526 results about "Active electrode" patented technology

Methods and systems for testing and treating spinal cord stimulation (SCS) patients are disclosed. Patients are eventually treated with sub-perception (paresthesia free) therapy. However, supra-perception stimulation is used during “sweet spot searching” during which active electrodes are selected for the patient. This allows sweet spot searching to occur much more quickly and without the need to wash in the various electrode combinations that are tried. After selecting electrodes using supra-perception therapy, therapy is titrated to sub-perception levels using the selected electrodes. Such sub-perception therapy has been investigated using pulses at or below 10 kHz, and it has been determined that a statistically significant correlation exists between pulse width (PW) and frequency (F) in this frequency range at which SCS patients experience significant reduction in symptoms such as back pain. Beneficially, sub-perception stimulation at such low frequencies significantly lowers power consumption in the patient's neurostimulator.

Methods, systems and devices are provided which transmit energy to a body lumen or passageway in the form of pulsed electric fields (PEFs) and in a manner which provides focal therapy. In some embodiments, PEFs are delivered through independent electrically active electrodes of an energy delivery body, typically in a monopolar fashion. Such delivery concentrates the electrical energy over a smaller surface area, resulting in stronger effects than delivery through an electrode extending circumferentially around the lumen or passageway. It also forces the electrical energy to be delivered in a staged regional approach, mitigating the effect of preferential current pathways through the surrounding tissue. Focal delivery of PEFs can provide increased tissue lethality by employing precise timing and sequencing of energy delivery to the electrodes.

The invention relates to active electrode materials and to methods for the manufacture of active electrode materials. Such materials are of interest as active electrode materials in lithium-ion or sodium-ion batteries. The invention provides an active electrode material comprising a mixed niobium oxide, wherein the mixed niobium oxide has the composition M1aM2i-aM3bNbi2-bO33-c-dQd, wherein: M1 and M2 are different; M1 is selected from Mg, Ca, Sr, Y, La, Ce, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Fe, Co, Ni, Cu, Zn, Cd, B, Al, Ga, In, Si, Ge, Sn, Pb, P, Sb, Bi and mixtures thereof; M2 is Mo or W; M3 is selected from Mg, Ca, Sr, Y, La, Cc, Ti, Zr, Hf, V, Ta, Cr, Mo, W, Mn, Fe, Co, Ni, Cu, Zn, Cd, B, Al, Ga, In, Si, Ge, Sn, Pb, P, Sb, Bi, and mixtures thereof; Q is selected from F, Cl, Br, I, N, S, Se, and mixtures thereof; 0<a<0.5; 0<b<2; −0.5<c<1.65; 0<d<1.65; one or more of b and d is >0.

An electrosurgical device is disclosed for creating a channel through a region of tissue within a patient's body using radiofrequency (RF) energy. The electrosurgical device is configured to have an outer diameter that is smaller than conventional RF wires. The electrosurgical device further includes an elongated active electrode tip, which provides enhances visualization capabilities. The low-profile electrosurgical device is capable of traversing narrow blood vessels, such as those in the peripheral vasculature. An electrically insulative thermal shield is disposed between the active electrode tip and an insulated proximal region. A rigidity component and a reinforcement structure are disposed proximal to the thermal shield. The components being formed on a core wire having reduced diameter distal region.

Some embodiments include a system with a sensor with electrodes including an active electrode and a receiving electrode that is in physical contact with skin of a patient forming an electrical circuit with control electronics of a controller that can measure an electrical parameter using an active electrode and a receiving electrode within a closed loop electrical muscle stimulation system. A sense electrical pulse can be applied to the tissue using the sensor, an electrical parameter measured from the tissue, and a stimulation pulse applied to the tissue based at least in part on the measured electrical parameter. The stimulation is adjustably controlled by the controller to maintain a constant power output to the tissue based on the electrical parameter. A good is coupled to a computer readable medium configured to store usage data, the usage data relating to the patient's use of the good.

