A kind of slurry layer paper for improving the electrical performance and storage performance of carbon batteries
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANGZHOU TIGER HEAD BATTERY GROUP
- Filing Date
- 2026-04-03
- Publication Date
- 2026-06-09
Smart Images
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Abstract
Description
Technical Field
[0001] This invention relates to the field of pulp paper technology, specifically to a pulp paper that improves the electrical and storage performance of carbon-zinc batteries. Background Technology
[0002] Carbon-zinc batteries are a common type of disposable dry cell battery, widely used in low-power electronic devices. They are inexpensive and suitable for appliances with low current requirements, such as remote controls, wall clocks, electronic scales, wireless mice, and children's toys. Carbon-zinc batteries typically have a zinc canister or zinc sheet forming the battery casing, which also acts as the negative electrode in the oxidation reaction, releasing electrons. The zinc negative electrode in a carbon-zinc battery participates in the chemical reaction and also serves as the battery casing; during discharge, it is easily oxidized and consumed, leading to thinning and even perforation of the casing, ultimately causing electrolyte leakage. When leakage occurs, the internal structure of the battery is damaged, and its voltage output capability, internal resistance stability, and discharge efficiency all decrease, severely affecting the battery's electrical performance and lifespan. Furthermore, if the battery is subjected to accidental impact during use, or if external conductors connecting the positive and negative terminals are damaged, or if the internal structure is damaged, a short circuit may occur, potentially causing localized heating, softening of the casing, or even smoke, posing safety hazards.
[0003] The pulp paper is a key separator material in carbon-zinc batteries. Its main functions include acting as an insulating layer to prevent direct contact between the positive and negative electrodes, thus preventing short circuits; absorbing and locking in the electrolyte to form an ion-conducting pathway, maintaining the stability of the battery's internal structure, and improving discharge efficiency. Based on existing research, this application proposes a pulp paper material that combines leak prevention and improved battery electrical performance. This material can protect the zinc negative electrode during the storage and use of carbon-zinc batteries, slowing down its corrosion, extending its service life, and improving safety. Summary of the Invention
[0004] The purpose of this invention is to provide a pulp paper that improves the electrical and storage performance of carbon-zinc batteries, thereby solving the problems existing in the prior art.
[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A pulp paper for improving the electrical and storage performance of carbon-zinc batteries, the pulp paper comprising a base paper layer and a coating layer coated on both sides of the base paper; the coating layer comprises the following raw materials in the following mass percentages: 10%~15% polyvinyl alcohol, 30%~40% modified starch, 8%~12% polyacrylamide, 7%~8% phosphorus-nitrogen multifunctional flame retardant, and the balance being deionized water.
[0006] Furthermore, the method for preparing the pulp paper that improves the electrical and storage performance of carbon-zinc batteries is as follows: (1) Mix the intermediate, deionized water and N,N-dimethylformamide in a mass ratio of 1:(4~6):(8~10), add serine alcohol, adjust the pH to 4~5 with hydrochloric acid, heat to 60~70℃, stir for 3~4h, add phosphorus pentoxide, continue stirring for 2~3h at 78~82℃, evaporate under reduced pressure, wash with anhydrous ethanol, dry at 50~60℃ to constant weight, and obtain the phosphorus-nitrogen multifunctional flame retardant; (2) 2-hydroxymethylbenzimidazole and triethylamine were added to dichloromethane at a molar ratio of 1:1, which was 10 to 12 times the mass of 2-hydroxymethylbenzimidazole. Acryloyl chloride was added at a constant rate of 1 to 1.2 times the molar mass of 2-hydroxymethylbenzimidazole over 1 hour at 0 to 4 °C. After the addition was completed, the temperature was raised to room temperature and the mixture was stirred for 20 to 30 hours. The mixture was washed with saturated sodium bicarbonate solution, dried with anhydrous magnesium sulfate, filtered, and the filtrate was distilled under reduced pressure to obtain acrylate-based benzimidazole. (3) Mix pre-modified starch, deionized water, and N,N-dimethylformamide in a mass ratio of 1:(8~10):(10~12), stir at 70~80℃ for 10~20 min, cool to 40~50℃, add 0.2~0.3 times the mass of pre-modified starch of acrylate-based benzimidazole, continue stirring and reacting for 10~12 h, and vacuum dry at 50~60℃ to constant weight to obtain modified starch; (4) By mass percentage, polyvinyl alcohol 10%~15%, modified starch 30%~40%, polyacrylamide 8%~12%, phosphorus and nitrogen multifunctional flame retardant 7%~8%, and the remainder is deionized water; mix polyvinyl alcohol, modified starch, polyacrylamide, phosphorus and nitrogen multifunctional flame retardant and deionized water evenly to prepare a mixed coating; apply the mixed coating to both sides of the base paper, dry at 100~105℃, slit and rewind to obtain pulp paper that improves the electrical performance and storage performance of carbon batteries.
