2212 results about "Electron transmission" patented technology

The invention discloses a composite positive electrode material and a preparation method thereof, a positive plate and a lithium ion battery. The composite positive electrode material comprises lithium iron phosphate and a carbon coating layer coating the surface of the lithium iron phosphate, wherein the integral intensity ratio ID / IG of a D peak to a G peak of the carbon coating layer in a Raman spectrum is 0.2-0.9, and the resistivity of the composite positive electrode material is 0.1-10 omega.cm. According to the preparation method, the graphitization degree of the carbon coating layer is controlled within a proper range (ID / IG is 0.2-0.9), so that good conductivity is ensured, and structural instability caused by excessive graphitization is avoided. The moderate graphitization degree is beneficial to formation of an ordered carbon layer structure, provides more electron transport channels and reduces the potential barrier of electron migration, so that the conductivity of the composite material is greatly improved, and the resistivity is reduced to an excellent level of 0.1-10 omega.cm.

An organic electroluminescence device is provided and including a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region, wherein the emission layer may include an organometallic compound, thereby exhibiting high luminous efficiency and long service life characteristics.

The invention provides a high-stability lithium-rich manganese-based positive electrode material and a preparation method thereof, and relates to the technical field of lithium-rich manganese-based positive electrode materials, and the method comprises three steps of preparation of a homogeneous precursor, solid-state mechanical fusion doping and coating, and high-temperature sintering; a lithium-rich manganese-based precursor is prepared by adopting a homogeneous coprecipitation process, uniform distribution of metal ions is ensured, then an aluminum source, a zirconium source and a fluorine source are introduced as doping agents, phosphate and a titanate coating agent are combined, doping and coating integrated treatment is realized through mechanical ball milling, and the lithium-rich manganese-based composite material is obtained. And finally, mixing with a lithium source in an argon atmosphere, and carrying out high-temperature sintering of temperature programming and staged heat preservation to form a stable composite coating layer in situ. Therefore, manganese ion migration is effectively inhibited through lattice doping, a layered structure is prevented from being converted into spinel or rock salt phase, meanwhile, a nanoscale ion / electron transmission channel is constructed, interface impedance is reduced, and the charging and discharging efficiency under high voltage is improved.

The invention provides a binder polymer, a positive pole piece, a battery and electric equipment, the monomer of the binder polymer comprises: a rigid monomer, the rigid monomer has at least one of the following substituted or unsubstituted groups: C6-C12 aryl, C3-C11 heteroaryl, C4-C8 cycloalkyl or C3-C7 heterocyclic group; a flexible monomer, wherein the flexible monomer has a substituted or unsubstituted C2-C30 alkenyl group; and a polar monomer having an ester group. The binder polymer disclosed by the invention has good adhesion, flexibility and dispersity, and is beneficial to ion and electron transmission, so that the positive pole piece has excellent mechanical property, processability and electrochemical performance.

The invention belongs to the technical field of polymer insulating materials, and particularly discloses a high-toughness and high-insulating-strength epoxy insulating material and a preparation method thereof. Single-end amine-terminated straight-chain alkyl groups with different chain lengths in a specific molar ratio are grafted to fluorine-containing epoxy resin to construct a side chain structure, and then a step curing process is adopted to form a three-dimensional cross-linked network with a curing agent under the action of an accelerant. The fracture toughness is remarkably improved by utilizing an epoxy body chain extension effect in a side chain grafting process and a uniform microphase separation structure formed by self-assembly of a long alkyl side chain in a curing process; meanwhile, through the synergistic effect of steric hindrance of a short alkyl side chain and a fluorine atom charge trap, delocalized electron transmission of a benzene ring conjugated structure is inhibited, and the insulating property is synchronously enhanced. Compared with a traditional toughening technology, insulation deterioration caused by toughening modification is effectively avoided, and an epoxy resin material with mechanical reliability and insulation stability is provided for high-voltage electrical equipment.

