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 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 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 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.