4results about How to "Promote the practical process" patented technology

The application discloses a composite lithium-magnesium alloy negative electrode and a preparation and application thereof. After a fluorinated copolymer solution is uniformly loaded on the surface of a three-dimensional conductive framework, the three-dimensional conductive framework is combined with a lithium-magnesium alloy foil in a sandwich arrangement mode, and then the combination is obtained through mechanical rolling. The three-dimensional conductive framework material effectively reduces the size of the local current density, and can also provide sufficient accommodation space for the deposition of metal lithium. The elastic self-adaptive interface rich in LiF formed by using the fluorinated copolymer can accelerate the ion transmission at the interface and maintain the stability in a long cycle process. The lithium-magnesium alloy with the lithium affinity induces the uniform deposition of lithium ions, and the growth of dendrites is inhibited, so that the composite lithium-magnesium alloy negative electrode material with the fluorine-rich lithium elastic self-adaptive interface is constructed.

The application discloses a kind of safety transmission methods of indoor mixed PLC / VLC network, information from signal source S is transmitted to relay node by power line link, and is transmitted to the legal user randomly moving on the ground by visible light link after decoding and forwarding;Due to the broadcast characteristics of visible light, the eavesdropper in the coverage of visible light will also receive the information, therefore, the present method suppresses the reception of eavesdropper by setting the protection zone, and obtains the security outage probability and the secret throughput of indoor mixed PLC / VLC network under the random waypoint movement model of legal user based on the analysis of the channel statistical characteristics of power line link and visible light link;Simulation verifies that the performance of the safety transmission method disclosed in the application is related to the occurrence probability of impulse noise in power line link, the power ratio of impulse noise and background noise, the half-power emitting half-angle of LED in visible light link, the radius of protection zone and other parameters.

This invention provides a resin-based hard carbon material, its preparation method, and a battery. The resin-based hard carbon material has a porous structure, including micropores and ultramicropores; the pore size distribution of the ultramicropores is <0.7 nm, and the pore size distribution of the micropores is 0.7–2 nm (excluding 2 nm); zinc is also attached to the pore walls. The resin-based hard carbon provided by this invention has narrow, uniform, and dense pores, possessing both micropores and abundant ultramicropores, which is beneficial for lithium-ion storage. Furthermore, the ultramicropores isolate the entry of electrolyte, avoiding excessive side reactions and irreversible capacity buildup while achieving lithium-ion storage. It also retains the high-rate performance characteristics of hard carbon materials. The zinc in the pores also has a lithiophilic effect, further attracting lithium ions into the pores, thus achieving the goal of improving the capacity and first-time efficiency of hard carbon materials while maintaining high-rate performance.

The invention discloses a 1.5 GPa-grade precipitation strengthening type multi-principal-element alloy and a heat treatment method thereof, and belongs to the technical field of novel metal materials. On the basis of an AlCrFeNi series FCC / B2 double-phase multi-principal-element alloy, a novel double-stage solid solution coupling aging heat treatment process which is simple in procedure and low in cost is developed. According to the process, a multi-level and multi-mode precipitated phase structure is introduced, and the mechanical property of the as-cast FCC / B2 double-phase multi-principal-element alloy is remarkably improved. The yield strength and the tensile strength of the alloy at the room temperature are up to 1050 MPa and 1567 MPa correspondingly, and the requirements of the aerospace field for high-strength and high-toughness metal materials are met. The heat treatment technology shows huge potential in the aspect of improving the comprehensive mechanical property of the FCC / B2 double-phase multi-principal-element alloy, and practical application of the alloy in the key fields of aero-engine components, rocket structural parts and the like can be powerfully promoted.