119 results about "Discharge potential" patented technology

An object is to provide a power storage device with high discharge capacity and high energy density. The power storage device includes a positive electrode in which a positive electrode active material is formed over a positive electrode current collector; and a negative electrode which faces the positive electrode with an electrolyte interposed therebetween. The positive electrode active material includes a film-form first region which includes a compound containing lithium and nickel; and a film-form second region which includes a compound containing lithium and one or more of iron, manganese, and cobalt, but not containing nickel. The first region is covered with the second region. Since a superficial portion of the positive electrode active material does not contain nickel, nickel is not in contact with an electrolyte solution; thus, generation of a catalyst effect of nickel can be suppressed, and a high discharge potential of nickel can be utilized.

A power storage device including a positive electrode having a positive electrode active material and a positive electrode current collector; and a negative electrode which faces the positive electrode with an electrolyte provided between the negative electrode and the positive electrode is provided. The positive electrode active material includes a first region which includes a phosphate compound containing lithium and nickel; and a second region which covers the first region and includes a compound containing lithium and one or more of iron, manganese, and cobalt, but not containing nickel. Since the entire superficial portion of a particle of the positive electrode active material does not contain nickel, nickel is not in contact with an electrolyte solution; thus, generation of a catalyst effect of nickel can be suppressed, and a high discharge potential of nickel can be utilized.

A lithium ion secondary battery comprising a positive electrode, a non-aqueous electrolyte, a separator and a negative electrode comprising a carbon material capable of charging and discharging lithium ions, said negative electrode containing at least one type of graphite material which satisfies the following conditions (a) and (b): (a) a graphite material falling within a defined region in the relation between its particle size and specific surface area; (b) in Raman spectroscopic analysis, the ratio of the strength of the peak existing in the region of 1,350-1,370 cm-1 (IB) to the strength of the peak existing in the region of 1,570-1,620 cm-1 (IA), which is represented by an R value (IB/IA), is 0.001 to 0.2. This battery has high capacity and is also excellent in rapid charge/discharge characteristics, flatness of charge/discharge potential and cycle performance.

A gate driver and a display device including the gate driver are provided which can prevent an abnormal output of a gate-high voltage from a stage by stably maintaining a discharge potential of a pull-up node. The gate driver includes a plurality of stages, and each stage includes a pull-up transistor that outputs a clock signal input to a first clock terminal to an output terminal depending on a voltage of a pull-up node; a pull-down transistor that outputs a first source voltage input to a first source voltage terminal to the output terminal depending on a voltage of a pull-down node; and a first noise removing unit that supplies a gate-off voltage to the pull-up node to remove noise of the pull-up node in response to the clock signal input to the first clock terminal.

The invention discloses a fluorine and vanadium ion-doped lithium iron phosphate material and a preparation method thereof. The fluorine and vanadium ion-doped lithium iron phosphate material has a general chemical formula of LiFe1-yVy(PO4)1-xF3x/C, wherein x is equal to or greater than 0.01 and less than or equal to 0.5; y is equal to or greater than 0.01 and less than or equal to 0.5; and the sum of x and y is equal to or greater than 0.02 and less than or equal to 1.0. The preparation method provided by the invention comprises the following steps of mixing one or more lithium salts, one or more ferric salts, one or more phosphates, one or more carbon sources and doping agents of one or more fluorides and one or more vanadium compounds according to a certain ratio, adding a mixing medium into the mixture, carrying out ball milling mixing, carrying out pre-sintering, carrying out calcining at a high temperature, cooling, and grinding to obtain the fluorine and vanadium ion-doped lithium iron phosphate material. The preparation method provided by the invention realizes synthesis of the fluorine and vanadium ion-doped lithium iron phosphate material by a carbothermal reduction method which is obtained by improvement of the traditional solid phase method. The fluorine and vanadium ion-doped lithium iron phosphate material has excellent multiplying power charge-discharge performances and discharge potential platform electrochemical performances. The preparation method has simple processes, low energy consumption and low costs of raw materials, and is convenient for industrial production.

It is an object of the present invention to provide a positive electrode material having a large ratio of the discharge capacity around 4 V to the total discharge capacity including the discharge capacity at 4V or lower while making the discharge capacity around 4 V sufficient, for the purpose of providing a lithium secondary battery using a lithium transition metal phosphate compound excellent in thermal stability, utilizing the discharge potential around 4V (vs. Li/Li⁺) that is higher than the discharge potential of LiFePO₄, and being advantageous with respect to the detection of the end of discharge state, and a lithium secondary battery using the same. The present invention uses a positive active material for a lithium secondary battery containing a lithium transition metal phosphate compound represented by LiMn_1-x-yFe_xCo_yPO₄ (0.1≦x≦0.2, 0<y≦0.2).

