231results about How to "Reduce capacity loss" patented technology

The invention discloses a thick electrode with a good electrochemical performance. The electrode comprises a current collector and an electrode membrane containing active substances and conductive substances. With a thickness greater than 300 micrometers, the electrode membrane includes an internal membrane layer close to the current collector and an external membrane layer far from the current collector. The conductivity of the electrode membrane decreases from the internal membrane layer to the external membrane layer, while the porosity of the electrode membrane increases from the internal membrane layer to the external membrane layer. The internal membrane layer has great conductivity which can make electrons at the current collector entering or separating from the internal membrane layer rapidly. With great porosity, the external membrane layer can adsorb a lot of electrolyte, thus solving the problem of poor electrolyte wettability of thick electrodes. In addition, the invention also discloses a preparation method of a thick electrode with a good electrochemical performance.

An electrochemical cell including a multi-layer solid-state electrolyte, a battery including the cell, and a method of forming the battery and cell are disclosed. The electrolyte includes a first layer that is compatible with the anode of the cell and a second layer that is compatible with the cathode of the cell. The cell exhibits improved performance compared to cells including a single-layer electrolyte.

The invention provides a kind of distribution method and device for the upstream and the downstream resources in the time division duplex mobile communication system. The method includes following steps: the upstream and the downstream service proportion and the load information are acquired; the available resource amount in several distribution projects is calculated; the available resources amounts are compared, the distribution project whose available resource amount is the maximal are determined; compares the resources upstream and downstream proportion correspondent in the optimized distribution project and the one in current system and judges if they are the same, if not, the upstream and the downstream gap conversion of each community in the system are set according to the optimized project; when they are the same, it doesn't adjust the gas conversion. The invention reduces the system capacity loss caused by the asymmetry, it increases the capacity of the system, upgrades the utilization rate of the spectrum.

The invention belongs to the technical field of lithium ion batteries and particularly relates to a method for supplementing lithium to a lithium ion battery pole piece. The method includes the following steps that 1, lithium colloidal particles of core-shell structures are prepared, shell layers are made of rubber and / or resin, core layers are made of metal lithium, and metal lithium is coated with the shell layer materials to form the lithium colloidal particles; 2, the lithium colloidal particles obtained in the step 1 and an electrode active material are mixed to prepared into electrode active slurry, then the surface of a current collector is evenly coated with the mixed electrode active slurry, and drying is carried out. The lithium colloidal particles of the core-shell structures are used for the battery pole piece to prepare a lithium-rich battery pole piece. The method for supplementing lithium to the lithium ion battery pole piece is easy to operate, safe and efficient, the risk that metal lithium is oxidized is avoided, the requirements for the environment and equipment are low, the production cost can be reduced, meanwhile, the first-time coulombic efficiency and cycle performance of a lithium ion battery adopting the battery pole piece are both obviously improved, and battery capacity losses caused by irreversible cycle are greatly reduced.

Provided are electrode compositions for lithium-ion electrochemical cells that include novel binders. The novel binders include lithium polysalts of carboxylic and sulfonic acids, lithium salts of copolymers of acids, lithium polysulfonate fluoropolymers, a cured phenolic resin, cured glucose, and combinations thereof.

The invention relates to a lithium ion battery composite cathode material and a preparation method thereof, which belongs to the technical field of lithium ion battery. The invention aims at improving the cycle performance of silicon cathode material at the same time when keeping the high ratio volume of lithium ion battery silicon cathode material. The proposal of the invention is that silica-based material coated by disordered carbon is treated with surface modification processing by utilizing lithium salt, namely, the lithium salt is coated on the surface of Si / G / DC (silicon / graphite / disordered carbon) to be prepared into the composite cathode material, therefore, the lithium-embedding and removing depth of the silicon can be effectively controlled, and the material is the lithium ion battery composite cathode material which has high specific capacity and good cyclical stability; furthermore, the material is safe and pollution-free, and presents higher thermal stability in various lithium salt electrolytes and solvents.

