63results about How to "Improve electrochemical reaction efficiency" patented technology

The invention relates to a communication fuel cell spare power supply system, which comprises a hydrogen generation and storage unit, a fuel cell unit, a DC/DC unit, an output unit, an electric control unit, a routing inspection unit, a monitoring unit and a communication unit, and is characterized in that: the hydrogen generation and storage unit generates hydrogen by using solar or wind energy and releases the hydrogen by absorbing the heat of the fuel cell unit; the fuel cell unit generates direct current electric energy and heat by the electrochemical reaction of the hydrogen and oxygen; the DC/DC unit adjusts and boosts the direct current electric energy and then supplies the direct current electric energy to the output unit; the output unit supplies power to a load when commercial power fails; the electric control unit acquires various data and sends control information to all units; the routing inspection unit acquires all individual cell voltage values for transmission; the monitoring unit displays various parameters and working states and realizes human-computer interaction; and the communication unit performs short-range and long-range communication and monitoring. The power supply system is clean, high efficient, reliable and applicable to various communication spare power supplies.

The invention relates to an electrochemical machining method and an electrochemical machining device for a pulsating flow field tube electrode, and belongs to the technical field of electrochemical machining. The method comprises the following steps of: 1, adjusting the flow and the pressure by controlling an action of a spool of a servo valve (9) by a pressure servo execution module (4), and outputting a pulsating electrolyte solution to an electrochemical machining area; 2, modulating a control instruction phase by using a control system of an electrochemical machining machine tool according to a pressure and voltage feedback signal, so that the pressure of the machining area is matched with the voltage pulse rhythm; and 3, dynamically adjusting a feeding speed and the machining voltage by using the control system of the electrochemical machining machine tool so as to machine a hole with a variable section in regular change. The method and the device provided by the invention have important meaning for increasing the flocculent product discharge rate and the machining stability of the electrochemical machining of a neutral saline solution deep hole tube electrode.

The invention relates to a fuel cell, in particular a structure of the fuel cell having a proton exchange membrane applicable to high temperature operation, which comprises a fuel flow field, a CCM, an oxidizer flow field, and thin metal separating boards arranged on two sides of the oxidizer flow field. Inner sides of the thin metal separating boards are provided with poriferous layers of conductive material which are taken as flow fields and diffusing layers. The structure of the invention can simplify the structure of the fuel cell and greatly reduce the size.

The invention discloses an electrochemical-biological fluidized bed reactor and a wastewater treatment method. The reactor comprises an anaerobic fluidized bed and an aerobic fluidized bed. The lower portions of the anaerobic fluidized bed and the aerobic fluidized bed are connected through a first electrode group. The upper portions of the anaerobic fluidized bed and the aerobic fluidized bed are connected through a second electrode group. A first water inlet and a first water outlet are arranged in the anaerobic fluidized bed, a second water inlet and a second water outlet are arranged in the aerobic fluidized bed, and the first water outlet and the second water outlet are connected through a wastewater pipeline. An aeration head is arranged at the bottom of the aerobic fluidized bed. The wastewater treatment method includes maintaining the temperature in the anaerobic fluidized bed and the aerobic fluidized bed to be in the range of 18-38 DEG C, adding electrolyte into organic wastewater, and sequentially delivering the wastewater into the anaerobic fluidized bed and the aerobic fluidized bed for treatment. By means of the reactor and the wastewater treatment method, biological degradation is introduced in a conventional electrochemical system to achieve the oxidation-reduction where electrochemistry and biological degradation are coupled. The treatment speed is greatly increased, and the treatment effect of nitrogen-rich organic wastewater is improved.

The invention discloses a methanol reforming fuel cell heat utilization method based on major cycle and minor cycle. A cycle system corresponding to the methanol reforming fuel cell heat utilization method is composed of a cycle power device, a heating device, an electric pile runner, an electronic thermostat device, a radiating device and a cycle medium. And the method is relates to the technicalfield of the fuel cell. The methanol reforming fuel cell heat utilization method based on major cycle and minor cycle can add the electronic thermostat device in the cycle system, so that the entirecycle system is divided into two cycle systems, the path and time of each cycle period can be shortened, the heating speed is improved, the path and the time of the period cycle are reduced, and the unnecessary heat loss is avoided at the same time; the preheating efficiency is improved when the power consumption is reduced, the electric pile is faster in temperature rise rate and shorter in generation waiting time, and the waiting time of a user is reduced.

The invention discloses a ruthenium sulfide composite material, which comprises a conductive substrate material and ruthenium sulfide particles growing on the conductive substrate material. The invention also discloses a preparation method and an application of the ruthenium sulfide composite material as a cathode material in water electrolysis to prepare hydrogen.