The invention discloses a negative electrode interface modification material, a negative electrode plate, a positive electrode interface functional layer, a positive electrode plate, a solid-state battery and a power utilization device, and relates to the technical field of batteries, the negative electrode interface modification material comprises a first polymer matrix, a reinforcing filler, a conductive agent and a lithium salt, the modulus of the reinforcing filler is greater than 50 GPa. The tensile strength of the negative electrode interface modification material can be improved through the first polymer matrix, breakage of a negative electrode interface modification layer is reduced, interface impedance is reduced, meanwhile, the first polymer matrix can be matched with the expansion coefficient of a silicon-based material, and bulging of a negative electrode plate is reduced. The modulus of the reinforcing filler is greater than 50GPa, so that the modulus of the negative electrode interface modification layer can be improved, the expansion of the silicon-based active material is further inhibited, the conductive agent can relieve the problem that the flexible substrate interface of the copper foil and the negative electrode interface modification layer possibly causes unsmooth electron transmission, and the lithium salt can improve the ion conduction capability and reduce the interface impedance.

The invention belongs to the field of organic electroluminescence, and discloses an electron transport layer material and a preparation method and application thereof. The structure of the material of the electron transport layer is as shown in a chemical formula I: # imgabs0 #. The compound of the material of the electron transport layer provided by the invention is composed of 9-alkyl-9-phenylfluorenyl, a triazine group and cyano-substituted aryl or heteroaryl, and the groups have high electron affinity to form an efficient electron transport channel; the organic light-emitting material also has good thermal stability, and as an electron transport layer material of an organic electroluminescent device, the organic light-emitting material has the characteristics of low driving voltage, high luminous efficiency and long service life.

The invention provides an Mxene-iron molybdenum bimetallic sulfide and carbon composite material as well as a preparation method and application thereof, belongs to the technical field of sodium ion batteries, and is used for solving the technical problems of poor conductivity and rate capability of a metal sulfide negative electrode material. The preparation method of the Mxene-iron-molybdenum bimetallic sulfide and carbon composite material comprises the following steps: dissolving an iron source, a molybdenum source and a carbon source in a solvent to prepare a mixed solution; then carrying out a hydrothermal reaction to prepare a bimetallic oxide nanosphere; the bimetallic oxide nanospheres are subjected to high-temperature vulcanization treatment, and iron-molybdenum bimetallic sulfide carbon is prepared; the preparation method comprises the following steps: mixing Mxene and iron-molybdenum bimetallic sulfide and carbon through ball milling to prepare the Mxene-iron-molybdenum bimetallic sulfide and carbon composite material. The composite material disclosed by the invention can realize efficient electron transmission and provide more active sites, and is beneficial to the electrochemical reaction of the battery; the mechanical stability of the material can be enhanced, the volume expansion in the charging and discharging process is effectively reduced, the particle diffusion path between positive and negative electrodes is shortened, and the reaction kinetics of the electrode is improved; and the conductivity and the rate capability of the material can be effectively improved, so that the comprehensive performance of the sodium-ion battery is improved.

The present invention relates to a novel organic compound and an organic electroluminescent device using same and, more specifically, to an organic compound that exhibits excellent electron transport ability, heat resistance, carrier transport capability, and luminescence, and an organic electroluminescent device in which the organic compound is included in one or more organic layers, thereby improving properties such as emission efficiency, driving voltage, and lifespan.

The present invention relates to a photodetector device, comprising: • - a substrate (S); • - a first electrode (El) defined by the substrate (S) or arranged thereon; • - an electron transporting structure (ETL) arranged over the first electrode (El); • - a light-active absorbing structure (A) arranged over the electron transporting structure (ETL) and containing a quantum dot population comprising silver chalcogenide quantum dots, made to absorb at least one of infrared light, near infrared light, and short- wavelength infrared light; • - a second electrode (E2) arranged over the light-active absorbing structure (A); and • - a buffer structure (B), arranged between the electron transporting structure (ETL) and the light-active absorbing structure (A), wherein the buffer structure (B) is configured to reduce interface recombination.

