure water and dilute sulfuric acid) to the paste mixer and mix well; Step 3: Wet mixing: Add pure water to the paste mixer and mix well; Step 4: Acid stirring: Add dilute sulfuric acid to the paste mixer in at least three portions, adding it over 15 minutes. Then stir the acid for 10 minutes to obtain the negative electrode lead paste. Step 5: Negative electrode plate fabrication: Apply negative electrode lead paste to the grid skeleton to form a negative electrode plate, and then cure it.

5. The method for preparing the positive and negative electrodes of a long-life lead-carbon battery for energy storage according to claim 4, characterized in that: Preparation method of positive and negative electrodes for long-life lead-carbon batteries for energy storage The negative electrode preparation method also includes the following steps: Step 6: Curing: Remove the negative electrode plate and place it on the curing rack. Then push the curing rack into the curing chamber for curing. Curing includes a high temperature and high humidity stage, an oxidation stage, and a drying stage. The high temperature and high humidity stage lasts for 20-25 hours, the oxidation stage lasts for 15-20 hours, and the drying stage lasts for 20 hours. The cathode preparation method also includes the following steps: Step 6: Curing: Remove the positive electrode plate and place it on the curing rack. Then push the curing rack into the curing chamber for curing. The curing process includes a high temperature and high humidity stage, an oxidation stage, and a drying stage. The high temperature and high humidity stage lasts for 20-25 hours, the oxidation stage lasts for 15-20 hours, and the drying stage lasts for 20 hours.

6. The method for preparing the positive and negative electrodes of a long-life lead-carbon battery for energy storage according to claim 4, characterized in that: Preparation method of positive and negative electrodes for long-life lead-carbon batteries for energy storage The negative electrode preparation method also includes the following steps: Step 7: Separation: Place the negative electrode plate that was cured in step 6 into the separation machine for separation; Step 8: Formation: Assemble the negative electrode plates separated in Step 7 into a semi-finished battery, then fill the semi-finished battery with electrolyte, and perform formation using a process of 6 charge cycles and 5 discharge cycles. The cathode preparation method also includes the following steps: Step 7: Separation: Place the solidified positive electrode plate from step 6 into the separation machine for separation; Step 8: Formation: Assemble the positive plates separated in Step 7 into a semi-finished battery, then fill the semi-finished battery with electrolyte, and perform formation using a process of 6 charge cycles and 5 discharge cycles.

7. A lead-carbon battery, characterized in that: The positive and negative electrodes of the lead-carbon battery are the positive and negative electrodes described in any one of claims 1-3 or prepared by the preparation method described in any one of claims 4-6.

Images