40results about How to "Reduce Sulfation" patented technology

The invention relates to a lead-carbon battery anode. The lead-carbon battery anode is prepared from following raw materials parts by weight: 100 parts of lead powder, 4-100 parts of sulfuric acid, 0.1-8 parts of a binder, 0.1-2 parts of barium sulfate, 0.01-2 parts of a hydrogen evolution inhibitor, 1-10 parts of graphene, 1-4 parts of humic acid, 5-15 parts of red lead, 12-21 parts of water and 0.1-0.2 part of short fiber. The invention also relates to a preparation method and applications of the lead-carbon battery anode. According to the lead-carbon battery anode, the graphene is introduced into the anode material and replaces active carbon and a conductive agent in lead-carbon batteries at present, and therefore the graphene can effectively take a share in a part of current in the lead anode under large-current charge-discharge conditions. The specific power of a battery prepared by the lead-carbon battery anode is 50% higher that of a common lead-acid battery. In large-current pulse charge-discharge cycles, the service lifetime of the battery prepared by the lead-carbon battery anode is prolonged by 10 times of that of the common lead-acid battery. Sulfation of a storage battery is largely delayed. The service lifetime of the storage battery in partial charge state working conditions is prolonged.

The invention discloses a storage battery electrolyte and a storage battery. The storage battery electrolyte comprises sulfuric acid, potassium sulfate, ammonium sulfate, magnesium sulfate, 4,5-diethylvinylene carbonate, 4-methyl-5-propylvinylene carbonate, propylene sulfite, methyl tert-butyl ether, polyvinyl alcohol, sodium ethylene diamine tetracetate, sulfone additives, trisodium 2,4,6-trithio-s-triazine solution and deionized water. The storage battery electrolyte is used for overcoming the shortages of the prior art, and capable of remarkably increasing the cycle time of the storage battery and prolonging the service life of the storage battery; meanwhile, the storage battery is good in stability and easy to popularize and use.

The invention specifically relates to a flat-plate type sulfur-resistant low-temperature SCR denitration catalyst and a preparation method thereof, belonging to the fields of environmental protection and environmental catalysis. The method comprises the following steps: with nanometer composite oxide Ce-ZrO2 as a carrier, manganese oxide as an active component and iron oxide and molybdenum oxide as cocatalysts, carrying out equivalent-volume impregnation, drying, roasting and crushing so as to prepare a powdery catalyst; and subjecting the prepared powdery catalyst to acidification by sulfuric acid and then carrying out mixing, rolling coating, fold pressing, shearing, drying and roasting so as to obtain the flat-plate type sulfur-resistant low-temperature SCR denitration catalyst. The prepared catalyst has denitration activity of 85 to 98% in a temperature range of 80 to 150 DEG C and has excellent resistance to sulfur dioxide poisoning.

The invention provides a graphene composite electrode material. The graphene composite electrode material comprises nitrogen-doped graphene and lead sulfate adsorbed between nitrogen-doped graphene sheet layers; the mass ratio of the nitrogen-doped graphene to the lead sulfate is 1:(10-20). When the graphene composite electrode material is applied to a negative electrode of a lead-carbon battery, the nitrogen-doped graphene is a non-polarity material and can be well compatible with electrolyte-sulfuric acid of the lead-carbon battery, so that reduction of the electrochemical polarization of the negative electrode is facilitated. The interlayer spacing of the nitrogen-doped graphene is large so that the specific surface area is large and the nitrogen-doped graphene is suitable for being used as a growing point of a lead sulfate crystalline grain under a large-power condition; the sulfation of the negative electrode under the large-power condition is reduced so that the cycle life of the negative electrode is prolonged and the cycle performance of the lead-carbon battery is improved. The invention further provides a preparation method of the graphene composite electrode material, lead-carbon battery negative electrode lead plaster and a preparation method thereof, and the lead-carbon battery.

The invention belongs to the technical field of lead storage batteries and relates to a negative electrode diachylon which is capable of improving dynamic charging acceptance performance of an AGM battery and a preparing method thereof. The negative electrode diachylon is capable of improving the dynamic charging acceptance performance of the AGM battery under the condition that the AGM battery has the advantages of being long in service life and strong in starting capacity, the probability of sulfation of a negative plate when the negative plate is in a partial charge state for a long time is reduced, and then starting and shut-down requirements are met.

