8results about How to "Easy to oxidize" patented technology

The present disclosure belongs to the field of battery technologies, and specifically relates to a battery. The battery includes a positive electrode plate, a negative electrode plate, a non-aqueous electrolyte solution, and a separator. The non-aqueous electrolyte solution includes a non-aqueous organic solvent, a lithium salt, and an optional electrolyte additive. A termination tape of the positive electrode plate is disposed at a paste coating tail of the positive electrode plate. An area of a termination tape of the positive electrode plate is A cm2, and a width of the positive electrode plate is C cm, wherein a ratio of A to C is in a range of 1 to 3. The battery can effectively improve high-temperature performance of a battery cell of the prepared battery, and can also solve a problem of lithium deposition at an edge of an electrode plate occurred after cycling of the battery cell, to avoid problems, such as thickness failure in high-temperature storage and lithium deposition in high-temperature cycling of the battery cell caused by warping and deformation of a termination tape of a positive electrode plate, an adhesive layer in the termination tape of the positive electrode plate being easily soluble in a non-aqueous electrolyte solution, and the non-aqueous electrolyte solution being easily oxidized, reduced and decomposed at positive and negative interfaces, occurred when the battery is used in a high-temperature environment.

This invention relates to conjugated polymers containing dibenzofuran (thiophene) and carbazole units, their preparation methods, and applications. To address the problems of poor optical contrast, slow response time, and poor cycling stability of existing conjugated polymers as electrochromic materials, this invention uses 2,8-dibromodibenzofuran or 2,8-dibromodibenzothiophene as reactants, reacting them with 9-hexyl-3,6-bis(4,4,5,5-tetramethyl-1,3,2-dioxoborane-2-yl)-carbazole or 9-phenyl-3,6-bis(4,4,5,5-tetramethyl-1,3,2-dioxoborane-2-yl)-carbazole to form conjugated polymers with dibenzofuran (thiophene) and carbazole units in the main chain. The conjugated polymers of this invention exhibit excellent electrochromic properties, including excellent cycling stability, fast switching time, high optical contrast, and low voltage start-up. This invention is expected to be applied in fields such as smart windows, rearview mirrors, military camouflage, and electronic tags in the construction and automotive industries.

This invention discloses a heterocyclic polyarylamide-polyhydroxyarylamide precipitated fiber, its preparation method, and a heterocyclic polyarylamide-polybenzodioxazole paper, belonging to the technical field of high-performance organic fiber and paper preparation. The preparation method of the precipitated fiber includes the following steps: A. Preparation of the polymerization solution: 3,3'-dihydroxybenzyl diamine (DHB) and 2-(4-aminophenyl)-5-aminobenzimidazole (DAPBI) are dissolved in an organic solvent containing a solubilizing salt, and then terephthaloyl chloride is added to react and obtain a polymer solution with a solid content of 1-10%; B. Precipitation: After degassing, filtering, metering, and spinning, the polymer solution is mixed with a coagulation bath and precipitated to obtain the heterocyclic polyarylamide-polyhydroxyarylamide precipitated fiber. A heterocyclic polyarylamide-polybenzodioxazole paper prepared from this precipitated fiber is also provided. This invention introduces a heterocyclic polyaromatic amide structure through copolymerization, which not only improves the strength and composite properties of the cyclized PBO paper, but also maintains a decomposition temperature comparable to that of pure PBO fiber, exceeding 600℃, demonstrating excellent thermal stability. Furthermore, this method is simple and easy to implement, making it suitable for industrial production applications.

The application is a honeycomb concrete wave-absorbing structure based on a full-dielectric phase gradient metasurface, which is composed of a base fiber honeycomb concrete and a top full-dielectric phase gradient metasurface structure. The base fiber honeycomb concrete is divided into a multi-layer structure by different contents of wave-absorbing agents, the impedance matching is adjusted by changing the content and type of the wave-absorbing agents, and the function of maximum absorption of electromagnetic waves is achieved. The fiber wave-absorbing honeycomb woven by wave-absorbing fibers enables the concrete to have good toughness and strength, and achieves the dual effect of synergistic enhancement of wave-absorbing and mechanical properties. The size and shape of the micro units in the full-dielectric phase gradient metasurface can be flexibly adjusted, different micro units are combined, electromagnetic waves produce different phases, and the purpose of flexibly adjusting the electromagnetic wave-absorbing performance of different frequency bands is achieved. Through the combination of 3D fiber honeycomb structure, multi-layer wave-absorbing structure and metasurface and other factors, the optimal electromagnetic wave-absorbing structure is prepared, and the requirements of thin, light, wide and strong of the electromagnetic wave-absorbing material are met.

The application discloses a Cu-Sn-S metal sulfide adsorbent for capturing Ni 2+ , and has the molecular formula K 2‑ x Cu x (H2O) x [Cu2Sn2S6], x =0.1~1.9; has a two-dimensional layered structure, each electronegative layer skeleton is sequentially composed of [Sn-Cu-S], [Cu-S] and [Sn-Cu-S] three sub-layers, wherein K + is located in the pores of two [Sn-Cu-S] sub-layers and is used for balancing the charge of the layer skeleton; when Ni 2+ is adsorbed, Cu + in the [Sn-Cu-S] sub-layer is exchanged with Ni 2+ , so that the high-efficiency and high-selectivity capture of Ni 2+ in radioactive wastewater is realized.

Provided is a joint of a copper terminal and an aluminum conductor. A copper terminal connecting member of the joint is connected to a conductive core of the aluminum conductor by means of a transition welding layer, and the joint can also be provided with a reinforcing welding layer. Further provided is a method for preparing the joint using plasma arc welding. According to the invention, the connection portion of the copper terminal with the aluminum conductor is filled with solder in a plasma arc welding manner, such that copper and aluminum are connected by means of the solder. Damage to an aluminum oxide layer during welding increases the conductivity and can also isolate the copper terminal and the aluminum conductor, thus preventing an electrochemical reaction between the copper and the aluminum, prolonging the service life of the joint of the copper terminal and the aluminum conductor, and ensuring the mechanical and electrical performance of the connection structure.

This method for recovering a valuable metal from a used LIB includes: a step of adding, to an electrode assembly taken out of a detoxified used LIB, metallic zinc in an excess amount relative to a mass of the electrode assembly; a step of heating a mixture of the electrode assembly and the metallic zinc to form a molten metal; a step of taking out the molten metal and separating the molten metal into an alloy metal and a slag; and a step of heating the alloy metal to volatilize zinc in the alloy metal, and thereby, recovering an alloy metal of a valuable metal.

The utility model discloses energy-saving aluminum alloy door and window heat insulation strip processing equipment, and relates to the technical field of aluminum alloy door and window heat insulation strips. The heat insulation strip comprises supporting plates, rotating shafts are arranged on one sides of the opposite faces of the supporting plates in a rotating mode, a stirring barrel is fixedly arranged between the rotating shafts, auxiliary stirring assemblies are arranged on one rotating shaft and the supporting plate, and a barrel cover is detachably arranged on the upper surface of the stirring barrel. A disc can be rotated by starting a second motor, a convex rod can slide along the inner surface of a hollow rod through rotation of the disc, the hollow rod can reciprocate through a movable rod and a sleeve, a rack can reciprocate through a fixed block, and the heat insulation effect can be improved through a heat insulation film. The rack can drive the gear to swing back and forth, and the stirring barrel can swing by matching the connecting rod with the rotating shaft, so that the raw materials can be mixed more sufficiently.