9results about How to "Have mechanical strength" patented technology

The invention provides a lithium manganate positive electrode material and a preparation method thereof, a positive plate and a battery, and belongs to the technical field of batteries, the structural general formula of the lithium manganate positive electrode material is Li1 + xMyMn2-(x + y) O4, x is greater than or equal to 0.1 and less than or equal to 0.33, y is greater than or equal to 0.005 and less than or equal to 0.01, M comprises at least one of Co, Ni, Cr and Fe, and the 111 crystal face diffraction peak intensity I111 of the lithium manganate positive electrode material is greater than 3100. According to the lithium manganate positive electrode material, the energy density, the effective gram volume and the structural stability of the lithium manganate positive electrode material, especially the performance of the lithium manganate positive electrode material in a low-voltage range of 2.0-3.3 V, are improved through lithium enrichment, doping of a proper proportion of M elements and synergistic cooperation of 111 crystal face diffraction peak intensity of the lithium manganate positive electrode material, so that the energy density, the effective gram volume and the cycling stability of the battery are improved, and the battery performance is improved. The battery service life is prolonged.

This invention discloses a surface-modified current collector, an all-solid-state battery, its preparation method, and an electrical device. The surface-modified current collector includes a negative electrode current collector substrate, a lithium storage layer, and a lithiophilic layer arranged sequentially along the thickness direction. The lithium storage layer has a plurality of micropores oriented perpendicularly to and / or inclined to the surface of the negative electrode current collector substrate. The lithium storage layer includes a conductive micropore template with a micropore structure having a plurality of micropores with the same orientation as the micropores and a vanadium nitride layer disposed on the surface of the conductive micropore template and the inner wall of its micropore structure. This lithium storage layer constitutes a three-dimensional conductive framework, which can guide lithium ions to transport longitudinally or tend to transport longitudinally and deposit uniformly, suppress lithium dendrite growth, and alleviate volume expansion stress during cycling. The lithiophilic layer provides low nucleation overpotential sites, further promoting uniform lithium deposition. Through the synergy of the above layers, uniform lithium deposition can be effectively achieved, and volume expansion stress during cycling can be dispersed and absorbed, significantly improving the cycle performance and safety of the battery.

The application relates to a replaceable optical fiber monitoring cable and a replacement method thereof, and belongs to the technical field of optical fiber monitoring. Step one: when the optical fiber in the monitoring cable needs to be replaced, a part of the outer tube, the stainless steel wire layer and the inner tube at one end of the monitoring unit in the monitoring cable are peeled off in sequence, so that one end of the optical fiber unit to be replaced is exposed; step two: aramid yarn at one end of the exposed optical fiber unit to be replaced is peeled off, and the peeled aramid yarn and aramid yarn in the optical fiber unit to be installed are uniformly wound together, and the two are integrated; step three: the other end of the optical fiber unit to be replaced is uniformly pulled out, and the optical fiber unit to be replaced is uniformly wound on the take-up frame at a constant speed; the optical fiber unit to be installed is uniformly released through the pay-off frame at a constant speed, the optical fiber unit to be installed is pulled and introduced into the monitoring cable, and the replacement of the optical fiber is realized. The application can quickly replace the optical fiber, saves time and effort, and ensures that online monitoring can be continuously carried out during the use of the overhead cable.

The high-temperature-resistant ceramic composite thermocouple protective sleeve comprises a protective tube body, the protective tube body comprises a protective tube outer layer, a protective tube middle layer and a protective tube inner layer which are sequentially arranged from outside to inside, and the protective tube outer layer is formed by compounding a mullite ceramic layer and a high-temperature-resistant anti-oxidation coating coated on the mullite ceramic layer. The outer surface of the non-measuring end of the protective tube outer layer is further provided with a wear-resistant protrusion, the inner wall of the protective tube inner layer is provided with a spiral groove, the bottom end of the protective tube inner layer is in threaded connection with a sealing end cover, and the sealing end cover and the bottom end of the protective tube body are fixedly sealed through high-temperature-resistant sealant. The protective sleeve solves the problems that an existing protective sleeve is easy to damage in a high-temperature environment, low in heat conduction efficiency and the like through the optimal design of the structure and the material.