[0007] Further, the preparation method of the intermediate in step (1) is as follows: phenyl dichlorophosphate and acetone are mixed evenly at a mass ratio of 1:(10~12), heated to 45~55℃, dicyandiamide and triethylamine are added, the reaction is stirred for 10~12h, filtered, washed 3~5 times with anhydrous ethanol, and dried under vacuum at 50~60℃ for 10~12h to obtain the intermediate.
[0008] Furthermore, the molar ratio of phenyl dichlorophosphate, dicyandiamide, and triethylamine is 1:2:2.
[0009] Further, the molar ratio of the intermediate, serine alcohol, and phosphorus pentoxide in step (1) is 1:2:(2.5~3.5).
[0010] Furthermore, the chemical formula for the reaction process of the phosphorus-nitrogen multifunctional flame retardant in step (1) is as follows: .
[0011] Furthermore, the chemical formula for the reaction process of the acrylate-based benzimidazole in step (2) is as follows: .
[0012] Further, the preparation method of the pre-modified starch in step (3) is as follows: starch and deionized water are mixed evenly at a mass ratio of 1:(20~24), sonicated for 5~10 min, gelatinized at 80~90℃ for 30~40 min under nitrogen protection, cooled to 60~70℃, silane hydrolysate is added, pH is adjusted to 4~5 with acetic acid, the reaction is stirred for 3~4 h, cooled to room temperature, the product is precipitated with anhydrous ethanol, filtered, and vacuum dried at 50~60℃ to constant weight to obtain pre-modified starch.
[0013] Further, the preparation method of the silane hydrolysate is as follows: N-aminoethyl-γ-aminopropyltrimethoxysilane and deionized water are mixed evenly at a mass ratio of 1:(7~8), and stirred at 55~65℃ for 50~60 min to obtain the silane hydrolysate.
[0014] Furthermore, the mass ratio of starch to N-aminoethyl-γ-aminopropyltrimethoxysilane is 1:(0.06~0.08).
[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: First, this application prepares a phosphorus-nitrogen multifunctional flame retardant by reacting phenyl dichlorophosphate sequentially with dicyandiamide and phosphorus pentoxide. The phosphorus-nitrogen multifunctional flame retardant contains both phosphorus and nitrogen elements, which can exert a synergistic flame retardant effect, enhance the flame retardant ability of the pulp paper, and improve the safety performance of the battery. At the same time, the phosphorus-nitrogen multifunctional flame retardant contains multiple phosphate groups and amino groups, which can form a complex with zinc, adhere to the surface of the zinc negative electrode, form an anti-corrosion protective layer, prevent further corrosion of the zinc negative electrode, and thus improve the leakage resistance of the battery.
[0016] Second, acrylate-based benzimidazole is prepared by reacting 2-hydroxymethylbenzimidazole with acryloyl chloride; pre-modified starch is prepared by modifying starch with N-aminoethyl-γ-aminopropyltrimethoxysilane, and a large number of amino groups are introduced into the pre-modified starch. The amino groups on the pre-modified starch undergo Michael addition reaction with the acrylate groups on the acrylate-based benzimidazole to obtain modified starch. A large number of benzimidazole structures are grafted onto the modified starch. The benzimidazole molecule contains two adjacent nitrogen atoms and also has a conjugated large π bond, which allows it to form a stable coordination bond with the zinc anode surface through the nitrogen atoms in the molecular structure, and achieve dense adsorption through the planar bicyclic structure, thus constructing a dual physical and chemical protective layer and further improving the leakage resistance of the battery. Detailed Implementation
[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0018] Raw material information: Starch: Industrial grade corn starch; Polyvinyl alcohol: Industrial grade, PVC1788, Wuhan Jiyesheng Chemical Co., Ltd.; Polyacrylamide: Industrial grade, Shanghai Aladdin.
