3results about How to "Increase cycle ratio" patented technology

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.

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.