Abstract: A support stand for photography includes a support main body having supporting ends and a mounting end and an adapting device provided at the mounting end. The supporting ends are formed on supporting legs of the support main body. The supporting legs can be unfolded to allow two adjacent supporting ends to move away from each other. The supporting legs can be folded to allow the two adjacent supporting ends to move close to each other and form a gap between two adjacent supporting legs. The adapting device includes a fixed seat provided with an adapting structure for mounting a first photographic equipment and a clamping seat configured to clamp a second photographic equipment. The clamping seat is rotatably connected to the fixed seat. The clamping seat can rotate toward a side where the supporting ends are located to be accommodated in the gap between the two adjacent supporting legs.

Abstract: A battery includes a first base separator and a second base separator that are located on two sides of an electrode plate and that are adjacent to each other, and a first-type separator coating layer that is adhered to an edge region of the first base separator and an edge region of the second base separator. Another battery includes a second-type separator coating layer adhered to a middle region of a base separator, and a third-type separator coating layer adhered to an edge region of a first base separator, where the second-type separator coating layer includes an adhesive polymer with a first mass content, the third-type separator coating layer includes an adhesive polymer with a second mass content, and the second mass content is greater than the first mass content.

Abstract: An energy storage device includes a separator, the separator includes a porous substrate, and a porous layer arranged on a surface of the porous substrate. The porous layer comprises inorganic particles and a binder, and a ratio of Dv90 of the inorganic particles to the thickness of the porous layer is in a range from 0.3 to 3.0. Excellent adhesion exists between the separator and the electrode according to the present application, which ensures that the energy storage device has good safety performance. Moreover, the rate performance and cycle performance of the energy storage device can be greatly improved due to the existence of inorganic particles in the separator.

Abstract: A porous film, including a binder and inorganic particles. The porous film includes pores formed by the binder. The pores at least include a part of the inorganic particles. The inorganic particles have particle sizes that Dv10 is in a range of 0.015 ?m to 3 ?m, Dv50 is in a range of 0.2 ?m to 5 ?m, and Dv90 is in a range of 1 ?m to 10 ?m. Dv10 of the inorganic particles is less than Dv50 of the inorganic particles, and Dv50 of the inorganic particles is less than Dv90 of the inorganic particles, and the inorganic particles have particle sizes that the ratio of Dv90 to Dv10 is in a range of 2 to 100.

Abstract: Embodiments of this application provide a battery separator, including a polyolefin-based porous separator, where the polyolefin-based porous separator includes polyethylene resin, an elongation rate of the polyolefin-based porous separator in an MD direction is greater than 120%, an elongation rate in a TD direction is greater than 120%, and for the polyolefin-based porous separator, crystallinity at a first-time temperature rise of polyethylene that is measured by using a differential scanning calorimeter is less than 65%, crystallinity at a second-time temperature rise is less than 55%, and a difference between the crystallinity at the first-time temperature rise and the crystallinity at the second-time temperature rise is less than 12%. The battery separator features a high elongation rate and a low temperature of closing a pore.

Abstract: A separator includes a porous substrate, and a porous layer arranged on a surface of the porous substrate. The porous layer comprises inorganic particles and a binder, and a ratio of Dv90 of the inorganic particles to the thickness of the porous layer is in a range from 0.3 to 3.0. Excellent adhesion exists between the separator and the electrode according to the present application, which ensures that the energy storage device has good safety performance. Moreover, the rate performance and cycle performance of the energy storage device can be greatly improved due to the existence of inorganic particles in the separator.

Abstract: The application provides a separator and an energy storage device. The separator comprises: a porous substrate; and a porous layer arranged on a surface of the porous substrate, wherein the porous layer comprises inorganic particles and a binder, and a ratio of Dv90 of the inorganic particles to the thickness of the porous layer is in a range from 0.3 to 3.0. Excellent adhesion exists between the separator and the electrode according to the present application, which ensures that the energy storage device has good safety performance. Moreover, the rate performance and cycle performance of the energy storage device can be greatly improved due to the existence of inorganic particles in the separator.

Abstract: A porous film, including a binder and inorganic particles. The porous film includes pores formed by the binder. The pores at least include a part of the inorganic particles. The inorganic particles have particle sizes that Dv10 is in a range of 0.015 ?m to 3 ?m, Dv50 is in a range of 0.2 ?m to 5 ?m, and Dv90 is in a range of 1 ?m to 10 ?m. Dv10 of the inorganic particles is less than Dv50 of the inorganic particles, and Dv50 of the inorganic particles is less than Dv90 of the inorganic particles, and the inorganic particles have particle sizes that the ratio of Dv90 to Dv10 is in a range of 2 to 100.

Abstract: The application provides a porous film and a lithium-ion battery. The porous film according to the present application has excellent adhesion, and the pore structure of the porous film can still be well maintained after being immersed in the electrolyte, thereby reducing the probability of pore blockage of the porous film and allowing the lithium-ion battery to have high ionic conductivity. Therefore, the rate performance of the lithium-ion battery is greatly improved, and the lithium-ion battery provided has excellent rate performance and cycle performance.

Abstract: The application provides a separator and an energy storage device. The separator comprises: a porous substrate; and a porous layer arranged on a surface of the porous substrate, wherein the porous layer comprises inorganic particles and a binder, and a ratio of Dv90 of the inorganic particles to the thickness of the porous layer is in a range from 0.3 to 3.0. Excellent adhesion exists between the separator and the electrode according to the present application, which ensures that the energy storage device has good safety performance. Moreover, the rate performance and cycle performance of the energy storage device can be greatly improved due to the existence of inorganic particles in the separator.