The invention belongs to the field of perovskite solar cells, and particularly relates to application of a bulk phase and interface synergistic passivator in a perovskite solar cell. The invention provides a bulk phase / interface synergistic passivation innovative strategy, molecules with a tricyclic sulfur-nitrogen heterocyclic ring structure are introduced as a synergistic passivator, and defect global repair of each functional layer of a device is realized. The molecular design of the structural derivative taking phenothiazine as the core has the following advantages: skeleton characteristics: a conjugated tricyclic system forms an electron transport network through pi-pi stacking, endows molecules with excellent electron delocalization ability, and effectively regulates and controls carrier kinetics; the thioether group is used for dynamically repairing an ion migration channel through oxidation-reduction activity and inhibiting formation of deep-energy-level defects; and the secondary amine group is used as a hydrogen bond donor for anchoring uncoordinated halide ions and synchronously passivating surface and grain boundary defects.

The invention relates to the technical field of electrode materials, and discloses a preparation method of a lithium iron manganese phosphate material and a lithium ion battery. The lithium iron manganese phosphate material is prepared by the following steps: performing in-situ growth in a cavity of polyethylene glycol-sucrose hybrid aerogel with a three-dimensional porous network structure to form a manganese iron phosphate precursor; the hybrid aerogel can control excessive agglomeration and disordered growth of ferromanganese phosphate precursor particles and avoid particle agglomeration, so that the finally formed lithium ferromanganese phosphate material particles are finer and more uniformly distributed, and an amorphous carbon-aluminum layer is formed during later calcination, so that the performance of the material is improved. The surface of lithium manganese iron phosphate particles is tightly coated with the composite material, electron transmission can be accelerated, particle pulverization can be reduced, meanwhile, corrosion of corrosive components in electrolyte can be inhibited, interface side reactions such as transition metal ion dissolution can be reduced, and finally the conductivity and cycling stability of the lithium ion battery are remarkably improved.

The invention discloses an optical-grade PET release film and a preparation method and application thereof, and belongs to the technical field of PET release liners.The preparation method comprises the steps that organic silicon resin, polyacrylate and functional silicone oil serve as raw materials, hexadecafluorophthalocyanine copper serves as a catalyst, sodium hydroxide provides hydroxyl anions, and hydroxyl-containing fluorinated hydroxyaniline is obtained; amino groups on the surface of fluorinated hydroxyaniline react with carboxyl groups of graphene oxide and are grafted on the surface of graphene oxide, then hydroxyl groups in the fluorinated hydroxyaniline and carboxyl groups of acrylic acid are subjected to esterification reaction under the action of a catalyst, so that acrylic acid is grafted on fluorinated modified graphene oxide, and the fluorinated modified graphene oxide is obtained. Therefore, hydroxyl and epoxy functional groups on the surface of the graphene oxide are consumed, hindering of electron transmission is reduced, the conductivity of the release film is improved, and the antistatic requirement of the release film is met.

The invention provides a carbon-based negative electrode material, a preparation method, a secondary battery and an electric device. The carbon-based negative electrode material is granular and comprises a carbon-based core and a coating structure, the coating structure comprises a fast ion conductor layer and a stable modification layer which are sequentially arranged on the surface of the carbon-based core, the fast ion conductor layer is arranged on the surface of the carbon-based core, and the stable modification layer is arranged on the surface of the fast ion conductor layer; the stable modification layer has electron and ion transmission capability and has self-supporting performance through chemical bonding connection in the layer so as to protect the fast ion conductor layer. A negative electrode of a secondary battery includes a carbon-based negative electrode material. The power utilization device comprises a secondary battery. The stable modification layer has relatively good ion electron transmission capability and structural stability, and can improve the retention rate of the fast ion conductor layer in the negative electrode material processing process and the battery operation process, so that the structural integrity of the negative electrode active material is protected, and the stability of the battery performance is improved.

