257results about How to "Lower equivalent series resistance" patented technology

An implantable medical device such as a defibrillator is described. The device includes an hermetically sealed housing containing a flat electrolytic capacitor and an energy source such as a battery. The battery is connected to the capacitor and provides charge thereto. The capacitor stores the charge at a relatively high voltage. The charge stored in the capacitor is discharged through a defibrillation lead to a site on or in the heart when fibrillation of the heart is detected by the implantable medical device. Methods of making and using the implantable medical device, the capacitor, and their various components are disclosed.

A solid electrolyte capacitor having a solid electrolyte layer that is formed of a polymeric product layer of a polymerizable monomer. The polymeric product layer is doped with an organic sulfonic acid selected from the group consisting of an aromatic polysulfonic acid, an organic sulfonic acid having a hydroxy group, an organic sulfonic acid having a carboxyl group, an alicyclic sulfonic acid, and a benzoquinone sulfonic acid.

A shielded component or network for an active medical device (AMD) implantable lead includes (1) an implantable lead having a length extending from a proximal end to a distal end, all external of an AMD housing, (2) a passive component or network disposed somewhere along the length of the implantable lead, the passive component or network including at least one inductive component having a first inductive value, and (3) an electromagnetic shield substantially surrounding the inductive component or the passive network. The first inductive value of the inductive component is adjusted to a account for a shift in its inductance to a second inductive value when shielded.

A method of producing electrodes for electrolytic capacitors by etching metal foil in a low pH etching electrolyte is disclosed. The low pH electrolyte is an aqueous solution, which comprises hydrochloric acid, glycerol, sodium perchlorate or perchloric acid, sodium persulfate and titanium (111) chloride. Anode foils etched according to the method of the invention maintain high capacitance gains, electrical porosity and strength. The electrical porosity of the etched foils is sufficiently high such that the overall Equivalent Series Resistance (ESR) is not increased in multilayer anodes configurations. Also described is a low pH electrolyte bath composition. Anode foils etched according to the present invention and electrolytic capacitors incorporating the etched anode foils are also disclosed.

The invention provides a graphene composite electrode which comprises a current collector and electrode active materials arranged on the surface of the current collector, wherein the electrode active materials comprise graphene and manganese dioxide. The graphene is in a stratified structure and is arranged on the surface of the current collector, and the manganese dioxide is arranged on the surface of the graphene in the stratified structure. Mass percentage content of the graphene in the electrode active materials is 80%-90%. In addition, the invention further relates to a preparation method and an application of the graphene composite electrode. Oxidized graphene and the manganese dioxide are deposited on the current collector step by step, adhesion agents are not needed, and therefore equivalent series resistance of the whole electrode is reduced effectively, capacity and pseudocapacitance of an electric double-layer of the graphene and the manganese dioxide are developed simultaneously, and stability and conductivity of the electrode are well improved by addition of the graphene. In addition, through the method of electro-deposition, the electrode materials are directly deposited on an electrode plate, a complex coating process is saved, the process is simple, and time is short.

Provided is a supercapacitor electrode that is coupled on one side or both sides of a collector, in which the supercapacitor electrode consists of a carbon material that forms an electric double layer, in which the carbon material consists of: a powder-shaped electrode active material; a powder-shaped conductive material; and a fibrous carbon material of a aspect ratio of 3-33. The supercapacitor electrode can be implemented into a high-capacitance or high-power supercapacitor together with low equivalent series resistance.

A solid electrolytic capacitor includes a capacitor element assembly, an anode lead and a cathode lead. The assembly includes a plurality of capacitor elements each consisting of a sintered valve metal chip, an anode wire projecting from the chip, a solid electrolytic layer formed on the chip, and a cathode layer formed on the electrolytic layer. The chip of each capacitor element is flat, having a thickness smaller than its length and width. The capacitor elements are stacked in a thickness direction of the chip so that the cathode layers of the respective capacitor elements are connected to each other. The anode wires are fixed to the anode lead. At least one of the cathode layers is directly connected to the cathode lead.

The invention discloses a graphene/nano silicon combined electrode plate. The combined electrode plate comprises a current collector, graphene deposited on the surface of the current collector, and nano silicon dispersed on the surface of the graphene. According to the graphene/nano silicon combined electrode plate, the graphene and the nano silicon are directly deposited on the current collector. Compared with a traditional electrode plate added with an adhesive, the graphene/nano silicon combined electrode plate is lower in equivalent series resistance; and the power density of a battery can be effectively increased by use of the graphene/nano silicon combined electrode plate. The invention also provides a preparation method of the graphene/nano silicon combined electrode plate.

The invention includes supercapacitors and methods of making supercapacitor by fabricating transition metal dichalcogenide (MX₂) layers using a combination of magnetron sputtering followed by chemical vapor deposition.

The invention provides a design method for chip spiral inductor with gradual-change metal conductor linewidth and span. Wherein, it calculates the linewidth wn and nearby conductor span sn by following formula: for odd N, wN+w1=wN-1+w2=...=2w(N+1)/2=2w, sN-1+s1=sN-2+s2 =...=s(N+1)/2+s(N-1)/2=2s; for even N, wN+w1=wN-1+w2=...=w(N/2)+1+wN/2=2w, sN-1+s1= sN-2+s2=...=2sN/2=2s; and wn+1>wn, sn+1>sn. This invention reduces vortex effect and near effect generated by spiral inductor at HF to decreases serial equivalent resistance and energy loss.

The invention belongs to the field of electrochemical materials, and discloses a grapheme/carbon nano tube/nickel electrode and a preparation method thereof. The preparation method of the composite material comprises the following steps: a graphene oxide and carbon nano tube mixed solution is prepared; a graphite oxide/carbon nano tube/nickel electrode is prepared through electrophoresis; and the grapheme/carbon nano tube/nickel electrode is prepared. The invention provides the preparation method of the grapheme/carbon nano tube/nickel electrode; as the graphite oxide/carbon nano tube material is directly deposited on an electrode plate, a complicated coating process can be omitted, the process is simple, and the time is short; in addition, equivalent series resistance (ESR) of the graphite oxide/carbon nano tube/nickel electrode is reduced, so that the power density of a super capacitor is increased more efficiently.

A solid electrolytic capacitor includes an anode foil, a solid electrolyte provided on the anode foil and made of conductive polymer, and a cathode foil provided on the solid electrolyte and facing the anode foil across the solid electrolyte. The anode foil includes an anode base made of aluminum, a rough surface layer made of aluminum and provided on a surface of the anode base, and a dielectric oxide layer provided on the rough surface layer and contacting the solid electrolyte. The cathode foil includes a cathode base made of aluminum, and a nickel layer provided on a surface of the cathode base and contacting the solid electrolyte. The nickel layer faces the dielectric oxide layer of the anode foil across the solid electrolyte. The nickel layer is made of nickel and nickel oxide. This solid electrolytic capacitor has a large capacitance and a low equivalent series resistance while being inexpensive and highly reliable.

An electric double layer capacitor comprises: a separator; a pair of electrodes separated by the separator, and the electrodes including activated carbon particles and a binder binding the activated carbon particles; and a pair of collectors separated by the pair of electrodes, wherein a density of the electrodes is in the range of 1.4 g/cm3 to 1.8 g/cm3.