[0019] Example 1: A pulp paper for improving the electrical and storage performance of carbon-zinc batteries includes the following preparation steps: (1) Weigh phenyl dichlorophosphate, dicyandiamide, and triethylamine in a molar ratio of 1:2:2; mix phenyl dichlorophosphate and acetone in a mass ratio of 1:10, heat to 45°C, add dicyandiamide and triethylamine, continue stirring and react for 12 hours, filter, wash three times with anhydrous ethanol, and dry under vacuum at 50°C for 12 hours to obtain the intermediate; weigh the intermediate, serine, and phosphorus pentoxide in a molar ratio of 1:2:2.5; mix the intermediate, deionized water, and N,N-dimethylformamide in a mass ratio of 1:4:8, add serine, adjust the pH to 4 with hydrochloric acid, heat to 60°C, stir and react for 4 hours, add phosphorus pentoxide, continue stirring and reacting at 78°C for 3 hours, evaporate under reduced pressure, wash with anhydrous ethanol, and dry to constant weight at 50°C to obtain the phosphorus-nitrogen multifunctional flame retardant; (2) 2-hydroxymethylbenzimidazole and triethylamine were added to dichloromethane at a molar ratio of 1:1 to 10 times the mass of 2-hydroxymethylbenzimidazole. Acryloyl chloride was added at a constant rate at 0°C over 1 hour. After the addition was complete, the temperature was raised to room temperature and the reaction was stirred for 20 hours. The mixture was washed with saturated sodium bicarbonate solution, dried with anhydrous magnesium sulfate, filtered, and the filtrate was distilled under reduced pressure to obtain acrylate-based benzimidazole. (3) Weigh starch and N-aminoethyl-γ-aminopropyltrimethoxysilane at a mass ratio of 1:0.06; mix N-aminoethyl-γ-aminopropyltrimethoxysilane and deionized water at a mass ratio of 1:7, stir at 55℃ for 60 min to obtain silane hydrolysate; mix starch and deionized water at a mass ratio of 1:20, sonicate for 5 min, gelatinize at 80℃ for 40 min under nitrogen protection, cool to 60℃, add silane hydrolysate, and adjust with acetic acid. Adjust the pH to 4, stir the reaction for 4 hours, cool to room temperature, precipitate the product with anhydrous ethanol, filter, and vacuum dry at 50°C to constant weight to obtain pre-modified starch; mix the pre-modified starch, deionized water, and N,N-dimethylformamide in a mass ratio of 1:8:10, stir at 70°C for 20 minutes, cool to 40°C, add 0.2 times the mass of the pre-modified starch with acrylate-based benzimidazole, continue stirring the reaction for 12 hours, and vacuum dry at 50°C to constant weight to obtain modified starch; (4) By mass percentage, polyvinyl alcohol 10%, modified starch 35%, polyacrylamide 12%, phosphorus-nitrogen multifunctional flame retardant 8%, and the remainder is deionized water; polyvinyl alcohol, modified starch, polyacrylamide, phosphorus-nitrogen multifunctional flame retardant and deionized water are mixed evenly to prepare a mixed coating; the mixed coating is applied to both sides of the base paper, dried at 100°C, slit and rewound to obtain pulp paper that improves the electrical performance and storage performance of carbon batteries.
