7results about How to "Increase the active site" patented technology

This invention relates to a core-shell structured sodium iron phosphate pyrophosphate cathode material, its preparation method, electrode sheet, and battery, belonging to the technical field of methods or devices for directly converting chemical energy into electrical energy. The core-shell structured sodium iron phosphate pyrophosphate cathode material of this invention comprises primary particles, each primary particle including: a core, a sodium iron phosphate pyrophosphate shell layer disposed on at least a portion of the surface of the core, and a carbon coating layer located within the pores and on the surface of the sodium iron phosphate pyrophosphate shell layer; the core includes a NASICON-type sodium-ion inorganic solid electrolyte with an average particle size ≤50nm; the average thickness of the sodium iron phosphate pyrophosphate shell layer is ≤500nm; the chemical formula of the sodium iron phosphate pyrophosphate shell layer is Na₄Fe₂O₃. 3‑ x M x (PO4)2P2O7, 0≤x≤0.9, M is a doped metal element. The core-shell structured sodium iron phosphate pyrophosphate cathode material of this invention combines high solid density, high conductivity and good electrochemical performance.

The invention discloses a Fe / Cu-SAPO-11 adsorption carrier capable of adsorbing NH3 and resisting poisoning as well as a preparation method and application of the Fe / Cu-SAPO-11 adsorption carrier, and belongs to the field of environmental pollution control materials and technologies. The preparation method at least comprises the following steps: in the presence of a source containing aluminum, phosphorus and silicon, performing hydrothermal synthesis, calcining to obtain an SAPO-11 molecular sieve, and finally loading copper by an ion exchange method. And carrying out hydrothermal synthesis on iron oxide, and physically mixing the molecular sieve and the iron oxide to obtain the Fe / Cu-SAPO-11. The Fe / Cu-SAPO-11 prepared in the invention has a micron-scale spherical structure, and iron oxide loaded on the Fe / Cu-SAPO-11 has a regular hexagonal structure with a nano-scale size. Compared with the prior art, the method disclosed by the invention is simple to operate, easy for large-scale production, high in NH3 adsorption efficiency and good in sulfur resistance.

This invention discloses a five-layer electrodeposited high-sealing corrugated pipe based on ultrasound assistance and its preparation method, belonging to the technical field of metal corrugated pipe manufacturing. It aims to solve the problem that in multi-layer electrodeposited corrugated pipes, it is difficult to effectively coordinate current density, surface quality, and interfacial bonding strength, leading to insufficient densification of the deposited layer, unstable interlayer bonding, poor wall thickness uniformity, and failure to meet airtightness standards, ultimately resulting in poor overall performance stability. This invention includes a five-layer composite structure in which the pipe wall is composed of alternating nickel-cobalt alloy and copper layers. Each layer of the five-layer composite structure undergoes ultrasonic vibration treatment during deposition. The corrugated pipe prepared by this invention has a uniform and dense deposited layer with good interlayer bonding. The five-layer alternating deposition layer composite structure not only achieves uniform stress transmission and dispersion, effectively delaying crack propagation and interfacial penetration, but also improves the uniformity of wall thickness distribution, enabling the corrugated pipe to exhibit higher structural stability and long-term reliability in a sealed environment.

The application discloses a CO-SCR catalyst, a preparation method and application thereof, and the CO-SCR catalyst comprises a cerium-based composite oxide carrier and a noble metal active component, and the noble metal active component is dispersed on the surface of the cerium-based composite oxide carrier by means of a surfactant. The CO-SCR catalyst utilizes the dispersion and loading of the noble metal assisted by the surfactant, so that the CO-SCR catalyst has higher metal dispersion and redox capacity. Meanwhile, the suitable pH value of the carrier surface is also beneficial to the adsorption of CO and NO, and the low-temperature catalytic activity and high-temperature stability of the catalyst are improved, and the CO-SCR catalyst has higher catalytic activity and nitrogen selectivity in the use temperature range of 250 DEG C to 400 DEG C.

This invention discloses an aminated graphene oxide-based bipolar membrane and its preparation method, belonging to the field of bipolar membrane technology. The bipolar membrane is composed of a sulfonated polyphenylene sulfone cation layer, an aminated graphene oxide interlayer, and a quaternized polyphenylene ether anion layer stacked sequentially. This invention utilizes the aminated graphene oxide as the interlayer, taking advantage of its two-dimensional sheet-like morphology, abundant catalytic groups, and cross-linking effect to achieve a bipolar membrane with low water dissociation voltage, good interlayer compatibility, and structural stability. When applied to electrodialysis, it improves alkali concentration and current efficiency compared to commercially available membranes, while reducing energy consumption, showing promising application prospects in acid and alkali preparation, resource recovery, and other fields.

This invention belongs to the field of capacitor technology and discloses a composite activated carbon, its preparation method, and its application. The composite activated carbon comprises activated carbon and graphene generated in situ. When the composite activated carbon of this invention is used to prepare supercapacitor electrodes, the prepared electrodes have high specific capacitance and high volumetric specific capacitance.

The application relates to the technical field of heavy metal ion detection, in particular to a nitrogen-doped graphene modified paper-based electrode and a preparation method and application thereof. The preparation method provided by the application comprises the following steps: providing filter paper, the filter paper has a hydrophobic region and a non-hydrophobic region, and the surface of the hydrophobic region is provided with a hydrophobic barrier; printing a three-electrode system and a conductive pad on the surface of the filter paper to obtain a paper-based electrode, the three-electrode system comprises a working electrode, a counter electrode and a reference electrode; mixing an ammonium chloride and ammonia water mixed solution and an oxidized graphene solution to obtain an electrolyte; and dropping the electrolyte on the paper-based electrode to perform electrochemical deposition, thereby obtaining a nitrogen-doped graphene modified paper-based electrode. The preparation method is simple in operation and mild in conditions, and the nitrogen-doped graphene electrode prepared by the method has strong anti-interference performance, low detection limit and high sensitivity when simultaneously detecting Cd 2+ , Pb 2+ and Hg 2+ three ions in a water environment.