373 results about "Plasma technology" patented technology

The invention discloses an efficient and energy-saving industrial air purification system and method, and particularly relates to the technical field of air purification. The burden of the subsequent stage is reduced by introducing the primary treatment of the low-resistance filter; a dynamic plasma technology and a nano-porous adsorption material are combined, so that deep purification of complex pollutants is realized; by utilizing an intelligent monitoring and control technology, equipment operation parameters are adjusted in real time so as to optimize the purification efficiency; waste heat is recovered through a heat exchange technology, and energy consumption stability is evaluated; according to the energy consumption condition, the operation intensity is dynamically adjusted or clean gas is recycled and discharged, the removal efficiency of pollutants in high-temperature and high-speed airflow is remarkably improved, the service life of equipment is prolonged, the energy consumption of the system is reduced, and long-term stable and efficient operation of the industrial air purification system is ensured.

The invention belongs to the technical field of solid-state battery materials, and discloses an inorganic solid-state electrolyte lanthanum lithium zirconate surface interface non-metallic element doped modified material using a plasma technology and a preparation method and application thereof, which can reduce the interface impedance of an electrolyte and improve the electrochemical performance of the electrolyte. By using the plasma technology, impurities such as lithium carbonate and the like on the surface of the inorganic solid electrolyte lanthanum lithium zirconate can be etched, a lithium-loving protective layer can be generated in situ on a surface interface, and the air stability of the electrolyte block is improved. According to the invention, multi-aspect modification can be realized by combining a plasma technology with a plurality of non-metallic element excitation sources, corresponding gain protection layers can be formed according to different requirements, and performance exertion of the battery in different fields is facilitated. When the inorganic solid electrolyte lanthanum lithium zirconate modified material obtained by the method disclosed by the invention is in contact with lithium metal to form a battery, the inorganic solid electrolyte lanthanum lithium zirconate modified material shows relatively low interface contact resistance and excellent cycling stability, and has a good application value.

The invention discloses a phase change energy storage waterborne polyurethane nanofiber membrane and a preparation method thereof. Lignin-based phase change microcapsules are prepared by combining ultraviolet crosslinking with lignin shell packaging, and then the nanofiber membrane containing the phase change microcapsules is prepared through an electrostatic spinning technology. And finally, constructing the waterborne polyurethane phase change fiber membrane with asymmetric wettability through a low-temperature plasma technology. According to the invention, lignin is self-assembled to form nanoparticles, and ultraviolet light induces free radical polymerization to form a polymer film, so that the packaging capability of the phase change material is improved. The phase change microcapsule prepared by the method is high in packaging efficiency and excellent in phase change performance, the preparation process is green and environment-friendly, the technological operation is simple, the temperature of the prepared phase change energy storage waterborne polyurethane nanofiber membrane conforms to the comfortable temperature range of a human body, and the phase change energy storage waterborne polyurethane nanofiber membrane has excellent temperature regulation, waterproof and moisture permeable performance and is suitable for being used in the field of water treatment. Good application prospects are realized in the field of functional textiles with functions of intelligent temperature regulation, water resistance and air permeability and the like.

The invention relates to the technical field of rare earth metal electrolysis cathode protection coatings, in particular to a high-temperature-corrosion-resistant yttrium-stabilized zirconia gradient coating on the surface of a tungsten cathode. A metallurgically bonded strong bonding bottom layer is constructed on a tungsten substrate through surface pretreatment and reactive sintering, then an atmosphere plasma technology is adopted to spray a creep-resistant gradient layer with continuous components to buffer thermal stress, and finally a sol-gel technology is utilized to construct an extremely compact corrosion-resistant surface layer in a superposition mode. The high-temperature-corrosion-resistant yttrium-stabilized zirconia gradient coating is constructed through a multi-scale and multi-mechanism synergistic effect, the problems that a tungsten cathode coating is insufficient in binding force and poor in thermal shock resistance are fundamentally solved, molten salt permeation can be blocked, and the service life of a tungsten cathode in a severe environment is remarkably prolonged.