[0020] Example 2: A pulp paper for improving the electrical and storage performance of carbon-zinc batteries includes the following preparation steps: (1) Weigh phenyl dichlorophosphate, dicyandiamide, and triethylamine in a molar ratio of 1:2:2; mix phenyl dichlorophosphate and acetone in a mass ratio of 1:11, heat to 50°C, add dicyandiamide and triethylamine, continue stirring for 11 h, filter, wash 4 times with anhydrous ethanol, and vacuum dry at 55°C for 11 h to obtain the intermediate; weigh the intermediate, serine, and phosphorus pentoxide in a molar ratio of 1:2:3; mix the intermediate, deionized water, and N,N-dimethylformamide in a mass ratio of 1:5:9, add serine, adjust the pH to 4.5 with hydrochloric acid, heat to 65°C, stir for 3.5 h, add phosphorus pentoxide, continue stirring for 2.5 h at 80°C, evaporate under reduced pressure, wash with anhydrous ethanol, and dry at 55°C to constant weight to obtain the phosphorus-nitrogen multifunctional flame retardant; (2) 2-hydroxymethylbenzimidazole and triethylamine were added to dichloromethane at a molar ratio of 1:1 to 11 times the mass of 2-hydroxymethylbenzimidazole. Acryloyl chloride was added at a uniform rate of 1.1 times the molar mass of 2-hydroxymethylbenzimidazole over 1 hour at 2°C. After the addition was completed, the temperature was raised to room temperature and the reaction was stirred for 25 hours. The mixture was washed with saturated sodium bicarbonate solution, dried with anhydrous magnesium sulfate, filtered, and the filtrate was distilled under reduced pressure to obtain acrylate-based benzimidazole. (3) Weigh starch and N-aminoethyl-γ-aminopropyltrimethoxysilane at a mass ratio of 1:0.07; mix N-aminoethyl-γ-aminopropyltrimethoxysilane and deionized water at a mass ratio of 1:7.5, stir at 60℃ for 55 min to obtain silane hydrolysate; mix starch and deionized water at a mass ratio of 1:22, sonicate for 7.5 min, gelatinize at 85℃ for 35 min under nitrogen protection, cool to 65℃, add silane hydrolysate, and adjust with acetic acid. Adjust the pH to 4.5, stir the reaction for 3.5 h, cool to room temperature, precipitate the product with anhydrous ethanol, filter, and vacuum dry at 55 °C to constant weight to obtain pre-modified starch; mix the pre-modified starch, deionized water, and N,N-dimethylformamide in a mass ratio of 1:9:11, stir at 75 °C for 15 min, cool to 45 °C, add 0.25 times the mass of the pre-modified starch in acrylate-based benzimidazole, continue stirring the reaction for 11 h, and vacuum dry at 55 °C to constant weight to obtain modified starch; (4) By mass percentage, polyvinyl alcohol 12%, modified starch 35%, polyacrylamide 10%, phosphorus and nitrogen multifunctional flame retardant 8%, and the remainder is deionized water; polyvinyl alcohol, modified starch, polyacrylamide, phosphorus and nitrogen multifunctional flame retardant and deionized water are mixed evenly to prepare a mixed coating; the mixed coating is applied to both sides of the base paper, dried at 103°C, slit and rewound to obtain pulp paper that improves the electrical performance and storage performance of carbon batteries.
[0021] Example 3: A pulp paper for improving the electrical and storage performance of carbon-zinc batteries includes the following preparation steps: (1) Weigh phenyl dichlorophosphate, dicyandiamide, and triethylamine in a molar ratio of 1:2:2; mix phenyl dichlorophosphate and acetone in a mass ratio of 1:12, heat to 55°C, add dicyandiamide and triethylamine, continue stirring and react for 12 hours, filter, wash 5 times with anhydrous ethanol, and dry under vacuum at 60°C for 10 hours to obtain the intermediate; weigh the intermediate, serine, and phosphorus pentoxide in a molar ratio of 1:2:3.5; mix the intermediate, deionized water, and N,N-dimethylformamide in a mass ratio of 1:6:10, add serine, adjust the pH to 5 with hydrochloric acid, heat to 70°C, stir and react for 3 hours, add phosphorus pentoxide, continue stirring and reacting at 82°C for 2 hours, evaporate under reduced pressure, wash with anhydrous ethanol, and dry to constant weight at 60°C to obtain the phosphorus-nitrogen multifunctional flame retardant; (2) 2-hydroxymethylbenzimidazole and triethylamine were added to dichloromethane at a molar ratio of 1:1 to 12 times the mass of 2-hydroxymethylbenzimidazole. Acryloyl chloride was added at a uniform rate of 1.2 times the molar mass of 2-hydroxymethylbenzimidazole over 1 hour at 4°C. After the addition was completed, the temperature was raised to room temperature and the reaction was stirred for 30 hours. The mixture was washed with saturated sodium bicarbonate solution, dried with anhydrous magnesium sulfate, filtered, and the filtrate was distilled under reduced pressure to obtain acrylate-based benzimidazole. (3) Weigh starch and N-aminoethyl-γ-aminopropyltrimethoxysilane at a mass ratio of 1:0.08; mix N-aminoethyl-γ-aminopropyltrimethoxysilane and deionized water at a mass ratio of 1:8, stir at 65℃ for 50 min to obtain silane hydrolysate; mix starch and deionized water at a mass ratio of 1:24, sonicate for 10 min, gelatinize at 90℃ for 30 min under nitrogen protection, cool to 70℃, add silane hydrolysate, and adjust with acetic acid. Adjust the pH to 5, stir the reaction for 3 hours, cool to room temperature, precipitate the product with anhydrous ethanol, filter, and vacuum dry at 60°C to constant weight to obtain pre-modified starch; mix the pre-modified starch, deionized water, and N,N-dimethylformamide in a mass ratio of 1:10:12, stir at 80°C for 10 minutes, cool to 50°C, add 0.3 times the mass of the pre-modified starch of acrylate-based benzimidazole, continue stirring the reaction for 10 hours, and vacuum dry at 60°C to constant weight to obtain modified starch; (4) By mass percentage, polyvinyl alcohol 14%, modified starch 35%, polyacrylamide 8%, phosphorus-nitrogen multifunctional flame retardant 8%, and the remainder is deionized water; polyvinyl alcohol, modified starch, polyacrylamide, phosphorus-nitrogen multifunctional flame retardant and deionized water are mixed evenly to prepare a mixed coating; the mixed coating is applied to both sides of the base paper, dried at 105°C, slit and rewound to obtain pulp paper that improves the electrical performance and storage performance of carbon batteries.
