13results about How to "Improve electron transport efficiency" patented technology

The invention provides a double-layer double-high type electrode, a reserve lithium battery and a preparation method thereof, the double-layer double-high type electrode comprises a current collector, a first active layer and a second active layer, the first active layer is located between the current collector and the second active layer, the first active layer contains an energy type active material, and the second active layer contains an energy type active material. The second active layer contains a pre-charged power type active material, and the open-circuit voltage difference between the energy type active material and the pre-charged power type active material is less than or equal to 0.5 V. The invention provides the double-layer double-high type electrode for the reserve lithium battery, which is quick in activation, high in energy density and good in rate capability, an efficient conductive network is constructed, and the discharge performance of the battery is improved; the porosity of the second material layer is regulated to be greater than that of the first material layer, and the seepage flow guide grooves are dug in the surface of the second material layer, so that the electrolyte infiltration rate of the electrode is improved, and the activation time is shortened.

The invention relates to the field of electrochemical oxidation, and particularly discloses a preparation method of a co-doped modified Ti4O7 electrode, and the preparation method comprises the following steps: 1, mixing Ti4O7 powder, a metal source and a non-metal source, and carrying out ball milling to obtain mixed powder; and 2, adding a binder and an organic dispersant into the mixed powder, and carrying out ultrasonic treatment, heating and stirring, drying and sintering to obtain the co-doped modified Ti4O7 electrode. The co-doped modified Ti4O7 electrode prepared by the invention has excellent chlorine evolution and sterilization performance, and can be applied to purification treatment of wastewater containing ammonia nitrogen pollutants and long-acting maintenance of disinfection and sterilization of small water bodies such as circulating water, landscape water, ballast water and the like.

The invention relates to the technical field of solid-state batteries, in particular to a porous silicon carbon-metal composite negative electrode material and a solid-state battery. The porous carbon skeleton comprises a first hole, a second hole and a third hole; the aperture d1 of the first hole is greater than or equal to 5nm and less than or equal to 20nm; the aperture of the second hole is d2, and d2 is more than 25nm and less than or equal to 50nm; the aperture of the third hole is d3, and d3 is more than 80nm and less than or equal to 200nm; at least nanometer silicon particles are arranged in the first holes, and at least metal particles are arranged in the second holes and the third holes. According to the porous silicon carbon-metal composite negative electrode material, through the partition design of the gradient porous framework, the silicon locking function is achieved through the first holes, the stress buffer area effect is achieved through the second holes / third holes, the problem that the volume of a negative electrode with the large silicon loading capacity is seriously expanded can be remarkably solved, the silicon loading limit of a traditional single micropore structure is broken through, and the service life of the negative electrode is prolonged. And the energy density and the cycling stability of the battery are obviously improved.

The invention discloses a preparation method of a high-conductivity multivalent nanowire and application of the high-conductivity multivalent nanowire to a non-enzyme glucose sensor. The copper nanowire with a high length-diameter ratio is prepared, a certain amount of thiourea is directly added into an ethanol solution of the copper nanowire, and conversion from the copper nanowire to the high-conductivity multivalent nanowire can be achieved under the condition of a specific reaction temperature. In the conversion process, the surface of the nanowire is synchronously induced to form a coarse structure, non-single valence copper sulfide active sites are constructed, and the formed synergistic effect can remarkably increase the number of the active sites, reduce an electrocatalytic oxidation reaction energy barrier and strengthen the specific adsorption capacity of glucose molecules, so that the non-enzyme glucose sensor is manufactured. The sensor shows ultrahigh detection sensitivity, ultralow response speed and excellent anti-interference performance, the preparation process is extremely simple, the cost is low, and the sensor has remarkable technical advantages and wide application prospects in the field of quantitative detection of glucose.

The present invention discloses a method for preparing porous copper foil by electrochemical anodization under a complexing agent electrolyte system. The method comprises: providing an electrolyte, the electrolyte mainly comprising a complexing agent electrolyte and an electrolyte additive, the complexing agent electrolyte comprising sodium potassium tartrate, EDTA-2Na, sodium citrate, etc., and the electrolyte additive comprising ammonium sulfate, sodium chloride, ammonia, copper sulfate, sodium hydroxide, sodium sulfate, etc.; using a copper-based metal material as an anode, so that it and a cathode and an electrolyte jointly construct an electrochemical reaction system, and electrochemical anodization is performed to obtain a porous copper foil. The method of the present invention is to anodize the copper foil, and to form a copper chelate with the aid of a complexing agent electrolyte and adsorb it on the anode surface. The method has a short operation process and a low preparation cost, and can prepare a porous copper foil with high specific surface area, high electron transfer efficiency and high strength, and has great application potential in the fields of secondary battery current collectors and electrocatalysis.

This utility model discloses an electrode sheet, a multi-tab battery cell, and a battery. The electrode sheet includes a current collector, an active material layer, and a tab region permeation structure. The current collector has a coated area and an uncoated area, with the uncoated area located on one side of the coated area. The active material layer is coated on the coated area. The tab region permeation structure is formed on the uncoated area. After the electrode sheet is wound into a battery cell, the tab region permeation structure is arranged around the periphery of the battery cell core. The tab region permeation structure is used to form a radial permeation channel for electrolyte in the battery cell tabs. In this way, the tab region permeation structure can break through the limitation of the dense metal layer formed by the tabs in traditional multi-tab batteries, providing a radial permeation path for the electrolyte, improving the electrolyte permeation and wetting speed and uniformity, effectively reducing electrolyte residue at the bottom of the battery, and avoiding problems such as decreased utilization of active materials caused by insufficient local wetting or uneven electrolyte distribution on the battery electrode sheet.