The invention belongs to the technical field of halide solid-state electrolyte, and relates to a high-conductivity and high-lithium-stability modified halide solid-state electrolyte material constructed by solid source plasma, and a preparation method and application of the high-conductivity and high-lithium-stability modified halide solid-state electrolyte material. According to the preparation method, a halide solid electrolyte is taken as a matrix, halogenated ammonium salt is taken as a solid source, and the halide solid electrolyte is subjected to synergistic doping modification of elements such as nitrogen, fluorine / chlorine / bromine and the like by utilizing a plasma technology, so that the modified halide solid electrolyte material is obtained. The modified halide solid electrolyte material shows excellent conductivity and lithium-lithium symmetrical battery performance, and has a wide market application prospect. Meanwhile, the preparation method provided by the invention is simple, rapid, efficient and convenient, is easy to control, and contributes to promoting the development and application of the high-performance halide solid electrolyte material.

The invention relates to the technical field of plasmas, in particular to a remote plasma source working point judgment method, device and equipment and a medium. The mass spectrum dissociation rate is calculated according to the first mass spectrum and the second mass spectrum; calculating a spectral dissociation rate according to the spectrogram; performing correction calculation on the mass spectrum dissociation rate and the spectral dissociation rate based on the initial prior Gaussian distribution model to obtain a corrected dissociation rate; when the corrected dissociation rate meets the dissociation rate required by the process, calculating an actual reaction rate according to the spectrogram and a preset emission peak height threshold value; when the actual reaction rate is equal to the reaction rate threshold value, a feedback signal reaching the process working point is generated; mass spectrum data and spectral data are mutually verified in real time, the contradiction between single-mode detection precision and process compatibility is overcome, errors such as signal attenuation, interference and peak overlapping are reduced, the reliability of dissociation rate detection is remarkably improved, meanwhile, a working point is judged in combination with correction of the dissociation rate and the actual reaction rate, stability control is enhanced, and the process precision and the yield are improved.

The invention provides a preparation method and application of a fluorine-free sand streak agent. The preparation method of the fluorine-free sand streak agent comprises the following steps: S11, activating the surface of PMMA micro powder by utilizing a low-temperature plasma technology; s12, dispersing the activated PMMA micro powder in an organic solvent to obtain a reaction solution A; dispersing an acrylic monomer in an organic solvent to obtain a reaction solution B; dispersing an initiator in an organic solvent to obtain a reaction solution C; and S13, under the protection of nitrogen, introducing the reaction liquid A, the reaction liquid B and the reaction liquid C into a micro-channel reactor for graft copolymerization, cleaning and drying to obtain the PMMA micro powder with acrylic acid grafted on the surface.

The invention discloses a fuel cell rapid activation method, and relates to the technical field of fuel cells, and the activation method comprises the steps of early-stage preparation, electrode pretreatment, activation reagent injection, activation treatment, post-treatment and evaluation and optimization. The method has the advantages that the electrochemical impedance spectrometer is used for state inspection of the electrode and other components in the electrode pretreatment stage, the reliability of the fuel cell to be detected is ensured, the surface of the electrode is deeply cleaned through the cleaning agent and the ultrasonic cleaning machine, dust, oil stains and impurities on the surface of the electrode can be effectively removed, and the detection accuracy is improved. Meanwhile, the microstructure and chemical composition of the surface of the electrode are improved by utilizing a plasma technology, and the catalytic activity and corrosion resistance of the electrode are improved, so that the activation efficiency and the operation stability of the fuel cell are improved, and potential abnormities can be found and treated in time by evaluating the performance in real time; and the fuel cell is ensured to operate in an optimal state.