The invention discloses an anode material which comprises a stack layer of graphene sheets and tin metal particles, wherein the tin metal particles are embedded into the graphene sheets or distributed among the graphene sheets. The invention also discloses a manufacturing method of the anode material, and the manufacturing method comprises the following steps of: directly reducing tin hydroxide on the graphene sheets by adopting a one-step total heating reduction method to obtain the tine metal particles; and baking to obtain a tin-graphene composite material. The invention also discloses a lithium ion battery, and the negative electrode of the lithium ion battery is manufactured by using the lithium ion battery anode material. The lithium ion battery anode material is high in specific capacity, the first-time discharge capacity can reach 600-900 mAh / g, and the capacity can reach 550-820 mAh / g when the discharge is stable; the cycle life of the lithium ion battery anode material is long, and the number of cycles can reach over 1,000; and the lithium ion battery anode material is simple in preparation process, and is suitable for industrial production.

A transistor includes an n-well implanted in a substrate, a source region including a p-body region, a n+ region and a p+ region in the p-body region, a drain region comprising a n+ region, and a gate between the source region and the drain region. The p-body region includes a first implant region having a first depth, a first lateral spread and a first concentration of a p-type impurity, and a second implant region having a second depth, a second lateral spread and a second concentration of the p-type impurity. The second depth is less than the first depth, the second lateral spread is greater than the first lateral spread and the second concentration is greater than the first concentration. The p+ region and n+ region abut the second implant region.

A method for preparing a nanostructured composite electrode through electrophoretic deposition and a product prepared thereby are presented. A conductive material and an active material are suspended into a stable suspension in solution by ultrasonication. The conductive material includes functionalized carbon multi-walled nanotubes. The active material includes synthesized nanoparticles. A surface charge is applied to the active material by adding an electrolyte into the stable suspension. At least two electrodes are introduced into the stable suspension in opposing parallel orientation. A direct current electrical field is formed between the electrodes sufficient to cause conductive material and the active material formation thereupon.

The invention provides a lithium ion battery and a negative pole piece thereof. The negative pole piece of the lithium ion battery comprises a negative pole current collector and a negative pole active material layer which is arranged on the negative pole current collector. The negative pole piece of the lithium ion plate is characterized by further comprising a hard carbon material layer which contains hard carbon and is arranged on the negative pole active material layer. The hard carbon material layer also contains lithium salt which has mixture of lithium carbonate, lithium sulfide, lithium carbonic ester, alkoxy lithium, lithium sulphonate and alkyl diester lithium. The lithium ion battery comprises a positive pole piece, a negative pole piece which adopts the negative pole piece of the lithium ion battery, an isolating membrane arranged between adjacent positive and negative pole pieces, and electrolyte. By utilizing the lithium ion battery and the negative pole piece, the low temperature performance and the safety performance of the battery are effectively improved, and the rate capability and the discharge efficiency of the lithium ion battery are improved, the service life of the lithium ion battery is prolonged.

A non-sintered nickel electrode for alkaline electrolyte storage cells including a current collector and a paste containing an active material based on nickel hydroxide and a conductive material, wherein said conductive material is a lithium-containing cobalt and nickel oxide whose degree of oxidation obtained after electrochemical conditioning is stable after prolonged storage in the alkaline electrolyte.

The invention relates to a medical instrument for cutting biological and especially human tissue, having a hollow cutting tube that can rotate by means of an engine around its longitudinal axis, on whose distal end at least one blade is mounted, as well as with a handle in which the cutting tube is mounted for control purposes. In order to produce a medical instrument for cutting biological and especially human tissue in which the powering of the cutting tube is of simple construction and involves minor losses of capacity, it is proposed with the invention that the engine is configured as a hollow-shaft engine mounted on the cutting tube.