Abstract: The application provides a porous film and a lithium-ion battery. The porous film according to the present application has excellent adhesion, and the pore structure of the porous film can still be well maintained after being immersed in the electrolyte, thereby reducing the probability of pore blockage of the porous film and allowing the lithium-ion battery to have high ionic conductivity. Therefore, the rate performance of the lithium-ion battery is greatly improved, and the lithium-ion battery provided has excellent rate performance and cycle performance.

Abstract: A method for preparing p-xylene and co-producing propylene with a high selectivity, comprising: a) bringing a raw material containing toluene and methanol and/or dimethyl ether into contact with a catalyst in a reaction system for reaction; returning an ethylene-enriched C2? component discharged from the reaction system to the reaction system, and continuing the reaction with the raw material on the catalyst to produce propylene; b) separating a C6+ component discharged from the reaction system to obtain a product p-xylene; and c) separating a C3 component discharged from the reaction system to obtain a product propylene.

Abstract: A method for preparing p-xylene and co-producing propylene with a high selectivity, comprising: a) bringing a raw material containing toluene and methanol and/or dimethyl ether into contact with a catalyst in a reaction system for reaction; returning an ethylene-enriched C2? component discharged from the reaction system to the reaction system, and continuing the reaction with the raw material on the catalyst to produce propylene; b) separating a C6+ component discharged from the reaction system to obtain a product p-xylene; and c) separating a C3 component discharged from the reaction system to obtain a product propylene.

Abstract: The present disclosure relates to a separator of a lithium-ion battery and a preparation method thereof, the separator comprises a substrate membrane and a coating provided on a surface of the substrate membrane, the coating comprises ceramic particles, an adhesive and a solid polymer wax which has a melting point of 85˜120° C., a molecular weight of 1,000˜25,000 and a particle size of 0.5˜10 ?m. When the lithium-ion battery is heated due to overcharge and the like to make the interior temperature reach the melting point of the solid polymer wax, the solid polymer wax can be melt and enter among the ceramic particles and into the micropores of the substrate membrane by capillarity so as to function as electrical disconnection, which can effectively cut off the channel of the lithium ions and stop the overcharge, and ensure the safety performance of the lithium-ion battery under the situation of overcharge.

Abstract: The present invention belongs to the technical field of lithium ion batteries and in particular relates to a gel polymer lithium ion battery comprising a gel polymer electrolyte, a cathode, an anode and a separator spaced between the cathode and the anode, wherein the gel polymer electrolyte includes lithium salt, a non-aqueous solvent and a polymer monomer which includes at least one epoxy monomer containing an epoxy group and a double bond and at least one acrylate monomer, and an anode binder includes a polymer having an amino group or imino group on the main chain or a branched chain thereof.

Abstract: The present disclosure relates to a separator of a lithium-ion battery and a preparation method thereof, the separator comprises a substrate membrane and a coating provided on a surface of the substrate membrane, the coating comprises ceramic particles, an adhesive and a solid polymer wax which has a melting point of 85˜120° C., a molecular weight of 1,000˜25,000 and a particle size of 0.5˜10 ?m. When the lithium-ion battery is heated due to overcharge and the like to make the interior temperature reach the melting point of the solid polymer wax, the solid polymer wax can be melt and enter among the ceramic particles and into the micropores of the substrate membrane by capillarity so as to function as electrical disconnection, which can effectively cut off the channel of the lithium ions and stop the overcharge, and ensure the safety performance of the lithium-ion battery under the situation of overcharge.

Abstract: The present invention discloses a method for synthesizing polyoxymethylene dimethyl ethers by ionic liquid catalysis. The method comprises synthesizing polyoxymethylene dimethyl ethers by using a functional acidic ionic liquid as catalyst and using methylal and trioxymethylene as reactant under a relative mild reaction condition. The invention has advantages of high catalyst activity and reaction conversion, simple reaction process, high operationability and controllability, as well as good product distribution and high raw material utilization ratio.

Abstract: The present invention discloses a method for synthesizing polyoxymethylene dimethyl ethers by ionic liquid catalysis. The method comprises synthesizing polyoxymethylene dimethyl ethers by using a functional acidic ionic liquid as catalyst and using methylal and trioxymethylene as reactant under a relative mild reaction condition. The invention has advantages of high catalyst activity and reaction conversion, simple reaction process, high operationability and controllability, as well as good product distribution and high raw material utilization ratio.

Abstract: The present invention relates to a process for synthesizing trioxymethylene, wherein an aqueous solution of formaldehyde is used as the reactant; and an acidic ionic liquid in an amount of from 0.01 to 10 wt % is used as a catalyst.

Abstract: This invention disclosed a method for producing 1,2-propylene glycol from bio-based glycerol. In this method, a CuO—CeO2—SiO2 catalyst is filled into a fixed bed reactor, a glycerol solution is flowed into the reactor together with hydrogen gas in a manner of top feeding, and controlling the reaction temperature to be 170˜200° C., the reaction pressure to be 1.0˜5.0 MPa, so as to realize the production of 1,2-propylene glycol from the hydrogenation of glycerol. The catalyst used in this invention can sustain a high selectivity for the target product and a high conversion for glycerol for 500 hours.