The present disclosure relates to a method and system for acquiring and analyzing physiological signals to detect neurodegenerative abnormality in a brain of a subject. A wearable wireless device together with one or more cluster of electrodes can be used to record the physiological signals for each hemisphere of the brain of the subject. For each hemisphere and for each of the one or more cluster of electrodes may include at least one active electrode. The physiological signals for each hemisphere may be separately processed that may include denoising, artifacts removal, segmentation, normalization, transformation, and / or feature extraction. The physiological signals of a first hemisphere and the physiological signals of a second hemisphere of the brain of the subject can be compared to quantify asymmetry across hemispheres and to identify neurodegenerative abnormality.

The embodiment of the invention relates to the technical field of electroencephalogram signal processing and brain-computer interfaces, and provides a rigid-flex active electrode device, equipment and a system. The device comprises a reference electrode, a bias driving electrode module, a first movable electrode module, a second movable electrode module, a third movable electrode module, a fourth movable electrode module, a fifth movable electrode module, a sixth movable electrode module, a seventh movable electrode module, an eighth movable electrode module and an interface module, the reference electrode comprises a buffer drive circuit and a wet electrode plate, and the signal-to-noise ratio of collected electroencephalogram signals can be increased.

Methods and systems for testing and treating spinal cord stimulation (SCS) patients are disclosed. Patients are eventually treated with sub-perception (paresthesia free) therapy. However, supra-perception stimulation is used during “sweet spot searching” during which active electrodes are selected for the patient. This allows sweet spot searching to occur much more quickly and without the need to wash in the various electrode combinations that are tried. After selecting electrodes using supra-perception therapy, therapy is titrated to sub-perception levels using the selected electrodes. Such sub-perception therapy has been investigated using pulses at or below 10 kHz, and it has been determined that a statistically significant correlation exists between pulse width (PW) and frequency (F) in this frequency range at which SCS patients experience significant reduction in symptoms such as back pain. Beneficially, sub-perception stimulation at such low frequencies significantly lowers power consumption in the patient's neurostimulator.

The invention discloses a C: GaN gate enhanced HEMT (High Electron Mobility Transistor) device and a preparation method thereof, the device comprises a substrate layer, a nucleating layer, a high-resistance buffer layer, a back barrier layer, a GaN channel layer, an insertion layer and a barrier layer which are sequentially arranged from bottom to top, and a C-doped C: GaN cap layer and a TiN metal layer are sequentially arranged in the middle of the upper surface of the barrier layer; two sides of the upper surface of the barrier layer respectively comprise a first ion implantation region and a second ion implantation region; a source electrode and a drain electrode are arranged on the inner sides of the first ion implantation region and the second ion implantation region respectively, and the lower surfaces of the source electrode and the drain electrode are both in contact with the GaN channel layer; passivation layers are arranged on the upper surfaces of the TiN metal layer and the barrier layer and on the two sides of the C: GaN cap layer, and a gate electrode is arranged on the upper surface of the C: GaN cap layer. By arranging the C: GaN cap layer and the back barrier layer, the grid electric leakage is effectively reduced, the positive withstand voltage of the grid is improved, and an enhanced device with stable threshold voltage is obtained.

The invention provides a head-mounted diagnosis and treatment device, a brain-computer interface system and a brain activity monitoring intervention method. The head-mounted diagnosis and treatment device comprises a head-mounted structure, at least one active electrode, at least one pair of stimulation electrodes and a control module, the head-mounted structure comprises a head beam supporting part and a frontal lobe wearing part, the two ends of the frontal lobe wearing part are connected with the two opposite sides of the head beam supporting part respectively, and the active electrode is arranged on the inner side of the frontal lobe wearing part. The active electrode is arranged on the head beam supporting part and used for collecting electroencephalogram signals of a frontal lobe area contact part, the stimulation electrode is arranged on the inner side of the head beam supporting part and used for forming electrical stimulation on the frontal lobe area contact part, and the control module is electrically connected with the active electrode and the stimulation electrode and used for determining the brain function state according to the electroencephalogram signals collected by the active electrode and controlling the stimulation electrode according to the determined brain function state. Thus, electrical stimulation therapy is formed. According to the head-mounted diagnosis and treatment device, the brain-computer interface system and the brain activity monitoring intervention method, diagnosis and treatment can be integrated, and the head-mounted diagnosis and treatment device is easy to wear and portable.

