107results about How to "Increase the transmission channel" patented technology

The invention discloses a high ionic conductivity sulfide solid electrolyte material, and a preparation method and application of the high ionic conductivity sulfide solid electrolyte material in a full-solid lithium-sulfur battery. A chemical composition of the material is Li7P3-xMnxS11-(3x+y)/2Iy, wherein x is greater than 0 and less than 0.5, and y is greater than 0 and less than 1. The preparation method of the material comprises the following steps: mixing and ball-milling Li2S, P2S5, MnS and LiI to obtain an initial solid electrolyte material; and performing heat treatment for the initial solid electrolyte material under the inert gas, and then grinding into powder to obtain the high ionic conductivity sulfide solid electrolyte material. The lithium-sulfur solid battery is prepared by preparing a composite positive electrode formed by ball milling and uniformly mixing sulfur, conductive carbon black and solid electrolyte, and the positive electrode is used for solving the disadvantages of low electron conductivity rate of the sulfur and low ion conductivity. The prepared lithium-sulfur battery has the advantages of high safety, high energy density and high cycling stability.

The invention relates to a thermal preparation method of a solution of a self-supported porous graphene-based membrane, relates to a preparation method of a self-supported porous graphene-based membrane, and aims to solve the technical problems that the size and the thickness of a conventional self-supported porous graphene-based membrane are limited and the electrochemical performance of the conventional self-supported porous graphene-based membrane is poor caused by severe interlay lamination of graphene sheets in the chemical reduction process. The thermal preparation method comprises the following steps: dispersing graphene oxide into water, adding or not adding a doped carbon material, concentrating, and spreading into a membrane, thereby obtaining a graphene oxide membrane; preparing a thermal treatment solution by using acid or alkali solute, putting the graphene oxide membrane into a reaction kettle with a polytetrafluoroethylene lining, adding the thermal treatment solution according to the standard that the membrane is submerged, sealing the reaction kettle, and subsequently performing thermal treatment, thereby obtaining the self-supported porous graphene-based membrane. The self-supported porous graphene-based membrane is prepared by orderly arranging graphene sheets in parallel, and due to the gaps among the graphene sheet layers, the self-supported porous graphene-based membrane can be used in electrochemical energy storage devices such as supercapacitors.

The invention relates to a lithium-sulfur battery composite positive electrode material and a preparation method thereof. The positive electrode material consists of following components by weight percent: 30-59.4% of a conductive agent with a mesoporous structure, 40-60% of sulfur and 0.1-10% of a modifying agent, wherein sulfur is dispersed into holes of the conductive agent, and the modifying agent is connected with the holes of the conductive agent through a chemical bonding manner. The preparation method comprises the steps of pouring sulfur into the conductive agent by adopting a molten suction method so as to obtain a conductive agent/sulfur composite material; and then modifying the obtained conductive agent/sulfur composite material to obtain the lithium-sulfur composite positive electrode material. According to the composite positive electrode material, not only can the good high-rate stability be realized, but also the loss of active substances and the influences of corrosion to a lithium negative electrode, rapid capacity fading and the like caused by the 'shuttle effect' due to dissolution of lithium sulfide can be effectively reduced, and the cycle performance of the lithium-sulfur battery can be obviously improved.

The invention is applicable to the data processing field and provides a road underground cavity detection system and a vehicle-mounted system. The road underground cavity detection system comprises a central control system, a satellite positioning system, a digital pre-processing system, a power supply system and a ground penetrating radar system, wherein the satellite positioning system, the digital pre-processing system, the power supply system and the ground penetrating radar system are connected to the central control system, and the digital pre-processing system is connected to the ground penetrating radar system. The invention can detect the cavities under the road, restores the cavities underground in advance and thus prevents the collapse accidents.

The invention discloses a manganese oxide electrode material with a metal cation intercalation structure. In the material, metal cations are inserted between the layers of the original manganese oxide, and a metal nano sheet is also grown on the surface. The insertion of the cations increases the layer spacing so as to facilitate insertion and removal of the ions in the electrolyte during the charging and discharging process. The increase of the specific surface area provides larger contact sites for the ions in the electrolyte. The preparation method of the electrode material is as follows: 1), placing 0.1-10mol/L metal salt solution in a three-electrode electrolytic cell, taking the Ag/AgCl electrode as a reference electrode and the platinum sheet as a counter electrode and putting the manganese oxide into the three-electrode electrolytic cell to form a three-electrode system; 2), using the scanning rate of 5-500mV/s to electrochemically embed the metal cations into the manganese oxide material, wherein the number of segments can be 200-2000 segments; and 3) repeatedly cleaning the black-brown product and vacuum drying.

