32results about How to "Solve the problem of concentration polarization" patented technology

The invention discloses a thick electrode with good electrochemical performance, which includes a current collector and an electrode membrane distributed on the current collector containing active materials and conductive materials. The electrode membrane includes an inner layer membrane close to the current collector and a The outer diaphragm of the current collector, the thickness of the electrode diaphragm is greater than 300 μm, the conductivity of the electrode diaphragm decreases from the inner diaphragm to the outer diaphragm, and the pores of the electrode diaphragm from the inner diaphragm to the outer diaphragm rate increase. The electrical conductivity of the inner membrane is relatively high, so that the electrons at the current collector can quickly enter or exit the inner membrane. The outer diaphragm has a large porosity, which can absorb more electrolyte, which solves the problem of poor electrolyte wettability caused by thick electrodes. In addition, the invention also discloses a method for preparing a thick electrode with good electrochemical performance.

The invention discloses a device for preparing a Ni-SiC composite coating on the inner surface of a hollow workpiece. A lower water outlet pipe and an upper water outlet pipe which are parallel and are arranged in an up-and-down manner are arranged in a liquid storage tank. After electroplating liquid flowing out of the upper water outlet pipe and electroplating liquid flowing out of the lower water outlet pipe are converged, the mixed electroplating liquid flows towards a sealed electroplating table under the drive force of an electroplating liquid circulation pump, and an electromagnetic flow meter is adjusted to control the volume flow rate of the electroplating liquid flowing towards the sealed electroplating table. After composite electroplating is completed in the sealed electroplating table, the electroplating liquid flows back into the liquid storage tank through a loop. One end of an air discharging pipe is connected with an outlet of a compressed air pump, and the other end of the air discharging pipe is connected in the liquid storage tank. The device is a the sealed and continuous-circulation electroplating device developed based on a traditional non-closed immersion type electroplating device and has the beneficial effects of being reasonable in structure, reliable in operation and convenient to use and operate, and the Ni-SiC composite coating with the good quality can be obtained on the inner surface of the hollow workpiece.

The invention discloses a novel solid-state electrolyte membrane material capable of being used as a lithium ion battery as well as a preparation method and application thereof. The material is a segmented copolymer containing a polyfluorosulfimide based lithium salt and a polyethylene oxide structure and the molecular structure is shown in the formula (I). The method comprises the following steps: mixing a fluorine-containing monomer and polyethylene oxide and dissolving into dry acetonitrile; adding an acid-binding agent and reacting at 0-100 DEG C for 1-10 days to obtain a polymer in a form of metal ion salt; dissolving the polymer in the metal ion salt form into an organic solvent; and adding LizX to carry out a lithium ion exchange reaction to obtain a polymer in a lithium salt form. The material can be used as a battery solid electrolyte material to be applied to preparation of the lithium ion battery. The material is used as solid electrolyte and has a better application prospect in terms of inhibiting the growth of lithium dendrites in the lithium ion battery, improving the transference number of lithium ions and ensuring high conductivity at room temperature and stable battery circulation.

The invention belongs to the technical field of lithium ion batteries and particularly relates to a single-ion polymer electrolyte, a preparation method thereof, a single-ion polymer electrolyte membrane and a lithium ion battery. The single-ion polymer electrolyte comprises polymer chains formed by structure units represented by formula 1 (shown in the description), wherein membrane supporting groups are linked between the two polymer chains, and two ends of the membrane supporting groups are respectively connected to sites 1 or 2 of the structure units; lithium ion providing groups are connected to the sites 1 or 2 of the structure units; the lithium ion providing groups and the membrane supporting groups are respectively connected to the site 1 or 2 of each independent structure unit; and the molar ratio of the lithium ion providing groups to the membrane supporting groups is 1 to (1-2). The single-ion polymer electrolyte has the advantages of high room temperature conductivity, mechanical strength and flame retardance and the like and further has very considerable application prospects in the field of the lithium ion batteries.

