8results about How to "Increase cycle ratio" patented technology

The present application relates to the field of battery technology, and in particular to a positive electrode slurry of a Prussian blue compound, a preparation method thereof, and a positive electrode sheet. The preparation method of the positive electrode slurry of the Prussian blue compound comprises the following steps: obtaining a Prussian blue compound solution with a solid content of 10% to 80% by a coprecipitation method; placing the Prussian blue compound solution, a binder, a conductive agent, and an optional thickener in a solvent and mixing them evenly to obtain a positive electrode slurry of the Prussian blue compound. This method solves the problem that the dry powder of the Prussian blue compound is difficult to disperse into the slurry, thereby improving the capacity and initial efficiency of the battery prepared by the positive electrode slurry prepared by the method.

The invention discloses a high-heat-resistance and high-infiltration lithium battery diaphragm and a preparation method thereof, the high-heat-resistance and high-infiltration lithium battery diaphragm comprises a base membrane and a coating on the base membrane, the coating is obtained by coating slurry, the slurry comprises flaky wollastonite fibers, a silane coupling agent, an adhesive and a dispersing agent, and the silane coupling agent is vinyltriethoxysilane. The width of the flaky wollastonite fiber is less than 1.5 mu m, the length is 2.0-7.0 mu m, and the thickness is 0.1-0.5 mu m. The high-heat-resistance and high-infiltration lithium battery diaphragm disclosed by the invention has excellent heat resistance and wettability, relatively high breakdown voltage and relatively low water content.

The invention discloses a high cycle rate diaphragm and a preparation method thereof, comprising the following steps: step 1, firstly stirring and blending a dispersant and pure water, then adding alumina powder and stirring and blending for a second time to obtain a mixed solution, and simultaneously performing ultrasound during the second stirring and blending process, adding isopropyl alcohol, CMC, PMMA and a wetting agent to the mixed solution after the second stirring, stirring and blending by vacuum oscillation, and preparing a coating slurry; step 2, coating the coating slurry obtained in step 1 on a base film to obtain a coating film; step 3, drying the coating film obtained in step 2 to obtain a high cycle rate diaphragm; the invention improves the adhesion of the diaphragm coating and the battery cycle rate by introducing PMMA, and in addition, alumina and PMMA synergistically play a role in improving the ionic conductivity of the diaphragm.

The application discloses a kind of composite positive plate and lithium ion battery and preparation method.The composite positive plate includes positive current collector;Positive current collector surface is coated with positive active material layer;Positive active material layer surface is coated with solid electrolyte layer;Positive active material layer includes positive active material, oxide solid electrolyte, conductive agent, dispersing agent and binder and the mass ratio of these components is (91.9%~97.45%): (0.5%~5%): (1%~1.5%): (0.05%~0.1%): (1%~1.5%);Solid electrolyte layer includes oxide solid electrolyte, conductive agent, dispersing agent and binder and the mass ratio of these components is (13.9%~70.9%): (13.2%~49.2%): (0.6%~3.8%): (13.2%~49.2%);The application is conducive to guaranteeing battery thermal safety while significantly improving battery fast-charging capability.

The application discloses a carbon dioxide hydrogenation system for synthesizing methane, which is suitable for hydrogen source fluctuation, and solves the technical problems of the existing methanation reaction system, such as large equipment investment, large floor area and potential safety hazards caused by the hydrogen storage buffer device for suppressing hydrogen source fluctuation. The system comprises a raw material supply unit, a preheating unit, a reaction unit, a waste heat recovery unit, a cooling and separation unit, a circulation unit and a control unit. The hydrogen feeding pipeline of the raw material supply unit is provided with a flow detection device. The raw material preheater of the preheating unit performs primary preheating on the mixed raw material gas, and an electric heater performs secondary heat supplement. The reaction unit comprises a primary adiabatic reactor and a secondary adiabatic reactor. The waste heat recovery unit comprises a primary steam generator and a secondary steam generator. The total outlet pipeline connected with the gas phase outlet of the water separator of the cooling and separation unit is divided into an external delivery pipeline and a circulation pipeline. The control unit takes fresh hydrogen flow as a feedforward variable to perform collaborative adjustment.

The invention discloses a lithium battery diaphragm with low moisture and high circulation rate and a preparation method thereof, the lithium battery diaphragm comprises a base membrane and a coating on the base membrane, and the coating comprises polycrystalline mullite whiskers, barium sulfate and a binder. A staggered 3D network structure is generated between the barium sulfate and the polycrystal mullite whiskers, the polycrystal mullite whiskers can be interspersed among the barium sulfate, based on the network structure, water is more easily volatilized during diaphragm preparation, the water content of the diaphragm is reduced, the barium sulfate and the polycrystal mullite whiskers jointly adjust the porosity and pore size distribution of the diaphragm, and the diaphragm is more stable in performance. According to the present invention, the polycrystalline mullite crystal whiskers are added to form the ion moving channel so as to allow the ions in the electrolyte to pass through, such that the current blocking purpose is achieved, the battery use safety is ensured, the polycrystalline mullite crystal whiskers improve the ion conductivity of the diaphragm, the current density is increased, and the local overheating caused by the non-uniform current density is avoided.

This invention discloses a method for preparing a high-wetting-strength, high-adhesion lithium-ion battery separator. The high-wetting-strength, high-adhesion coating slurry comprises: polyethylene wax powder, alumina, adhesive, dispersant, and isopropanol. This invention modifies the separator surface with a mixture of polyethylene wax powder and alumina, giving the separator good heat resistance. The polyethylene wax powder solution coats the alumina surface and penetrates into the pores between the alumina particles, weakening the cohesive force and making the alumina easier to open under applied shear force. This makes the combined coating powder easier to wet with electrolyte, increasing the separator's liquid absorption and cycle rate. Simultaneously, the high-wetting-strength, high-adhesion coating slurry made from polyethylene wax powder provides more uniform coating, reduces slurry viscosity, improves surface tension, and enhances material adsorption, increasing the adhesion between the separator and the electrode.

The invention provides a low-ash-content fire coal combustion process and device for lifting a circulating fluidized bed boiler, and the process comprises the following steps: S1, conveying fire coal into a hearth of the circulating fluidized bed boiler through a conveyor for combustion, conveying slag at the bottom of the circulating fluidized bed boiler to a feeding hole of a bucket elevator through a slag cooler and a scraper machine after combustion, and feeding the slag into a furnace; then, the slag is divided into two paths by an electric tee joint, one path of slag enters a slag bin through a discharging articulated chute I, and the other path of slag passes through a discharging articulated chute II, then sequentially passes through a large-dip-angle conveyor and a belt conveyor to be conveyed to a level gage and then enters a surge bin; and S2, the furnace slag is divided into furnace slag I and furnace slag II through a discharging pipe I and a discharging pipe II at the bottom of the surge bin, and the furnace slag I and the furnace slag II enter a hearth of the circulating fluidized bed boiler. The device is designed when the ash content in the fire coal of the circulating fluidized bed boiler is 5.8-6.0%, the bed temperature of the boiler can be effectively reduced during fire coal combustion, the boiler is made to operate at the temperature of 850-950 DEG C, the risks of high-temperature shutdown and high-temperature coking are avoided, and meanwhile energy can be saved.