The invention provides an unmanned aerial vehicle based on the plasma technology and a control method thereof, and relates to the technical field of unmanned aerial vehicles, the unmanned aerial vehicle comprises a fuselage, a power system, a control system and a plasma generation device, and the plasma generation device is installed on the surface or a specific position of the unmanned aerial vehicle. The aerodynamic performance, the stealth performance and the anti-interference capability of the unmanned aerial vehicle are improved by generating the plasma layer, the plasma layer can reduce air resistance and improve flight efficiency, meanwhile, the stealth effect is achieved by adjusting plasma parameters, the radar reflection area is reduced, and the anti-interference capability of the unmanned aerial vehicle is improved. The invention further provides an unmanned aerial vehicle control method based on the plasma technology, accurate regulation and control of the plasma layer are achieved through an intelligent algorithm, stability and high efficiency of the unmanned aerial vehicle under different flight conditions are ensured, and the technology can be widely applied to the fields of military reconnaissance, disaster monitoring, logistics transportation and the like and has wide application prospects. The method has remarkable technical advantages and application prospects.

The invention discloses a method for performing tar steam reforming by coupling low-temperature plasma with a nickel-loaded hydrogen type molecular sieve composite catalyst. The method comprises the following steps: preparing the nickel-loaded hydrogen type molecular sieve composite catalyst; the mass of Ni in the nickel-loaded hydrogen type molecular sieve composite catalyst accounts for 5-30% of the mass of the catalyst; introducing tar and water vapor into a dielectric barrier discharge plasma reactor filled with the nickel-loaded hydrogen type molecular sieve composite catalyst; starting the dielectric barrier discharge plasma reactor, and carrying out a tar steam reforming reaction; wherein the temperature of the tar steam reforming reaction is 150-525 DEG C, and the power of the tar steam reforming reaction is 30-90 W. The catalyst disclosed by the invention is coupled with a low-temperature plasma technology, so that good tar reforming performance, target product selectivity and system stability are realized.

The utility model discloses a plasma generating device and electrical equipment, and relates to the plasma technology field, the plasma generating device comprises a dielectric layer, a first electrode and a second electrode, the dielectric layer is provided with a first plane and a second plane which are arranged back to back; at least part of the first electrode is arranged to be a first extension section, and the first extension section is arranged on the first plane or spaced from the first plane; at least part of the second electrode is arranged to be a second extending section, the second extending section is provided with a plane attached to the second plane or arranged opposite to the second plane, and the first extending section and the second extending section are arranged in a separated mode through the dielectric layer. According to the technical scheme, the generation position of the plasma in the plasma generation device can be controlled.

The utility model discloses a plasma generating device and electrical equipment, and relates to the plasma technology field, the plasma generating device comprises a dielectric medium structure, a first electrode and a second electrode, the dielectric medium structure wraps the second electrode, a part of the dielectric medium structure is arranged to be a plane dielectric layer, and the first electrode wraps the second electrode. The first electrode is arranged on the side, away from the second electrode, of the plane dielectric layer. According to the technical scheme, the plasma generating device can be prevented from being too large in size under the condition that the plasma generating device is safely used.

The invention belongs to the technical field of plasmas, and particularly relates to a magnetic lens constraint focusing reaction ion beam source which can obtain a focusing ion beam with ion energy in normal distribution and introduce reaction gas to realize rapid removal of a damaged layer on the surface of an optical element. According to the technical scheme, the ion source comprises an anode, an outer cathode arranged above the anode and a center cathode arranged in the middle of the ion source, the anode, the outer cathode and the center cathode are special-shaped circular rings, an ion beam leading-out gap is formed between the outer cathode and the center cathode, an ionization area is arranged among the anode, the outer cathode and the center cathode, and the ionization area is arranged between the anode and the center cathode. An ionization magnetic coil is arranged on the outer side of the anode, a working gas leading-in device is arranged below the center cathode, a magnetic lens center magnetic pole is arranged above the center cathode, a reaction gas leading-out hole is formed in the middle of the magnetic lens center magnetic pole, and reaction gas is led into the magnetic lens center magnetic pole through the center cathode by a gas guide pipe. A magnetic lens coil is arranged on the periphery of the magnetic lens center magnetic pole, and a magnetic lens outer magnetic pole is arranged above the magnetic lens coil.

