166 results about "Ionic diffusion" patented technology

Electrochemical cells or batteries featuring functional gradations, and having desirable, periodic configurations, and methods for making the same. One or more methods, in alone or in combination, are utilized to fabricate components of such electrochemical cells or batteries, which are designed to achieve certain thermal, mechanical, kinetic and spatial characteristics, and their effects, singly and in all possible combinations, on battery performance. The thermal characteristics relate to temperature distribution during charge and discharge processes. The kinetic characteristics relate to rate performance of the cells or batteries such as the ionic diffusion process and electron conduction. The mechanical characteristics relate to lifetime and efficiency of the cells or batteries such as the strength and moduli of the component materials. Finally, the spatial characteristics relate to the energy and power densities, stress and temperature mitigation mechanisms, and diffusion and conduction enhancements. The electrochemical cells or batteries constructed according to the methods presented in this invention are useful for all applications that require high rate performance, high energy/power density, good durability, high safety and long lifetime.

The invention relates to a battery anode material and discloses a metal ion doping and carbon coating jointly modified lithium ion battery anode material, which comprises a lithium iron phosphate anode substrate synthesized by using LiOH.H2O and FePO4.4H2O, and is characterized in that: the lithium iron phosphate anode substrate contains at least one metal ion which may be Mn<2+>, Ni<2+>, Co<3+>, Cu<2+>, Zn<2+>, Zr<4+>, Al<3+>, Sn<4+>, Nb<5+>, Mg<2+> or Ti<4+>; and the surface of the lithium iron phosphate anode substrate is uniformly coated with carbon. In the lithium ion battery anode material, the metal ion is doped at the lithium position to produce a lithium ion vacancy in the crystal lattice of the lithium iron phosphate, so the electron conductivity and ionic diffusion coefficient of the lithium ion battery anode material are improved and the discharge capacity and the circulation stability of the lithium ion battery anode material are improved. The method for manufacturing metal ion doping and carbon coating jointly modified lithium ion battery anode material is simple, easy to implement, obvious in effect and low in cost.

A microporous polyethylene battery separator material (212), for use in a flooded-cell type lead-acid battery, benefits from increased porosity, enhanced wettability, and exceptionally low electrical resistance when an electrolyte-soluble pore former is employed in the manufacturing process. The pore former (210) is soluble in electrolytic fluid and therefore dissolves in-situ in sulfuric acid during battery assembly. The dissolution of the pore former leaves behind additional, larger voids (220) in the separator material and thereby enhances ionic diffusion and improves battery performance.

The invention discloses a method for preparing high performance lithium ion battery negative electrode material porous carbon covering exposed (001) active crystal titanium dioxide nanocubes. The method for preparing the high performance lithium ion battery negative electrode material porous carbon covering exposed (001) active crystal titanium dioxide nanocubes adopts phenolic resin spheres as a carbon source to compound porous carbon materials, wherein titanium source compounds are dissolved into ethyl alcohol to be prepared to be colloidal sol, the colloidal sol is added into a supernatant solution of phenolic resins, deionized water and hydrochloric acids to be stirred, and is added with hydrofluoric acids to be used as a crystal control agent, and then has a water thermal reaction, thereby obtaining product materials by utilizing a high temperature furnace to treat at last. A composite material which is composted through the method has large radio surface area, rich porous structures, exposed active crystal surfaces, combines the advantages of the radio surface area, porous structures and active crystal surfaces, reduces transmission distance of ions and electrons, improves electrical conductivity and ionic diffusion rate, is applied in lithium ion batteries, has excellent specific capacity and stable cycle performance, and is an ideal lithium ion battery negative material.

The invention discloses a testing technology for electrochemical parameters of under-deposit corrosion and a special primary and secondary matched double-electrolytic tank thereof. The electrolytic tank device comprises an organic glass double-electrolytic tank body, a working electrode, auxiliary electrodes, reference electrodes and an ion diffusion passage. The organic glass double-electrolytic tank body consists of an outer electrolytic tank and an inner electrolytic tank, wherein the outer electrolytic tank is an open system which is provided with a vent and used for measuring a body solution anode region, and the inner electrolytic tank is a closed device for measuring a cathode region in a closed micro-environment under a deposit layer. The working electrode, the auxiliary electrodes and the reference electrodes are fixed through rubber plugs on top covers of the electrolytic tanks and used for measuring the electrochemical parameters. The ion diffusion passage is an organic glass passage for connecting the inner electrolytic tank with the outer electrolytic tank, is filled with a corrosive deposit layer for simulating a real deposit layer environment and realizing exchange of internal and external ions of the deposit layer, and is fixed through a bolt plug. The electrolytic tank is used for measuring the various electrochemical parameters of the under-deposit corrosion conveniently, and can be used for accurately simulating the internal and external corrosive environments of the deposit layer and obtaining the information and dynamic changes of an under-deposit corrosion process.

Disclosed is a wiring structure and method of forming the structure with a conductive diffusion barrier layer having a thick upper portion and thin lower portion. The thicker upper portion is located at the junction between the wiring structure and the adjacent dielectric materials. The thicker upper portion: (1) minimizes metal ion diffusion and, thereby TDDB; (2) allows a wire width to dielectric space width ratio that is optimal for low TDDB to be achieved at the top of the wiring structure; and (3) provides a greater surface area for via landing. The thinner lower portion: (1) allows a different wire width to dielectric space width ratio to be maintained in the rest of the wiring structure in order to balance other competing factors; (2) allows a larger cross-section of wire to reduce current density and, thereby reduce EM; and (3) avoids an increase in wiring structure resistivity.

