7results about How to "High cycle durability" patented technology

The invention relates to the technical field of phase change microcapsules, in particular to a polyurea / polyacrylate double-layer shell material phase change microcapsule and a preparation method thereof. The microcapsule sequentially comprises a phase change material core material, a polyacrylate shell material and a polyurea shell material from inside to outside, and is prepared from the following raw materials: a polyisocyanate monomer, an acrylate monomer, an acrylate functional monomer, an acrylate cross-linking agent, a chain extender, an initiator, a surfactant, a phase change material and water. According to the invention, polyurea interfacial polymerization and polyacrylate suspension polymerization are combined to form a double-layer shell material for coating to prepare the phase change microcapsule, so that the phase change microcapsule has excellent sealing property, durability and high enthalpy value performance.

The present application provides a phase change memory and a preparation method thereof, the method comprising: forming a gating layer and a phase change memory layer connected in series with the gating layer; the gating layer comprises a first sublayer and a second sublayer; wherein the element of the first sublayer is selected from at least one gating layer element in a first type of element set, and the element of the second sublayer is selected from at least one gating layer element in a second type of element set; the mobility of each gating layer element in the first type of element set is less than the mobility of each gating layer element in the second type of element set. In the method provided by the present application, a gating layer comprising a first sublayer and a second sublayer is formed, so that the mobility of each element in the first sublayer is less than the mobility of each element in the second sublayer, and the interface effect between the first sublayer and the second sublayer is utilized to alleviate the local phase separation or even crystallization caused by material diffusion, so as to improve the high temperature stability of the gating layer, thereby improving the high temperature stability of the phase change memory.

The invention discloses an acquisition task allocation method and device of a BMS chip and electronic equipment. The method comprises the following steps: determining a plurality of BMS chips in a battery pack and the connection condition of single batteries in the battery pack; determining the processing performance of the plurality of BMS chips; and based on the plurality of BMS chips, the processing performance and the connection condition of the single batteries, respectively allocating acquisition tasks to the plurality of BMS chips. According to the invention, the technical problem that the overall attenuation of the battery system is relatively large due to inconsistent power consumption of a plurality of BMS chips is solved.

This application provides a high-hydrogen-storage-capacity AB2-type hydrogen storage alloy that can be activated at room temperature, its preparation method, and its application. The chemical composition of the AB2-type hydrogen storage alloy is Ti. a Zr 1‑a Mn b Cr c Fe d RE f Wherein, 0.70≤a≤0.90, 0.7≤b≤1.3, 0.7≤c≤1.0, 0<d≤0.3, 1.7≤b+c+d<2.0, 0<f≤0.3; RE represents a combination of two or more rare earth elements. This application, through the synergistic addition of at least two rare earth elements and precise control of the content of each element in the alloy, achieves high hydrogen storage capacity while realizing rapid activation at room temperature, exhibiting moderate hydrogen absorption / desorption plateau pressure and excellent cycle stability. The preparation method provided in this application is simple and easy to industrialize. The hydrogen storage alloy provided in this application can be widely used in hydrogen energy storage, transportation, and utilization, and has broad market application prospects.

The application discloses a method for preparing a Ti / Ni-based catalyst by electrochemical dealloying and application thereof, and belongs to the technical field of magnesium-based hydrogen storage materials. In view of problems of insufficient active sites, single valence and poor dispersity of the existing Ti / Ni-based catalyst, the Ti-Ni alloy is modified by using an electrochemical dealloying process, a dilute hydrochloric acid is used as an electrolyte, a Ti-Ni alloy sheet is used as an anode, and a graphite sheet is used as a cathode to construct an electrolytic cell, power electrolysis is performed until the alloy sheet is completely pulverized, and after centrifugal washing and drying, the Ti / Ni-based catalyst is obtained. The Ti / Ni-based catalyst is compounded with a magnesium-based hydrogen storage material by a mechanical ball milling method, the obtained composite hydrogen storage material exhibits excellent low-temperature hydrogen storage capacity, efficient hydrogen absorption and desorption kinetic performance and good cycle stability, and effectively solves the technical bottleneck of a traditional MgH2 system. The preparation method is simple in operation, controllable in cost and scalable, is suitable for practical application scenes such as vehicle-mounted hydrogen storage, and provides key support for commercialization of the magnesium-based hydrogen storage material.

This invention relates to carbonaceous materials, where the micropore volume is determined to be 0.05 cm³ using a grand canonical ensemble Monte Carlo simulation of the adsorption-desorption isotherms of carbon dioxide. 3 / g or more and 0.20cm 3 For g and below, in the aforementioned adsorption-desorption isotherms, the ratio of desorption to adsorption (desorption / adsorption) at a relative pressure of 0.01 is 1.05 or higher.

The application discloses a kind of foamed nickel load (NiO) 0.75 (MnO) 0.25 Porous nanosheet solid solution electrode material and its preparation method and application relate to material science and nanotechnology and new energy field, in-situ diffusion and lattice reconstruction of NiO / Mn3O4 heterojunction obtained by microwave-assisted hydrothermal in the process of medium-high temperature heat treatment under certain conditions can induce conversion from uniform arrangement and mutual connection two-dimensional nanosheet array structure to (NiO) 0.75 (MnO) 0.25 Porous nanosheet solid solution effectively increases electrochemical accessible surface area and accelerates charge transfer kinetics, thereby exhibiting high specific capacity, wide voltage window and excellent cycle durability in alkaline aqueous supercapacitors. The method is simple, reproducible, and suitable for large-scale production of high-performance alkaline aqueous supercapacitor electrode materials.