2results about How to "No collapse" patented technology

The application relates to the technical field of catalyst preparation, in particular to a kind of organic solvent-resistant recyclable supported palladium catalyst and its preparation method and application, which comprises carrier and the palladium active component supported on the surface and in the channel of the carrier, the carrier is the modified mesoporous metal oxide-activated carbon composite carrier resistant to organic solvent, the palladium active component is palladium complex, the loading amount of the palladium active component is 0.5%-5% of the mass of the carrier;The modified mesoporous metal oxide-activated carbon composite carrier is composed of mesoporous metal oxide and activated carbon after modification by silane coupling agent, and the mesoporous metal oxide is one or more of mesoporous titanium dioxide, mesoporous aluminum oxide and mesoporous zirconium oxide;Solve the problem that homogeneous palladium catalyst used in suzuki-miyaura coupling reaction in the prior art cannot be recycled, the cost is high, the product purity is affected, and the existing supported palladium catalyst has poor organic solvent resistance, low catalytic activity and poor recycling stability.

The application provides a non-fluorine-coated diaphragm, a preparation method thereof, and a secondary battery. The non-fluorine-coated diaphragm comprises a base film and a composite coating layer coated on at least one side of the base film. The composite coating layer comprises a first coating layer and a second coating layer, and the first coating layer is arranged between the second coating layer and the base film. The first coating layer comprises first inorganic particles and second inorganic particles. The second coating layer comprises third inorganic particles and polymer particles. The polymer particles are non-fluorine polymers. The lower surface of the polymer particles is tangent to the first coating layer, and the polymer particles are filled in the second coating layer. When the temperature in the battery cell rises, the non-fluorine-coated diaphragm can effectively block the charging and discharging of the battery cell. When the temperature in the battery cell returns to normal, the swelling of the polymer particles decreases, the coverage of the polymer particles in the composite coating layer decreases, and the battery cell can operate normally again. The non-fluorine-coated diaphragm does not deteriorate the internal resistance and cycle performance of the battery cell, and simultaneously improves the heat resistance of the non-fluorine-coated diaphragm at high temperatures.