8 results about "Double-layer capacitance" patented technology

The invention discloses a flexible pressure sensor based on ionized hydrogel and a preparation method thereof. The sensor adopts a sandwich layered structure of a flexible composite electrode, an ionized water gel dielectric layer and a flexible composite electrode, ionized water gel is used as a dielectric layer, and an upper flexible electrode and a lower flexible electrode are prepared from a multi-walled carbon nanotube / polydimethylsiloxane (MWCNTs / PDMS) composite material; the surface, making contact with the dielectric layer, of the electrode is copied through an abrasive paper template method to form a micron-sized rough structure. Under the action of external pressure, the effective contact area between the microstructure electrode and the ionized water gel dielectric layer and the equivalent electrode distance change, so that the interface electric double-layer capacitance is regulated and controlled, and high-sensitivity conversion from a pressure signal to a capacitance signal is realized. The flexible pressure sensor is simple in structure and excellent in flexibility, can be further integrated into a pressure sensing array, and is suitable for the fields of wearable electronics, electronic skin, man-machine interaction and the like.

The invention relates to an IrO2-Ta2O5 titanium anode coating based on graphene doping and temperature programming sintering synergistic enhancement and a preparation method of the IrO2-Ta2O5 titanium anode coating, and belongs to the technical field of electrode material preparation. According to the method, graphene is doped in an IrO2-Ta2O5 coating, the content of the graphene is controlled to be 0.2-0.8 mg / mL, preferably 0.6 mg / mL, the content of iridium is 26 g / m, and a 200-500 DEG C temperature programming sintering process is adopted. By optimizing the graphene dispersing and sintering process, the conductivity, the electrocatalytic activity and the structural stability of the coating are remarkably improved. Experimental results show that the coating has lower charge transfer resistance and higher electric double layer capacitance and oxygen evolution reaction activity, and the strengthening life of the coating exceeds 1100 hours and is far longer than that of a traditional titanium anode coating. The method is suitable for high-requirement electrochemical scenes such as electrolytic copper foil and chlor-alkali industry, and has a good industrial popularization prospect.

The present invention relates to a method for treating a surface (10a) of a part (10) of an implantable medical device (1), the method comprising the steps of: providing the part (10), the part (10) comprising a surface (10a) comprising titanium, exposing the surface to a gas (G) containing nitrogen, and applying laser light (L) to the surface (10a) to create a titanium nitride (TiN) layer (11) on the surface (10a) having an increased double layer capacitance compared to the untreated surface (10a).

The invention relates to a high-modulation-efficiency phase modulator based on a silicon nitride-lithium niobate waveguide. The modulator comprises an optical transmission unit and an electric transmission unit, the optical transmission unit comprises a quartz substrate layer, a silicon dioxide buffer layer arranged above the quartz substrate layer, a composite waveguide arranged above the middle position of the silicon dioxide buffer layer, and a silicon dioxide cladding covering the outer side of the composite waveguide; the electric transmission unit comprises a metal traveling wave electrode, and the metal traveling wave electrode adopts an embedded double-layer capacitor microstructure load traveling wave electrode. By optimizing the design of the electrode structure and the waveguide structure, the modulation efficiency is remarkably improved, broadband response and low optical loss are considered at the same time, and the device is suitable for application scenes sensitive to phase modulation efficiency and power consumption, such as high-speed optical fiber communication, coherent optical transmission systems, optical phased arrays and quantum optical experiments.

This invention relates to a method for operating an electric vehicle and an electric vehicle comprising: an electrical drive unit for the vehicle's driving motion; a control unit for controlling the vehicle's driving motion; a first energy storage device, particularly configured as a rechargeable battery device, for supplying a first DC voltage to the control unit; a second energy storage device, particularly configured as a double-layer capacitor device, and / or the second energy storage device charging and discharging faster than the first energy storage device, for supplying a second DC voltage to the drive unit; and a power supply unit, particularly intermittently providing a DC output voltage, wherein the first energy storage device is connected to the second energy storage device, particularly electrically, via a conversion device, wherein the connection between the first energy storage device and the power supply unit, particularly an electrical connection, is such that the DC output voltage is substantially equal to the first DC voltage, wherein the conversion device converts the first DC voltage to the second DC voltage, and wherein power flow from the second energy storage device to the first energy storage device is prevented.

The present disclosure relates to the technical field of electrode materials and provides a titanium-based platinum-nickel electrode material, a preparation method, and an application thereof. The method includes: performing a first anodic oxidation and a second anodic oxidation sequentially on a titanium sheet in an ammonium fluoride solution to obtain an oxidized titanium sheet; performing calcination on the oxidized titanium sheet to obtain a titanium sheet containing a titanium dioxide layer; and performing electrodeposition on the titanium sheet containing the titanium dioxide layer in a platinum-based electrolyte to obtain the titanium-based platinum-nickel electrode material. The prepared titanium-based platinum-nickel electrode material effectively reduces the usage amount of Pt-based precious metals and can maintain high activity and stability to generate hydrogen peroxide on-line under the neutral condition; its cathode current density efficiency reaches 76.40%, the anode current density efficiency reaches 70.23%, and the bilayer capacitance value is 1.33 mF·cm−2, which is 4.2 times the bilayer capacitance value of the titanium-based platinum-nickel electrode material obtained without anodic oxidation, and has a very good industrial application prospect.

The application relates to the preparation and application of a capacitive deionization electrode for treating low-concentration fluoride ion wastewater, and belongs to the technical field of capacitive deionization. A cerium-nitrogen co-modified turbo layered carbon material prepared by taking a supramolecule as a precursor, forming a carbon skeleton through pyrolysis and then performing metal modification control is used as an anode, carboxyl activated carbon is used as a cathode, and the cathode and the anode jointly form a capacitive deionization system. The cerium-nitrogen co-modified turbo layered carbon material electrode has a layered loose controllable mesoporous structure, a large number of active sites caused by unsaturated coordination vacancies and excellent electric double-layer capacitive behavior. The cerium-nitrogen co-modified turbo layered carbon material electrode has excellent fluoride ion adsorption capacity in low-concentration fluoride-containing wastewater, specifically, the adsorption rate is fast and the adsorption capacity is large, and the effluent concentration can reach below the relevant standard. The capacitive deionization electrode material has a good engineering application prospect in actual wastewater treatment.

The invention relates to the technical field of sensing of aquatic water ion detection, and discloses a solid-state contact layer of an all-solid-state ion selective electrode, FeCoNi-coated ZIF-8 doped with three transition metals of iron, cobalt and nickel is synthesized through a one-pot method, nano porous carbon based on ZIF-8 is generated through pyrolysis, and finally a transition metal doped ZIF-8-derived carbon nanomaterial is obtained. And mixing the carbon nanomaterial with a hydrophobic material and an ionic liquid to construct an ion-electron transduction layer of the all-solid-state ion selective electrode with excellent hydrophobic performance. The solid-state contact layer prepared by the invention not only can effectively inhibit the formation of a water layer between an ion sensitive film and a conductive substrate and solve the problem of potential drift of an ion selective electrode in measurement, but also has the advantages that the electric double-layer capacitance effect of the carbon nanomaterial and the synergistic pseudocapacitance effect among various transition metals act together; and the ion-electron transduction capability of the electrode is improved.