44results about How to "High electromotive force" patented technology

A redox flow battery in which a positive electrode electrolyte stored in a positive electrode tank and a negative electrode electrolyte stored in a negative electrode tank are supplied to a battery element to charge and discharge the battery is provided, the positive electrode electrolyte in the redox flow battery containing a Mn ion as a positive electrode active material, the negative electrode electrolyte containing at least one of a Ti ion, a V ion, and a Cr ion as a negative electrode active material, in which the redox flow battery includes a negative-electrode-side introduction duct in communication with inside of the negative electrode tank from outside thereof, for introducing oxidizing gas into the negative electrode tank, and a supply mechanism for supplying the oxidizing gas into the negative electrode tank via the negative-electrode-side introduction duct.

A redox flow battery charged and discharged by supply of a positive electrode electrolyte stored in a positive electrode tank and a negative electrode electrolyte stored in a negative electrode tank to a battery element, in which the positive electrode electrolyte contains a Mn ion as a positive electrode active material, and the positive electrode tank includes a positive electrode charging pipe opening to a position close to a liquid level of the positive electrode electrolyte in the positive electrode tank, and a positive electrode discharging pipe opening to a position close to the bottom of the positive electrode tank. This redox flow battery can include a stirring mechanism for stirring the electrolytes in the tanks, and can include a connection pipe connecting the positive electrode tank to the negative electrode tank.

The invention relates to a qunatum carbon which comprises carbon particles with the particle size of 0.6-100nm, wherein the carbon particles are mono carbon and/or graphene particles; and the surface layer of the carbon particles contain carbon, hydrogen, oxygen and nitrogen compounds, which comprise condensed aromatics, compounds containing carbon-oxygen single bond, compounds containing carbon-oxygen double bond and compounds containing carbon-hydrogen bond. The invention also relates to a qunatum carbon solution which is a water solution containing qunatum carbon. The ORP of the qunatum carbon solution is 280-380mv, the electric conductivity sigma is 1-5ms/cm, the electromotive force is 280-380mv, the pH value is 1.5-3.2, and the concentration is 0.1-0.45%. The invention also relates to a device and method for preparing the qunatum carbon. The method has the advantages of simple technique, low cost, no generation of three wastes, uniform carbon particle size and stable product quality, is easy to control, and can easily implement large-scale production.

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 lithium secondary battery includes: a positive electrode; and a negative electrode, which further includes a lamination structure comprising: a lithium ion supporting layer capable of supporting lithium ions; and an amorphous-state lithium-based layer in contact directly with the lithium ion supporting layer.

A process for preparing the liquid containing carbon nanoparticles includes such steps as preparing deionized water, preparing graphite carbon plate as positive electrode, arranging two metal plates as negative electrode at both sides of graphite carbon plate, immersing them in said deionized water for 24 hr, applying a low voltage (3-35 v) for 7-10 days to obtain said liquid, laying aside for 24 hr, and ultrasonic treating for 1-2 hr. Its apparatus is composed of casing, circulating pump, supporting frame, plate electrode connecting rods, and positive and negative plate electrodes.

An electrocatalyst for ethanol oxidization includes an elemental mixture containing platinum and ruthenium and at least one element, wherein the foregoing at least one element is selected from the group of tungsten, tin, molybdenum, copper, gold, manganese, and vanadium.

In order to provide a compact and highly efficient electric machine having high power density, an electric machine excited by permanent magnets, comprising a stator and a rotor, is provided. The stator comprises a coil arrangement and the rotor has permanent magnet elements. The coil arrangement comprises a winding and surrounds a flux yoke. The flux yoke comprises at least one limb. Between every two limbs, flux guide parts are arranged that are spaced apart from each other and that are aligned with the ends of the limbs. Neighbouring permanent magnet elements have opposing magnetic orientations and are combined to form a magnet disc. On the side facing away from the limbs of the permanent magnet elements, flux guide parts are arranged. The limbs and the flux guide parts face the permanent magnet elements forming an air gap.

The shock-absorber comprises: a cylinder containing a hydraulic working fluid; a piston slidably arranged in the cylinder so as to split the cylinder into two variable-volume working chambers, namely a first working chamber, or extension chamber, and a second working chamber, or compression chamber; an auxiliary conduit in fluid communication on one side with the first working chamber and on the other with the second working chamber; a train of permanent magnets slidably arranged in the auxiliary conduit so as to reciprocally move along the auxiliary conduit, dragged by the working fluid flowing between the first and second working chambers through the auxiliary conduit as a result of the reciprocating motion of the piston in the cylinder; and electric energy generating device for generating electric energy by exploiting the movement of the train of permanent magnets along the auxiliary conduit.

A lithium primary battery including a negative electrode including metal lithium and/or a lithium alloy, a positive electrode including a positive electrode active material, a separator interposed between the negative electrode and the positive electrode, and a nonaqueous electrolyte. The positive electrode active material includes Fe₂(SO₄)₃. The negative electrode has a coating layer on a facing surface facing the positive electrode, and the coating layer includes a powder or fibrous material.

The production method of the present invention includes (A) a raw material preparation step of preparing a raw material mixture containing at least a manganese compound; (B) a forming step of forming the raw material mixture prepared through the raw material preparation step into a compact having a longitudinal size L and a maximum size R as measured in a direction perpendicular to the longitudinal direction (i.e., in a thickness direction) such that L/R is 3 or more; (C) a firing step of firing the compact obtained through the forming step; and (D) a crushing step of crushing the fired compact obtained through the firing step.

A free-end magnetic circuit adjusting cantilever beam vibration energy collecting device is disclosed. One end of a cantilever beam is inserted into and is fixedly arranged on the fixing end of the cantilever beam. The cross section of the cantilever beam is in a rectangular shape. The tail of the cantilever beam is provided with a counterweight. Two cantilever beam magnet yokes are installed andfixed on the counterweight. A permanent magnet fixing end is close to the free end of the cantilever beam. The fixing end of a permanent magnet is horizontally and symmetrically installed and fixed with a left permanent magnet yoke and a right permanent magnet yoke. A gap is arranged between the left permanent magnet yoke and the right permanent magnet yoke. One side of the left permanent magnet yoke and one side of the right permanent magnet yoke, which are close to the cantilever beam, are provided with two coil supports which are vertically distributed respectively. The left permanent magnet yoke and the right permanent magnet yoke are installed with the permanent magnets. An induction coil is wound on the installation shaft of the two coil supports in each of the left permanent magnetyoke and the right permanent magnet yoke. The two leading-out terminals of the induction coil are connected to an energy collecting circuit. In the invention, energy conversion efficiency is high andvibration damping is small.