The invention discloses a surface coating method for a ternary positive material of a lithium ion battery. The surface coating method comprises the following steps: 1, mixing lithium fluoride with a strong polar solvent in the mass ratio of (0.1-100) to 100, and stirring to form a homogeneous solution A; 2, transferring the ternary material into the solution A in the mass ratio of lithium fluoride to the ternary material of (0.05-10) to 100 and continuously stirring to form a turbid liquid B; 3, adding a poor solvent to the turbid liquid B which is stirred in the mass ratio of the turbid liquid B to the poor solvent of (0.1-100) to 1, thereby forming a turbid liquid C, and aging for 0.5-48 hours; 4, filtering the turbid liquid C, washing a filter cake by use of a volatile lithium fluoride poor solvent and drying the filter cake at 50-100 DEG C; and 5, calcining the filter cake, thereby obtaining the lithium fluoride coated ternary positive material. The surface coating method is capable of realizing relatively even coating, effectively inhibiting side reactions of an electrode, prolonging the cycle life of the electrode, lowering the safety risk of the battery and reducing the capacitance loss of the battery.

The invention provides a cathode material of a lithium ion battery. The cathode material comprises a high-capacity cathode active material, a lithium supplementing material, a conductive agent and a binder, wherein the mass percentage ratio of the high-capacity cathode active material to the lithium supplementing material to the conductive agent to the binder is (77-97%):(1-15%):(0.1-3%):(1-5%); the chemical formula of the lithium supplementing material is LixMyNz, x is larger than or equal to 1 and smaller than or equal to 8, y is larger than or equal to 1 and smaller than or equal to 6, z islarger than or equal to 1 and smaller than or equal to 6, M is one or more metal elements of Fe, Cu, Mn, Zr, Mg and Al, and N is one or more non-metal elements of O, N, F, B and S. The invention alsoprovides a preparation method of the cathode material of the lithium ion battery and the lithium ion battery. According to the cathode material of the lithium ion battery, the preparation method andthe lithium ion battery provided by the invention, the capacity exertion of the cathode active material can be improved, the active lithium consumed by the first irreversible capacity loss is well compensated, and the energy density of the lithium ion battery is further improved.

The invention relates to a run-through type non-split-phase balanced power supply electrified railway traction system, belonging to the technical field of railway electric traction power supply. The system comprises traction transformators, all sections of traction networks and current equalizers, wherein, each section of traction power supply network is provided with an energy distribution regulating machine which mainly consists of a main controller, a driver, an electronic power switch bridgearm, a support capacitance arm, three electric current sensors, three voltage transducers and three reactors; A phase of the output end of each traction transformator is connected with the traction power supply network, B phase thereof is connected with the energy distribution regulating machines, and C phase thereof is connected with a steel rail; the main controller of each of the energy distribution regulating machine is connected with a control center. The invention has the advantages that split-phase power supply is changed into non-split-phase power supply, and great run-through of the traction contact network can be realized, so that safe, high speed and high-efficiency running of train can be guaranteed.

The invention discloses a lithium sulfur battery anode material and preparation method thereof, melamine formaldehyde resin rich in nitrogen is taken as a carbon source and nitrogen source, a nitrogen-rich hollow eggshell with the diameter of 100-300 nm is prepared with a nanometer SiO2 casting method, the interfacial adsorption of polysulfide is enhanced by the aid of the combined effect of physical adsorption and chemical adsorption, migration and shuttle effects of the polysulfide are effectively restrained, and charge and discharge stability of a lithium sulfur battery is enhanced. At the same time, an eggshell structure is formed after the hollow eggshell is filled with sulfur, and an interior gap exists between a sulfur inner core and a polymer shell so as to accommodate volume expansion in a sulfur atom lithiation process. The lithium sulfur battery anode material is applied to preparation of a lithium sulfur battery anode and the lithium sulfur battery. The lithium sulfur battery has excellent cycle performance and capacity retention ratio.