The present invention discloses a plasma generating device and an electrical device, which relate to the field of plasma technology, wherein the plasma generating device comprises a dielectric structure, a first electrode and a second electrode, the dielectric structure covers the second electrode, a part of the dielectric structure is arranged as a planar dielectric layer, and the first electrode is arranged on a side of the planar dielectric layer away from the second electrode. The technical solution of the present application can avoid the plasma generating device from being too large in size under the condition of safe use of the plasma generating device.

The invention relates to the technical field of preparation of high-performance carbon materials, in particular to a method for preparing high-quality vertical graphene by coupling a plasma technology and a Joule thermal technology. The invention provides a method for preparing high-quality vertical graphene by using a plasma coupling Joule heat technology. The instantaneous high temperature of Joule heat is utilized, and in the vertical graphene growth process, instantaneous high-temperature treatment is discontinuously carried out on a carrier and a vertical graphene film to regulate and control the growth quality of graphene. When the method for preparing the high-quality vertical graphene by using the plasma coupling Joule heat technology is adopted for treatment, after the Joule heat is coupled, the morphology of the vertical graphene is not influenced, and the ID / IG of the grown vertical graphene is obviously reduced from 1.26 to 0.98, which shows that the graphitization degree of the vertical graphene is greatly improved, and the performance of the vertical graphene is greatly improved. The defects in the growth process are reduced, so that the infrared heat dissipation capability of the graphene is improved.

The invention relates to the technical field of plasma, and discloses an electrode fault recognition system and method and a machine readable storage medium. The system comprises: an auxiliary electrode; the electrode displacement device is used for moving the auxiliary electrode to a preset position which is a preset distance away from the to-be-identified electrode, and the auxiliary electrode at the preset position and the to-be-identified electrode form a to-be-identified electrode pair; the voltage detection device is used for detecting the initial discharge voltage of the to-be-identified electrode pair in a preset detection environment when the to-be-identified electrode is in a detection state and the auxiliary electrode moves to a preset position, and the detection state is a state that the to-be-identified electrode discharges in response to the initial discharge voltage; and the control device is used for determining whether the to-be-identified electrode has a fault or not according to the initial discharge voltage and the safety threshold interval. According to the invention, fault detection of any electrode can be realized without dismounting the plasma reactor, the judgment result is more accurate and reliable, and the period and cost of manual maintenance are reduced.

The invention belongs to the technical field of microwave plasmas, and particularly relates to a magnetized atmospheric pressure pulse microwave plasma jet discharger. The discharger is reasonable in design, microwave energy is fed into the discharge chamber through the SMA interface, high electric field intensity is formed at the tip of the hollow needle electrode, and fed working gas is disrupted and discharged; a magnet exciting coil outside the quartz tube generates an axial magnetic field inside the quartz tube through direct current, electrons do spiral cycloid motion in an electromagnetic field, and electron cyclotron resonance can be achieved under the field. Through magnetic field constraint, high-energy electrons are constrained in a core area, a motion path is prolonged, effective collision times are increased, gas dissociation efficiency and ionization degree are improved, and collision loss of the electrons and a wall surface is reduced; the plasma jet performance is improved; the device works in an atmospheric pressure environment, does not need a vacuum system, reduces equipment cost and maintenance difficulty, reduces electrode sputtering and cavity corrosion, and prolongs the service life of core components.

The invention discloses a single-walled carbon nanotube and a preparation method and device thereof, and belongs to the technical field of nano materials. The device comprises an inert gas cylinder, a carrier gas injection pipeline, a gas flow controller, a cavity, a positive electrode bar, a negative electrode bar, two graphite felt electrodes woven with carbon fibers, a stainless steel screen, a filter membrane, a graphite table and a tubular furnace. When the electrode starts to discharge and the temperature of the high-temperature plasma gasification area reaches the gasification temperature of the solid carbon source and the solid catalyst, the solid carbon source and the catalyst start to be gasified, gasified reactants enter the sample growth area along with the inert gas flow to grow, and the grown single-walled carbon nanotubes reach the sample deposition area along with the gas flow. The device disclosed by the invention can generate uniform, stable and high-capacity ultrahigh-temperature plasma under normal pressure and relatively low voltage and current, and the simple and practical plasma technology is low in energy consumption, green and environment-friendly, can be used for macro preparation and is beneficial to overcoming the challenge of high-temperature synthesis.