[0022] Comparative Example 1: The difference between the pulp paper of Comparative Example 1, which improves the electrical and storage performance of carbon-zinc batteries, and Example 2 is that step (1) is omitted, and step (4) is modified as follows: by mass percentage, polyvinyl alcohol 12%, modified starch 35%, polyacrylamide 10%, and the balance is deionized water; polyvinyl alcohol, modified starch, polyacrylamide, and deionized water are mixed evenly to prepare a mixed coating; the mixed coating is applied to both sides of the base paper, dried at 103°C, slit, and rewound to obtain the pulp paper that improves the electrical and storage performance of carbon-zinc batteries. The remaining steps are the same as in Example 2.
[0023] Comparative Example 2: The difference between Comparative Example 2 and Example 2 is that steps (2) and (3) are omitted; in step (4), "starch" is used instead of "modified starch". The remaining steps are the same as in Example 2.
[0024] Performance testing: I. Leakage Resistance Test: The pulp paper prepared in the examples and comparative examples was used as the pulp paper for carbon-zinc batteries. Zinc-manganese batteries were assembled according to the national standard GB8897-2008-T, and the leakage resistance of the batteries was tested. Discharge method: 3.9Ω continuous discharge for 24 hours. The test results are shown in Table 1; Based on the experimental results in Table 1, it can be concluded that the leak-proof effect of Examples 1-3 is significantly better than that of Comparative Examples 1-2. This indicates that the phosphorus-nitrogen multifunctional flame retardant contains multiple phosphate groups and amino groups, which can form complexes with zinc, adhere to the surface of the zinc negative electrode, and form an anti-corrosion protective layer to prevent further corrosion of the zinc negative electrode, thereby improving the battery's leak-proof performance. Grafting a large number of benzimidazole structures onto modified starch, the benzimidazole molecule contains two adjacent nitrogen atoms and also has a conjugated large π bond, allowing it to form stable coordination bonds with the zinc negative electrode surface through the nitrogen atoms in its molecular structure. Furthermore, it achieves dense adsorption through a planar bicyclic structure, constructing a dual physical and chemical protective layer, further improving the battery's leak-proof performance.
[0025] II. Flame retardant performance test: The mixed coatings prepared in the examples and comparative examples were poured into a polytetrafluoroethylene mold and dried at 100°C to constant weight to make a sample with dimensions of 150mm×6.5mm×4mm; the test results are shown in Table 2 according to the limiting oxygen index of the test strip of the national standard GB / T 2406. Analysis of the experimental data in Table 2 shows that the limiting oxygen index of Examples 1-3 is significantly greater than that of Comparative Example 1, indicating that the phosphorus-nitrogen multifunctional flame retardant prepared in this application can significantly improve the flame retardant ability of the material. The limiting oxygen index of Examples 1-3 is greater than that of Comparative Example 2. The reason is that the large amount of benzimidazole grafted onto the modified starch contains nitrogen and benzene rings, which can further improve the flame retardant effect.