A nonaqueous electrolytic secondary battery capable of improving the operating cycle characteristic is provided. This nonaqueous electrolytic secondary battery comprises a positive electrode containing a positive electrode active material including Li_xFeS₂ (0≦x≦4), a negative electrode containing a material occluding and emitting lithium ions and a nonaqueous electrolyte, and the final discharge potential of the positive electrode is set to a prescribed level exceeding the minimum potential allowing discharge reaction expressed in the following formula (3):

FeS₂+xLi⁺→Li_xFeS₂  (3)

A chemical process to formulate conductive ink with low sintering temperature for inkjet printing is described and shown. The application of fabricated flexible conductive film on lithium ion batteries is also described. This chemical method and composition can remove the oxidation on metallic nanoparticle surface during ink fabrication and sintering processes. Etched metallic ions in the conductive ink are reduced and particles bridged while annealing printed patterns to achieve low temperature sintering at about 350° C. The chemical process can be applied on nickel materials that are excellent current collectors for lithium ion batteries due to high chemical stability especially at high charging-discharging potential of less than 3 Volts. Thermal decomposition and chemical reduction of silver salts are two methods disclosed for particle-free silver ink. Surfactant additive further make silver film more uniform and easier to be sintered.

The invention discloses a high-capacity lithium ion battery gradient cathode material and a preparation method of the material. The high-capacity lithium ion battery gradient cathode material contains a cobalt source substance, a lithium source material, a doping agent M and a cladding material, wherein the molar ratio of Li to Co is 0.95-1.2; the doping amount of the doping agent M is 0.01-10wt%, and the doping amount of the clad material is 0.01-20wt%. The high-capacity lithium ion battery gradient cathode material and the preparation method of the material solve the problems in the prior art; the high-capacity lithium ion battery gradient cathode material not only improves the structural stability of core material lithium cobalt oxide, but also improves the stability of shell material, and reduces the difference between resistance and discharge potential of the shell material and the core material so that the shell material and the core material reach a more consistent level on the aspect of Li+ deintercalation; secondly, the active substance is coated on the raw material, so that the complementary advantages between the core material lithium cobalt oxide and the shell material can be realized; furthermore, Co has continuous concentration change from the core material to the shell material, so that the cladding function is fully exerted, the material structure is stabilized, and the safety and the electrochemical performance of the material are improved.

A plasma display panel capable of increasing a luminous efficiency while decreasing discharge firing voltage while easily generating an address discharge by generating a sustain discharge as facing discharge. The discharge sustain electrodes are on barrier ribs between the two substrates. One of the sustain discharge electrodes extends between discharge cells and the other extends through discharge cells dividing discharge cells into two portions. Each discharge sustain electrode is surrounded by a dielectric material and also a non-transparent MgO protective layer. These electrodes are formed to be tall and narrow to allow for superior facing discharge potential.

A decode circuit for selecting one of a plurality of output lines in dependence on the status of a plurality of input lines, the circuit comprising: a first decode arrangement comprising: a first decode node; first precharging circuitry for charging the first decode node to a charging potential; first discharging circuitry comprising a plurality of switching means each operable in dependence on the status of a respective one of the input lines to couple the first decode node to a discharging potential, and first selection circuitry coupled to a respective one of the output lines and operable in response to a first enable signal to select that output line if the first decode node has not discharged; and a second decode arrangement comprising: a second decode node; second precharging circuitry for charging the second decode node to a charging potential; second discharging circuitry comprising a plurality of switching means each operable in dependence on the status of a respective one of the input lines to couple the second decode node to a discharging potential; and second selection circuitry coupled to a respective one of the output lines and operable in response to a second enable signal to select that output line if the second discharge node has not discharged; wherein the first enable signal is derived from the potential of the second decode node.

The invention discloses a high-cycle lithium ion battery multi-element anode material NCM and a preparation method thereof. The multi-element anode material comprises a surface modified layer with the structure formula of LixNi1-y-zCoyMnzO2, wherein x is larger than or equal to 1 and smaller than or equal to 1.2, y is larger than or equal to 0 and smaller than or equal to 1/3, and z is larger than or equal to 0 and smaller than or equal to 1/3. The preparation method includes the steps of evenly mixing and sintering soluble lithium salt, multi-element precursors and dispersing agent, mixing and sintering the mixture and a wrapping material B again, and obtaining the multi-element anode material. Dispersing agent is added in the reaction process, and therefore the reaction uniformity is improved, and the oxygen defects caused in the reaction process are reduced or eliminated. By means of the prepared anode material, the structural stability of the material is improved, the difference between resistance and discharge potential of the material is reduced, the resistance and discharge potential can reach consistency on the aspect of de-intercalation of lithium ions, the structure of the material is stabilized, and the safety and electrochemical performance of the material are improved.

A positive electrode active material having an average discharge potential of 4.5V or more to Li is used. A solvent of the electrolyte is a combination of a high-dielectric solvent such as ethylene carbonate and at least one of dimethyl carbonate or ethyl methyl carbonate. The decrease of the capacity due to cycle and the degradation of the reliability due to high temperature are prevented. The operating voltage is high.