The invention belongs to the technical field of low-temperature plasma, and particularly relates to a low-temperature injection type AP plasma treatment device which comprises a machining table and a silicon wafer material plate arranged on the surface of the machining table and further comprises a low-temperature cleaning assembly arranged on the surface of the machining table. Position movement of the movable frame on the fixed frame is achieved more flexibly, an operator does not need to hold a silicon wafer by hand to clean the surface of a silicon wafer material, meanwhile, it needs to be guaranteed that the silicon wafer is cleaned more evenly, labor input is saved, cleaning efficiency is improved, and under pushing of a hydraulic cylinder, the distance between a plasma cleaning spray head and the silicon wafer can be adjusted, so that cleaning efficiency is improved. The plasma spraying distance can be conveniently adjusted, the surface of a silicon wafer can be better cleaned, the surface of the silicon wafer can be comprehensively cleaned by installing a moving assembly, the use effect is good, a fixing assembly is arranged, a silicon material plate is placed on the surface of a machining table, a clamping plate is tightened downwards under the tension of a spring, and therefore the machining efficiency is improved. And the silicon material plate on the processing table is fixed.

The invention relates to the technical field of waste gas treatment, and particularly discloses a purification treatment device suitable for chemical waste gas stink and a treatment method thereof.The purification treatment device comprises an acid pickling tower, an alkaline washing tower, a heat exchange washing tower, a demister, pulse plasma equipment and a water washing tower which are sequentially communicated; acid or alkaline malodorous components in waste gas are removed through an acid-base neutralization reaction of the acid washing tower and the alkaline washing tower, soluble malodorous gas is further removed by spraying a washing solution in the heat exchange washing tower, liquid drops in the waste gas are removed by the demister, and the liquid drops are prevented from carrying pollutants and entering pulse plasma equipment to influence the plasma treatment effect. The pulsed plasma technology intensified decomposition has efficient treatment capacity on refractory malodorous substances, the overall treatment efficiency is remarkably improved, residual pollutants in the waste gas are further removed by spraying clear water in the water scrubber, tail end purification is guaranteed, standard emission of the waste gas is guaranteed, and the malodorous treatment efficiency of the chemical waste gas is improved.

The invention discloses a plasma generating device and electrical equipment, and relates to the technical field of plasmas, the plasma generating device comprises a reaction module and a display structure, the reaction module comprises a first electrode and a second electrode, and the first electrode and the second electrode are arranged at an interval; the display structure comprises at least one of a temperature-sensitive color changing structure, an ultraviolet color developing structure and a rare gas light emitting structure, and the display structure has a first display state and a second display state; wherein the display structure can be in a first display state in response to physical radiation generated when the plasma is generated, and the display structure is in a second display state when the plasma generating device does not work. According to the technical scheme, the working state of the plasma generating device is visualized.

The invention relates to the technical field of printing and packaging, and discloses a printing ink spraying process for a color printing carton, which comprises the following steps: step 1, carton surface pretreatment: carrying out cleaning and micropore treatment on the carton surface, removing surface impurities by adopting an ultrasonic cleaning technology, and drying the carton surface; a micron-sized concave-convex structure is formed on the surface of the carton by using a low-temperature plasma technology, and the surface roughness range is Ra 1-3 microns, so that the adhesive force between the ink and the surface of the carton is enhanced; the basic ink and a functional additive are mixed in proportion according to the design pattern requirement, and the functional additive comprises nano zinc oxide particles with the mass fraction of 0.5%-2% and is used for improving the weather resistance and the antibacterial performance of the ink. The surface of the carton is subjected to special pretreatment, the adhesive force of printing ink is remarkably improved, the durability and stability of printed patterns are enhanced, high-precision pattern spraying is achieved through the intelligent image recognition and piezoelectric ink jet technology, the complex design requirement is met, and the printing quality is improved.

