88results about How to "Increase electrode density" patented technology

A nickel composite hydroxide represented by Ni1-x-y-zCoxMnyMz(OH)2+A (where 0<=x<=0.35, 0<=y<=0.35, 0<=z<=0.1, 0<x+y, 0<x+y+z<=0.7, 0<=A<=0.5, with M being at least one of V, Mg, Al, Ti, Mo, Nb, Zr and W), a plate-shaped crystal core is generated by allowing a crystal core generating aqueous solution containing cobalt and / or manganese to have a pH value of 7.5 to 11.1 at a standard liquid temperature of 25 DEG C., and slurry for the particle growth containing the plate-shaped crystal core is adjusted to a pH value of 10.5 to 12.5 at a standard liquid temperature of 25 DEG C., while a mixed aqueous solution containing a metal compound containing at least nickel is being supplied thereto, so that the crystal core is grown as particles.

An electrostatic fluid acceleration and method of operation thereof includes at least two synchronously powered stages with final or rear-most electrodes of one stage maintained at substantially the same instantaneous voltage as the immediately adjacent initial or forward-most electrodes of a next stage in an airflow direction. A single power supply or synchronized and phase controlled power supplies provide high voltage power to each of the stages such that both the phase and amplitude of the electric power applied to the corresponding electrodes are aligned in time. The frequency and phase control allows neighboring stages to be closely spaced at a distance of from 1 to 2 times an inter-electrode distance within a stage, and, in any case, minimizing or avoiding production of a back corona current from a corona discharge electrode of one stage to an electrode of a neighboring stage. Corona discharge electrodes of neighboring stages may be horizontally aligned, complementary collector electrodes of all stages being similarly horizontally aligned between and horizontally offset from the corona discharge electrodes.

An electrostatic fluid accelerator includes a first number of corona electrodes and a second number of accelerating electrodes spaced apart from and parallel to adjacent ones of the corona electrodes. An electrical power source is connected to supply the corona and accelerating electrodes with an operating voltage to produce a high intensity electric field in an inter-electrode space between the corona electrodes and the accelerating electrodes. The accelerating electrodes may be made of a high electrical resistivity material, each of the electrodes having mutually perpendicular length and height dimension oriented transverse to a desired fluid flow direction and a width dimension oriented parallel to the desired fluid flow direction. A length of the electrodes in a direction transverse to a desired fluid flow direction is greater than a width of the electrodes parallel to the fluid flow direction, and the width of the electrodes is at least ten times a height of the electrodes in a direction transverse to both the desired fluid flow direction and to the length.

Disclosed is a method for preparing a lithium-metal composite oxide, the method comprising the steps of: (a) mixing an aqueous solution of one or more transition metal-containing precursor compounds with an alkalifying agent and a lithium precursor compound to precipitate hydroxides of the transition metals; (b) mixing the mixture of step (a) with water under supercritical or subcritical conditions to synthesize a lithium-metal composite oxide, and drying the lithium-metal composite oxide; and (c) subjecting the dried lithium-metal composite oxide either to calcination or to granulation and then calcination. Also disclosed are an electrode comprising the lithium-metal composite oxide, and an electrochemical device comprising the electrode. In the disclosed invention, a lithium-metal composite oxide synthesized based on the prior supercritical hydrothermal synthesis method is subjected either to calcination or to granulation and then calcination. Thus, unlike the prior dry calcination method or wet precipitation method, a uniform solid solution can be formed and the ordering of metals in the composite oxide can be improved. Accordingly, the lithium-metal composite oxide can show crystal stability and excellent electrochemical properties.

A negative electrode material provided by the present invention capable of suppressing a decrease in charge acceptance and high temperature storage properties in an electrode with a high capacity and a high density is a mixed carbon material comprising carbon material A having cores of graphite powder with amorphous carbon and / or turbostratic carbon adhered to or coated on the surface of the cores and carbon material B which is graphite powder, the compressibility which is the density (g / cm 3 ) of the material when 1.00 grams of the material are packed into a cylindrical mold with an inner diameter of 15 mm and compressed by applying a pressing force of 8.7 kN and reducing the pressing force to 0.15 kN is 1.60 - 1.78 g / cm 3 for carbon material A and 1.75 - 1.85 g / cm 3 for carbon material B, the compressibility of carbon material A is less than the compressibility of carbon material B, and the mixing ratio (carbon material A / carbon material B) is 1 - 9 as a mass ratio.