The invention provides an electrochemical biosensor for detecting mycoplasma pneumoniae, the core of the electrochemical biosensor comprises a specific capture probe, and the nucleotide sequence of the specific capture probe is a complementary sequence of a 23S-5S rDNA spacer sequence (ITS) of the mycoplasma pneumoniae. In the preparation link, the porous membrane is used as a high-efficiency electron transmission channel, the process is remarkably simplified, and the reaction efficiency is improved. By virtue of a capture probe taking 23S-5S rDNA ITS as a target, the sensor is endowed with excellent specificity and high sensitivity, so that the sensor has excellent performance in complex biological sample detection, can accurately and efficiently recognize a target object and effectively avoids interference of other substances. The electrochemical biosensor is easy and convenient to operate and high in response speed, has wide application prospects in the fields of clinical diagnosis and rapid disease screening, can provide key technical support for timely diagnosis of mycoplasma pneumoniae infection, greatly meets the urgent requirements for rapid and accurate detection in clinical and practical application, and has good application prospects. The development process of a biological detection technology in the mycoplasma pneumoniae detection direction is powerfully promoted.

The invention discloses a high-performance lithium-rich manganese oxide positive electrode material, a preparation method thereof and application of the high-performance lithium-rich manganese oxide positive electrode material to an all-solid-state battery. The lithium-rich manganese oxide positive electrode material coats / composites a lithium-rich manganese positive electrode base material and a lithium ion conductor or a conductive agent in situ through a freeze-drying method. In-situ coating / compounding of a lithium ion conductor or a conductive agent on the lithium-rich manganese oxide positive electrode material is realized through freeze drying, the interface impedance is effectively reduced, the interface stability is improved, and the lithium ion and electron transmission efficiency is improved. The lithium-rich manganese oxide positive electrode material prepared by the invention can inhibit the release and side reaction of lattice oxygen in the cycle process, and improve the structural stability and cycle life of the material; meanwhile, the freeze-drying method can maintain the nano dispersity and uniformity of the material, full solid-solid contact between the lithium-rich manganese material and a lithium ion conductor or a conductive agent is realized, and the high specific capacity of the lithium-rich manganese positive electrode material in all-solid-state battery application is ensured. The prepared lithium-rich manganese-based all-solid-state battery has the reversible specific capacity as high as 273 mAh / g, the bottleneck that the capacity release of the lithium-rich manganese oxide positive electrode material in an all-solid-state battery system is limited is broken through, the strategy provides a new design thought and technical path for the construction of the high-specific-energy all-solid-state battery positive electrode material, the adopted process is simple and controllable, and the method is suitable for industrial production. The method is suitable for large-scale preparation.

The invention discloses a preparation method of a negative electrode material of a sodium ion battery, a negative electrode plate containing the negative electrode material and the sodium ion battery, and the negative electrode material is prepared by taking biomass waste semen cassiae as a carbon precursor and montmorillonite as a template and combining an in-situ fluorine ion exchange and carbonization process. The preparation method comprises the following steps: mixing semen cassiae with montmorillonite, removing a template, and carrying out fluorine ion exchange to obtain the fluorine-doped three-dimensional porous carbon composite material. According to the material, micro / mesopore distribution is regulated and controlled through a confinement effect between montmorillonite layers, uniform doping of fluorine elements is realized, and an electronic structure and a pore channel system are synergistically optimized. The composite material has rich sodium storage active sites, efficient ion / electron transmission paths and stable interface characteristics, can significantly improve the specific capacity, rate capability and cycle life of the sodium-ion battery, and has important application value in the field of sodium-ion battery negative electrode materials.