A surgical system for treating tissue includes a surgical device and a control system. A surgical device may include an end effector and a sensor. The end effector may include an active electrode for treating tissue. The sensor may be configured to generate a data signal corresponding to a characteristic of the end effector or tissue. A control system may be operably coupled to the sensor. The control system may be configured to deliver power to the active electrode, and may be configured to adjust the power during a time period during which the data signal is received by the control system.

A catheter for tissue ablation with one or more inner electrodes inside the lumen, one or more outer electrodes attached to the outer surface, and one or more passive conductive elements that are not connected to the power supply but that passively shape the electrical field. The electrodes may be offset from the catheter's distal end. The material between the inner and outer electrodes may be an insulator such as a dielectric with a high dielectric constant. This catheter configuration generates an electric field that bends around the tip of the catheter. The number, position, shape, and size of passive conductive elements may affect the shape of the electric field to improve ablation effectiveness and consistency. The active electrodes or passive conductors may be coupled to the inner surface of the catheter body, or they may be located inside the lumen so that fluid flows around them during ablation.

The invention relates to a charging type moisture power generation device based on a double-layer polymer film and a preparation method thereof, and belongs to the technical field of moisture power generation. Comprising an active electrode, double-layer polymer films and an inert porous electrode which are sequentially arranged, the first polymer film of the double-layer polymer films is a mixture of ferric hydroxide, polystyrolsulfon acid and polyvinyl alcohol, the second polymer film of the double-layer polymer films is poly (diallyldimethylammonium chloride), the first polymer film is in contact with the active electrode, and the second polymer film is in contact with the inert porous electrode. The second layer of polymer film is in contact with the inert porous electrode; the active electrode is made of metal with the standard electrode potential ranging from-1 V to + 0.5 V, and the inert porous electrode is made of metal with the standard electrode potential larger than + 1 V. Through moisture evaporation and an oxidation-reduction reaction, the battery can generate electricity by itself in a moisture environment, and can be self-repaired through the oxidation-reduction reaction when the performance is reduced, so that a charging effect is achieved.

A filtered feedthrough comprises an insulator sealed in a ferrule opening. A terminal pin sealed in an insulator via hole has a first end that extends outwardly beyond an insulator device side. A filter capacitor adjacent to the insulator device side has a dielectric supporting interleaved active and ground electrode plates. A passageway extending through the dielectric has an internal metallization. An external metallization is on a terminated portion as opposed to an unterminated portion of the dielectric outer surface. The capacitor ground electrode plates extend to the external metallization at the terminated portion, but they do not extend to the unterminated outer surface portion. The outwardly extending terminal pin end is connected to the internal metallization in the dielectric passageway which in turn is connected to the active electrode plates. A conductive material connects the capacitor external metallization at the terminated dielectric outer surface portion to a system ground.

Provided are active electrodes (AE) and methods for obtaining a neurological signal of a subject. The active electrode configured to be disposed of on the head of the subject and communicatively connected to one or more of another electrode and a backend. The active electrode includes a conductive element mounted to an AE board and disposed in contact with a skin of the subject, a second stage amplifier for amplifying the obtained signal, and a calibration module for calibrating coefficients. In some embodiments, the AE further includes a CMR boosting module for boosting CMR rejection. In some embodiments the AE includes an artifact removal module for removing motion artifacts.