The invention relates to an electrolyte for a lead-acid accumulator, in particular to a colloidal electrolyte and a preparation method thereof. The invention adopts the following technical scheme that the colloidal electrolyte is prepared from the following components in percentage by weight: 0.3 to 1.0 percent of silicon dioxide, 0.05 to 0.25 percent of cobaltous sulphate, 0.5 to 1.0 percent of sodium sulphide, 0.05 to 0.5 percent of stannous sulfate, 92 to 95 percent of dilute sulphuric acid of which the density is 1.330 to 1.400g/cm<3> and the balance of water of which the pH value is 7 to 9.

The invention relates to a lead-carbon battery composite negative electrode additive and a preparation method thereof, wherein the lead-carbon battery composite negative electrode additive is formed by coating the surface of a reduced graphene oxide lamella with a metal element modified porous carbon material, and contains 0.1-50 wt% of reduced graphene oxide, 40-90 wt% of porous carbon, and 0.1-10 wt% of a metal element. According to the present invention, the lead-carbon battery composite negative electrode additive has high specific surface area and high electronic conductivity; and by doping the lead-carbon battery composite negative electrode additive into a lead-acid battery negative electrode, the lead-carbon battery negative electrode with characteristics of high activity, high charge-discharge reversibility and low hydrogen evolution can be obtained.

The invention provides a new type of lead-carbon battery for electric vehicles. The positive pole is a PbO2 positive pole, and the negative pole is coated with a porous activated carbon material on the lead current collector. The composition and proportion (weight) of the porous activated carbon material are: activated carbon 55 ~95%, conductive agent 5~30%, binder 0.1~15%, the positive electrode is wrapped with a separator, and the negative electrode is immersed in the H2SO4 electrolyte with a concentration of 1.0~2.0mol/L. The lead-carbon battery of the present invention has the advantages of large capacity, long life and low price, especially its high-current and low-temperature performance, good charge acceptance, reduced lead consumption, and environmental friendliness, and is suitable for the use of electric vehicles that are increasingly developed Require.

The invention relates to a lead-acid storage battery electrolyte additive which contains s-triazine, sulfate, stannous mono-sulphate and ethylenediamine tetraacetic acid disodium, wherein each liter of lead-acid storage battery electrolyte contains 1,500-2,000mg/L of s-triazine, 1,000-1,200mg/L of sulfate, 1,500-2,000mg/L of stannous mono-sulphate, 3,000-6,000mg/L of ethylenediamine tetraacetic acid disodium and the balance of a sulfuric acid solution. The s-triazine and sulfuric acid are mixed according to a certain ratio to form a sulfuric acid electrolyte additive; due to the ligand mixing working mechanism of the s-triazine, the sulfation of a lead-acid storage battery polar plate is reduced, the electrochemical performance of a battery is improved, and the cycle service life of the battery is prolonged.

The invention discloses a preparation method of a high-power external application type lead-carbon battery negative electrode. The negative electrode consists of three parts, namely, lead plaster, a carbon plate and gel. The structure that the carbon plate is attached to the surface of the lead plaster can improve electrode potential distribution, inhibit surface sulfation and improve the effective utilization rate of active substances. When lead ions in an electrolyte contact with the carbon plate of the negative electrode, lead and lead sulfate oxidation-reduction circulation occurs on the surface of the carbon plate under the electrochemical action, sulfation is generated, and the power density and the cycling stability of the electrode are reduced. The gel can inhibit lead ions from contacting the surface of the carbon material, avoid reduction of the lead ions, inhibit sulfation of the surface of the carbon material, ensure normal exertion of beneficial effects of the carbon material, improve the charge-discharge efficiency of the electrode and prolong the cycle service life of the electrode. The external application type lead-carbon battery composed of the negative electrodehas higher large-current bearing capacity and cycling stability, and is suitable for the fields of start-stop automobiles, solar energy, wind energy storage and the like.