The invention discloses a turbulent electrolytic cell and a turbulent electrolytic production system consisting of the turbulent electrolytic cell. The turbulent electrolytic cell comprises a cell body, and a diaphragm frame for dividing the internal space of the cell body into an anode chamber and a cathode chamber; a liquid outlet communicated with the anode chamber is formed in the side wall of the cell body; an overflow port is formed in the upper part of the side wall of the cell body; and a liquid inlet pipe is arranged in the cell body. The turbulent electrolytic production system consisting of the turbulent electrolytic cell comprises an electrolysis system, a circular purifying system, a cooling system and an adjusting system communicated in sequence; the electrolysis system includes an electrolytic cell set and a circulating liquid gathering tank; overflow ports and drain ports of the electrolytic cell set communicate with the circulating liquid gathering tank; and the electrolysis system is connected with the circular purifying system through the circulating liquid gathering tank, and is connected with the adjusting system through liquid inlets pipes of the electrolytic cell set. The turbulent electrolytic cell solves the electrode concentration polarization and bubble effect phenomenon, and can prominently improve the electrolysis current efficiency; and the turbulent electrolytic production system consisting of the turbulent electrolytic cell can realize large scale, low energy consumption, automation and mechanization of the production of electrolytic manganese metal, and is higher in promotion prospect.

The invention discloses an eccentric rotating film filtering device which comprises a fixed shell, a rotating sleeve, a motor and a filter cartridge, wherein the rotating sleeve is rotationally arranged on the top of the fixed shell; the motor is used for driving the rotating sleeve to operate; the filter cartridge is positioned in a cavity of the fixed shell; the upper end of the filter cartridge is open, and the filter cartridge is of a hollow structure; multiple filtering holes are formed in the peripheral side wall of the filter cartridge; a film piece of which the outline is matched with the outline of the filter cartridge is fixedly arranged on the peripheral wall of the filter cartridge in a sleeving manner; a liquid inlet facing the opening of the filter cartridge is formed in the top of the fixed shell; a liquid outlet pipe is arranged at the bottom of the fixed shell; two sides of the bottom of the rotating sleeve downwards extend to form two connecting rods; the filter cartridge is hinged to the two connecting rods; and the mass center of the filter cartridge deviates from the center line of the rotating sleeve. According to the device disclosed by the invention, the phenomena of concentration polarization of the film surface and the film pollution can be well avoided, the permeation flux of the film is obviously improved, and the film separation performance is greatly improved.

The invention discloses an adjustable double-stage-rotation purifying device. The device comprises a fixed frame, an adjusting device, a casing, a rotating drum, a filtering drum and a first motor, wherein multiple first filtering holes are formed in the circumferential wall of the rotating drum, the outer circumferential wall of the rotating drum is sleeved with a first membrane piece, a liquid outlet is formed in the bottom of the casing, an end cover is detachably connected with the right end of the rotating drum, a first rotating shaft is fixedly connected onto the end cover and connected with an output shaft of the first motor, a mounting hole is formed in the left end side wall of the rotating drum, the filtering drum is communicated with the rotating drum through the mounting hole, the side wall of the filtering drum is connected with a liquid inlet pipe, a filtering plate is inserted in the filtering drum, multiple second filtering holes are formed in the filtering plate, and second membrane pieces are fixedly mounted on upper and lower surfaces of the filtering plate. The device can better solve the problems of concentration polarization of membrane surfaces and membrane pollution, the purifying effect of the device can be significantly improved, and the flow of the liquid flowing out of the liquid outlet can be adjusted according to actual operation conditions.

The invention discloses an improved double-stage rotary purification device. The device comprises a fixing frame, a pushing device, a casing, a rotary barrel, a filter drum and a first motor, wherein a plurality of first filter holes are formed in the circumferential wall of the rotary barrel, the circumferential wall of the rotary barrel is sleeved with a first membrane component, a liquid outlet is formed in the bottom of the casing, the right end of the rotary barrel is detachably connected with an end cover, a first rotating shaft is fixedly connected onto the end cover and connected with an output shaft of the first motor, a mounting hole is formed in the side wall of the left end of the rotary barrel, the filter drum is communicated with the rotary barrel through the mounting hole, a liquid inlet pipe is connected to the side wall of the filter drum, a filter plate is inserted into the filter drum, a plurality of second filter holes are formed in the filter plate, second membrane components are fixedly mounted on the upper surface and the lower surface of the filter plate, and a positioning groove allowing the head end of the filter plate to be inserted is formed in the inner side wall of the filter drum. The problems of concentration polarization of a membrane surface and membrane pollution can be better solved, and the purification effect of the device is remarkably improved.

