11 results about "Concentration cell" patented technology

To provide a particle size measurement method, a calibration curve creation method, and a particle size measurement device, which are simple in operation and do not require a power supply.SOLUTION: A method for measuring a particle diameter of a measurement target particle, comprising: a voltage change measuring step of adding a plurality of times the measurement target particle to a lower concentration electrolytic solution of a concentration cell including two electrolytic solutions having different concentrations and two electrodes respectively immersed in the electrolytic solutions and connected to each other; a reference particle concentration determining step of determining a reference particle concentration at a predetermined reference voltage change value based on a voltage change obtained in the voltage change measuring step; and a particle diameter determining step of determining a particle diameter of the measurement target particle based on the reference particle concentration and a calibration curve indicating a relationship between particle diameters and reference particle concentrations prepared in advance for the concentration cell.SELECTED DRAWING: Figure 1

The application discloses a kind of based on the coupling of electrochemical parameter gap corrosion evaluation method and device, it is related to electrochemical corrosion evaluation technical field.Gap corrosion evaluation method includes the following steps: based on gap structure establishes oxygen concentration cell, determines anode, cathode and its surface area;In the oxygen-poor medium environment, the anodic polarization curve of target material is measured, the cathodic polarization curve of target material is measured in the oxygen-rich medium environment, obtains anode current density-potential relationship and cathode current density-potential relationship;According to the electrochemical balance formula that total cathode current is equal to total anode current, the coupling potential of oxygen concentration cell is calculated, and further the gap corrosion current density corresponding to coupling potential is obtained, and the gap corrosion rate is calculated according to gap corrosion current density.The gap corrosion evaluation method provided by the application is suitable for the rapid prediction of initial stage of gap corrosion, with the characteristics of convenient, high repeatability, the result is more accurate.

The application belongs to the field of heat dissipation of photovoltaic cells, and particularly relates to a multi-stage heat pipe heat exchange system and heat exchange method of high-multiple light concentration cell group. When the whole system starts to work, the Fresnel mirror located at the upper part focuses the sunlight to the cell group, the cell group converts the light energy into electric energy and stores the electric energy in the storage battery, and the storage battery ensures the operation of the electric heater. The preheated water is first exchanged through the surface of the cell group, the back of the cell group is provided with a heat collecting cavity to collect the high-temperature heat generated by the Fresnel light concentrator to the cell, and the controller controls the multi-stage heat pipe group to exchange heat with the heat collecting cavity through the feedback of the temperature sensor for different heat flow densities; the condensing end of the heat pipe is provided with a heat exchange box, the water after heat exchange is stored in a water storage tank, and the water storage tank is connected with a user end. The device effectively utilizes the sunlight heat energy in multiple aspects, reduces the cost, and has the characteristics of convenient use, high practicality, low energy consumption and the like.

The invention belongs to the technical field of functional poly-ampholyte materials, and particularly relates to a flexible concentration cell based on gradient poly-ampholyte hydrogel and a preparation method of the flexible concentration cell. The preparation method comprises the following steps: preparing PA hydrogel; preparing hydrogel with high salt concentration; and assembling the PA hydrogel and the high-salt-concentration hydrogel into the flexible concentration difference battery. The PA hydrogel is a semi-permeable membrane with a gradient-composition anion-cation dual-selectivity function, the function of low-salt-concentration hydrogel is integrated, the PA hydrogel and high-salt-concentration hydrogel are assembled to form the flexible concentration cell, a multi-layer ion selective material of a traditional concentration cell is simplified into single-layer functional hydrogel, and the specific surface area of the single-layer functional hydrogel is increased. The problem of interface impedance caused by multi-step assembly is avoided, and the requirements for miniaturization and light weight of wearable equipment can be met.

According to the full-carbon-chain polyaryl polymer, the ion exchange membrane and the application, a sulfonated polymer is prepared through a coupling polymerization method for the first time, has high molecular weight, can keep good mechanical performance under the high ionization degree, has extremely low swelling in electrolyte and is not prone to aging; a rigid framework of a main chain is combined with sulfonate ions, and an obvious microphase separation structure can be formed in the membrane. In addition, when the prepared ion exchange membrane is used in a battery, conductivity and impedance tests show that the ion exchange membrane has good ion transmission capability. In the battery circulation result, the flow battery prepared from the ion exchange membrane has no obvious capacity fading after 500 cycles, and the coulombic efficiency reaches 100%, which indicates that the ion exchange membrane is suitable for the aqueous flow battery, and shows high conductivity, excellent selectivity and high energy efficiency capacity utilization rate in the battery performance; the method has strong application potential in the fields of flow cells, fuel cells, electrolyzed water, concentration cells and the like.