The invention discloses a magnesium alloy anode rolled board and a preparing method and application thereof. The preparing method comprises the steps that magnesium, aluminum, lead, zinc and manganeseare put into a graphite crucible, argon is led in, stirred melt is casted in a stainless steel crucible in the a furnace, and an as-cast zinc and manganese modified AP65 magnesium alloy is obtained;under the argon protective atmosphere, the as-cast zinc and manganese modified AP65 magnesium alloy is subject to homogenizing annealing and then water quenching; rollers are preheated and heated, andan AP65 board is subject to intermediate annealing between two adjacent rolling passes, multi-pass hot rolling is carried out, the rolling pressing amount is controlled, and the magnesium alloy anoderolled board is obtained. Through alloying and rolling deforming, the microscopic structure of the AP65 magnesium alloy is regulated and controlled, under the open-circuit electric potential, good corrosion resistance is achieved, hydrogen evolution can be evenly dissolved and restrained through large-current density discharge, the negative discharge potential and the higher current efficiency can be achieved, and the magnesium alloy anode rolled board is suitable for being used a high-power ocean activated battery and magnesium-air battery anode material.

The invention relates to the field of alloy materials, in particular to a magnesium alloy material as well as a preparation method and application of magnesium alloy material. The magnesium alloy material comprises the following components of, in percentage by mass, 0.01%-6% of Hg, 0.01%-5% of Ga, 0.01%-6.5% of La, 0.01%-5% of Ce, less than or equal to 0.01% of Fe, less than or equal to 0.01% of Cu, less than or equal to 0.01% of Ni, and the balance Mg. The magnesium alloy material has excellent performance, a hydrogen evolution reaction can be effectively inhibited, the activation time is short, and the utilization rate of discharge potential is higher relative to cathode and anode.

The invention provides a backflow anti-blocking drip irrigation system and an anti-blocking drip irrigation capillary. The system comprises a drip irrigation tape, wherein the drip irrigation tape is composed of multiple anti-blocking drip irrigation capillaries, the tail ends of the multiple anti-blocking drip irrigation capillaries communicate with a backflow pipe, and the backflow pipe communicates with a water storage tank to form a closed-loop drip irrigation system. The anti-blocking drip irrigation capillary comprises a capillary main body; water outlet drip holes are formed in the capillary main body; an energy-dissipation baffle is installed at a position on the inner wall of the capillary main body where the water outlet drip holes are located; a water inlet hole formed in the energy-dissipation baffle, and a semi-closed inclined baffle is disposed on the water inlet hole. Through increase of a water flowing rate in the capillaries of the annular drip irrigation system, sand transportation and discharge potential of the capillaries are improved and the quantity of mud and sand deposited in the capillaries is reduced. Water in the capillary main body is made to flow backwards from the water inlet hole into the energy-dissipation baffle, the quantity of mud and sand particles in a mainstream area inside the capillary and sedimentation particles on the capillary bottom entering a drip head is reduced, and the anti-blocking performance of the drip irrigation system is improved.

The invention discloses a making method of a lithium ion battery, and concretely relates to a making method of a lithium ion battery adopting a doped and modified lithium manganate material as a positive electrode and a carbon coated lithium titanate material as a negative electrode. Aluminum and sulfur element doping modification of the lithium manganate material inhibits a Jahn-Teller effect; and the carbon coated lithium titanate material is adopted as the negative electrode, so the disadvantage of metal lithium dendrite precipitation induced by too low potential of a graphite negative electrode is solved, the discharge potential of the lithium manganate material is effectively restricted, and the integral cycle performances of the battery are greatly improved. The battery can be used in power batteries of electric cars and large energy storage batteries.

The invention relates to a chargeable and dischargeable aqueous aluminum ion battery and a preparation process thereof, belonging to the technical field of batteries. The aqueous aluminum ion batterymainly comprises a cathode, an anode, an electrolyte and a diaphragm, wherein the cathode material is birnessite manganate, the anode is metal aluminum and alloy thereof, the electrolyte is an aluminum trifluoromethanesulfonate aqueous solution, and the cathode, the anode, the electrolyte and the diaphragm form a primary battery system. The interlayer spacing of the birnessite manganate MxMnOy.nH2O (M is a metal cation) is about 0.72nm, and lattice water exists between the layers. The secondary aluminum ion battery is high in capacity (530mAhg<-1>, relative to the birnessite manganate), is proper in discharge potential platform (1.0-1.4V vs. A13+/Al), is very good in the corresponding cathode capacity density (530-740Wh g<-1>), is wide in material source, easy to prepare, simple to assemble, low in cost and green and environmental.

The invention relates to a vacuum switch device, which reduces the cost and improves the reliability by simplifying the signal processing circuit of the vacuum pressure diagnosis device. The vacuum switching device is composed of a floating potential metal container (12), two insulating sleeves, and a pair of electrodes capable of contacting and separating. The measuring terminal (50) for vacuum pressure diagnosis is arranged opposite to the metal container (12). The metal container (12) and the measuring terminal (50) are casted by an insulator (20) such as epoxy, and the outer periphery of the insulator (20) is The portion is provided with a grounded conductive coating (21). Through the grounded conductive coating (21), the ground capacity of the metal container (12) is increased, so the potential of the metal container (12) during operation is close to the ground potential. When the vacuum pressure deteriorates, if a discharge occurs between the main circuit and the metal container (12), the potential of the metal container (12) is equal to the system potential, so it can be detected based on the potential rise of the system frequency occurring on the metal container (12). Deterioration of vacuum pressure.