The invention discloses a perfusion type electronickelling and silicon carbide device for an air cylinder. The perfusion type electronickelling and silicon carbide device for the air cylinder comprises an electroplating base, an electroplating solution groove, a cathode conducting rod and an anode conducting rod. The air cylinder to be electroplated is placed inversely on the electroplating base which is internally provided with a groove. One end of the anode conducting rod is arranged in the groove, while the other end of the anode conducting rod extends into a chamber of the air cylinder to be electroplated. The cathode conducting rod is arranged above the electroplating base and can move up and down. The electroplating base is provided with a liquid inlet which is communicated with the electroplating solution groove through a flow divider. The flow divider comprises an electroplating solution inlet, an electroplating solution outlet and at least a return opening. The electroplating solution outlet is communicated with a liquid outlet. The electroplating solution inlet and the return opening are communicated with the electroplating solution groove. The perfusion type electronickelling and silicon carbide device for the air cylinder further comprises a drive device which drives the electroplating solution to flow upward along the inner wall of the air cylinder and flow from the top of the air cylinder back to the electroplating solution groove. According to the device, the electroplating solution is less polluted, the life cycle of the electroplating solution is long, the electroplating solutions in grooves are not needed to be prepared, and the regenerating time and cost of the electroplating solution are reduced.

The invention discloses a two-stage rotating purification device. The two-stage rotating purification device comprises a fixing frame, a casing, a rotating drum, a filtering drum and a first motor, wherein multiple first filtering holes are formed in the circumferential wall of the rotating drum, a first membrane piece is mounted on the outer circumferential wall of the rotating drum in a sleeve manner, a liquid outlet is formed in the bottom of the casing, an end cover is detachably connected with the right end of the rotating drum, a first rotating shaft is fixedly connected onto the end cover and connected with an output shaft of the first motor, a mounting hole is formed in the left end side wall of the rotating drum, the filtering drum is communicated with the rotating drum via the mounting hole, the side wall of the filtering drum is connected with a liquid inlet pipe, a filtering plate is inserted and mounted in the filtering drum, multiple second filtering holes are formed in the filtering plate, second membrane pieces are fixedly mounted on the upper surface and the lower surface of the filtering plate, and a positioning groove where the head end of the filtering plate is inserted and mounted is formed in the inner side wall of the filtering drum. With the adoption of the two-stage rotating purification device, problems of concentration polarization of membrane surfaces and membrane pollution can be well solved, and the purification effect of the device is significantly improved.

The invention discloses an improved rotating membrane sewage filtration device, which comprises a rack, a filter box, a first rotating shaft, a motor and a filter cartridge. A plurality of filter holes are formed on the circumferential wall of the filter cartridge, the outer circumferential wall of the filter cartridge is fixedly sleeved with a membrane member, the left side wall of the filter cartridge is connected to a liquid inlet tank, the bottom side wall of the filter box is provided with a liquid outlet, the right end side wall of the filter cartridge is provided with a slag outlet, a second rotating shaft in transmission connection with the first rotating shaft is mounted on the filter box, the second rotating shaft is equipped with a gear able to rotate synchronously therewith, and engaging teeth engaged with the gear are formed on the right side of the filter cartridge. The right end of the slag outlet is connected to a convergent cylinder, a rubber sleeve is inserted in the convergent cylinder, the right end of the rubber sleeve is connected to a plurality of petals, and each petal is equipped with an adjustment unit. The improved rotating membrane sewage filtration device provided by the invention well solves the concentration polarization and membrane pollution problems of the membrane surface, significantly increases the membrane permeation flux, and greatly improves the membrane separation performance.