The application provides a light-driven composite nanomotor based on oxygen-containing hole oxidized cuprous oxide and preparation and application of the light-driven composite nanomotor. 2+1 The rGO / CuO composite nanomotor is prepared by taking CuO material as a matrix and rGO as an outer wall material and by using an electrochemical deposition method as a preparation means. 2+1 The rGO / CuO composite nanomotor can realize high-efficiency movement in a low-concentration biocompatible fuel under visible light irradiation and can realize highly controllable targeted movement in a high-concentration cell isotonic environment under ultraviolet light irradiation. 2+1 The rGO / CuO composite nanomotor can load anticancer drugs in a short time. 2+1 The rGO / CuO composite nanomotor can effectively load drugs, can be applied to targeted drug delivery by using effective light driving, can be applied to environmental remediation, has a large application range, and meanwhile, the preparation method of the composite nanomotor is green, simple and easy to implement, and can realize batch preparation.

This invention provides an electrochemical cascade recovery device and method for lithium and acid regeneration from waste lithium iron phosphate (LFP) based lithium-ion batteries. The device includes: a base; a turntable rotatably connected to the top of the base, with a first gear fixedly connected to the outer surface of the turntable; an electrolytic cell and a concentration cell mounted on the top of the turntable; a filter assembly mounted at the bottom of the electrolytic cell for solid-liquid separation of materials after reaction within the electrolytic cell; and a mounting frame mounted on one side of the base, with a driving component mounted on the frame. The device and method for electrochemical cascade recovery of lithium and acid from waste LFP based lithium-ion batteries provided by this invention integrate multiple functions and can achieve multiple state changes through the cooperation of an automatic push rod and a driving component, improving ease of use and facilitating continuous production.

The invention discloses an oxyhydrogen renewable fuel cell system, and relates to the technical field of fuel cells and water electrolysis. The system comprises a renewable fuel cell stack, a hydrogen module, an oxygen module, a cooling module, a hydrogen and oxygen concentration detection module and a safety control module. The system adopts a closed double-cabin structure, a hydrogen side cabin and an oxygen side cabin are physically separated through a separation plate, and nitrogen is filled to maintain micro-positive pressure 10 kPa higher than environment pressure. The hydrogen and oxygen concentration detection module monitors the gas concentration in the cabin in real time by measuring the voltage difference between the two catalytic layers based on the concentration difference battery principle. The safety control module controls operation of the cooling fan, the exhaust valve and the water pump according to signals of the concentration sensor and the temperature sensor, and safety protection measures are automatically started when the concentration or the temperature exceeds the limit. The safety problem of hydrogen and oxygen leakage is effectively solved, and the safety and reliability of the system under the dynamic working conditions of vibration, movement and the like are remarkably improved.

The present invention relates to a two-step method for preparing 3-HP, the two-step method comprising a first step of culturing cells at a high concentration and a second step of producing 3-HP using the cells cultured at the high concentration as a catalyst, the two-step method being characterized in that: the cell production rate is controlled by the high-concentration cell culture in the first step; according to the present invention, a method for preparing 3-HP and / or a method for improving a 3-HP production rate by adjusting DO and / or culture temperature and pH in a second step, and a high concentration of 3HP can be produced from a high concentration of glycerin while stably maintaining cell activity.

Provided are a novel high-concentration cell preservation liquid and a high-concentration cell preservation method.　The cell preservation liquid is for preserving cells in a non-frozen state. The cell preservation liquid contains a basal medium and an additive added to the basal medium. The basal medium is a culture medium used for cell culture. The additive contains at least genetically modified albumin and ascorbic acid (ascorbic acid derivative). The cell preservation liquid stores the cells at a cell concentration of at least 1 × 107 cells / mL. For example, when cells are preserved in a cell preservation liquid at 4°C at a cell concentration of 1 × 108 cells / mL, the cell survival rate when 72 hours has elapsed is 80% or more.

This invention discloses an electrochemical oxygen pump energy storage system, comprising: an electrical energy input unit, an electrochemical oxygen pump device, a heat storage unit, an oxygen storage chamber, a regenerative unit, a battery stack device, an electrical energy output unit, a first electrolyte assembly, a second electrolyte assembly, a heating unit, a cooling unit, an oxygen outlet pipeline, and an oxygen inlet pipeline. This electrochemical oxygen pump energy storage system continuously produces and stores pure oxygen from the air using the electrochemical oxygen pump device. When needed, the produced oxygen is used to generate electricity through the battery stack device via the oxygen concentration cell principle. It has advantages such as rapid start-up, clean and pollution-free operation, high controllability, simple maintenance, continuous use, and easy deployment and expansion, enabling convenient and rapid response to various energy storage needs.