The invention relates to a metal bipolar plate with a graphene conducting layer and a manufacturing method thereof. The metal bipolar plate is arranged in a fuel cell. The metal bipolar plate comprises two metal flow field plates. The two metal flow field plates are respectively an anode side metal flow field plate and a cathode side metal flow field plate. Each of the metal flow field plates is respectively a first surface and a second surface. The first surface and the second surface are respectively provided with a plurality of diversion grooves. Graphene layers are disposed on the first surface and the second surface. The anode side metal flow field plate and the cathode side metal flow field plate are combined by welding or riveting. The invention discloses a light and thin metal bipolar plate with a graphene layer and a manufacturing method thereof, and the metal bipolar plate has good ductility, corrosion resistance, electrical conductivity and high thermal conductivity.

An improved fluid recycling apparatus and a fuel cell system comprising the same effectively recycle moisture contained in fluid circulating in a fuel cell system and operate independent of orientation. The fluid recycling apparatus includes an electric penetration pump and a gas/liquid separation unit. The electric penetration pump has first and second electrodes and an electric penetration layer interposed between the first and second electrodes. The electric penetration pump directs a liquefied fluid through an electric fluid passage formed in the electric penetration layer by applying a voltage between the first electrode and the second electrode. The gas/liquid separation unit is disposed upstream of the electric fluid passage, contacting the electric penetration pump, and comprises a porous material that can absorb the liquefied fluid. The gas/liquid separation unit comprises at least one fluid inflow hole through which a mixture of a gaseous fluid and a liquefied fluid is introduced, and at least one gas discharge hole communicating with the fluid inflow hole configured for discharging the gaseous fluid.

The invention belongs to the technical field of water electrolysis, and particularly relates to a porous array electrode with a two-stage structure as well as a preparation method and application of the porous array electrode. The porous array electrode includes: a porous conductive substrate; a primary array structure grown on the porous conductive substrate; and a sheet-shaped, conical or spine-shaped secondary nano-structure growing on the surface of each unit of the primary array structure in a radial manner. The invention further discloses the preparation method and application of the electrode. The porous electrode structure is obtained for the first time; the surface of the conductive substrate is provided with an arrayed two-stage structure, so that firm combination with the conductive substrate can be achieved, damage and falling are not liable to occur, more active sites for electrochemical reactions are exposed, the electrochemical reaction efficiency is improved. More nanoscale hydrogen bubbles can be obtained when the porous array electrode is used as a cathode material for the water electrolysis hydrogen evolution reaction.

The invention provides an air fuel cell including an outer box, an upper cover, a series cathode assembly, a number of metal anode plates, a battery anode connection terminal, and a battery cathode connection terminal; the outer box is internally provided with an electrolytic solution; the upper cover is provided with a number of ventilating grooves; the series cathode assembly includes a number of assembly bodies each provided with two cell cathode plates; the metal anode plates are placed between the battery cathode plates of each two adjacent assembly bodies; the battery anode connection terminal and the battery cathode connection terminal are connected with the metal anode plates in series respectively. The invention also relates to an air channel structural member, an air channel assembly and an air fuel cell box body structure. The unique air channel structure is adopted, a good air circulation environment is provided for a cathode of the cell, the efficiency of the electrochemical reaction is improved, and the output of the cell is increased. The air fuel cell has the advantages of ingenious design, reasonable structure, high practicability and convenient promotion.

A microbial fuel cell (1) includes an electrolysis solution (2) including organic matter, a negative electrode (3) holding anaerobic microorganisms and being in contact with the electrolysis solution, and a positive electrode (4) including a water-repellent layer (41) and a gas diffusion layer (42) placed on the water-repellent layer. A ratio of an area of the negative electrode to an area of the gas diffusion layer is defined as T₁, and a ratio of a maximum current density of the positive electrode at an electric potential of the positive electrode in an electrode system including the electrolysis solution, the negative electrode, and the positive electrode to a maximum current density of the negative electrode at an electric potential of the negative electrode in the electrode system is defined as T₂. The ratios T₁ and T₂ satisfy the relationship of the expression (1): T₂^1/2≦T₁≦T₂².

The invention relates to a porous silicon/carbon composite negative electrode material in-situ synthesized by taking porous polymer microspheres as a template, a preparation method and a lithium ion battery. The preparation process comprises the following steps of: adding porous polymer microspheres into water, heating and stirring to obtain a suspension solution; adding a silicon source into the suspension solution to obtain a mixed solution; filtering the mixed solution, washing the mixed solution with deionized water and drying the mixed solution in sequence, then adding a reducing agent, and conducting grinding and mixing to obtain an intermediate product A; treating the intermediate product A through a thermal reduction process to obtain an intermediate product B; and carrying out acid pickling on the intermediate product B, washing with deionized water, filtering, and drying to obtain a final product. Compared with the prior art, a carbon layer obtained through in-situ compounding can better improve the electrical conductivity, the cycling stability, the charge-discharge efficiency, the rate capability and other electrochemical properties of a silicon negative electrode, and the unique micro-nano pores reserve a lithium-intercalation expansion space for silicon and reduces the absolute volume change of the composite material in the charge-discharge process.