The invention belongs to the technical field of display, and relates to a composite material. The composite material comprises an oxide semiconductor nanomaterial, poly (diallyldimethylammonium chloride) and an organic solvent. The invention also relates to a luminescent device, a display device and a preparation method of the carrier transport composite film. According to the technical scheme provided by the invention, the prepared electron transport layer has relatively high compactness, so that the electron transport efficiency of the electron transport layer can be improved, and the performance of the light-emitting device is further improved.

This application relates to the field of cold cathode field emission material preparation technology, and discloses a method for preparing a graphene-diamond composite structure to improve the field emission performance of diamond. The method involves first dispersing nanodiamonds and graphene oxide in a deep eutectic solvent; then adding boric acid to induce an in-situ sol-gel transformation under heating, forming a gel network that locks the dispersed phase; followed by microwave-assisted interface activation and gradient high-temperature carbonization, and finally cleaning and drying to obtain the product. This invention effectively suppresses phase separation and agglomeration during pyrolysis through a gel solidification mechanism, and utilizes the deep eutectic solvent and boric acid pyrolysis to achieve in-situ co-doping of nitrogen and boron, constructing a low-barrier continuous conductive channel on the diamond surface, and realizing tight electrical interconnection between components. This method is simple and controllable, and the resulting composite material possesses excellent conductivity, low turn-on electric field, and high emission stability, thus improving the electron emission efficiency of cold cathode devices.

This application belongs to the field of display technology and relates to an optoelectronic device. The optoelectronic device includes a first electrode, an active layer, an electron transport layer and a second electrode stacked in sequence. The electron transport layer is made of a thermal exciton material, which can improve the electron transport efficiency of the electron transport layer and improve the luminous efficiency and lifespan of the optoelectronic device.

The application provides a compound having a structure shown in formula (I). The compound has a parent structure of an ortho-disubstituted pyridine fragment, has a large conjugate plane, high bond energy between atoms, and has a suitable energy level between adjacent layers when used as an electron transport material and / or a charge generation material, is beneficial to electron injection and migration, can effectively reduce a driving voltage, and has a high electron migration rate, thereby improving the light-emitting efficiency of an organic electroluminescent device. The compound is used as an electron transport material and / or a charge generation material in the organic electroluminescent device, so that the driving voltage of the organic electroluminescent device is reduced, the light-emitting efficiency of the organic electroluminescent device is improved, and the service life of the organic electroluminescent device is prolonged.

The present disclosure relates to an organic compound represented by a general formula, an organic light emitting diode including the organic compound, and an organic light emitting display device. In the general formula, X is oxygen (O) or sulfur (S), and R1 to R4 are independently selected from hydrogen, deuterium, halogen, cyano, deuterated or undeuterated C1-C10 alkyl, deuterated or undeuterated C1-C10 alkoxy, deuterated or undeuterated C3-C30 cycloalkyl, deuterated or undeuterated C6-C30 aryl, deuterated or undeuterated C6-C30 arylamino and a deuterated or undeuterated C5-C30 heteroaryl group, wherein L1 and L2 are each independently selected from the group consisting of a deuterated or undeuterated C6-C30 arylene group and a deuterated or undeuterated C5-C30 heteroarylene group, wherein a and b are each independently 0 or 1, c and f are each independently an integer of 0-3, and d and e are each independently an integer of 0-2.

The invention discloses a PDA lining confined nano Ti carbon nanotube composite photocatalyst as well as a preparation method and application of the PDA lining confined nano Ti carbon nanotube composite photocatalyst. The carbon nanotube composite photocatalyst comprises uncapped multi-walled carbon nanotubes (MWCNTs) acidized by concentrated nitric acid, an inner cavity of each MWCNTs forms a through channel, and the inner wall of each MWCNTs is covered with an organic lining layer formed by thermocuring of PDA; ti nanoparticles are confined and dispersed between the organic lining layer and the inner wall of the uncapped multi-walled carbon nanotubes (MWCNTs), and are connected with the carbon skeleton through Ti-O-C bonds to obtain the PDA (at) CNTs (at) Ti composite photocatalyst. In practical application, the catalyst shows relatively strong anti-interference capability, can stably operate in a complex water body, and has relatively good reusability and catalytic stability. The method disclosed by the invention has the advantages of simple process, easily available raw materials, high catalytic activity and the like, and particularly has a wide application prospect in the aspects of water treatment and pollutant degradation.

The present application discloses a positive electrode active material and a preparation method thereof, a battery and an electrical device. The preparation method comprises: adding a lithium source, a manganese source, a vanadium source, an iron source and a phosphorus source into a liquid medium, mixing, and obtaining a positive electrode active material precursor solution; transferring the positive electrode active material precursor solution into a hydrothermal reactor in an oxygen-free gas atmosphere for reaction, cooling and filtering, washing, drying and crushing to obtain a powder material; in an oxygen-free gas atmosphere, by chemical vapor deposition, the surface of the powder material is coated with a carbon source, and the positive electrode active material is obtained after crushing. The positive electrode active material prepared by this method has a small particle size and uniform distribution, excellent performance, high quality and stable structure, and has a high voltage platform and energy density, which solves the problem of low voltage platform of currently commonly used positive electrode active materials such as lithium ferrous phosphate and low conductivity of lithium manganese iron phosphate.