The invention discloses a method for controlling battery heating in a charging mode. A charging system is employed and comprises a charger, a battery management system and a heater, wherein the charger comprises a first output end and a second output end; the first output end is connected with a charged battery by a charge relay; and the second output end is connected with the heater by a heating relay. According to the method, a specific temperature value is set; when the mean temperature of the battery is in different temperature intervals, the charger changes working states flexibly, so that the battery is charged only under the conditions of the appropriate temperature and the stable state; the heating is required to be controlled at the too low temperature; and the battery is charged after cooled for a period of time at the excess temperature. The strong conductivity of the battery can be maintained, the ionic diffusion speed is high, so that the damage to the battery caused by charging at the low temperature is reduced, and the influence on the battery charging when the state of the battery is unstable can be avoided.

The invention discloses a prussian blue/tungsten trioxide electrochromic film and a preparation method thereof. The film has a double-array ordered structure and large specific surface area and can increase ordered ion diffusion channels for electrolyte ions and selectively modulate near infrared light bands and visible light bands. The preparation method comprises the steps as follows: firstly, taking a polystyrene template as a working electrode and an aqueous solution of sodium tungstate, hydrogen peroxide and hydrochloric acid as an electrodeposition solution, removing the polystyrene template after electrochemical deposition to obtain a tungsten trioxide electrochromic film with a bowl-like ordered structure, then, taking the obtained tungsten trioxide electrochromic film with the bowl-like ordered structure as a working electrode and an aqueous solution of FeCl3, K3[Fe(CN)]6 and KCl as an electrodeposition solution, and performing electrochemical deposition to obtain the prussianblue/tungsten trioxide electrochromic film. The preparation method requires no roasting and has the advantages that the method is convenient to operate, efficient and energy-saving, the product is controllable and the like.

The invention relates to a forming method of a diffusion zone, comprising the following steps of: forming a pre-doping layer on the surface of a semiconductor substrate, wherein doping ions are contained in the pre-doping layer; forming a protecting layer on the pre-doping layer; annealing the semiconductor substrate; and diffusing the doping ions in the pre-doping layer into the semiconductor substrate. In the invention, by replacing the traditional mode of injecting ions to dope the diffusion zone with a furnace tube thermal diffusion technology, the damage to the surface of the semiconductor substrate by ionic bombardment is avoided, foreign ions are ensured to be more evenly distributed in the diffusion zone, a surface lattice structure is improved and a subsequent technology is benefited. In the process, the technological flow is slightly regulated, the complexity is not obviously increased, the production cost is not obviously increased, and the productivity is increased to a certain extent.

The invention discloses a resistive random access memory and a manufacturing method thereof. The resistive random access memory comprises a substrate, and a first electrode, a resistive dielectric layer, a barrier layer and tunneling layer and a second electrode which are sequentially located on the substrate. The barrier layer and tunneling layer comprises a multi-layer two-dimensional material,and the two-dimensional material is one of the following materials: HBN, MoSe2, MoTe2, WS2, WSe2 or WTe2. The multi-layer two-dimensional material is inserted between the second electrode and the resistive dielectric layer. In the setting process, oxygen ions can be effectively prevented and limited from diffusing into the second electrode and generating an oxidation reaction with the second electrode, consumption of the oxygen ions is reduced, and meanwhile the tunneling effect of the two-dimensional material is used for improving the low-resistance-state resistance. In the resetting process,the second electrode does not need to serve as an oxygen storage layer to provide oxygen ions, enough oxygen ions can participate in oxygen vacancy compounding under the condition that large voltageis not applied to generate large current, and complete resetting can be achieved. The cycle characteristic of the device is integrally improved, and the programming energy consumption is reduced.

The invention provides a fluoride/oxide co-coated positive electrode material which comprises a positive electrode material main body, a composite coating layer and a diffusion doping layer, and is characterized in that the composite coating layer is a continuous coating film formed by uniformly coating the surface of the positive electrode material main body with oxyfluoride; and the diffusion doping layer is formed by diffusing partial metal element ions in the composite coating layer to the surface layer of the positive electrode material main body. The invention also provides a preparationmethod of the fluoride/oxide co-coated positive electrode material. The positive electrode material provided by the invention has relatively good cycling stability, storage life, high-temperature performance and safety performance under high voltage.

The invention relates to a surface-coated solid solution cathode material and a preparation method thereof and belongs to the field of new energy material. The surface-coated solid solution cathode material of the invention is obtained by coating the surface of (x)Li2MnO3.(1-x)LiNiCoMn<1-a-b>O2 with Li<z>A<0.5>Mn<1.5>O<y>, and the coating amount accounts for 1 to 20 percent of the total mass of the cathode material. The material takes full use of Li2O deintercalated in the charging process of lithium-rich solid solution cathode material, and the Li2O is further intercalated in Li<z>A<0.5>Mn<1.5>O<y> to form the spinel-type surface coating LiA<0.5>Mn<1.5>O4 with three-dimensional ion diffusion channels. The transmission of the lithium-ions in the surface of the (x)Li2MnO3.(1-x)LiNiCoMn<1-a-b>O2 cathode material is effectively improved so as to improve first coulombic efficiency and rate capability of the surface-coated sosoloid cathode material.