This invention discloses a method for preparing an ultrathin ordered macrocyclic molecular membrane. The method involves synthesizing macrocyclic molecules with high polymerization activity and amphiphilic guest molecules. The inclusion complexes formed by the macrocyclic molecules and guest molecules are orderedly assembled using Langmuir-Blodgett (LB) technology. Photopolymerization is then employed to achieve ordered cross-linking of the macrocyclic molecules, resulting in an ultrathin ordered macrocyclic molecular membrane. The macrocyclic molecular membrane prepared by this invention is monomolecular in thickness and possesses good mechanical strength. With the assisted orientation of the amphiphilic guest molecules, the macrocyclic molecules achieve ordered assembly at the water-air interface. The membrane preparation process proposed in this invention is simple, cost-effective, versatile, and easily scalable, making it significant for the field of high-performance separation membranes.

The utility model relates to an acid-resistant high-strength plastic bag, which belongs to the technical field of plastic bags and comprises a plastic bag body, the plastic bag body comprises a base material layer, a barrier layer, a high-strength nylon fiber net and an encapsulation layer, the outer surface of the base material layer is coated with the barrier layer, and the encapsulation layer is arranged on the periphery of the barrier layer. And a high-strength nylon fiber net is woven between the barrier layer and the encapsulation layer and is of a net structure. The utility model has the beneficial effects that the modified polyamide 6 material is melted and extruded into the sheet-shaped base material, then the nano silicon dioxide particle dispersion liquid is sprayed on the surface of the sheet-shaped base material to form the uniformly distributed barrier layer, then the high-strength nylon fiber net prepared in advance is laid outside the barrier layer to ensure that the high-strength nylon fiber net is flatly attached, and finally, the high-strength nylon fiber net is coated on the surface of the sheet-shaped base material. The thermoplastic elastomer material is heated and melted and then covers the high-strength nylon fiber net, the finished plastic bag is obtained after cooling and curing, and compared with a traditional multi-layer composite structure, the production mode is more convenient.

The utility model provides a kind of fuse, comprising: shell, fuse, two cover plates, two connecting end, indicator, microswitch, fuse is set in shell interior, and the connecting end is connected in the both ends of fuse, two cover plates are respectively covered in the both ends of shell, connecting end is connected outside circuit by passing through cover plate, indicator is set in shell side, microswitch is set on the lateral wall of shell side corresponding indicator, and the both ends of microswitch are respectively connected on the cover plate of the both ends of shell;Connecting end is flat structure, and connecting end includes the aluminium alloy matrix in interior and the copper layer being covered on the upper and lower surfaces of aluminium alloy matrix. By this, the fuse of the utility model has better electrical performance, low cost and high mechanical strength.

The application discloses a preparation method and application of a peptide self-assembled photo-induced thermoelectric composite functional film, and belongs to the field of new biological materials. The method comprises the following steps: adding a peptide and tyrosinase into a reaction system to obtain a reaction solution, the peptide comprises at least one tyrosine residue, and simultaneously comprises at least one positive electric amino acid residue and at least one negative electric amino acid residue; the tyrosinase catalyzes the reaction of the tyrosine residue in the peptide to generate a melanin-like structure, so as to self-assemble to form a photo-induced thermoelectric composite functional film at a gas-liquid interface. In the assembling process, the catalytic oxidation of the tyrosinase is simultaneously completed to prepare the film, the film is only composed of the peptide, does not need a substrate, can independently exist and can be processed into a specific shape; the melanin-like structure in the film simultaneously has photo-thermal and photo-electric dual functions, is used for tumor photo-thermal treatment and photo-electric nerve stimulation, and overcomes the problems of limited form, single function and insufficient biocompatibility of the existing peptide materials.

The utility model discloses an assembled graphite product, including base, with the base of graphite block and the circular ring thin wall component of setting outside graphite block and with base intercalation, the circular ring thin wall component includes a plurality of arc blocks of intercalation, and two ends of arc block are equipped with first intercalation block, first intercalation groove. The graphite product provided by the new type has complex structure, and has certain mechanical strength, improves the application of graphite product.