The invention discloses an organic carbonyl compound electrode material, a preparation method and application of the organic carbonyl compound electrode material in a lithium ion battery, and the organic carbonyl compound electrode material is bipyridino [3 ', 2': 5, 6; the invention relates to an organic carbonyl compound electrode material, which is prepared from 2, 2 ', 3': 7, 8] quinoxaline [2, 3-i] bipyridino [3, 2-a: 2 ', 3'-c] phenazine-10, 21-diquinone and 1, 2, 4, 5-tetraamino p-benzoquinone and 1, 10-phenanthroline-5, 6-diketone through a dehydration condensation reaction. When the organic electrode material is used as a positive electrode material to be applied to a lithium ion battery, due to the fact that the organic electrode material contains a large conjugated system, the organic electrode material has good dissolution inertness in electrolyte and is beneficial to electron transmission, and therefore the cycling stability and the rate performance of the battery are improved. In addition, multiple active sites provide more redox active sites to coordinate with lithium ions, so that reversible lithium storage is realized, and relatively high capacity is shown.

The invention discloses a graphite diacetylene / copper oxide composite material cocatalyst and a co-production preparation process and application thereof. Graphite diyne has a two-dimensional layered structure and is composed of sp and sp hybridized carbon atoms, a periodically distributed structure is formed, and excellent electron transmission performance and pore structure are shown. An existing graphite diacetylene synthesis method is complex and high in cost, large-scale application of the graphite diacetylene in the industrial field is seriously restricted, the potential value of a copper catalyst cannot be fully exerted, and resource waste is caused. According to the invention, through a simple and efficient co-production process, co-production of graphite diyne and copper oxide nanoparticles is realized for the first time, and the graphite diyne / copper oxide composite material is successfully prepared. The novel composite material can be used as a cocatalyst to effectively improve photocatalytic hydrogen production, and the hydrogen production performance can be comparable with that of noble metal photocatalysts such as Pt. The problems of tedious steps, high energy consumption, low yield and the like in a traditional preparation method are solved, and the preparation method has important application value in the field of high-performance photocatalysis.

The invention discloses a preparation method of a noble metal doped ultrathin hydroxide nano-cluster type electro-catalytic material, and relates to a preparation method of a noble metal doped hydroxide electro-catalytic material. The invention aims to solve the technical problems of high cost, complex preparation process and no environmental protection of the existing electro-catalytic material. The method comprises the following steps: putting foamed nickel into a mixed solution of persulfate and transition metal salt for hydrothermal reaction to obtain an intermediate; and putting the intermediate into a noble metal salt solution for hydrothermal reaction to obtain the noble metal doped ultrathin hydroxide nano-cluster type electro-catalytic material. The prepared material has an ultrathin nano-cluster structure, and is high in electron transmission rate and hydrogen evolution reaction rate. In a 1M KOH aqueous solution, the overpotential is 68-98mV under 10mA. Cm <-2 >, the Tafel slope is 96.8-112.3 mV dec <-1 >, and the composite material can be used in the field of hydrogen production by electrolyzing water.

The invention discloses a compound containing triazine and spiroanthracene fluorene structures and an organic electroluminescent device thereof, and belongs to the technical field of semiconductor materials. The compound containing the triazine and spiroanthracene fluorene structure is shown as a general formula (1): # imgabs0. The compound containing the triazine and spiroanthracene fluorene structure is applied to an organic thin film layer of an organic electroluminescent device, and is particularly applied to a hole blocking layer in an electron transmission region thin film layer of the organic thin film layer. The compound containing the triazine and spiroanthracene fluorene structure has good stability and good hole blocking capability, and when the compound containing the triazine and spiroanthracene fluorene structure is used as a material of an organic electroluminescent device, the efficiency of the device is remarkably improved, and the service life of the device is remarkably prolonged.

