31results about How to "Increase the mass ratio" patented technology

The invention provides a composite flexible electrode as well as a preparation method and application thereof. The composite flexible electrode comprises a flexible current collector, flaky manganesedioxide compounded on the flexible current collector, and graphene. The composite flexible electrode as well as the preparation method and the application thereof provided by the invention have the benefits that the flaky manganese dioxide is mainly taken as an active substance, and the grapheme is taken as an electrical conductive agent, so that the electrical conductivity of the electrode can beimproved, the contact area of an electrolyte with the electrode is increased at the same time, and the diffusion distance of ions is reduced; therefore, the specific capacity and the rate performanceof a battery are improved. The invention further provides a flexible zinc ion battery and a preparation method thereof; the battery comprises the electrode and has good application and development prospects in aspects of portable foldable flexible electronics and energy devices. According to the embodiment of the invention, the flaky manganese dioxide and grapheme composite electrode is preparedby using a vacuum filtration method, a bonding agent is not required to be added, and the mass proportion of the active substance in the whole electrode is favorably improved, so that the energy density of the battery is improved. The preparation method provided by the invention is simple and is favorable for reduction in manufacturing cost.

The invention discloses a boron nitride/graphene double-heat-conduction-base aerogel composite phase change material. The material is formed by compounding modified boron nitride/graphene aerogel andn-octadecane by adopting a vacuum impregnation method. The double-heat-conduction aerogel is prepared by taking graphene oxide, modified boron nitride, polyvinylpyrrolidone and ethylenediamine as rawmaterials to prepare boron nitride/graphene hydrogel, freeze-drying the boron nitride/graphene hydrogel and then calcining the boron nitride/graphene hydrogel at a constant temperature. Polyvinylpyrrolidone is used as a cross-linking agent, and ethylenediamine is used as a reducing agent. A preparation method of the composite phase change material comprises the following steps: 1) preparing modified boron nitride; 2) preparing boron nitride/graphene double-heat-conduction-base aerogel; and 3) preparing the boron nitride/graphene double-heat-conduction-base aerogel composite phase change material. When the material is applied as a phase change material, the heat conductivity coefficient is 0.9-1.6 W/(m.K); wherein the phase change temperature is 19-32 DEG C, and the phase change latent heatis 200-220 J/g. The composite phase change material has the following advantages: 1, the heat conductivity coefficient is improved by 738%; 2, the leakage problem in the phase change process is effectively solved; and 3, the phase-change latent heat and the heat stability are high;

The invention discloses a method for preparing pyrolytic tar by pressurizing and pyrolyzing waste tires. The method comprises the following steps: putting crushed waste tires into a pyrolysis reactor,continuously introducing a protective gas at a preset flow rate, controlling the reaction pressure at 0.5-2.0 Mpa, heating to fully pyrolyze the waste tires, and collecting a pyrolysis product to obtain limonene-containing pyrolytic tar. The invention also provides a preparation method of limonene, which comprises the following steps: preparing the limonene-containing pyrolytic tar by using the above method, and separating and purifying to obtain limonene. According to the method disclosed by the invention, the pyrolytic reaction of the waste tires is controlled to be carried out in a properpressure interval, so that the mass ratio of limonene in the pyrolytic tar is effectively increased, and the concentration of limonene in the pyrolytic tar product is remarkably increased compared with normal-pressure and vacuum pyrolysis at the same temperature.

The invention provides self-dispersion water-based electric heating slurry and a preparation method thereof. The electric heating slurry is prepared from water-based dispersion-assisting resin, conductive nano carbon black, conductive graphite, graphene, a film-forming agent, an antifoaming agent, a leveling agent and deionized water. Anchoring groups and hydrophilic groups are introduced in the preparation process, so that the dispersion degree of the carbon material can be effectively increased, the water-based electric heating slurry which is uniformly dispersed and high in filling rate canbe obtained without additionally adding a dispersing agent, and due to the fact that a stable water-based system is formed, the slurry does not have the risks of layering, sedimentation, flocculationand the like in the subsequent storage process, the viscosity can be adjusted by adding water, the proportion and the effect of the dispersing agent do not need to be considered again, and the methodhas the advantages of being high in convenience and operability. The problems that a carbon material is prone to agglomeration and difficult to disperse in water-based slurry, high volume filling rate is difficult to obtain, and consequently conductivity is poor are generally solved, and the problem that preparation is complex due to the fact that a dispersing agent needs to be added is solved.

The invention relates to a three-dimensional porous self-supporting electrode and preparation and application thereof, the prepared electrode does not need a current collector, a binder and additionalconductive carbon, and the overall energy density of the electrode is greatly improved; the electrode has a heteroatom-doped three-dimensional conductive carbon network and a porous structure, and can ensure rapid transmission of electrons and sodium ions, thereby showing excellent rate capability; in the preparation process, the surface of an active substance is uniformly coated with the carbonized macromolecular resin, so that the volume change of the active substance in the circulation process can be inhibited, and the excellent circulation performance is achieved; and compared with a traditional self-supporting electrode preparation method (such as suction filtration film forming and electrostatic spinning), the process is simpler, lower in energy consumption and more suitable for large-scale production.

