4results about How to "Long durability" patented technology

An apparatus and method for reinforcing a nonwoven fabric comprising at least one layer of unreinforced nonwoven fabric and / or one layer of loose fibers, the apparatus having at least one transport platform configured for transporting the unreinforced nonwoven fabric and / or loose fiber layer, the transport platform having a circulating conveyor belt having a first horizontal section, followed by a second downwardly sloping section along the material transport direction, having a first cylinder with at least two water jet beams along the material transport direction, and a second cylinder with at least two water jet beams disposed above the first cylinder. The invention is characterized in that the first cylinder for receiving the nonwoven fabric or loose fiber layer cooperates with the downwardly sloping section of the transport platform such that the upper side of the unreinforced nonwoven fabric or the upper side of the loose fiber layer is located on the cylinder surface.

The invention provides a fuel cell system. In a fuel cell system which is provided with a plurality of fuel cells and a storage battery and does not have a DC-DC converter, deterioration of the plurality of fuel cells is suppressed, and deterioration of durability of the fuel cell system is suppressed. A fuel cell system (1) is provided with three FC stacks (11A-11C) connected in parallel, one battery (12) connected to all of the three FC stacks (11A-11C), and a control device (20), and is not provided with a DC-DC converter. The control device (20) is configured so as to simultaneously measure the FC currents of the three FC stacks (11A-11C). The control device (20) controls the power generation of the three FC stacks (11A-11C) on the basis of the difference between the simultaneously measured FC currents.

This invention discloses a parallel-interface engineered viologen-based defective carbon nitride composite material, its preparation method, and its applications, belonging to the field of energy catalysis and photochemical materials technology. The material comprises: a defective graphitic carbon nitride support; single-atom platinum catalytic sites supported on the support; and a selenium-containing viologen compound anchored by covalent bonds in a configuration parallel to the support surface. Through a bilateral covalent bonding strategy, viologen molecules are stably anchored in a parallel configuration to the single-atom platinum-modified defective carbon nitride surface, constructing a highly efficient and stable "electron bridge" structure, significantly enhancing interfacial bonding and photogenerated electron transport efficiency. This composite material exhibits excellent photocatalytic hydrogen evolution activity and efficient coupling ability with benzylamine oxidation under visible light, and its activity retention rate reaches over 92% after 144 hours of cycling. It provides a new paradigm for solving the problem of poor interfacial stability in photocatalysts and has significant application prospects in the field of solar fuel synthesis.

The invention relates to the technical field of diaphragms for flow batteries, in particular to a branched polybenzimidazole composite membrane for an all-vanadium flow battery and a preparation method of the branched polybenzimidazole composite membrane. The preparation method comprises the following steps: step 1, synthesizing branched PBI; step 2, preparing a branched PBI base membrane; and 3, performing interfacial polymerization modification to form a functional separation layer. The invention aims to provide an efficient and reliable solution for solving the technical problem through material innovation and process optimization on the basis of a synergistic strategy of a branched PBI base membrane and interfacial polymerization modification.