The invention discloses a binder system with an electron and ion conduction function and application thereof. The binder system comprises 1) a cross-linking agent containing an ethyoxyl unit and 2) a polymer with electron conduction or electron and ion conduction functions, and the cross-linking agent and the polymer respectively have groups which are cross-linked under light and / or heat conditions; when in use, light and / or heat are utilized to initiate a cross-linking reaction, so that the polymer is cross-linked in situ by the cross-linking agent, and a three-dimensional binder network structure for ion and electron transmission is formed. According to the binder system disclosed by the invention, the polymer is subjected to in-situ crosslinking by utilizing the cross-linking agent to form a three-dimensional binder network structure, the polymer is used as a conjugated main chain for providing electron transmission, and the cross-linking agent is used as a flexible cross-linking chain segment beneficial to ion diffusion, so that the mechanical property of the binder is improved to the greatest extent while the high adhesive force of the binder is ensured; enough mechanical properties are provided for a battery pole piece to maintain the integrity of an electrode, so that the cycling stability of the high-specific-capacity negative electrode material is improved.

The invention discloses a constructed wetland microbial fuel cell coupling device based on a novel three-dimensional electrode, and belongs to the technical field of sewage treatment, the device comprises a shell, and a bottom layer, an anode layer, a middle layer and a cathode layer are sequentially arranged in the shell from bottom to top. Wherein the bottom layer is filled with coarse gravels, and the middle layer is filled with fine gravels; the anode layer consists of a plurality of titanium tubes which are horizontally arranged and a titanium mesh for connecting the titanium tubes in parallel; openings are formed in the two ends of the titanium tube, through holes are formed in the titanium tube in an array mode, and the titanium tube is filled with a graphite felt core formed in a curled mode. The graphite felt core body can be used for a conductive material strengthening process and can also be used as a supporting material, and compared with an anode cage structure formed by a stainless steel net, the bearing strength is higher; the resistance of the metallic titanium is lower than that of the stainless steel mesh, so that electron transmission and improvement of electron transfer efficiency are facilitated, and the energy recovery efficiency and pollutant removal efficiency of the constructed wetland microbial fuel cell coupling device can be effectively improved.

The invention provides a perovskite solar cell and a preparation method thereof, the perovskite solar cell comprises a substrate, a conductive anode, a hole transport layer, a perovskite light absorption layer, an electron tunneling protection layer, a hole barrier layer and a conductive cathode which are stacked in sequence, and the material of the electron tunneling protection layer comprises aluminum oxide and / or molybdenum oxide; the hole blocking layer is made of tin oxide and / or IZO. According to the invention, the electron tunneling protection layer is arranged between the perovskite light absorption layer and the hole blocking layer, so that the damage to perovskite in the process of depositing the buffer layer of the hole blocking layer is blocked, and the stability of the cell is greatly improved; and tin oxide and / or IZO can be directly deposited without using C60, so that the manufacturing cost is greatly reduced, and a device with higher stability is obtained.

The invention relates to the technical field of metal materials, and discloses a composite metal material based on micro-nano porous copper powder, which is composed of the following components: a matrix is micro-nano porous copper powder with the particle size of 50-500 nanometers, the porosity is 30-80%, and the pore diameter is 20-200 nanometers; the metal additive comprises 5-20 wt% of aluminum powder and 3-15 wt% of nickel powder; the functional additive comprises 1 to 8 weight percent of titanium powder, 0.5 to 5 weight percent of graphene and 0.3 to 3 weight percent of a carbon nano tube; a nickel-titanium alloy coating with the thickness of 50-500 nanometers is formed on the surface of the micro-nano porous copper powder through electrochemical deposition. Through the graded hole design of the micro-nano porous copper powder, a main hole channel provides a rapid electron transmission path, the powder gap stress is eliminated in the low-temperature pre-pressing stage, and atom diffusion and densification are promoted in the high-temperature and high-pressure stage, so that the resistance can be effectively reduced, the loss of energy in the transmission process is reduced, and the energy transmission efficiency of the whole system is improved.

