138results about How to "Increased ion mobility" patented technology

The object of providing a non-volatile semiconductor memory that stands out by good scalability and a high retention time as well as ensures low switching voltages at low switching times and achieves a great number of switching cycles at good temperature stability is solved by the present invention with a semiconductor memory whose memory cells comprise at least one silicon matrix material layer with open or disturbed nanocrystalline or amorphous network structures and structural voids which has a resistively switching property between two stable states, utilizing the ion drift in the silicon matrix material layer. The memory concept suggested in the present invention thus offers an alternative to the flash and DRAM memory concepts since it is not based on the storing of charges, but on the difference of the electric resistance between two stable states that are caused by the mobility of ions in the amorphous silicon matrix material with an externally applied electric field.

A core glass and a fiber-optic light guide made from it are described. The core glass is in the alkali-zinc-silicate system and contains, in Mol % on an oxide basis: 54.5-65, SiO₂; 18.5-30, ZnO; 8-20, Σ alkali oxides; 0.5-3, La₂O₃; 2-5, ZrO₂; 0.02-5, HfO₂; 2.02-5, ΣZrO₂+HfO₂; 0.4-6, BaO; 0-6, SrO; 0-2, MgO; 0-2, CaO; 0.4-6, Σ alkaline earth oxides; 0.5-3, Li₂O, but no more Li₂O than 25% of the Σ alkali oxides; >58.5, Σ SiO₂+ZrO₂+HfO₂. A molar ratio of Na₂O/K₂O is from 1/1.1 to 1/0.3. A molar ratio of ZnO to BaO is greater than 3.5.

The invention discloses a method for performing carbon coating modification on nano-powder by adopting a water-soluble polymer. The method comprises the following steps: weighing the water-soluble polymer (such as one or more of industrial modified starch, glucose and the like), surface active agent and the nano-powder according to the weight ratio of (0.1-10) : (0-5) : (80-100) as solid raw materials, preparing slurry with a dissolution and dispersion agent according to the solid-liquid ratio of (1-1000) g/50mL, uniformly stirring and dispersing, then performing suction filtration (or centrifugation) and drying to get a precursor, and then annealing at the temperature of 300 DEG C-700 DEG C under a protective atmosphere to get the nano-powder with good carbon-coating property. According to the method disclosed by the invention, the surface uniform carbon coating can be effectively performed on nano-material, electron and ion migration ratio in the material can be accelerated, the agglomeration of the nano-material can be inhibited, the void ratio and the like of the material can be improved, and the performance advantages of the nano-material can be further enhanced.

An activated carbon having the highest peak D within the range of 1.0 nm to 1.5 nm, in which the peak D is from 0.012 to 0.050 cm³/g and is from 2% to 32% to a total pore volume, in pore size distribution as calculated by BJH method from N₂-adsorption isotherm at 77.4 K. An electric double layer capacitor comprising the polarizable electrode which comprises the activated carbon, carbon fiber, carbon black, and binder.

The present application is directed to compositions and methods of preparing carbon materials. The carbon materials prepared according to compositions and methods described herein comprise enhanced electrochemical properties and find utility in any number of electrical devices, for example, as electrode material in ultracapacitors.

The invention discloses a high-nickel positive electrode material with a composite coating layer and a preparation method thereof. The preparation method comprises the following steps: (1) uniformly mixing a high-nickel positive electrode material and a nano-coating material, and carrying out high-temperature sintering, cooling, crushing and sieving in a preheated muffle furnace under an oxygen atmosphere to obtain a nano-material-coated high-nickel positive electrode material; and (2) adding the high-nickel positive electrode material coated with the nano material into deionized water dissolved with a soluble lithium compound, uniformly stirring, slowly adding soluble phosphate, uniformly stirring, carrying out vacuum filtration, drying and re-burning in a kiln, cooling, crushing and sieving to obtain the high-nickel positive electrode material with the composite coating layer. According to the high-nickel positive electrode material with a composite coating layer and the preparationmethod thereof, multi-layer uniform coating of the nano material and phosphate is realized through dry-process and wet-process coating, and the prepared positive electrode material has the advantagesof good cycle performance, good thermal stability and the like, and the preparation process is simple, and the positive electrode material can be used for industrial mass production and has a wide application prospect in lithium ion battery production.