The invention belongs to the technical field of sodium-ion batteries, and particularly relates to a negative-electrode-free sodium-ion solid-state battery and a preparation method thereof. The negative-electrode-free sodium-ion solid-state battery is composed of n sodium-ion solid-state battery units, n is larger than or equal to 2, and each sodium-ion solid-state battery unit sequentially comprises a current collector layer, a conductive agent layer, a solid electrolyte layer and a positive electrode active material layer; and the weight parts of the current collector layer, the conductive agent layer, the solid electrolyte layer and the positive electrode active material layer are respectively 0.5-10 parts, 0.01-0.10 part, 0.1-10 part and 10-1000 parts. Sodium-ion solid-state battery units are stacked with the positive electrode active material layers facing, current collector aluminum powder is placed on the positive electrode active material layer on the outermost surface, then compression molding is conducted, and the negative-electrode-free sodium-ion solid-state battery is obtained, and the current collector layer, the conductive agent layer, the solid electrolyte layer and the positive electrode active material layer serve as components. And the energy density of the sodium ion battery can be improved to the maximum extent.

A pass-through electrode device includes a tubular member including a proximal end, a distal end sized for introduction into a patient's body, a lumen extending between the proximal end and the distal end, and one or more pass-through electrodes on the distal end. Each pass-through electrode includes an outer portion on an outer wall of the tubular member, an inner portion exposed within an inner wall of the lumen, and is passive, e.g., electrically isolated and / or unconnected to other electrodes or components of the device. A system is also provided that includes an outer tubular member including one or more pass-through electrodes and a procedure device introducible through and deployable from the tubular member for performing a procedure, e.g., mapping and / or ablation. The procedure device includes one or more active electrodes that may be aligned with pass-through electrodes when the device is at least partially positioned within the outer member.

The invention discloses an electroreduction method of hexavalent chromium and application of the electroreduction method, and belongs to the technical field of electrochemistry. The electroreduction method of the hexavalent chromium comprises the following steps: taking an active electrode as a working electrode, and carrying out electroreduction on the hexavalent chromium under an alternating voltage condition, the preparation raw materials of the active electrode comprise a hexavalent chromium adsorption material; the alternating voltage condition is that the positive potential and the negative potential are periodically converted. The hexavalent chromium adsorption material can adsorb hexavalent chromium, the hexavalent chromium adsorption material is prepared into the working electrode, and the hexavalent chromium is electrically reduced under the alternating voltage condition, so that the method has the advantages of high treatment rate and high treatment capacity, the hexavalent chromium can be effectively reduced into trivalent chromium, the removal rate of the hexavalent chromium is high, and the method is suitable for industrial production. The method provided by the invention has a good application prospect in chromium-containing wastewater treatment.

The invention relates to active electrode materials and to methods for the manufacture of active electrode materials. Such materials are of interest as active electrode materials in lithium-ion or sodium-ion batteries. The invention provides an active electrode material expressed by the general formula [M1]x[M2](1−x)[Nb]y[O]z, wherein: M1 and M2 are different; M1 represents one or more of Ti, Mg, V, Cr, W, Zr, Mo, Cu, Fe, Ga, Ge, Ca, K, Ni, Co, Al, Sn, Mn, Ce, Te, Se, Si, Sb, Y, La, Hf, Ta, Re, Zn, In, or Cd; M2 represents one or more of Mg, V, Cr, W, Zr, Mo, Cu, Ga, Ge, Ca, K, Ni, Co, Al, Sn, Mn, Ce, Sb, Y, La, Hf, Ta, Zn, In, or Cd; and wherein x satisfies 0<x<0.5; y satisfies 0.5≤y≤49 z satisfies 4≤z≤124.

Aspects of the disclosure include an electrode calendering system having an electrode foil wrinkle remover band and a process for manufacturing electrodes using the same. An exemplary system includes a top roll press and a bottom roll press separated from the top roll press by a gap. The gap includes a distance selected to accommodate a current collector having a bare portion and a coated portion having thereon an active electrode material of a first thickness. The system further includes a wrinkle remover band having a second thickness selected, based on the first thickness, to evenly distribute stress across the bare portion and the coated portion of the current collector during a calendering process for forming a pressed electrode.