The invention discloses a storage battery electrolyte and a storage battery, comprising sulfuric acid, stannous sulfate, ammonium sulfate, sodium sulfate, 4,5-diethyl vinylene carbonate, 4-methyl-5- propyl vinylene carbonate, cyclohexyl-benzene, anisole, modified polyacrylamide, EDTA disodium, 2,6-di-tert-butyl-4-methylphenol, 1(H)-2-p-chlorobenzyl benzimidazole, sulfones additive, 1,3,5-triazine-2,4,6-trithiol trisodium salt solution, nanoscale silicon dioxide and deionized water. The invention can solve the deficiency of the prior art and can remarkably improve the using times and service life of the storage battery; simultaneously the storage battery is good in stability and easy in popularization and use.

Disclosed is metal element-doped and carbon-coated lead powder used as a negative electrode material of a lead-carbon battery. The lead powder is characterized in that the surfaces of lead oxide granules which constitute the lead power are coated with metal element-containing carbon; the preparation method for the lead powder comprises the steps of adding a metal element soluble salt solution which is used as a hydrogen evolution inhibitor into a complexing agent solution firstly, and mixing uniformly; after metal ions and the complexing agent are fully reacted to form a metal ion complex solution, adding lead powder into the complex solution to be fully stirred, and performing heating to remove water content to enable the surfaces of the lead powder granules to be coated with the complex; and finally, performing carbonization treatment on the product in inert gas to obtain the metal element-doped and carbon-coated lead powder. The method is characterized in that carbon coating on the lead powder and hydrogen evolution inhibition modification of the coated carbon are realized through in-situ composite in one time; and the negative electrode material, which is compounded by the metal element-doped and carbon-coated lead powder, of the lead-carbon battery has high electrochemical performance.

A battery electrode assembly comprises a porous electrode plate having a plurality of large and small pores, a pore insert within a plurality of pores, the pore insert maintaining an electrolyte in the pores substantially throughout a discharge/charge cycle. The pore insert may be a gelled electrolyte. The pore insert may be a particulate material. The electrodes may be used in a battery having cells with opposing positive and negative tabs connected in series by an intercell connector.

Low temperature-resistant high-rate AGM start-stop battery anode lead plaster and a preparation method thereof. The lead plaster includes: 83-85% of lead powder, 7-7.5% of a sulfuric acid solution, 6-8.5% of water, 0.04-0.08% of short fibers, 0.17-0.34% of a carbon material, 0.6-0.85% of BaSO4, and 0.15-0.65% of a composite additive. The anode lead plaster can improve dynamic receiving feature andcycle performance of an AGM start-stop battery on the basis of the advantages of long service life and durable cycle performance of the AGM battery assembled with the lead plaster, thereby greatly improving the comprehensive performance of the battery. The lead plaster can satisfy high-rate, long-life and charge/discharge performances of an automobile under partial charge status during start andstop, especially a brake energy recovery function for the automobile, thus reducing sulfation of interior of the battery and improving charge receiving capacity. The lead plaster greatly improves low-temperature start capability of the AGM storage battery and increasing cold-start power and improving the charge receiving capacity of the battery.

The invention relates to a preparation process of a battery pole plate of a lead-acid battery with high cycle performance, the battery pole plate of the lead-acid battery comprises a positive pole plate and a negative pole plate, the preparation process of the positive pole plate comprises the following steps: step 1, preparing raw materials of the positive pole plate, including 0.07-0.10 part of calcium, 0.004-0.025 part of lanthanum, 1.4-1.5 parts of tin, 0.015-0.025 part of aluminum, 0.002-0.0025 part of silver and the balance of lead powder; 2, preparing a lanthanum-tin master alloy, wherein the lanthanum-tin master alloy comprises 20% by weight of lanthanum and 80% by weight of tin; step 3, preparing a calcium-aluminum master alloy; step 4, preparing a positive plate, adding lead powder into a smelting furnace, heating to melt, then sequentially adding the calcium-aluminum master alloy, the lanthanum-tin master alloy and the residual tin, and uniformly stirring to obtain a positive plate alloy; and preparing the positive plate alloy into the positive plate. The positive plate battery plate prepared by the invention has good corrosion resistance and high mechanical strength.