The invention provides a preparation method of lithium yttrium halide and application thereof in a solid electrolyte and a battery. The preparation method of the lithium yttrium halide comprises the following steps: (1) supplying yttrium halide salt and lithium salt to a ball mill tank for mechanical synthesis; (2) annealing a mechanically synthesized product under the protection of inert gas to obtain the lithium yttrium halide with a chemical formula of Li3YAxB6-x, wherein A is Cl<-> and/or Br<->, and B is selected from at least one of I<->, F<->, BF<4->, PF<6->, BOB<->, TFSI<-> and FSI<->;x is more than 0 and less than or equal to 6. The method can be carried out under normal pressure, and the raw materials are low in cost; the prepared Li3YCl6 is high in thermal stability and high incrystallinity, and has relatively high electrical conductivity at normal temperature.

The invention discloses a functional nanoparticle and a preparation method and application thereof. The preparation method comprises the following steps that 1) a siloxane precursor and water react under existence of a catalyst so that a prepolymer is obtained, wherein the siloxane precursor comprises at least one of the following function groups: amino, carboxyl, cyano, nitrogen heterocyclic and mercapto; and 2) the prepolymer and inorganic nanoparticles react in an organic solvent under the inert atmosphere so that functional nanoparticles are obtained. The preparation method is simple, stable in performance, low in price and convenient for industrial production and practical application. The functional nanoparticles are added to an electrolyte so that performance of the electrolyte can be obviously improved, e.g. the electrolyte can be gelatinized, and stability can be greatly enhanced. Besides, conductive capability and ion transmission and diffusion of the electrolyte can also be improved. Therefore, the functional nanoparticles are applied to a dye-sensitized solar cell so that open-circuit voltage, short-circuit current and photoelectric conversion efficiency of the cell can be obviously enhanced.

The invention discloses a NiCl2-GICs composite anode material for a thermal battery and its preparation method. The anode material comprises NiCl2, graphite and alkali halide co-fused salt. The mass percent of the NiCl2 is 10-15%, the mass percent of the graphite is 55-70%m, and the mass percent of the alkali halide co-fused salt is 20-30%. The NiCl2-GICs composite anode material prepared by the invention has the advantages of being high in ion migration rate, good in thermal stability, strong in electrochemical activity, and others. The preparation method applies the dissolving property of NiCl2 in a fusing salt under high temperature, and reduces temperature for inserting action by the fusing salt method; besides, a fusing salt electrolyte shell encircled by fusing salt is applied, so that the NiCl2-GICs composite anode material is prepared. The method is high in atom utilization rate, free from waste discharge, and potential to apply to projects in a thermal battery product.

The invention discloses a high-voltage super-capacitor. The high-voltage super-capacitor comprises a positive electrode, a negative electrode, isolation paper and high-voltage-resisting electrolyte, wherein the high-voltage-resisting electrolyte comprises dissociative salt and a high-voltage stabilizer; and an electrode material of the high-voltage super-capacitor comprises electrode auxiliary materials including carbon nanotubes, nano aluminum oxide and the like. By improving the electrolyte and the electrode material and matching with a super-capacitor single body, the voltage of the super-capacitor single body is improved to 3V, a condition that gas is generated when the super-capacitor works at high voltage is remarkably reduced, and the long durability of the super-capacitor under a 3V working voltage is really realized; and tests show that the probability of switching on an explosion-proof valve is greatly reduced when the super-capacitor is operated for 1000h at constant temperature and constant voltage of 60 DEG C and 3V in a loaded manner, the resistance after operation is 1.94 times lower than that before operation, and the capacity keeping rate is 78.50% or more.

The invention discloses a silicate electrolyte for a battery, and the electrolyte comprises the following components by weight percent: 20-45% of sulfuric acid, 1-2% of ammonium phosphate, 10-15% of silicon dioxide, 2-3% of ammonium persulfate, 1-1.5% of sodium sulfate, 1-1.5% of potassium sulfate, 1-2% of polyacrylamide, 1-2% of dispersant, 2-3% of stabilizer, 3-5% of catalyst and the balance ofdeionized water, wherein the catalyst is one of basic salt, silane and silicone oil. The silicate electrolyte has the advantages of good performance, environment friendliness and favorable industrialapplication prospect.

An ion mobility separator 4 and a method of separating ions according to their ion mobility are disclosed. An RF ion guide is provided having a plurality of electrodes that are arranged to form an ion guiding path that extends in a closed loop. RF voltages are supplied to at least some of the electrodes in order to confine ions within said ion guiding path. A DC voltage gradient is maintained along at least a portion of a longitudinal axis of the ion guide, wherein the voltage gradient urges ions to undergo one or more cycles around the ion guide and thus causes the ions to separate according to their ion mobility as the ions pass along the ion guide. The closed loop ion guide enables the resolution of the ion mobility separator to be increased without necessitating a large device, since the drift length through the device can be increased by causing the ions to undergo multiple cycles around the device.