[0026] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
Claims
1. A pulp paper for improving the electrical and storage performance of carbon-zinc batteries, characterized in that, The pulp paper for improving the electrical and storage performance of carbon-zinc batteries includes a base paper layer and a coating layer applied to both sides of the base paper; the coating layer includes the following raw materials by mass percentage: 10%~15% polyvinyl alcohol, 30%~40% modified starch, 8%~12% polyacrylamide, 7%~8% phosphorus-nitrogen multifunctional flame retardant, and the balance being deionized water.
2. The pulp paper for improving the electrical and storage performance of carbon-zinc batteries as described in claim 1, characterized in that, The method for preparing the pulp paper that improves the electrical and storage performance of carbon-zinc batteries is as follows: (1) Mix the intermediate, deionized water and N,N-dimethylformamide evenly, add serine alcohol, adjust the pH to 4-5 with hydrochloric acid, heat to 60-70℃, stir for 3-4 hours, add phosphorus pentoxide, continue stirring for 2-3 hours at 78-82℃, evaporate under reduced pressure, wash, dry to constant weight, and obtain phosphorus-nitrogen multifunctional flame retardant; (2) 2-hydroxymethylbenzimidazole and triethylamine were added to dichloromethane. Acryloyl chloride was added at a constant rate over 1 hour at 0-4°C. After the addition was complete, the temperature was raised to room temperature and the mixture was stirred for 20-30 hours. The mixture was washed, dried with anhydrous magnesium sulfate, filtered, and the filtrate was distilled under reduced pressure to obtain acrylate-based benzimidazole. (3) Mix pre-modified starch, deionized water and N,N-dimethylformamide, stir at 70~80℃ for 10~20min, cool down to 40~50℃, add 0.2~0.3 times the mass of pre-modified starch of acrylate-based benzimidazole, continue stirring and reacting for 10~12h, dry, and obtain modified starch; (4) By mass percentage, polyvinyl alcohol 10%~15%, modified starch 30%~40%, polyacrylamide 8%~12%, phosphorus and nitrogen multifunctional flame retardant 7%~8%, and the remainder is deionized water; mix polyvinyl alcohol, modified starch, polyacrylamide, phosphorus and nitrogen multifunctional flame retardant and deionized water evenly to prepare a mixed coating; apply the mixed coating to both sides of the base paper, dry, cut and rewind to obtain pulp paper that improves the electrical performance and storage performance of carbon batteries.
3. The pulp paper for improving the electrical and storage performance of carbon-zinc batteries as described in claim 2, characterized in that, The preparation method of the intermediate in step (1) is as follows: phenyl dichlorophosphate and acetone are mixed evenly, heated to 45~55℃, dicyandiamide and triethylamine are added, and the reaction is continued to be stirred for 10~12h. The mixture is then filtered, washed, and dried to obtain the intermediate.
4. The pulp paper for improving the electrical and storage performance of carbon-zinc batteries as described in claim 3, characterized in that, The molar ratio of phenyl dichlorophosphate, dicyandiamide, and triethylamine is 1:2:
2.
5. The pulp paper for improving the electrical and storage performance of carbon-zinc batteries as described in claim 2, characterized in that, The molar ratio of the intermediate, serine alcohol, and phosphorus pentoxide in step (1) is 1:2:(2.5~3.5).
6. The pulp paper for improving the electrical and storage performance of carbon-zinc batteries as described in claim 2, characterized in that, The chemical formula for the reaction of acrylate-based benzimidazole in step (2) is as follows: 。 7. The pulp paper for improving the electrical and storage performance of carbon-zinc batteries as described in claim 2, characterized in that, The preparation method of the pre-modified starch in step (3) is as follows: mix starch and deionized water evenly, sonicate, gelatinize at 80~90℃ for 30~40min under nitrogen protection, cool down to 60~70℃, add silane hydrolysate, adjust pH to 4~5 with acetic acid, stir and react for 3~4h, cool down to room temperature, precipitate the product with anhydrous ethanol, filter, dry, and obtain pre-modified starch.
8. The pulp paper for improving the electrical and storage performance of carbon-zinc batteries as described in claim 7, characterized in that, The method for preparing the silane hydrolysate is as follows: N-aminoethyl-γ-aminopropyltrimethoxysilane and deionized water are mixed evenly and stirred at 55~65℃ for 50~60 min to obtain the silane hydrolysate.
9. The pulp paper for improving the electrical and storage properties of carbon-zinc batteries as described in claim 7 or 8, characterized in that, The mass ratio of starch to N-aminoethyl-γ-aminopropyltrimethoxysilane is 1:(0.06~0.08).