The invention discloses a micro-positive pressure hydrogen environment in-situ stress-strain testing device and method. The device comprises a sealed reaction cavity which can be placed in a scanning electron microscope sample cabin; the loading device is arranged in the cavity and is used for fixing and applying a load; the atmosphere control system is communicated with the cavity and is used for introducing gas and maintaining a micro-positive pressure state; an electron transmission window arranged on the cavity, wherein an electronic transparent film packaged by the electron transmission window can maintain air tightness under micro-positive pressure and allows electron beams to penetrate through; and the heating module is arranged in the cavity. The method comprises the following steps: loading and sealing a sample, establishing a micro-positive pressure atmosphere, heating the sample, starting loading, and synchronously carrying out SEM real-time imaging and data recording. The problem that a traditional SEM in-situ device cannot work in a real micro-positive pressure hydrogen and high-temperature environment is solved, and synchronous visual in-situ observation of material microstructure evolution and macromechanical response under the gas-heat-force multi-physics field coupling condition is achieved.

The invention provides a lithium iron phosphate positive electrode material and a preparation method thereof, a positive electrode plate, a lithium ion battery and electric equipment, and relates to the technical field of new energy. The lithium iron phosphate positive electrode material disclosed by the invention has a unique secondary particle structure, a graphene conductive skeleton and a carbon coating layer, so that the powder resistance of particles can be greatly reduced, electron transmission in the material is facilitated, and the polarization effect is reduced. According to the preparation method of the lithium iron phosphate positive electrode material, two-fluid spray drying is adopted, graphene sheets already exist in spray solid spheres after spray drying, then carbon coating and nitrogen protection sintering are performed, and spherical lithium iron phosphate secondary particles with a graphene conductive framework and a carbon coating layer are obtained. Compared with the conventional lithium iron phosphate preparation method comprising a crushing step, the lithium iron phosphate preparation method has the advantages that the damage to the carbon coating layer in the crushing process is avoided, and the rate capability of the material is improved.

An object of one embodiment of the present invention is to provide a multicolor light-emitting element that utilizes fluorescence and phosphorescence and is advantageous for practical application. The light-emitting element has a stacked-layer structure of a first light-emitting layer containing a host material and a fluorescent substance, a separation layer containing a substance having a hole-transport property and a substance having an electron-transport property, and a second light-emitting layer containing two kinds of organic compounds that form an exciplex and a substance that can convert triplet excitation energy into luminescence. Note that a light-emitting element in which light emitted from the first light-emitting layer has an emission spectrum peak on the shorter wavelength side than an emission spectrum peak of the second light-emitting layer is more effective.

The invention relates to the technical field of electroluminescence, and discloses a laminated organic light-emitting device and application thereof, and the laminated organic light-emitting device comprises an anode layer, a first light-emitting unit, an electron transport layer, an interface modification layer, a connection layer, a second light-emitting unit and a cathode layer which are sequentially arranged from bottom to top; the electron transport layer comprises a hole blocking layer and an n-type electron transport layer; wherein the n-type electron transport layer is composed of an n-type dopant and an organic electron transport material, has the functions of electron transport, charge separation and injection and regulation and control of the optical microcavity effect of the laminated device, can simplify the electron transport and connection layer structure of the laminated device, and effectively improves the conductivity of the laminated device; according to the laminated organic light-emitting device, the voltage drop of the body is obviously reduced, and the interface electron injection barrier is reduced, so that the laminated organic light-emitting device has the advantages of low driving voltage, high efficiency and long service life, and the effect of adjusting the optical microcavity of the device can be achieved by utilizing the n-type electron transport layer.

The invention provides a negative electrode and a preparation method thereof, a battery and electric equipment. The negative electrode comprises a negative electrode current collector and a negative electrode active material layer arranged on the surface of the negative electrode current collector, the negative electrode active material layer comprises graphite, the orientation value of the negative electrode active material layer is less than or equal to 3, and the binding force between the negative electrode current collector and the negative electrode active material layer is greater than or equal to 0.25 N / 40mm. The negative electrode has excellent ion and electron transmission capability and good internal stability, is favorable for being used in the battery, improves the charge-discharge rate and the cycle capacity retention rate of the battery, and prolongs the service life of the battery.