The present invention provides a gold-tin bonding method for a patterned surface. The method comprises the following steps of S1, stacking up a target substrate and a wafer between the upper and lower heating substrates of a bonding machine, wherein the to-be-bonded surface of the wafer is provided with at least one groove; the to-be-bonded surface of the target substrate is provided with a first bonding material layer used for enabling the gold-tin eutectic bonding operation; the to-be-bonded surface of the wafer is provided with a second bonding material layer used for enabling the gold-tin eutectic bonding operation; in the first and second bonding material layers, the mass ratio of the total tin is larger than 20%; S2, applying a pressure on the wafer and the target substrate by the upper heating substrate and the lower heating substrate, heating the wafer and the target substrate to a preset temperature, and bonding the wafer to the target substrate. According to the technical scheme of the invention, the seamless bonding between the wafer and the target substrate is realized, so that the influence on the subsequent processes is effectively reduced. The photoelectric characteristics of the wafer are improved.

The invention discloses an inertia wave energy power supply buoy. The inertia wave energy power supply buoy comprises a buoy shell and a power generation device and is characterized in that the powergeneration device is composed of an inertia pendulum located in the buoy shell, and the inertia pendulum swings in the buoy shell; the inertia pendulum comprises an energy capturing mechanism which converts back-and-forth swing of the inertia pendulum driven by waves into back-and-forth rotation to be output; a turning mechanism which is used for converting the back-and-forth rotation output by the primary energy capturing mechanism into single-direction rotation; and a power generator which is driven to generate electricity through the single-direction rotation output by the turning mechanism. Compared with the prior art, according to the inertia wave energy power supply buoy, a wave energy conversion mechanism is integrated in the inertia pendulum, the mass ratio of the inertia body relative to the buoy is increased, and therefore the energy capture efficiency is improved.

The invention relates to a method for preparing a nanoscale welding flux additive through a chemical reaction, and belongs to the technical field of welding additives. The method comprises the following steps that a CuCl2.2H2O/ethanol solution and a SnCl2.2H2O/ethanol solution are uniformly mixed to obtain an A-B mixed solution, a NaBH4/ethanol solution is dropwise added into the A-B mixed solution at 180-220 DEG C, and oscillation reaction is carried out until no bubbles are generated to obtain a seed crystal solution; and the seed crystal solution is subjected to heat preservation at 180-220DEG C and standing for 6-42 hours, solid-liquid separation is carried out, and the solid is washed to obtain the nano Cu3Sn particle additive. According to the method for preparing the nanoscale welding flux additive through the chemical reaction, the stability of welding spots after welding can be improved, the welding performance of current lead-free welding flux is better improved, reliabilityis improved, operation is convenient, and the process is simple.

The invention discloses a method for maintaining operation stability of an AGS reactor based on particle size control. The method comprises the following steps: taking a certain volume of a mud-watermixed solution in the reactor in the aeration state after the AGS reactor realizes aerobic granulation, successively screening from standard sieves with large to small pore sizes to obtain AGS with different particle-size ranges and fixing volumes to the same volume; crushing AGS with fixed volumes by using an ultrasonic cell crusher respectively, measuring the granulation rate of crushed sludge respectively, wherein the largest granulation rate is the particle-size interval with optimal stability; then screening the mud-water mixed solution in the reactor periodically, carrying out reflux oncollected AGS of the optimal particle-size range to the reactor, and storing AGS of other particle sizes for later use, thereby gradually increasing the mass ratio of AGS in the particle-size range with the optimal stability. The method for maintaining the operation stability of the AGS reactor based on the particle size control disclosed by the invention can maintain the stability of the AGS reactor in operation for a long time to realize high-efficient treatment of sewage.

The invention discloses a method for preparing graphene by electrochemically stripping graphite, which comprises the following steps: 1) taking a graphite material as an anode material, taking a mixed solution of micromolecular organic acid and inorganic acid or soluble sulfate as an electrolyte, and applying voltage to an anode in an electrolytic tank to realize electrochemical stripping of the graphite material; and 2) carrying out solid-liquid separation on a solid-liquid mixture obtained by electrolysis, washing to remove residual electrolyte so as to extract a graphene precursor dispersed in the electrolyte, drying the extracted graphene precursor, and carrying out fragmentation separation to obtain a graphene sample. According to the method, the graphite stripping effect can be improved, the raw material loss is reduced, the mass ratio of graphene is high, and the method is environment-friendly, energy-saving and low in cost.

The invention relates to an inertia wave energy device capable of supplying power to an ocean drifting floating body. The inertia wave energy device comprises a spring oscillator mechanism, a supporting mechanism, a transmission mechanism and a power generation mechanism. The supporting mechanism comprises supporting shafts and linear sliding bearings, and the supporting shafts penetrate through the linear sliding bearings to be fixedly installed between an upper cover plate and a lower cover plate. The spring oscillator mechanism comprises a spring, a rack and an oscillator, one end of the spring is mounted on the upper cover plate and the lower cover plate, the other end is connected with the upper and lower surfaces of the oscillator, the center of the oscillator is symmetrically cut, and the rack is fixedly mounted on the side surface of the oscillator; and the transmission mechanism comprises a transmission shaft, one end of the transmission shaft is connected with a vertical bearing and then sequentially penetrates through a gear and the other vertical bearing, and the other end of the transmission shaft is connected with a coupler. The power generation mechanism comprises a planetary gear speed increasing device, one end of the planetary gear speed increasing device is connected with the coupler, and the other end is connected with an electromagnetic generator. According to the device, one part of a wave energy conversion structure is integrated on the oscillator, so that the mass ratio of the oscillator in the system is improved, and the efficiency of capturing wave energy can be improved.