A system and method for delivering ocular microstimulation therapy includes one or more active electrodes near the anterior part of the eye, one or more return electrodes on the patient, and a controller configured to generate electrical signals (e.g., anodal monophasic or biphasic pulses) with defined amplitude, current density, polarity, frequency, and duty cycle. The total electrode contact area is between about 1.5 cm2 and about 4 cm2. In some methods, the stimulation can be divided into subphases or varied in ramped or randomized patterns to reduce habituation. A therapy regimen can span multiple sessions, with data structures specifying session dates and modes, and whether treatment is unilateral or bilateral. Safety features detect hazardous reductions in electrode contact area.

A radiofrequency (RF) generator for use in a tissue puncture system for puncturing a tissue in a body is disclosed. The RF generator includes an RF energy source to couple to an active electrode of an RF puncture device and to couple to a return electrode and a controller coupled to the RF energy source. The controller causes the RF energy source to generate each of a puncture signal and a test signal, the test signal having a lower power than the puncture signal, measures an impedance of the test signal, determine a state of the active electrode based on the impedance measurement, and displays the state on a display device.

A magnetic alignment device includes a first magnet part and a second magnet part, a thickness measuring part, and a control part. The first and second magnet parts accommodate an electrode sheet therebetween and the thickness measuring part measures a thickness of a negative electrode slurry disposed on the electrode sheet. The control part adjusts the separation distance of the first and second magnet parts. The magnetic alignment device measures the thickness of the negative electrode slurry applied on the negative electrode current collector in real time and controls the intensity of the magnetic field by adjusting the separation distance of the magnet part according to the measured negative electrode slurry thickness, and has an advantage of uniformly high alignment degree of the crystal faces of the carbon-based negative electrode active material contained in prepared negative electrode active layer.

The invention relates to a two-dimensional MXene-based active electrode material, a preparation method and an artificial synapse device, and the preparation method comprises the steps: preparing a two-dimensional MXene material from an MXene precursor through a wet etching method; mXene is subjected to in-situ vulcanization by utilizing rich functional groups with high electronegativity on the surface of MXene, micron-level elemental sulfur grows, and the obtained S-coated MXene can be used as an active electrode material of synapse. The active electrode material has many active sites, and is beneficial for synapse to show a high dynamic range under a pulse curve. MXene loaded with sulfur particles can be further mixed with a one-dimensional nano material, stirred and subjected to ultrasonic treatment, and a further modified active electrode material can be obtained. The interlamellar spacing of MXene is regulated and controlled through the intercalation effect of the one-dimensional nano material, and synaptic devices with different resistance change characteristics can be obtained. The method is simple in process, easy for large-scale production and high in expansibility, and has a wide application prospect in the field of neuromorphic devices.

The invention belongs to the technical field of inorganic non-metallic materials, electrochemistry, material chemistry and chemical power supply products, and particularly relates to a single-phase niobate and an active electrode material of a lithium ion battery as well as a preparation method and application of the single-phase niobate and the active electrode material. The single-phase niobate provided by the invention has a chemical formula of TixNbyOz (0.15 < = x / z < = 0.25 and 0.20 < = y / z < = 0.28) and has the characteristics of more titanium and less niobium. The single-phase niobate provided by the invention is prepared by adopting a liquid phase method based on a precursor solution, can be properly post-processed, has high safety performance, specific capacity, first-week coulombic efficiency, rate capability, cycle performance and temperature adaptability when being used for a negative electrode of a lithium ion battery, and is relatively low in cost. The preparation method of the active electrode material provided by the invention is simple, and the active electrode material has a wide application prospect in the field of ultra-fast charging and high-power lithium ion batteries. More choices are provided for the active negative electrode material of the lithium ion battery, and rapid development of the high-performance lithium ion battery can be greatly promoted.

The present invention relates to a porous electrode for use in electrical energy storage or production devices, such as a lithium ion battery. Said porous electrode is a porous layer comprising at least an active electrode material P and an electronic conductive oxide material.