The invention relates to the technical field of plasmas, and discloses a cascade type plasma generator, which comprises a cathode assembly, a cathode seat, a cascade assembly and an anode, and is characterized in that the cathode assembly comprises an arc striking needle, an electron emission needle and an elastic connecting piece, and the arc striking needle is elastically connected with the electron emission needle through the elastic connecting piece and is slidably arranged in a sliding channel in a penetrating manner; the elastic connecting piece is compressed, so that the bottom end of the arc striking needle protrudes out of the bottom end of the electron emission needle, and during arcing, ionization of the working gas is realized through point discharge of the arc striking needle so as to generate plasma; the elastic compression part is released, so that the bottom end of the electron emission needle protrudes out of the bottom end of the arc striking needle, electrons are emitted by the electron emission needle, the arc striking needle is prevented from being always located in a cavity where gas is ionized, the problems of accumulation of a large amount of impurities and melting of the needle point of the arc striking needle are solved, the replacement frequency of the arc striking needle is reduced, and the replacement efficiency is improved. The device maintenance cost is reduced and the normal operation of the experiment is ensured.

The invention belongs to the technical field of PVC material processing, and discloses a cable sheath PVC material waterproof protection treatment method and application, the method comprises the following steps: using carbon tetrafluoride as a working medium gas for plasma discharge, using a predefined plasma modification platform and combining a dielectric barrier discharge technology to carry out modification treatment on a PVC material, and obtaining a modified PVC material; the modified polyvinyl chloride material is obtained; carrying out physical and chemical property test on the modified polyvinyl chloride material to obtain a surface energy change state, carrying out hydrophilic angle test on the modified polyvinyl chloride material based on the surface energy change state, and regulating the hydrophilicity of the polyvinyl chloride material according to a hydrophilic angle test result; and sequentially carrying out pulse current attenuation test and breakdown voltage band test on the modified polyvinyl chloride material by utilizing a pulse current attenuation technology. Fluorination treatment is performed on the PVC surface through a CF4 plasma technology, so that the hydrophobicity and weather resistance of PVC are effectively improved.

The invention relates to the field of plasma technology, and discloses a cascade arc plasma generator, which comprises a cathode structure, a cascade structure and an anode structure connected in sequence. When the cascade arc plasma generator is working, a working gas to be ionized enters an ionization chamber through an air inlet channel, a potential difference exists between a plurality of arc starting needles and an anode body, the plurality of arc starting needles all break down the working gas, the working gas is ionized, and plasma is formed, and is ejected to the outside of the cascade arc plasma generator through the ionization chamber, the plasma channel and the anode channel connected in sequence, enters an external device, and interacts with a material sample. The plurality of arc starting needles are parallel to each other and arranged at intervals, and the needle tips are all located in the same plane to form a planar plasma source, which can irradiate a large area of ​​material samples or irradiate a plurality of material samples at one time, and the arrangement of the plurality of arc starting needles can also be changed to be suitable for material samples of different shapes, so as to improve the irradiation efficiency.

The invention discloses a preparation method for regenerating plastic particles by using recycled plastics, and relates to the technical field of plastic recycling, the preparation method comprises the following specific steps: S100, sorting and cleaning: removing large-volume impurities in mixed plastics through manual sorting, separating non-target plastic materials through mechanical sorting equipment, and carrying out secondary cleaning on the non-target plastic materials; putting the sorted plastic into a cleaning tank containing a detergent and clear water, stirring or spraying and cleaning, and then centrifugally dewatering to dry the surface of the plastic; according to the method, low-temperature plasma treatment and scientific separation parameter determination are combined, the preparation efficiency and purity of the regenerated plastic particles are remarkably improved, in the pretreatment stage, the low-temperature plasma technology is adopted to be matched with inert gas protection, pollutants on the surface of the plastic are effectively removed, and the interface of the plastic is activated; meanwhile, the problem of material degradation caused by traditional high-temperature treatment is avoided, energy consumption is reduced, and a more stable material basis is provided for subsequent separation.