The invention provides a biosynthesis method of a high-performance olivine-type manganese-based phosphate positive electrode material, and an olivine-type phosphate material is synthesized by using a biomineralization mechanism of yeast cells and is used as an electrode material of a lithium ion battery. According to the biosynthesis method disclosed by the invention, the size, the structure, the morphology, the chemical composition, the crystal growth orientation and the like of nano inorganic salt particles can be more effectively regulated and controlled on the molecular level; wherein the mineralization growth process of phosphate crystals is regulated by utilizing a biological mineralization mechanism of yeast cells, and nano crystal LiMn0.8Fe0.2PO4 particles preferentially growing in the Li < + > transmission crystal orientation [010] direction are obtained; furthermore, by virtue of a high-temperature inert atmosphere heat treatment condition, yeast cells are thermally decomposed into a biomass carbon network in which amorphous carbon and nitrogen-doped graphene coexist, and a multi-stage nano in-situ composite structure is formed between the biomass carbon network and LiMn0.8Fe0.2PO4 nanocrystals, so that a three-dimensional conductive network of an efficient electronic path and an ion path is constructed, and the electrochemical performance of the manganese-based olivine type LiMn0.8Fe0.2PO4 positive electrode material is remarkably improved.

The invention relates to a sulfur/MXene/graphene composite material and a preparation method and application thereof. The composite material is prepared from elemental sulfur, MXene and graphene, andthe mass ratio of the elemental sulfur to the MXene to the graphene is (4-17):(1-6):1. The preparation method of the sulfur/MXene/graphene composite material comprises the following steps: mixing andgrinding the elemental sulfur, the MXene and the graphene, and then preparing the sulfur/MXene/graphene composite material through a vacuum melting diffusion method. The sulfur/MXene/graphene composite material is high in sulfur loading capacity, good in conductivity. When the material is used as a positive electrode material of a lithium-sulfur battery, the composite material can improve the conductivity of the positive electrode material and the utilization rate of active substance sulfur, and can adsorb intermediate-state polysulfide generated in the reaction process, thereby avoiding the shuttle effect caused by the dissolution of the intermediate-state polysulfide, and further improving the specific energy and coulombic efficiency of the lithium-sulfur battery.

The embodiment of the invention discloses a bipolar plate for a fuel cell, which comprises a cathode reaction flow field, a first fuel notch and a second fuel notch, wherein the cathode reaction flow field comprises a main reaction flow field located in the middle and two flow guide flow fields located at the two ends of the main reaction flow field, wherein each flow guide flow field comprises a plurality of flow guide flow channels, one flow guide flow field is communicated with the first fuel notch and the main reaction flow field, the other flow guide flow field is communicated with the second fuel notch and the main reaction flow field, and the multiple flow guide flow channels are in a radial shape diverging towards the main reaction flow field by taking the first fuel notch or the second fuel notch as a starting point. According to the invention, the fuel can be fully distributed on the whole cathode reaction flow field, and all the fuel entering the reaction flow field participates in electrochemical combustion reaction, so that the electrochemical reaction efficiency of the reaction field is effectively improved, some reaction dead zones or reaction dead angles possibly existing in the reaction field are effectively eliminated, and the reaction efficiency is improved.

The invention provides a wastewater membrane pretreatment device which comprises an electrochemical reaction tank and a salt separation electrodialyzer, two groups of electrodes are mounted in the electrochemical reaction tank; in the first group of electrodes, the anode is a noble metal coating electrode, and the cathode is one of a graphite electrode, a titanium electrode and a stainless steel electrode; in the second group of electrodes, the anode is an iron electrode or an aluminum electrode, and the cathode is a stainless steel electrode or a graphite electrode. A wastewater inlet and a produced water outlet are formed in the electrochemical reaction tank; the wastewater inlet is used for introducing industrial wastewater, the produced water outlet is communicated with an inlet of a thin liquid chamber of the salt-separating electrodialyzer, an outlet of the thin liquid chamber of the salt-separating electrodialyzer is communicated with the wastewater inlet, and liquid discharged from an outlet of a thick liquid chamber of the salt-separating electrodialyzer is impurity-removed water subjected to membrane pretreatment. The structure is simple, wastewater of different water qualities can be treated, and impurities in the wastewater can be efficiently removed with low consumption. The invention also provides a wastewater membrane pretreatment method.

The invention relates to a lithium ion battery and a preparation method of a nickel oxide-nickel-nickel oxide nanotube array. The lithium ion battery comprises a nickel nanotube array composite electrode, and the nickel nanotube array composite electrode is prepared from the nickel oxide-nickel-nickel oxide nanotube array. The lithium ion battery comprises the nickel nanotube array composite electrode with the nickel oxide-nickel-nickel oxide sandwich structure, so transmission of electrons and electrolyte ions of an electrode system in the lithium ion battery can be enhanced, and excellent rate capability and cycling stability are obtained while high specific capacity is ensured.