52results about How to "High energy capacity" patented technology

A battery on a conductive metal wire and components of a battery on a conductive metal wire of circular cross section diameter of 5-500 micrometers and methods of making the battery and battery components are disclosed. In one embodiment, the battery features a porous anode or cathode layer which assist with ion exchange in batteries. Methods of forming the porous anode or cathode layer include deposition of an inert gas or hydrogen enriched carbon or silicon layer on a heated metal wire followed by annealing of the inert gas or hydrogen enriched carbon silicon layer. Energy storage devices having bundles of batteries on wires are also disclosed as are other energy storage devices.

The reversible hydraulic pressure converter (1) employing tubular valves includes a medium-pressure stage (44) consisting of a medium-pressure cylinder (2) and a double-acting medium-pressure piston (3) the position of which is sent to a control computer of the converter (19) by a piston position sensor (14), the cylinder (2) and the piston (3) forming two medium-pressure chambers (5) that can be placed in communication with a medium-pressure inlet-outlet circuit (15) by at least one tubular valve (12), the converter (1) also including two high-pressure cylinders (9) each cooperating with a high-pressure piston (8) of smaller diameter and defining two high-pressure chambers (11) that can be placed in communication with a high-pressure inlet-outlet circuit (16) by at least one tubular valve (12), each of the various tubular valves (12) cooperating with an independent valve actuator (13).

A lithium-ion battery is provided and related methods. The lithium-ion battery includes an electrode comprising an Olivine flake-like structure and an electrode comprising a plurality of coated carbon nanofibers. The Olivine flake-like structures form clusters through which the lithium ions are transported while reducing initial cycle irreversibility. The electrode comprising the coated carbon nanofibers additionally reduce initial cycle irreversibility by controlling expansion of the substrate forming the electrode comprising the coated carbon nanofibers.

The invention provides a high-capacity positive electrode active material capable of sufficiently exploiting the excellent characteristics of magnesium metal or the like as a negative electrode active material, such as high energy capacity; a method for producing the same; and an electrochemical device using the positive electrode active material. A positive electrode 11 includes a positive electrode can 1, a positive pole pellet 2 having a positive electrode active material and the like, and a metal mesh support 3. A negative electrode 12 includes a negative electrode cap 4 and a negative electrode active material 5 such as magnesium metal. The positive electrode pellet 2 and the negative electrode active material 5 are disposed so as to sandwich a separator 6, and an electrolyte 7 is injected into the separator 6. The positive electrode active material, which provides the feature of the invention, is synthesized by a step of reacting a permanganate, such as potassium permanganate, with hydrochloric acid preferably having a concentration of 3 to 4 mol/l to produce a precipitate, and a step of filtering the precipitate, thoroughly washing the filtered precipitate with water, and then subjecting the washed precipitate to heat treatment preferably at a temperature of 300 to 400° C. for not less than 2 hours, thereby giving a manganese oxide.

A capacitor-assisted hybrid lithium-ion electrochemical cell assembly includes two positive electrodes having a first polarity, each having at least two electrically conductive tabs disposed on at least one first edge and at least one second edge. Further, two negative electrodes having a second polarity each having at least two electrically conductive tabs disposed on at least one first edge and at least one second edge. At least one of the two positive electrodes or negative electrodes are distinct from one another. The electrically conductive tabs are substantially aligned in the electrochemical cell to respectively define a plurality of positive electrical connectors and a plurality of negative electrical connectors to reduce current density during high power charging and discharging.

The invention discloses a low-voltage varistor ceramic chip which is formed by sintering mixed powder. The mixed powder comprises, by mass, 94-96% of ZnO, 0.2-4% of Bi2O3, 0.1-0.6% of MnCO3, 0.1-2% of Co3O4, 0.1-0.6% of NiO, 0.002-0.02% of Al(NO3)3, 0.1-0.5% of TiO2, 0.01-0.5% of Nb2O5, and 0.01-2% of Sb2O3. With the low-voltage varistor, low-voltage varistor 8/20 [mu]s waveform through-flow performance can be well improved, and low-voltage varistor energy-bearing capacity can be improved. The high-energy low-voltage varistor has good lightening resistance. Also, the invention provides a preparation method of the low-voltage varistor ceramic chip and a preparation method of the low-voltage varistor.

Li-Ion/Polysulfide flow battery systems are provided to achieve high energy density and long service life. The system is configured to minimize corrosion of the lithium electrode by providing an electrochemical reactor comprising a first and a second electrode configured in spaced apart relation defining an inter-electrode channel through which the sulfur electrolyte is caused to flow.

A method for forming lithium metal oxides comprised of Ni, Mn and Co useful for making lithium ion batteries comprises providing precursor particulates of Ni and Co that are of a particular size that allows the formation of improved lithium metal oxides. The method allows the formation of lithium metal oxides having improved safety while retaining good capacity and rate capability. In particular, the method allows for the formation of lithium metal oxide where the primary particle surface Mn/Ni ratio is greater than the bulk Mn/Ni. Likewise the method allows the formation of lithium metal oxides with secondary particles having much higher densities allowing for higher cathode densities and battery capacities while retaining good capacity and rate performance.