The invention belongs to the field of material synthesis, and particularly relates to a method for preparing an electrode by processing nanoparticles on a polymer skeleton or a surface by using femtosecond laser, which is used for solving one of the problems that a catalyst used by a fuel cell membrane electrode is low in utilization rate and a preparation method is complicated. The method comprises the following steps: preparing a precursor solution; a substrate material is fixedly arranged at the bottom of a liquid container, and the precursor solution is added into the liquid container; irradiating the interface of the substrate material and the precursor solution with femtosecond laser to obtain a substrate material loaded with metal particles; wherein the precursor solution contains metal acid radical ions; the substrate material is a high polymer material; according to the femtosecond laser parameters, the wavelength is 800 nm or 1030 nm, the laser power ranges from 100 mW to 500 mW, the machining scanning speed ranges from 50 micrometers / s to 500 micrometers / s, and the machining time ranges from 5 min to 30 min; the substrate material loaded with the metal particles is an electrode material with catalytic activity. The preparation method is simple, and the uniformity and strength of the loaded metal particles are improved.

A filtered feedthrough comprises an insulator sealed in a ferrule opening. A terminal pin sealed in an insulator via hole has a first end that extends outwardly beyond an insulator device side. A filter capacitor adjacent to the insulator device side has a dielectric supporting interleaved active and ground electrode plates. A passageway extending through the dielectric has an internal metallization. An external metallization is on a terminated portion as opposed to an unterminated portion of the dielectric outer surface. The capacitor ground electrode plates extend to the external metallization at the terminated portion, but they do not extend to the unterminated outer surface portion. The outwardly extending terminal pin end is connected to the internal metallization in the dielectric passageway which in turn is connected to the active electrode plates. A conductive material connects the capacitor external metallization at the terminated dielectric outer surface portion to a system ground.

The invention relates to the technical field of electrodes for vanadium batteries, in particular to a preparation method of a catalytically active electrode for a vanadium battery, the catalytically active electrode and application of the catalytically active electrode. The preparation method comprises the following steps: loading a bismuth oxide water-phase dispersion liquid as a precursor on the surface of a graphite felt electrode substrate, placing the graphite felt electrode in an inert atmosphere to carry out a carbon thermal reduction reaction, and carrying out a solid-phase reaction on bismuth oxide and the graphite felt carbon substrate in the inert atmosphere to generate a strongly combined catalytic active site in situ. By pertinently controlling the concentration of the bismuth oxide water-phase dispersion liquid and the temperature of the carbon thermal reduction reaction, active components in the prepared catalytic active electrode for the vanadium battery are uniformly and firmly combined on the surface of a matrix, and high uniformity and high stability are shown. And meanwhile, a loading-first and one-step carbon thermal reduction method is adopted, so that large-scale production can be realized, the electrochemical activity of the product is effectively improved, the uniformity and consistency of the performance can be realized, and the multi-dimensional strict requirements of commercial production on the electrode performance and the manufacturing efficiency are effectively met.

The utility model discloses an integrated electrode and a flow battery, the integrated electrode comprises a flow guide substrate and a reaction active electrode material wrapping the outer surface of the flow guide substrate, the reaction active electrode material is a flexible structure, the flow guide substrate comprises concave areas and convex areas which are alternately arranged, and the concave areas and the convex areas are arranged on the outer surface of the flow guide substrate. The inner side of the concave area and the back side of the convex area form an electrolyte flow channel, the electrolyte flow channel is provided with an electrolyte inlet and an electrolyte outlet which are exposed to the outer side of the reactive active electrode material, and the flow channel wall of the electrolyte flow channel is provided with a flow guide hole for guiding the electrolyte towards the reactive active electrode material; and the reaction active electrode material and the diversion substrate are relatively fixed to form an integrated structure of electrolyte circulation and electrochemical reaction. According to the scheme, efficient flowing of the electrolyte is guaranteed, a stable reaction interface is provided, concentration polarization is reduced, the battery efficiency is improved, meanwhile, the flow guide substrate is convenient to grab by a mechanical clamping jaw, and full-automatic stack assembly is supported.