The invention provides a method and device for reducing coating defects of a disc-type ceramic membrane, and the method comprises the following steps: positively mounting a clamp on a spraying station, enabling the ceramic membrane to dynamically rotate, and cleaning and activating the front surface of the ceramic membrane by adopting a low-temperature plasma technology; carrying out negative pressure suction on the ceramic membrane while the ceramic membrane is dynamically rotated, and spraying a membrane preparation liquid on the front surface of the ceramic membrane by adopting ultrasonic atomization; and dynamically rotating the ceramic membrane, and performing negative pressure suction on the ceramic membrane, so that the circular arc part of the ceramic membrane is dynamically dip-coated in the membrane preparation liquid. According to the method, dynamic rotation of the ceramic membrane, negative pressure and ultrasonic spraying are cooperated, ultrasonic atomized liquid drops are sucked into a micropore structure or surface gaps when making contact with the surface of the ceramic membrane, pinholes or defects of the membrane layer are avoided, and the uniform, dense and defect-free membrane layer is formed; and non-contact with the ceramic membrane can be realized, and the coating defect caused by improper contact before the membrane layer is dried is effectively prevented.

The invention discloses a hard-carbon-doped negative electrode material and a preparation method and application thereof, and the preparation method of the hard-carbon-doped negative electrode material comprises the following steps: S1, carrying out heat treatment on a nitrogen-containing precursor to obtain graphite-phase carbon nitride; grinding into powder, mixing with acid liquor, ultrasonically stirring, and washing to be neutral; drying and adding water to obtain a suspension; s2, mixing and reacting a phenolic compound and an aldehyde compound with an alkaline aqueous solution, then uniformly mixing with the suspension, and carrying out spray drying to obtain dry powder; s3, NaF is placed in a high-frequency plasma reaction bin to form steam, and NaF is deposited on the surface of the dry powder; and S4, in the atmosphere of protective gas, carrying out heat treatment on the dry powder deposited with the NaF, and then carrying out carbon coating. According to the hard carbon-doped negative electrode material provided by the invention, NaF forms steam through a plasma technology to uniformly coat the surface and pores of hard carbon, and then carbon coating is performed through vapor deposition, so that the binding force of NaF is increased, and the specific surface area of the hard carbon material is reduced, and therefore, the hard carbon-doped negative electrode material has high first efficiency and long cycle performance.

The invention discloses a silicon-carbon composite negative electrode material and a preparation method and application thereof, the silicon-carbon composite negative electrode material comprises porous carbon and silicon particles attached to the porous carbon, and an attachment method between the porous carbon and the silicon particles comprises chemical bond attachment. The lithium battery prepared from the silicon-carbon composite negative electrode material disclosed by the invention has excellent first effect, specific capacity and cycle capacity retention rate. And the preparation method of the silicon-carbon composite negative electrode material has the characteristics of one-step double effects, greenness and high efficiency. Besides, the plasma technology is utilized to excite the medium gas, the two key steps of pore forming and functionalization are completed in one step through the synergistic effect of different medium gases, compared with a traditional chemical activation method, use of strong acid and strong base and the tedious cleaning process are avoided, no waste water is discharged, and the method is more environmentally friendly and saves more energy.

The invention belongs to the technical field of sodium ion battery positive electrode materials, and relates to a gas-liquid mixture source plasma constructed high-capacity interface dual-modified sodium ferric pyrophosphate composite positive electrode material and a preparation method and application thereof. The preparation method comprises the following steps: taking sodium ferric phosphate pyrophosphate as a matrix, taking sulfur hexafluoride as a gas source, introducing a liquid source, and carrying out fluorine and sulfur element synergistic doping modification and surface carbon layer coating on sodium ferric phosphate pyrophosphate by utilizing a plasma technology to obtain the sodium ferric phosphate pyrophosphate composite positive electrode material. The composite positive electrode material shows excellent sodium storage cycle stability and rate capability, and has a wide market application prospect. Meanwhile, the preparation method provided by the invention is simple, rapid, efficient and convenient, is easy to control, and contributes to promoting the development and application of the high-performance sodium-ion battery positive electrode material.