The invention relates to an optimized preparation method of a membrane electrode containing an anion exchange resin transition layer used for electrolysis. The membrane electrode subassembly includes a specific combination of an anion exchange resin transition layer, a catalyst layer, a cathode gas diffusion layer, an anode gas diffusion layer and an anion exchange membrane. The membrane electrode subassembly prepared by the invention has a good performance when the membrane electrode subassembly uses as alkaline solid polymer electrolyte (AEM) water electrolysis. The membrane electrode has a wide utilization value in regenerative fuel cell (RFC), photoelectrocatalysis and electrolytic hydrogen generator.

Each component constituting electrode catalysis layer is in gradient distribution in Z direction of electrode (perpendicular to direction of catalysis layer). In macroscopy, electrode catalysis layer is in structure of multiple layers for example at least divided into two layers structure. First layer structure as partial hydrophobic catalysis layer composed of first catalytic activity metal, water repellent and conducting ionic polymer. Second layer structure as hydrophilic catalysis layer composed of second catalytic activity metal and conducting ionic polymer. Composite two layers constitute partial hydrophobic and partial hydrophilic composite electrode. Advantages of the structure of electrode are: enhancing capability of mass transfer of gas, especially when air as oxidant, meanwhile keeping enough capability of electron conduction and proton transfer; extending effective triphase interface of catalytic reaction; raising output power density.

The invention relates to a metal-doped Na3V2(PO4)3 composite electrode material and a preparation method and application thereof. The metal-doped Na3V2(PO4)3 composite electrode material is a Na3V<2-x>M<x>(PO4)3/C composite electrode material in a micro-nano composite particle shape. According to the preparation method, an organic matter carbon source is added and can be coated on a surface of Na3V<2-x>M<x>(PO4)3/C precursor particle in an in-situ way during the hydrothermal process, can be used for preventing the Na3V<2-x>M<x>(PO4)3/C precursor particle from being grown and agglomerated and also can be decomposed to amorphous carbon during the thermal treatment process, the formation core is Na3V<2-x>M<x>(PO4)3/C particle, and a shell is a core-shell structure of the amorphous carbon. Themetal-doped Na3V2(PO4)3 composite electrode material has the advantages of favorable conductivity, excellent cycle stability, rate performance and the like. The metal-doped Na3V2(PO4)3 composite electrode material belongs to the field of an electrode material.

The invention discloses a detecting and processing method for validity of a link among multiple nodes, and belongs to the field of multi-node link transmission of a TETRA digital trunking system. A multi-node data mutual transmission link generally has multiple phenomena, including, long-term validity, link long-term disconnection, link recovery after disconnection, disconnection in link validity process, and alternate link disconnection and recovery. Due to the phenomena, various abnormal conditions for applications are aroused in a practical running process. The detecting and processing method for validity of the link among multiple nodes comprises the steps of calculating time when a heartbeat request is sent at each time; dispersing the time on a time grid; detecting the validity of the link in a preset period; and performing detection for link recovery by adopting a hypothetical recovery strategy in a link recovery process. Through the ways mentioned above, feedback of the validity of the link is added, and accurate guarantee is provided for link selection of the applications.

The invention relates to a Na3V2(PO4)3 cathode material for a sodium-ion battery as well as preparation and application of the cathode material. An intermediate phase with laminar morphology and highdegree of crystallinity is synthesized from cheap raw materials to serve as a template, and formation of a final product, namely, nanoscale Na3V2(PO4)3 with laminar morphology, is controlled. According to the preparation method, the raw material cost is low, the preparation process is simple and easy, Na3V2(PO4)3 synthesized from the intermediate phase as the template is of a flower-like structurestacked in a nanosheet shape, and shows excellent rate performance and excellent cycling stability when used as the cathode material to be applied to the sodium-ion battery.

The invention discloses a sodium ion gradient doped spinel structure positive electrode active material and a preparation method thereof. The sodium ion gradient doped spinel structure positive electrode active material comprises lithium-containing compound particles of which the chemical formula is Li < 1 + x > Na < y > Ni < 0.5-z > Mn < 1.5-r > O , wherein-0.2 < = x < = 0.2, -0.2 < = y < =0.2, -0.2 < = z < = 0.2, -0.2 < = r < = 0.2, and 3.8 < = u < = 4.2, the lithium-containing compound particles are doped with sodium ions, the concentration of the sodium ions is gradually reduced fromthe surface to the interior, and the doped precursor of the sodium ions is -COONa-containing organic sodium salt. With utilizing of the thickening, bonding, dispersing and stabilizing effects of theorganic sodium salt in the aqueous solution, the electrochemical performance of the spinel lithium nickel manganese oxide positive electrode material can be remarkably improved, the overall performance of the battery is optimized and improved, and the material has a wide application prospect in application and development of the spinel positive electrode material.