The invention proposes a charging optimization method of a lithium ion battery, and belongs to the technical field of a lithium ion battery. The charging optimization method comprises the following steps of performing constant-current charging on the lithium ion battery by employing first-stage charging rate; performing constant-current charging on the lithium ion battery by employing second-stagecharging rate when the voltage reaches a charging cutoff voltage of the lithium ion battery; performing similarly until constant-current charging of a fourth stage is performed; and employing short-time constant-voltage charging when the voltage reaches the charging cutoff voltage of the lithium ion battery, and stopping charging when the constant-voltage charging time reaches preset time. With the charging optimization method proposed by the invention, the charging time can be reduced, the capacity loss is reduced, the service lifetime of the battery is prolonged, and the circuit is easy toimplement.

This invention generally relates to image processing systems. More particularly it relates to systems and methods for displaying images using multi-line addressing (MLA) or total matrix addressing (TMA) techniques, and to techniques for post-processing of data for display generated by these techniques. Embodiments of the invention are particularly useful for driving OLED (organic light emitting diode) displays. We describe a method of driving an electroluminescent display to display an image using a plurality of temporal sub-frames, data for a said sub-frame comprising a first set of drive values (R;C) and second set of drive values (C;R) for driving respective first and second axes of said display, a said sub-frame having an associated sub-frame display time. The method comprises: determining a said sub-frame display time for a displayed sub-frame responsive to one or more of said drive values for the sub-frame; and driving said display to display said temporal sub-frames for respective said sub-frame display times.

The invention discloses a metal zinc negative electrode with a uniform mesoporous structure coating and a preparation method and application thereof, belonging to the technical field of aqueous zinc ion batteries. The metal zinc negative electrode comprises a zinc negative electrode and a clay slurry layer, and is prepared by pre-embedding zinc. The raw material powder of the clay slurry includes1-20wt% of polyvinylidene fluoride and 80-90wt% of clay material. The aqueous zinc ion battery negative electrode coating presented in the invention can play a role of a protective layer, isolate thedirect contact between the zinc negative electrode and the electrolyte to a certain extent, reduce the side reaction between the electrode and the electrolyte and improve the cycle stability. The layered porosity of the material itself can prevent dendrites from being generated and penetrating a diaphragm in the cycle process, alleviate the volume expansion of the negative electrode, reduce the occurrence of short circuit of the battery and improve the safety performance.

This invention provides a type of lithium iron phosphate cathode active material and its method of synthesis. Said cathode active material contains the sintering product of lithium iron phosphate and a mixture. Said mixture comprises of two or more metal oxides where the metal elements are selected from groups II A, III A, IV A, V A, III B, IV B, or V B, and where the weight of one metal oxide is 0.5-20% of the weight of the other metal oxide. Greatly increased capacity can be achieved in rechargeable lithium-ion batteries using the lithium iron phosphate cathode active material provided by this invention.

This invention discloses a method and a device for using cross slot resources in the time division duplex CDMA system conditions for using cross slots, assigning cross slot resources for users according to the designed conditions of using cross slots when a user applies for cut-in monitoring the cut-in user status in the cross slot to regulate and maintain the cross slot resources assigned to users. The device for realizing the said method is composed of a designing device, a storage device, a monitor device and a cross-slot distribution device.

The invention discloses a sodium ion battery negative electrode material and a preparation method thereof, and the preparation method comprises a preparation method (1) or a preparation method (2). The preparation method (1) is: firstly activating the soft carbon and then coating the hard carbon; the preparation method (2) is: firstly activating the hard carbon and then coating the soft carbon. The preparation method firstly introduces a large number of developed pore structures by activating the soft carbon / hard carbon to provide more storage space for sodium ions, which is favorable for theincrease of material capacity; then the coating of a hard carbon / soft carbon precursor can effectively cover the defects and edge faces caused by the activation, reduce the irreversible capacity losscaused by the insertion and removal of sodium ions, and effectively improve the first-week coulomb efficiency. The sodium ion battery negative electrode material of the invention has the advantages oflow cost, high capacity and high first-week coulomb efficiency, and high cost performance; in addition, the preparation method of the invention is simple and suitable for commercial application.