A lead acid battery having lightly gelled electrolyte is provided. The lead acid battery includes a plurality of alternating positive plates and negative plates, a plurality of separators sandwiched in between the positive plates and the negative plates, and a lightly gelled electrolyte including dilute sulfuric acid and silica particles substantially in the range of 0.1% to 3% of the electrolyte by weight. The silica particles are fumed silica particles.

In a method for reducing the dendritic metal deposition on an electrode, a non-dendritic state of the metal deposition is ascertained, and a magnetic or electric field is generated at the electrode and is modulated in such a way that it stabilizes the non-dendritic state of the metal deposition. The method is applied, e.g., to a lithium-ion rechargeable battery including an anode having an anode arrester, a cathode having a cathode arrester, and a separator, which are situated in a housing, in which a dendritic metal deposition at the anode is reduced with the aid of the method.

An energy storage device (battery) includes an electrode assembly having current collecting tabs, each of which is formed of a plurality of projecting portions, projecting from a first straight line portion on one side in a stacking direction of electrode sheets. The electrode assembly is housed in a case (exterior body). The energy storage device further includes current collectors, which are electrically connected to the external terminals, disposed on the case. The current collectors, are connected to the current collecting tabs, arranged in a stacking direction of the electrode sheets, on a second straight line portion side where the projecting portions, are not formed.

The invention belongs to the field of metal sulfide nano-materials, and particularly relates to a method for preparing a carbon-loaded metal sulfide nanocomposite through electrostatic spinning, whichcomprises the following steps: (1) preparing a spinning precursor solution: respectively dissolving a thiacalixarene metal cluster compound and a spinning aid in DMF (Dimethyl Formamide), and mixing;(2) preparing nano-fibers by electrostatic spinning: sucking the obtained spinning precursor solution into an injector, adjusting the pump flow rate and voltage of the injector and the distance between a spinning needle and a receiving plate, spinning, and receiving a nano-fiber felt by the receiving plate; (3) pre-oxidizing the nano-fiber felt: pre-oxidizing the collected nano-fiber felt; and (4) carbonizing in an N2 atmosphere: carbonizing the pre-oxidized nano-fiber felt, and naturally cooling to obtain the target product. The target product is ideal in electrochemical performance and goodin capacitance characteristic, the flaky carbon material is directly used as an electrode, additives or impurities such as a binding agent can be eliminated, and the energy capacity and performance are improved.

A solid state supercapacitor and a method for manufacturing the same is provided, the solid state supercapacitor including two nanowire electrodes with their surface full of nanowire bundle and a dielectric material filled in a space between the two nanowire bundle electrodes and the nanowire bundle, wherein the nanowire bundle includes many nanowires to increase the surface area of electrodes; since the two nanowire bundle electrodes include the nanowire bundle, the surface area thereof is large; a dielectric layer is the original material of the dielectric material, directly reacted, deposited and cured in the space between the two nanowire bundle electrodes without causing pollutions due to additional processing; therefore, the dielectric layer is of high purity and density and has high permittivity to achieve the greatest permittivity of the dielectric material. As a result, the energy capacity of unit volume of the capacitor is effectively increased.

An object of the present invention is to provide an electric double layer capacitor which has a high withstand voltage, and is resistant to degradation and excellent in long term reliability. Disclosed is an electrolytic solution for an electric double layer capacitor including a solvent (I) for dissolving an electrolyte salt and an electrolyte salt (II), wherein the solvent (I) for dissolving an electrolyte salt includes a sulfolane compound and a fluorine-containing chain ether. Also disclosed is an electric double layer capacitor using the electrolytic solution.

The present invention provides a charge storage device, comprising a pair of electrodes, each electrode being operable to store electric charge and having a respective capacitance Cp, CN that is different to the other, with the ratio of the capacitances CP/CN being greater than 1. In exemplary embodiments, the charge storage device may be an asymmetrical supercapacitor, which is operable to provide an enhanced energy capacity by increasing the cell voltage through unequalising the electrode capacitance. Hence, by increasing the CP/CN ratio an improved power capability can be achieved over conventional devices, while offering a simple and low cost manufacturing strategy. The present invention has particular application with cameras, electric vehicles, elevators, renewable energy stores, fuel cells, batteries and many forms of electronic devices.

The invention describes a processing device for rail systems in urban areas, having a travel drive (5), a processing drive (6) and a contour-defining, rotationally driven processing tool (7) mounted in a floating manner on a shaft (10) arranged in a housing (11), wherein the processing tool (7), the housing (11) and the shaft (10) are arranged on a chassis (2) having wheels (3) and can be placed by a feed drive (8) against a rail head (13) to be processed. In order to configure a device of the type described at the outset in such a way that it has a compact design such that it can be used forprocessing rail systems in urban areas both above ground and below ground, it is proposed that the processing tool (7) is of pot-shaped design and attached end-side by its base to the shaft (10), wherein the circumferential surface of the cutting edge-bearing flank of the processing tool (7) at least partially circumferentially encloses the shaft (10) and the closer-situated shaft bearing (12).