The invention discloses a lithium-rich manganese-based high-energy-density lithium-ion battery and a preparation method thereof. According to the battery, with a lithium-rich manganese-based material doped with lithium vanadium phosphate as a positive electrode and a mixed material of a nano silicon-carbon material and graphite as a negative electrode, through optimal configuration of a conductive agent, a diaphragm, an electrolyte and the like, the influences to the battery performance due to the structure change of the lithium-rich manganese-based material and silicon volume expansion in a cyclic process are effectively reduced. The preparation process of the battery comprises the following steps: active material premixing, pulping, film production, winding / laminating, packaging, liquid injection, secondary packaging, formation, inspection and the like. The battery has the advantages of high energy density, high safety coefficient, relatively long cycle lifetime and the like and can be used as a dynamical chemical power source.

Air conditioner for conditioning a space inside a building includes a heat source unit and at least one indoor unit. The heat source unit has a heat exchanger unit and a compressor unit. The heat exchanger unit includes a first heat exchanger disposed in a first casing and configured to exchange heat with a heat source. The compressor unit includes a compressor disposed in a second casing separate from the first casing, the heat exchanger unit and the compressor unit being fluidly connected via a first liquid refrigerant pipe and a first gaseous refrigerant pipe. At least one indoor unit has a second heat exchanger configured to exchange heat with the space to be conditioned and being fluidly communicated to the heat exchanger unit and / or the compressor unit via a second liquid refrigerant pipe and a second gaseous refrigerant pipe. The outer diameter of the first liquid refrigerant pipe is larger than the outer diameter of the second liquid refrigerant pipe and / or the outer diameter of the first gaseous refrigerant pipe is larger than the outer diameter of the second gaseous refrigerant pipe.

An electronic device packaging assembly (10) that includes a ball grid array (60) and specialized construction to be able to operate from DC up to 50 GHz with minimal parasitic losses. The packaging assembly (10) includes a thin base plate (14) made of a suitable rigid material. Power vias (48), signal vias (26) and ground vias (46) are formed through the base plate (14) to be coupled to traces, circuit components, and / or the device (12) within the packaging assembly (10). An impedance matching compensation network (28) provides impedance matching between the device (12) and the signal vias (26). The ball grid array (60) includes a plurality of solder balls (68), including ground solder balls (72), signal solder balls (74) and power solder balls (76), electrically coupled to the appropriate via extending through the base plate (14).

A lithium ion secondary battery includes: a cathode that stores / releases lithium ion at a potential not lower than an oxidation-reduction equilibrium potential between halogen ion and halogen; an anode that stores / releases lithium ion, preferably containing carbon; and a non-aqueous electrolytic solution composed of a non-aqueous solvent having dissolved therein an electrolyte. The non-aqueous electrolytic solution contains lithium halide or a halogen molecule. Instead of the non-aqueous electrolytic solution, a polymer solid electrolyte containing lithium halide or halogen molecule may be used.

The invention provides a fast and slow vehicle real-time marshalling operation organization method adopting a virtual marshalling technology. The method comprises the steps that in a fast and slow train collinear running line section, two trains keep a safe distance to run in a normal tracking mode in a first interval, one train is a slow train, the other train is a fast train, and the two trains are coupled into a large-marshalling train to run in the first interval through the virtual marshalling technology based on train-train communication; and before the large-marshalling train enters the station, the type of a front station, and completing the fast and slow train operation organization process is judged by adopting a corresponding operation organization method according to the type of the front station and the fast and slow train types of the two trains. According to the fast and slow train real-time marshalling operation organization method adopting the virtual marshalling technology, the transportation efficiency can be improved, the travel time of passengers is shortened, and the line trafficability loss is reduced.